CN101816151A - Communication device, its control method, communication system, data transmission system, communication device control program, and recording medium containing the program - Google Patents
Communication device, its control method, communication system, data transmission system, communication device control program, and recording medium containing the program Download PDFInfo
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- H—ELECTRICITY
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- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/43615—Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
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- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
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- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
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- H04B2203/5429—Applications for powerline communications
- H04B2203/545—Audio/video application, e.g. interphone
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Abstract
An STB (17) is connected to a network and receives a content from a VoD server (12) via networks containing that network. The STB (17) includes: associated information acquisition unit (41) which all-at-once acquires associated information on contents containing the bit rate indicating the band required for transmitting the contents; a band decision unit (42); and a band report unit (44). Even when data received is replaced by another data according to a plurality of associated information acquired by the associated information acquisition unit (41), the band decision unit decides a sufficient band which is sufficient for transmitting the replaced data. The band report unit (44) requests a PLC parent device (15) which manages data transmission in the networks, to set the sufficient band decided by the band decision unit (42).
Description
Technical field
The present invention relates to be connected and be situated between by the network more than 1 that has comprised this network with network, from server, receive data communicator and this control method of communication apparatus, communication system, data communication system, communication device control program, record the recording medium of this control program.Be specially, the present invention relates in order to the communicator that receives the content that sends from server etc.
Background technology
A kind of like this service is arranged at present, promptly, (next generation network: Access Network such as net Next GenerationNetwork), (TV: television) receiver (following record is " TV "), STB (set-top box) wait these contents such as outer video that content providing devices such as content server provided of residence or audio frequency are flowed reception Jie by the TV in the residence by NGN.When the data from Access Network were transferred in the residence, data were temporarily received by gateway (router) earlier, then via network constructed in the residence, are sent to the communicator (TV, STB etc.) as content receiver terminal.About being connected between router and the receiving terminal, the general Ethernet (registered trade mark) (Ethernet (registered trade mark)) that uses is realized, but, just need install Ethernet (registered trade mark) cable when if router and communicator are separately positioned on not chummery.
By comparison, power line transmission communication (PLC:Power Line Communication) technology is a kind ofly to carry out the technology that data transmit by power line, and it need not special operation just can realize communication between general socket.As long as the Biodge device (PLC adapter) between PLC and the Ethernet (registered trade mark) is connected to router and communicator respectively by Ethernet (registered trade mark), even router and communicator separate configuration so, also can realize communicating by letter between router and the communicator, and need not to install in addition cable and just can construct network in the residence via the PLC adapter.In addition, use the Biodge device between WLAN and the Ethernet (registered trade mark) also can similarly construct network in the residence.
In above-mentioned system, communicator just need be guaranteed sufficient bandwidth corresponding to content if will at full speed come received content, particularly motion video, audio frequency etc. to require real-time (intersexuality actual time) and successional flow data with high-quality from content providing device in each network.
In general, when coming audio-visual content by above system, the outer content providing device of residence can be according to user's requirement, at first use contents list, digital content menu (ECG:electronic contentsguide) to user notification the inherent content of the content that can provide, the user selects content according to this inherence content then, receive the audiovisual request of this selecteed content when the foregoing generator after, just should selecteed content be sent to above-mentioned communicator.VoD (the video request program: be used Video On Demand) of being everlasting of this mode.Perhaps, the foregoing generator is situated between by above-mentioned communicator, comes to notify to the user the inherent content of the content that institute can provide, the flow data of sending out identical to a plurality of recipients' biographies then with electric program menu (EPG:electronic program guide).This mode is called as multicast (multicast), and it is used in IP broadcast etc.
Yet, the back of gateway also has network in the residence of constructing with power line communication in user's residence, and content providing device such as server and do not know the bandwidth behaviour in service or the allocated bandwidth situation of network in this residence, therefore, in fact in the residence bandwidth of network guarantee have to decide with user's (or constitute network in the residence device).Therefore, as above-mentioned system, after above-mentioned gateway Jie has received content by above-mentioned Access Network, when network transmits in this content will be by other residences different with above-mentioned Access Network, pass the content of sending out if will make above-mentioned communicator not receive this institute mussily, just need also in above-mentioned residence, to guarantee bandwidth in the network.That is, need be by user's (or, constitute the device of network in the residence) network bandwidth in the required residence when guaranteeing that content receives.
In addition, the user is when the audiovisual content, and the content that switches to other is sometimes carried out audiovisual.About this type of situation, for example have, when utilizing VoD, the user select with just at the different other guide of the content of audiovisual; And when utilizing IP broadcast, the user switches to other channels to the channel in audiovisual just.In addition, even without user's clearly indication, communicator also can be received other guide in the follow-up continued access of the end of text that is received sometimes.About this type of situation, for example have, when utilizing IP broadcast, communicator begins to receive next program after the program that is received finishes.
Like this, when the content that receives switched, the necessary bandwidth of the previous content that receives was with the necessary bandwidth of the content of reception might be different afterwards.At this moment, if the bandwidth deficiency of the content after switching just need be guaranteed bandwidth again.Therefore, how to guarantee that the bandwidth of network just becomes important problem in the residence.
In addition, the multicast about in the above-mentioned IP broadcasting in order to control the selection of foregoing, has used IGMP (Internet Group Management Protocol: IGMP).At this moment, communicator can send out when the audiovisual of beginning content and be called the signal that adds packet (join packet), will add multicast group (that is, above-mentioned communicator will join in the multicast biography destination of content) with this to the multicast node notice.On the other hand, when the audiovisual of content finished, above-mentioned communicator sent out and withdraws from packet (leave packet), withdraws from from the multicast group that is added thus.
After withdrawing from packet and being issued, multicast node is just confirmed whether to also have other communicators at audio-visual content earlier, and then the biography that finishes flow data is sent out.In other words, audio-visual content momentary ground while situation of flow transmission in the network in residence just might occur with the flow data of the content of switching this two side of back before switching so if be switched during multicast.
Sequence when the content of institute's audiovisual in the multicast of having represented Figure 27 has taken place to switch.If pass a content A to communicator 101 and communicator 102 from multicast node.At this, when the content of 102 audiovisual of communicator when content A switches to content B, communicator 102 can send out the adding packet that withdraws from packet and begin in order to content of announcement B audiovisual that finishes in order to content of announcement A audiovisual to multicast node.
Yet when this stage, because communicator 101 does not finish the audiovisual of content A, so the flow data of content A still can continue to flow out from multicast node, and arrives the network interface of communicator 102.Send out in order to what content of announcement A audiovisual finished to multicast node up to communicator 101 and to withdraw from packet, the biography that can stop content A is sent out.Consequently, send out the adding packet of content B from communicator 102, to communicator 101 send out content A withdraw from this section till the packet during, the two flow data of content A and content B can carry out flow transmission simultaneously in network.
In addition, as shown in figure 27, even have only communicator 102, send to multicast node from communicator 102 and to withdraw from packet at audio-visual content A, to multicast node confirm to finish whether have face other communicators of listening content till, (for example about 1 second) still needs to take a moment.In this period, the two flow data of content A and content B can arrive communicator 102 simultaneously.
Like this, when the content of institute's audiovisual in the multicast is switched, can increase when the utilized bandwidth of network is compared with independent received content respectively in the residence, owing to want received content, so bandwidth can be not enough, and may cause stablizing received content.So, how to guarantee in the residence that the bandwidth of network is an important problem very.
At present, about in the network of the nearer part of distance user, guaranteeing bandwidth, following technology is for example arranged, promptly, the user selects desired content and is notified to server from the content that server had, server is via the information of base station necessary bandwidth when terminal sends the reception of selected content, then then, terminal changes to the base station requests bandwidth of carrying out transfer according to this bandwidth information, to set new bandwidth (patent documentation 1,2).
Patent documentation 1: Japan's patent application open " spy opens 2002-247131 number "; On August 30th, 2002 is open.
Patent documentation 2: Japan's patent application open " spy opens 2004-274700 number "; On September 30th, 2004 is open.
Summary of the invention
Yet, in the bandwidth settings method of above-mentioned patent documentation 1,2, user elder generation chosen content, notify to server by wireless terminal (communicator that is equivalent to user side) then, can receive thus and the corresponding bandwidth information of selected content, and according to the bandwidth information that is received to change in order to the base station requests bandwidth of managing bandwidth.By this method,, just need to carry out the change of bandwidth, but following problem can take place if when content switches because of user's operation or the process of time.
The first, because bandwidth information is to obtain, guarantee that therefore the time chance of bandwidth delays after content is switched.At this, if bandwidth is not also guaranteed just directly to begin the words of the transmission of content, so from beginning to transmit during content plays this section till finishing bandwidth and guaranteeing, just can become the transmission of do one's best (best effort), therefore, the disorder of video or audio frequency just might take place in this part content that is transmitted in this period of.That is to say, guarantee that the opportunity of bandwidth is slow more, may take place video or audio frequency disorder during just long more.In addition, if begin the transmission of content again after finishing bandwidth and guaranteeing, the opportunity that bandwidth is guaranteed is slow more, and the beginning that content transmits is just slow more, therefore till can begin audio-visual content once more, will need the time of length.
Second, if the necessary bandwidth when transmitting the content after switching increases to some extent than before switching, and bandwidth is used because of the transmission of other flows, and all bandwidth of network just deficiency can take place, and therefore might fully guarantee the bandwidth of the necessity when the content that transmits after switching.The disorder of video or audio frequency can take place when the content that transmits after switching at this moment.
In addition, if the bandwidth settings method of above-mentioned patent documentation 1,2 is applied to multicast, the bandwidth that the base station is guaranteed after content is switched only is: the necessary bandwidth of the predetermined content that will receive after switching.Therefore, when the switching of content, if produce situation about flowing simultaneously with the momentary ground of the flow data that switches this two sides content of back before switching in network, the bandwidth of required necessity just can surpass the bandwidth that guarantee the base station when content received, and the problem of received content therefore can occur stablizing.
To this, the present invention is in view of above-mentioned problem, is purpose to provide a kind of at the communicator that can not delay when certain data switches to other data and receive the data after switching reliably.
For solving the above problems, communicator of the present invention is connected with network, and be situated between by the network more than 1 that comprises this network, receive data from server, this communicator is characterised in that, possess: related information is obtained the unit, with regard to a plurality of above-mentioned data, obtain the related information relevant, wherein with above-mentioned data, above-mentioned related information includes the information of necessary bandwidth at least, and above-mentioned necessary bandwidth is the bandwidth of necessity when transmitting above-mentioned data; The obtained related information in unit is obtained according to above-mentioned related information in bandwidth decision unit, determines abundant bandwidth, and wherein, above-mentioned abundant bandwidth is meant, all enough bandwidth when transmitting any one in the object data that becomes object; The bandwidth settings request unit is to asking in order to manage the management devices that data transmit in the above-mentioned network, so that above-mentioned management devices is set out the above-mentioned bandwidth decision abundant bandwidth that the unit determined.
In addition, for solving the above problems, in control method of communication apparatus of the present invention, this communicator is connected with network, and be situated between by the network more than 1 that comprises this network, receive data from server, this control method of communication apparatus is characterised in that and comprises: related information is obtained step, with regard to a plurality of above-mentioned data, obtain the related information relevant with above-mentioned data, wherein, above-mentioned related information includes the information of necessary bandwidth at least, and above-mentioned necessary bandwidth is the bandwidth of necessity when transmitting above-mentioned data; The bandwidth deciding step obtains related information obtained in the step according to above-mentioned related information, determines abundant bandwidth, and wherein, above-mentioned abundant bandwidth is meant, all enough bandwidth when transmitting any one in the object data that becomes object; The bandwidth settings request step is to asking in order to manage the management devices that data transmit in the above-mentioned network, so that above-mentioned management devices is set out the abundant bandwidth that is determined in the above-mentioned bandwidth deciding step.
According to said structure and method, at first, with regard to a plurality of above-mentioned data, obtain the related information that is associated with the data that will receive from server, and decide abundant bandwidth according to contained necessary bandwidth in a plurality of related informations of obtaining, set this determined abundant bandwidth to the management devices request then.The bandwidth that above-mentioned management devices is guaranteed according to this request is enough to be used in transmitting the data after the switching, therefore can not stagnate and receive reliably the data after switching.
Above-mentioned related information also can be obtained from server, also can obtain from other devices.In addition, also can the request of sending earlier obtain again.For example as electric program guide, from the information of periodic broadcasting, obtain.In addition, the server that is requested related information can be identical with the server of requested date, also can be different.
In communicator of the present invention, also can possess the setup unit of the 1st time of setting band, wherein, above-mentioned the 1st time band has comprised current time; Above-mentioned bandwidth decision unit will be with the data that can receive as above-mentioned object data in above-mentioned the 1st time that above-mentioned setup unit is set, and determine above-mentioned abundant bandwidth.At this moment, even certain predetermined biography that switches in the 1st time band is sent out data,, also can not stagnate and receive reliably the data after switching owing to guaranteed the bandwidth that is enough to be used in transmitting.
In communicator of the present invention, above-mentioned setup unit is also set the 2nd time band, wherein, and with the elementary period of the moment after the tailend of above-mentioned the 1st time band as above-mentioned the 2nd time band; The data supplementing that above-mentioned bandwidth decision unit will can receive at above-mentioned the 2nd time band that above-mentioned setup unit is set is above-mentioned object data, and determines above-mentioned abundant bandwidth.At this moment, even in the 1st time band certain is predetermined to be passed certain predetermined biography of sending out data and switching in the 2nd time band because of the process of time and sends out data even switch to, owing to guaranteed the bandwidth that is enough to be used in transmitting, also can not stagnate and receive reliably the data after switching.
In communicator of the present invention, also possess setup unit, this setup unit is set the 1st time band that comprises current time and is the 2nd time band of elementary period with the moment after the tailend of above-mentioned the 1st time band; Above-mentioned bandwidth decision unit will be with the data that can receive as above-mentioned object data in above-mentioned the 2nd time that above-mentioned setup unit is set, and determine above-mentioned abundant bandwidth; When bandwidth that above-mentioned abundant bandwidth is guaranteed in greater than above-mentioned the 1st time band, above-mentioned bandwidth settings request unit was asked above-mentioned management devices before the elementary period of above-mentioned the 2nd time band, so that above-mentioned management devices is set out above-mentioned abundant bandwidth.
At this moment, in the elementary period of the 2nd time band, above-mentioned abundant bandwidth is guaranteed by above-mentioned management devices.Therefore certain predetermined biography that just can not stagnate and receive reliably the 2nd time band from the elementary period of the 2nd time band is sent out data.
In communicator of the present invention, also possess in order to set the setup unit of the 1st time band and the 2nd time band, wherein, above-mentioned the 1st time band has comprised current time, and with the elementary period of the moment after the tailend of above-mentioned the 1st time band as above-mentioned the 2nd time band; Above-mentioned bandwidth decision unit will be with the data that can receive as above-mentioned object data in above-mentioned the 2nd time that above-mentioned setup unit is set, and determine above-mentioned abundant bandwidth; When bandwidth that above-mentioned abundant bandwidth is guaranteed in less than above-mentioned the 1st time band, above-mentioned bandwidth settings request unit was asked above-mentioned management devices after the tailend of above-mentioned the 1st time band, so that above-mentioned management devices is set out above-mentioned abundant bandwidth.
At this moment, the bandwidth that above-mentioned management devices is guaranteed is after the tailend of the 1st time band, and the bandwidth of being guaranteed from the 1st time band becomes above-mentioned abundant bandwidth.Therefore, till the tailend of the 1st time band, can not stagnate and, can also not stagnate and receive reliably certain predetermined biography of the 2nd time band and send out data reliably in the 1st time band reception data.
In communicator of the present invention, above-mentioned setup unit is respectively to above-mentioned the 1st time band and band of above-mentioned the 2nd time, from the reception end predetermined instant of elementary period institute's data that can receive, the earliest moment is set at tailend.At this moment, the data that institute can receive during the elementary period of the data that institute can receive in the 1st time band and the 1st time band are identical, in addition, when the 2nd time was with the elementary period that interior data that can receive and the 2nd time is with the data that can receive be identical.Therefore, bandwidth decision unit during respectively the elementary period of the 1st time band and the 2nd time band the data that can receive as above-mentioned object data, and determine abundant bandwidth.In addition, also can omit this decision handles.
In communicator of the present invention, above-mentioned setup unit is based on predetermined rule, to setting the elementary period and the tailend of the elementary period of above-mentioned the 1st time band and tailend, band of above-mentioned the 2nd time.At this moment, setup unit can more easily be set the 1st time band and the 2nd time band.Example about predetermined rule for example has: the moment of the elementary period of each time band is 00 minute or 30 minutes; During each time band is 30 minutes; Be with as the 1st time the specified time limit (for example 6 hours) from current time, or the like.
In communicator of the present invention, above-mentioned setup unit is the elementary period that is set at the 2nd time band tailend of the 1st time band.At this moment, even certain that in the 1st time band certain is transmitted that tentation data switches in the 2nd time band transmits tentation data continuously,, also can not stagnate and receive reliably the data after switching owing to guaranteed the bandwidth that is enough to be used in transmitting.
In addition, the elementary period of the 1st time band current time preferably.At this moment, thus the data that the transmission because of server can have been finished to receive foreclose.Therefore can guarantee to obtain more appropriate bandwidth.
In communicator of the present invention, above-mentioned bandwidth decision unit with the 1st data and the 2nd data as above-mentioned object data, and determine above-mentioned abundant bandwidth, wherein, above-mentioned the 1st data are current data that just receiving, and above-mentioned the 2nd data are meant the predetermined data more than 1 that receive after the reception of above-mentioned the 1st data finishes.At this moment, even the data that receive switch to a certain person the 2nd data because of the process of time from the 1st data,, also can not stagnate and receive reliably the data after switching owing to guaranteed the bandwidth that is enough to be used in transmitting.
In communicator of the present invention, above-mentioned bandwidth decision unit as above-mentioned object data, and determines above-mentioned abundant bandwidth with the 2nd data, wherein, above-mentioned the 2nd data are meant that the reception in the 1st data finishes the predetermined data more than 1 that receive in back, and above-mentioned the 1st data are current data that just receiving; When the bandwidth guaranteed in the reception of above-mentioned abundant bandwidth greater than above-mentioned the 1st data, above-mentioned bandwidth settings request unit was asked above-mentioned management devices before the reception of above-mentioned the 2nd data begins predetermined instant, so that above-mentioned management devices is set out above-mentioned abundant bandwidth.
At this moment, begin predetermined instant in the reception of the 2nd data and guaranteed above-mentioned abundant bandwidth by above-mentioned management devices.Therefore, can not stagnate and receive reliably the 2nd data since the reception predetermined instant of the 2nd data.
In communicator of the present invention, above-mentioned bandwidth decision unit as above-mentioned object data, and determines above-mentioned abundant bandwidth to the 2nd data, wherein, above-mentioned the 2nd data are meant that the reception in the 1st data finishes the predetermined data more than 1 that receive in back, and above-mentioned the 1st data are current data that just receiving; When the bandwidth guaranteed in the reception of above-mentioned abundant bandwidth less than above-mentioned the 1st data, above-mentioned bandwidth settings request unit finishes after the predetermined instant above-mentioned management devices to be asked in the reception of above-mentioned the 1st data, so that above-mentioned management devices is set out above-mentioned abundant bandwidth.
At this moment, the bandwidth that above-mentioned management devices is guaranteed is after the reception of the 1st data finishes predetermined instant, and the bandwidth of being guaranteed during by reception the 1st data becomes above-mentioned abundant bandwidth.Therefore, till the reception end predetermined instant of the 1st data, the 1st data can be do not stagnated and receive reliably, the 2nd data can also be do not stagnated and receive reliably.
In communicator of the present invention, above-mentioned bandwidth decision unit handle is obtained the unit corresponding data of obtained related information as above-mentioned object data with above-mentioned related information, and determines above-mentioned abundant bandwidth.At this moment, even switch to the 2nd data from the 1st data continuously, owing to the bandwidth of having guaranteed to be enough to be used in transmitting, so, also can not stagnate and receive reliably the 2nd data after switching.
In communicator of the present invention, above-mentioned bandwidth decision unit handle is obtained the unit corresponding data of obtained related information as above-mentioned object data with above-mentioned related information, and determines above-mentioned abundant bandwidth.At this moment, even switch to and corresponding certain data of all related informations,, also can not stagnate and receive reliably the data after switching owing to guaranteed the bandwidth that is enough to be used in transmitting.
In addition, preferred above-mentioned bandwidth decision unit is from obtaining among the corresponding data of the obtained related information in unit with above-mentioned related information, can be from the data of above-mentioned server reception as above-mentioned object data, and determines above-mentioned abundant bandwidth.At this moment, can be from above-mentioned object data, though can not foreclose from the data that above-mentioned server receives corresponding with above-mentioned related information.Therefore can be appropriately and promptly determine above-mentioned abundant bandwidth.
In communicator of the present invention, above-mentioned bandwidth decision unit from the necessary bandwidth of above-mentioned object data, the necessary bandwidth of maximum as above-mentioned abundant bandwidth.By maximum necessary bandwidth is set for abundant bandwidth, owing to the bandwidth of having guaranteed to be enough to be used in transmitting, so can not stagnate and receive reliably each above-mentioned object data.
In addition, when carrying out the data switching, the two might transmit data before switching and the data after the switching in network.To this, in communicator of the present invention, above-mentioned bandwidth decision unit from the necessary bandwidth of above-mentioned object data, the necessary bandwidth of maximum and second largest necessary bandwidth and as above-mentioned abundant bandwidth.At this moment because guaranteed to be enough to be used in to transmit the data before switching and switch after the two bandwidth of data, so can not stagnate and receive reliably data after switching.
In addition, communication system possesses network is arranged, is connected with this network and in order to manage management devices that data in the above-mentioned network transmit and during with communicator that above-mentioned network is connected, also can realize above-mentioned same effect.
In addition, above-mentioned network is connected with the general communication apparatus that the user is utilized, and it is assumed to be the LAN in the building.About this type of network, the network of power line transmission communication is for example arranged.When for the network of power line transmission communication, can be the power line that lays in the building as communication media, so need not in building, to lay the new cable that is used for network.
In addition, data communication system possesses above-mentioned communication system to be arranged and be situated between by the network of above-mentioned communication system or be situated between and is connected with above-mentioned communication system by other networks different with the network of above-mentioned communication system, thereby when above-mentioned communicator transmits the server of data, also can realize above-mentioned same effect.
In addition, can pass through communication device control program, realize each unit of above-mentioned communicator with computer.In addition, by the above-mentioned communication device control program of record in the recording medium of embodied on computer readable, can carry out above-mentioned communication device control program by computer arbitrarily.
As mentioned above, communicator of the present invention is with regard to a plurality of above-mentioned data, obtain the related information relevant from server with the data that will receive, and decide abundant bandwidth according to the necessary bandwidth that comprises in obtained a plurality of related informations, and the request management device is set out the above-mentioned abundant bandwidth that determines.The bandwidth that above-mentioned management devices is guaranteed according to this request is the bandwidth that is enough to be used in transmitting the data after the switching, so can not stagnate and receive reliably the data after switching.
Description of drawings
Fig. 1 is the block diagram applicable to the basic structure example of communication system of the present invention.
Fig. 2 is the structure skeleton diagram that the content of embodiment of the present invention passes the system of sending out.
Fig. 3 is the block diagram that the expression foregoing passes the primary structure of the STB in the system of sending out.
Fig. 4 is the figure of the sheet form relevance information example of storing in the related information storage part of above-mentioned STB.
Fig. 5 is the sequence chart that the expression foregoing passes the data flow that is transmitted in the system of sending out.
Fig. 6 is the flow chart that the expression foregoing pass to be sent out the handling process of VoD server in the system, PLC main frame, STB.
Fig. 7 is the flow chart that bandwidth decision detailed among the above-mentioned STB of expression is handled.
Fig. 8 is that the content of other execution modes of expression the present invention passes the skeleton diagram of sending out system configuration.
Fig. 9 is the sequence chart that the expression foregoing passes the data flow that is transmitted in the system of sending out.
Figure 10 is the flow chart that the expression foregoing pass to be sent out the handling process of multicast node in the system, EPG server, PLC main frame, STB.
Figure 11 is the figure of the sheet form EPG example that sent of above-mentioned EPG server.
Figure 12 is the flow chart that the content of other execution modes of expression the present invention passes the data flow that is transmitted in the system of sending out.
Figure 13 is the flow chart that the expression foregoing pass to be sent out the handling process among the STB of system.
Figure 14 is the key diagram of the example of the example of the above-mentioned EPG of expression and the abundant bandwidth that determined by this EPG.
Figure 15 is the flow chart that the detailed decision of above-mentioned abundant bandwidth is handled.
Figure 16 is the figure that the bandwidth determination section of a content biography system of other execution modes of the present invention determined and be stored to the sheet form bandwidth table (table) of decision bandwidth storage part.
Figure 17 is the flow chart that foregoing pass to be sent out the handling process among the STB of system.
Figure 18 is the detailed process flow chart of the above-mentioned bandwidth determination section of expression when the above-mentioned bandwidth of decision.
Figure 19 is the abundant bandwidth B of decision (c, the detailed process flow chart in the time of t) in the handling process of above-mentioned STB.
Figure 20 is the figure that the bandwidth determination section of a content biography system of other execution modes of the present invention determined and be stored to the sheet form bandwidth table (table) of decision bandwidth storage part.
Figure 21 is the flow chart that the expression foregoing pass to be sent out the handling process among the STB of system.
Figure 22 is the detailed process flow chart of above-mentioned bandwidth determination section when the above-mentioned bandwidth of decision.
Figure 23 is the abundant bandwidth B of decision (c, the detailed process flow chart in the time of t) in the handling process of above-mentioned STB.
Figure 24 is the figure that the bandwidth determination section of a content biography system of other execution modes of the present invention determined and be stored to the sheet form bandwidth table (table) of decision bandwidth storage part.
Figure 25 is the flow chart that the expression foregoing pass to be sent out the handling process among the STB of system.
Figure 26 is the detailed process flow chart of above-mentioned bandwidth determination section when the above-mentioned bandwidth of decision.
Figure 27 is, the sequence chart the when content that existing content passes institute's audiovisual under the multicast in the system of sending out is switched.
Figure 28 is that the content of other execution modes of the present invention pass to be sent out the process chart among the STB of system.
Figure 29 is that the content of another embodiment of the present invention pass to be sent out the process chart among the STB of system.
Figure 30 is the illustration the when bandwidth of whether having been guaranteed in order to the necessary bandwidth of expression content is guaranteed that state is shown in TV.
Figure 31 is other illustrations when above-mentioned bandwidth is guaranteed that state is shown in TV.
Figure 32 (a) is an illustration of representing above-mentioned necessary bandwidth and current bandwidth in guaranteeing with a bar-shaped figure together.
Figure 32 (b) is other illustrations of representing above-mentioned necessary bandwidth and current bandwidth in guaranteeing with a bar-shaped figure together.
Figure 33 is, the illustration when guaranteeing above-mentioned bandwidth on the overlapping a part of zone that is presented at the video content that is just showing of state in TV.
Figure 34 (a) is the illustration that above-mentioned bandwidth shown in the above-mentioned zone is guaranteed state.
Figure 34 (b) is other illustrations that above-mentioned bandwidth shown in the above-mentioned zone is guaranteed state.
Figure 34 (c) is other illustrations that above-mentioned bandwidth shown in the above-mentioned zone is guaranteed state.
Figure 35 (a) is other illustrations that above-mentioned bandwidth shown in the above-mentioned zone is guaranteed state.
Figure 35 (b) is other illustrations that above-mentioned bandwidth shown in the above-mentioned zone is guaranteed state.
Figure 35 (c) is other illustrations that above-mentioned bandwidth shown in the above-mentioned zone is guaranteed state.
Figure 36 is other illustrations when above-mentioned bandwidth is guaranteed that state is shown in TV.
Figure 37 is other illustrations when above-mentioned bandwidth is guaranteed that state is shown in TV.
Figure 38 (a) is other illustrations that above-mentioned bandwidth shown in the above-mentioned zone is guaranteed state.
Figure 38 (b) is other illustrations that above-mentioned bandwidth shown in the above-mentioned zone is guaranteed state.
Figure 39 (a) is other illustrations that above-mentioned bandwidth shown in the above-mentioned zone is guaranteed state.
Figure 39 (b) is other illustrations that above-mentioned bandwidth shown in the above-mentioned zone is guaranteed state.
Figure 40 is other illustrations when above-mentioned bandwidth is guaranteed that state is shown in TV.
Figure 41 is other illustrations when above-mentioned bandwidth is guaranteed that state is shown in TV.
(label declaration)
1 communication system
2 servers
3 the 1st networks
4 network transferring devices
5 network administration apparatus
6 the 2nd networks
7 communicators
11 contents pass the system of sending out
12 VoD servers
13 NGN nets
14 home gateways (HGW)
15 PLC main frames
16 PLC networks
17 set-top box (STB)
18,18a, 18b, 18c PLC adapter
19 equipment
20 TV receivers
31 control parts
32 storage parts
33 Department of Communication Forces
34 input parts
35 efferents
41 related information obtaining sections (related information is obtained the unit)
42 bandwidth determination sections (bandwidth decision unit, setup unit)
43 select the indication obtaining section
44 bandwidth notice portions (bandwidth settings request unit)
45 content obtaining sections
46 related information storage parts
47 decision bandwidth storage parts
50 IP broadcast servers
51 multicast node (multicast point)
52 EPG servers
64 control parts
67 bandwidth information obtaining sections
Embodiment
Below, according to Fig. 1 to Fig. 7, Figure 30, Figure 31 an embodiment of the invention are described.
Fig. 1 is the block diagram of the basic structure example of the expression communication system that the present invention was suitable for.As shown in the figure, communication system 1 possess server the 2, the 1st network 3 arranged, network transferring device 4, network administration apparatus the 5, the 2nd network 6, communicator 7.Server 2 is situated between and is connected with network transferring device 4 by the 1st network 3, and communicator 7 is situated between and is connected with network transferring device 4 by the 2nd network 6.In addition, the 2nd network 6 is connecting network administration apparatus 5.
Connect by this, server 2 and a plurality of networks (network group) 3,6 of communicator 7 by being situated between and being connected by network transferring device 4 carry out the transmitting-receiving of data.In addition, 5 pairs of network administration apparatus for example on the network 6 communication bandwidth of equipment room set, thereby carry out the telecommunication management of the 2nd network 6.
In the present embodiment, communicate by the 1st network 3 and the 2nd network 6 these two networks with communicator 7 though establish server 2, server 2 also can communicate by the network of 1 above any amount with communicator 7.
(execution mode 1)
Then, according to Fig. 2, describe with regard to the concrete structure of communication system shown in Figure 11.Fig. 2 is applicable to that content of the present invention passes the structure skeleton diagram of sending out system 11.By reference Fig. 2, can more easily understand the practical structures of the basic simplified structure of Fig. 1.But the system configuration of Fig. 2 only is an example, and it can be various structures.
In Fig. 2, server 2 is corresponding with VoD server 12, and the 1st network 3 is corresponding with NGN net 13, network transferring device 4 is corresponding with home gateway 14, communicator 7 is corresponding with set-top box 17, and network administration apparatus 5 is corresponding with PLC main frame 15, and the 2nd network 6 is corresponding with the PLC network 16 that power line transmission is communicated by letter.
Below, it is " HGW " that home gateway is recorded and narrated.In addition, also can use other Access Network to replace NGN net 13.For example can use ADSL (Asymmetric Digital SubsciberLine: asymmetric numeral is subscribed to circuit) or FTTH (Fiber to the Home: Fiber to the home) etc.
In addition, between PLC network 16 and various device, be provided with PLC adapter 18.PLC adapter 18 is the equipment of changing mutually in order to the signal of the signal of Ethernet (registered trade mark) and PLC.HGW14, STB17 and other equipment 19 all possess the terminal that Ethernet (registered trade mark) usefulness is arranged, by using Ethernet (registered trade mark) cable to be connected with PLC adapter 18, HGW14, STB17 and other equipment 19 just can be situated between by PLC adapter 18 with intercom mutually with PLC network 16.
Below, as shown in Figure 2, be connected in the PLC adapter 18 and the PLC adapter 18 that is connected in STB17 of HGW14 for special expression, separately used label 18a, 18c.In addition, for the special adapter 18 of representing to be connected in PLC main frame 15, used label 18b.
In addition, STB17 is connected with TV20 as display unit one example, and TV20 is in order to the various data of display of video content etc.Among the TV20 also can in keep STB17, can pass through Ethernet (registered trade mark) thus and be connected with PLC adapter 18.Equally, in the example of Fig. 2, though the PLC adapter 18 that HGW14, STB17, equipment 19 are situated between respectively by peripheral hardware links to each other with PLC network 16, they keep the function of PLC adapter 18 in also can be respectively.
In Fig. 2, though PLC main frame 15 is connected the outside of PLC adapter 18b, in fact PLC adapter 18b contains the function of PLC main frame 15.In addition, be not only the function that PLC adapter 18b contains PLC main frame 15, other all PLC adapters 18 also contain the function of PLC main frame 15, so can be according to the communication conditions of PLC network 16, by 1 function of bringing into play PLC main frame 15 in a plurality of PLC adapters 18.But, in the following embodiments, establish the PLC main frame 15 that is independent of PLC adapter 18 and be connected with specific PLC adapter 18b in order to make the present invention be easier to be understood.
Then, describe content in detail and pass the system 11 of sending out with said structure.At first, VoD server 12 passes and sends out its stored video content according to the request from the user.VoD server 12 is the data of the video content that will provide to the user and attach bit rate (bit rate) in these data, transmit required time, provide the storage of these related informations such as price in storage part (not having diagram).
In addition, when STB17 is situated between by remote controller, operation push-button (not having diagram) etc. when the user obtains the indication of certain video content of the desired audiovisual of this user, just be situated between by PLC network 16 and NGN net 13, the transmission request that transmits this video content in order to request passed issue VoD server 12.After VoD server 12 has received the request of transmission, the video content corresponding to this transmission request is sent to requesting party's STB17 with the form of packet.Then, STB17 is reconstructed into video content to the packet of the video content that receives from VoD server 17, and offers the user by TV20 with the form of video.
Like this, in present embodiment and execution mode described later, utilize the concrete example of the data that communicator receives as the user, employing be video content.Below, with video content record and narrate for " content " (contents).In addition, as the example of above-mentioned data,, for example also have the various data such as data of Still image data, voice data, text data, web content except foregoing.
When the VoD server transmitted content to STB17, the network 13,16 in the transmission approach need guarantee to carry out the transmission bandwidth of necessity that content sends.If bandwidth do not guaranteed, the situation that the video that can take place just in the network 13,16 on the transmission approach that the disappearance of packet or the transmission of packet are delayed etc., these for example can cause finally being provided gets muddled.
In mode shown in Figure 2, about the direct-connected NGN net 13 of VoD server 12 self, VoD server 12 can manage the transmission bandwidth of this network 13.Yet, VoD server 12 for himself non-direct-connected network promptly, as the network (being PLC network 16 in the present embodiment) after the HGW14 of network transferring device 4, generally but can't learn: be enough to the smooth transmission bandwidth that transmits content and whether guaranteed.
To this,, according to request, on PLC network 16, guarantee the transmission bandwidth (to call " necessary bandwidth " in the following text) of the necessity when sending foregoing as the STB17 of user's method, apparatus by PLC main frame 15 about PLC network 16.
Fig. 3 has represented that content passes the bilge construction of wanting of the STB17 that sends out in the system 11.As shown in the figure, STB17 possesses control part 31, storage part 32, Department of Communication Force 33, input part 34, efferent 35.Though only represented the structure relevant with the present invention in Fig. 3, STB17 in fact also comprises other structure.
Department of Communication Force 33 is situated between by PLC network 16 etc., carries out data communication with various external equipments such as VoD server 12, PLC main frames 15.
Then, describe control part 31 and storage part 32 in detail.As shown in Figure 3, control part 31 possesses related information obtaining section (related information is obtained the unit) 41, bandwidth determination section (bandwidth decision unit, setup unit) 42, selects indication obtaining section 43, bandwidth notice portion (bandwidth settings request unit) 44, content obtaining section 45.In addition, storage part 32 includes in order to the related information storage part 46 of the related information of memory contents and the decision bandwidth storage part of storing in order to the bandwidth information that bandwidth determination section 42 is determined 47.
Related information obtaining section 41 is in order to the related information of 12 contents that can provide of VoD server to be provided.Be specially, input part 34 is obtained indication from user side, and related information obtaining section 41 is according to this indication then, and before obtaining content, being situated between is earlier provided the related information of this content to 12 requests of VoD server by Department of Communication Force 33 grades.So, be situated between by Department of Communication Force 33 etc., among the content that is provided from VoD server 12, STB17 current the related information of the content that can reset obtain from VoD server 12 in the lump.
Related information obtaining section 41 is stored to related information storage part 46 to the related information of obtaining.In addition, related information obtaining section 41 is situated between and by efferent 35 part or all the related information of obtaining from VoD server 12 or related information storage part 46 is sent to TV20.Thus, the user just can be with reference to the related information that is shown in TV20.
Fig. 4 has represented the example of the related information that is associated with content of storage in the related information storage part 46.In illustrated example, by each content, above-mentioned related information is that bit rate have corresponding relation with the information that is the transmission bandwidth of title and content in order to the information of discerning content all.In illustrated example, contain the related information that title is respectively the content of ABC, DEF, GHI, PQR, XYZ.Be the content (below, record and narrate this content be " content ABC ") of " ABC " about title for example, the bit rate of the necessity when it transmits is 10Mbps.
Be to implement the present invention, the related information of the content that provides from VoD server 12 needs to include bit rate at least, but in order to increase the convenience of user when the chosen content, also can contain other information such as title in the related information.Explanation literary composition of the classification of content, performer's name of coming on stage, inherent content or the like for example.
In addition, when the user can audiovisual content quantity more for a long time, VoD server 12 can the disposable related information that all the elements are not provided, and provides the related information of the content of a part.At this moment, VoD server 12 can be once more when STB17 receives the request of related information of content, and the related information of remaining part or all content is provided.For example, if VoD server 12 have 100 users can audiovisual content, the related information of 10 contents wherein is provided at first, when because of user's operation once more when STB17 receives the request of related information of content, the related information of following 10 contents just is provided.
About the numerical value of bit rate shown in Figure 4, its be for convenience of description and for example, it is not directly based on the numerical value of reality.In addition, in the example of Fig. 4,, also can use channel number, ID numbering etc. though use title to be used as in order to discern the information of content.As long as can be used in the identification content, can use information arbitrarily.
For example, when discerning content by title, owing to might there be the content of same title title, therefore preferably being distributed by 12 pairs of each contents of VoD server can be in order to discern the ID numbering of this content singlely.But for the purpose of simplifying the description, below, be made as that only find a great convenience by title name can single identification content.In addition, as mentioned above,, also can accordingly more information be stored in related information storage part 46 with title in order to increase the convenience of user when the chosen content.
In addition, when related information obtaining section 41 also can be switched at the power supply of STB17, or carry out the request of above-mentioned related information constantly and receive to handle, handle according to each indication of user to replace by each specified time limit or each regulation.In addition, as long as VoD server 12 carries out is IP broadcast, just the electric program guide (EPG) (different with form shown in Figure 4) that can VoD server 12 be provided uses as the related information of content.About using the execution mode of electric program guide, will narrate afterwards.
When the user selected content, related information obtaining section 14 preferably sent to TV20 to the title in the above-mentioned related information, and make TV20 demonstrate title at least.At this moment, the user can more easily come certain content according to the shown title of TV20.In addition, if provide the server of content different with the server that above-mentioned related information is provided, related information obtaining section 41 also can and receive above-mentioned related information to the server requests that above-mentioned related information is provided.
Get back to Fig. 3.Bandwidth determination section 42 determines the transmission bandwidth that need guarantee in the PLC network 16 according to the bit rate (bandwidth information) in 46 correlation information stored of related information storage part.Bandwidth determination section 42 is stored to decision bandwidth storage part 47 to the transmission bandwidth of decision.
Be specially, the bit rate of the maximum in all related informations that bandwidth determination section 42 is stored related information storage part 46 is as the transmission bandwidth that need guarantee in the PLC network 16.In other words, from VoD server 12 that provided and STB17 among all the elements that can reset, the transmission bandwidth that the abundant bandwidth when receiving the highest content of bit rate is guaranteed as above-mentioned need.In addition, bandwidth determination section 41 can move when related information obtaining section 41 is upgraded related information storage part 46 at every turn, or also can move termly.
Select indication obtaining section 43 to be situated between and obtain the selection indication of the content of the desired audiovisual of user by input part 34 from user side.Select indication obtaining section 43 to notify obtained selection indication to bandwidth notice portion 44.In addition, select indication obtaining section 43 from related information storage part 46, to read out the related information of indicating corresponding content with obtained selection, and send to content obtaining section 45.In addition, select indication obtaining section 43 also can only send to content obtaining section 45 to the title in the above-mentioned related information.
In addition, select indication obtaining section 43 also to be situated between, obtain the switching indication that the content that is just receiving is switched to other guide from user side by input part 34.The related information of corresponding content is indicated in the switching of selecting indication obtaining section 43 to read out and obtain from related information storage part 46, and sends to content obtaining section 45.In the present embodiment, selection indication obtaining section 43 need not to notify bandwidth notice portion 44 after having obtained above-mentioned switching indication.
Be specially, when content obtaining section 45 when bandwidth notice portion 44 receives above-mentioned setting end notification, just being situated between sends content transmission request by Department of Communication Force 33 grades to VoD server 12, and wherein, this content transmits request in order to 12 transmission and the corresponding content of above-mentioned title of request VoD server.Thus, VoD server 12 just begins to send the packet of the content of being asked.Content obtaining section 45 converts the above-mentioned packet that is received by Department of Communication Force 33 grades that is situated between to TV exportable vision signal, and the vision signal that will be situated between then after will being changed by efferent 35 sends to TV20, and thus, content is shown in TV20.
In addition, when in the way of content obtaining section 45 at received content when selecting indication obtaining section 43 newly to receive related information, just judge it is that content will be switched, and be situated between by Department of Communication Force 33 etc., to VoD server 12 send the contents request that transmits transmit with request VoD server 12 with should the new related information that receives in the corresponding content of title.Thus, VoD server 12 just begins to send the packet of new requested content.Content obtaining section 45 converts the packets of the content that receives from VoD server 12 to above-mentioned vision signal, and the vision signal that will be situated between then after will being changed by efferent 35 sends to TV20, and thus, new content is shown in TV20.
The following processing motion flow that a content biography system 11 with said structure is described with reference to Fig. 2 to Fig. 7.Fig. 5 is that the content of expression present embodiment passes the sequence chart of sending out the data flow that is transmitted in the system 11.Fig. 6 represents that content passes the flow chart of the handling process among the VoD server 12 of a system 11, PLC main frame 15, the STB17.
As shown in Figure 2, clearly, communicating by letter between VoD server 12 and the STB17 is to be situated between to be undertaken by NGN net 13, HGW14, PLC adapter 18a/18c, PLC network 16.On the other hand, communicating by letter between PLC main frame 15 and the STB17 is to be situated between to be undertaken by PLC adapter 18b/18c and PLC network 16.Below, for the purpose of simplifying the description, will omit about the explanation of the equipment that data carried out transfer.
As Fig. 5 and shown in Figure 6, at first, in STB 17, related information obtaining section 41 is situated between by the related information (step S10) of Department of Communication Force 33 to 12 contents that can provide of VoD server 12 request VoD servers.In addition, in the time of also can being switched at the power supply of STB17, or arrive regulation during the moment, or when the content of institute's audiovisual is switched (when the user has been switched content, or when moving to next content because of certain end of text) etc. carry out above-mentioned request, that is, can be to carry out above-mentioned request the opportunity of regulation automatically.Also can when having carried out indication by input part 34, user Jie carry out above-mentioned request.
On the other hand, when VoD server 12 when STB17 receives the request of related information of content, the related information (step S20) of 12 contents that can provide of VoD server just is provided to requesting party's STB17.At this moment, a plurality of if the content that can provide exists, the related information of those a plurality of contents is listed as being a tabulation and sends together.In addition, in can providing, have when a plurality of, also can draw up into several tabulations to the related information branch of those a plurality of contents, send those tabulations then successively.
On the other hand, in STB17, related information obtaining section 41 is situated between and is obtained the related information of the content of sending from VoD server 12 by Department of Communication Force 33, and this related information is deposited (storage) to related information storage part 46 (step S11).
In addition, as described above, VoD12 also can provide automatically with the opportunity of regulation its related information of the content that can provide.At this moment, the related information obtaining section 41 of STB17 is the request of the related information of deletia (step S10) just, the substitute is the state that can receive data that is in, thus, in case receive the related information of content from VoD server 12, just this related information be stored to related information storage part 46.
In addition, STB17 can continue to keep institute's correlation information stored in the related information storage part 46, till user's indication obtains the related information of content once more.At this moment, the user need not when wanting audio-visual content at every turn, and to VoD server 12 request and obtain above-mentioned related information, therefore, above-mentioned related information can be provided rapidly.
Then, the bandwidth determination section 42 of STB17 decides the bandwidth (step S12) that need guarantee in the PLC network 16 with reference to the related information of the content of storage in the related information storage part 46.Bandwidth determination section 42 the bandwidth deposits that is determined in decision bandwidth storage part 47.
Detailed process flow chart when Fig. 7 is the bandwidth determination section 42 above-mentioned bandwidth of decision (step S12).As shown in the figure, at first, the bandwidth B that need guarantee in the PLC network 16 is initialized as 0Mbps, and counter i is initialized as 1 (step S40).Then, compare,,, just the necessary bandwidth of content (i) is set to bandwidth B (step S42) if bigger with the necessary bandwidth of judging content (i) whether big (step S41) with above-mentioned bandwidth B.
At this, content (i) expression be, with i content among the corresponding content of correlation information stored in the related information storage part 46.At this, which content which to be in about is no special relationship.In the example of Fig. 4, content ABC correspondence content (1), and content DEF correspondence content (2), and content GHI correspondence content (3).
Secondly, judge whether to exist content (i+1), that is, judge with the corresponding related information of content (i+1) whether be stored in (step S43) in the related information storage part 46.If storage (being "Yes" in step S43) is arranged, just make counter i increase by 1 (step S44), return step S41 then and repeat above-mentioned action.On the other hand, if not storage (be "No" in step S44), just with current bandwidth B as the transmission bandwidth that need guarantee in the PLC network 16, and it be stored in determine bandwidth storage part 47 (step S45)., finish bandwidth decision processing, and return flow process originally thereafter.
Bandwidth decision shown in Figure 7 is handled and is equivalent to following processing,, selects maximum bit rate among the bit rate of 46 correlation information stored of related information storage part that is, and this maximum bit rate is stored in decision bandwidth storage part 47.In the example of Fig. 4, bit rate (necessary bandwidth) 15Mbps of content GHI is asked for the transmission bandwidth that need guarantee as in the PLC network 16.
Return Fig. 6.The related information obtaining section 41 of STB17 is situated between and by efferent 35 correlation information stored in the related information storage part 46 is exported to TV20, and makes TV20 show related information, by such processing, makes that the user can be with reference to above-mentioned related information.Then, the user selects to want the title of the content of audiovisual, and is situated between and is indicated by input part 34, and thus, (step S13) indicated in the selection of selecting indication obtaining section 43 to obtain content from user side.
At this moment, in order to guarantee to obtain and determine the corresponding transmission bandwidth of bit rate of storage in the bandwidth storage part 47 in PLC network 16, bandwidth notice portion 44 is situated between and by Department of Communication Force 33 this transmission bandwidth is notified to PLC main frame 15 (step S14).For example, if the related information of content shown in Figure 4, the transmission bandwidth of 15Mbps will be determined into the transmission bandwidth that need guarantee in the PLC network 16, even the user has selected content ABC, what be notified to PLC main frame 15 neither 10Mbps, but 15 couples of STB17 of notice PLC main frame guarantee the transmission bandwidth of 15Mbps.
In addition, also can be before the user select the content of the audiovisual of wanting, wide to PLC main frame 15 announcement carousel.That is, step S13 and step S14 can the exchange orders.
In PLC network 16, owing to be a plurality of data to be sent distribute bandwidth, so when guaranteeing that bandwidth is carried out the notice of transmission bandwidth (step S14), need be to the information of PLC main frame 15 notices in order to recognition data.Yet when content is selected, just obtain sometimes in order to the information of discerning these data.Specifically be equivalent to following situation, that is, the user as described above chosen content (step S13) just carry out the request (step S14) that bandwidth is guaranteed before.During this situation of picture, STB17 can't specifically specify when PLC main frame 15 is guaranteed bandwidth allocated bandwidth is carried out in which data transmission.
To this, during the above-mentioned situation of picture, when guaranteeing that bandwidth is carried out the notice of transmission bandwidth at first, STB17 earlier to PLC main frame 15 notices in order to discern the information of above-mentioned data, by the time content selected after, again in order to identification selecteed content information be notified to PLC main frame 15.
On the other hand, after PLC main frame 15 is received the notice of above-mentioned transmission bandwidth from STB17,, handle (step S30) Yi Bian carry out the setting of the transmission bandwidth in the PLC network 16 Yi Bian just begin to investigate the bandwidth settings situation of other equipment.Then, give requesting party's STB17 (step S31) with setting result notification.
On the other hand, in STB17, the setting result who is received from PLC main frame 15 by Department of Communication Force 33 represents to set successfully if bandwidth notice portion 44 is situated between, content obtaining section 45 just requires (content transmits and requires) to the audiovisual that is attached to the selected content of this user with the corresponding title of the selected content of user (identifying information), and sends these audiovisual requests (step S15) to VoD server 12.In addition, though not expression among Fig. 5 and Fig. 6, if above-mentioned setting result represents to set failure, content obtaining section 45 just makes TV20 demonstrate error message, and end process.
On the other hand, after VoD server 12 has received audiovisual request from STB17, just begin with this audiovisual request in the data of the corresponding content of title that contains send to requesting party's STB17 (step S21) with the form of packet.At this moment, STB17 just begins to receive the data (step S16) of foregoing.Thus, content obtaining section 45 becomes the exportable vision signal of TV to the data transaction of the data packet form of the contents that obtain, and is situated between and sends to TV20 by the vision signal of efferent 35 after conversion, so, foregoing just is shown in TV20 by playback, and the user just can the audiovisual foregoing.
Thereafter, establishing the user wants to switch to other guide and carries out audiovisual.At this moment, in STB17, related information obtaining section 41 is exported to TV20 to the related information of depositing in the related information storage part 46 according to the indication that the user is situated between and is imported by input part 34, and makes TV20 show associated data, points out related information with this to the user.Then, user's selection will be switched the title of the content of audiovisual, and Jie is indicated by input part 34.Thus, select indication obtaining section 43 to obtain and indicate (step S17) from user's switching to content.
At this moment, owing to guaranteed the transmission bandwidth of the necessity in the PLC network 16 by previous bandwidth notice (step S14), so bandwidth notice portion 44 need not to carry out once more the bandwidth notice.Then, S15 is same with step, 45 of content obtaining sections require (content transmits and requires) with the audiovisual that the corresponding title of the selected content of user (identifying information) is attached to the selected content of this user, and send these audiovisual requests (step S18) to VoD server 12.
On the other hand, after VoD server 12 receives audiovisual request from STB17, just begin with this audiovisual request in the data of the corresponding content of title that contains send to requesting party's STB17 (step S22) with the form of packet.At this moment, STB17 just begins to receive the data (step S19) of foregoing.Thus, content obtaining section 45 becomes the exportable vision signal of TV to the data transaction of the data packet form of the content that obtains, and Jie sends to TV20 to the vision signal after changing by efferent 35, so, content after the switching just is shown in TV20 by playback, the content of user after just can the above-mentioned switching of audiovisual.After, content whenever is switched once, just repeats the processing identical with step S17 to S19, S22.
In the example of related information shown in Figure 4, when the user reselects and switches to content DEF in the way of audio-visual content ABC, because the bandwidth of the 15Mbps that guaranteed of PLC main frame required 13Mbps during greater than audio-visual content DEF, so content obtaining section 45 can send the audiovisual request of content DEF at once to VoD server 12.
In addition, also can receive a plurality of contents sometimes, when therefore in PLC network 16, transmitting content, need to judge that earlier which content is the object that bandwidth is guaranteed, transmit again thereafter owing to be connected in the PLC adapter 18 of HGW14.Therefore, during when above-mentioned contents of object if by change,, also need to notify above-mentioned contents of object to be changed to PLC adapter 18 even the transmission bandwidth that need guarantee is enough big.
To this, after step S17, notify to PLC main frame 15 by bandwidth notice portion 44: become bandwidth and guarantee that the content of object is switched.At this moment, because the necessary bandwidth of the content after switching is guaranteed that therefore, the releasing of this bandwidth reaches to be guaranteed to be bound to successfully once more.
In the present embodiment, though all be VoD server 12 in order to the server that sends content with in order to the server of the related information that sends content, they also can be different separately servers.In addition, though but the content of a plurality of audiovisual all is stored in 1 VoD server 12, and those contents also can be separated to be stored in many VoD server 12.
As mentioned above, in the present embodiment, that provided and can be by among all the elements that STB17 reset from VoD server 12, the abundant bandwidth when receiving for the highest content of bit rate be guaranteed the transmission bandwidth that will use in the PLC network 16 in advance.Thus, even the switching of content takes place,, therefore need not when switch contents, to carry out once more bandwidth settings and handle owing to the necessary bandwidth of the content after switching is fully guaranteed.Below, the transmission bandwidth of above-mentioned maximum is called " fully bandwidth ".
In addition, when communicator 7 was the IP phone terminal, the user might be switched codec with the change call tone quality in the conversation way, or the conversation that only is altered to audio frequency and video with the conversation of audio frequency.
At this, suppose that the user will change tonequality, the kind of the codec that can be supported this moment with regard to the above-mentioned IP telephone terminal is guaranteed for maximum codec utilized bandwidth in advance.When switching codec, because by between sending side terminal and receiving side terminal, exchanging the encoding and decoding that this two side is supported, the encoding and decoding that just can only use this both to support.Therefore,, guarantee maximum bandwidth, just no longer need than this bigger bandwidth as long as the utilized bandwidth of the encoding and decoding of supporting from self terminal, so, when carrying out above-mentioned encoding and decoding, just need not to carry out once more bandwidth settings and handle.In addition, suppose to change over the Combination conversation of audio frequency and video, at this moment, can guarantee to obtain, audio bandwidth and video bandwidth are carried out the bandwidth of gained after the addition in advance from the conversation of audio frequency.
In addition, when PLC network 16 is used to the transmission of other data, the situation that PLC main frame 15 can't be guaranteed above-mentioned abundant bandwidth to STB17 might appear.At this moment, preferred 15 couples of STB17 of PLC main frame guarantee more bandwidth as much as possible.At this moment, the disorder that occurs in the time of can reducing playback of content as much as possible.In addition, when above-mentioned situation, preferred STB17 sends the bandwidth of whether having been guaranteed in order to the necessary bandwidth of representing each content to TV20 and guarantees state, and makes TV20 demonstration bandwidth guarantee state, notifies to the user with this.
Figure 30 and Figure 31 have represented to show the example when above-mentioned bandwidth is guaranteed state in TV20.In illustrated example, in step S13, make TV20 demonstrate the related information of content and when allowing user in selecting content with this, above-mentioned bandwidth guarantees that state is shown in TV20 with above-mentioned related information.
Be specially, in Figure 30 and Figure 31,, show thumbnail and title by each content as above-mentioned related information.In addition, illustrated blank arrow has been represented current just selecteed content.
In Figure 30, guarantee state as above-mentioned bandwidth, show mark " zero " and mark " * " by each content.Mark " zero " has represented that the necessary bandwidth of corresponding content is in the state of having been guaranteed, and mark " * " has represented that the necessary bandwidth of corresponding content is in the state of not guaranteed.The user knows just that by with reference to picture shown in Figure 30 the necessary bandwidth of the content of title 4 is not guaranteed.
In Figure 30, though represent that with mark " zero ", " * " above-mentioned bandwidth guarantees state, also can use other marks, maybe can use icon, color, " can "/literal such as "No".In addition, also can omit the column that above-mentioned bandwidth is guaranteed state, and represent that by text line, background colour and/or the housing look of title above-mentioned bandwidth guarantees state.For example,, guaranteed, just shown the text line of title with green as if necessary bandwidth about certain content; If necessary bandwidth is not guaranteed, just show the text line of title with redness.
In addition, housing look that also can be by thumbnail and/or all tones represent that above-mentioned bandwidth guarantees state.For example,, guaranteed, just thumbnail is all imposed translucent green, do not guaranteed, just thumbnail is all imposed translucent redness as if necessary bandwidth as if necessary bandwidth about certain content.So, can utilize arbitrarily information expressing method to represent that above-mentioned bandwidth guarantees state.
On the other hand, in Figure 31, above-mentioned bandwidth guarantees to show with bar-shaped figure in the status line necessary bandwidth and the current bandwidth of having been guaranteed of each content.Be specially, by showing the necessary bandwidth of each content by the horizontal bar shape figure that black square constituted side by side, and show the current bandwidth of having been guaranteed by the horizontal bar shape figure that is constituted by side by side square (white square).1 square among the figure and 1 black square have been represented the bandwidth of about 1Mbps.Therefore, in illustrated example, the bandwidth of being guaranteed is 7Mbps, with title 1 corresponding necessary bandwidth be 7Mbps.
The user just knows the necessary bandwidth of each content, and can learn whether the current bandwidth of having been guaranteed enough is used for this necessary bandwidth by with reference to picture shown in Figure 31.
About the bar-shaped figure of Figure 31, also can represent whether above-mentioned necessary bandwidth is guaranteed by the color of above-mentioned bar-shaped figure.For example, if above-mentioned necessary bandwidth guaranteed, just show by the horizontal bar shape figure that constitutes by side by side green square; If above-mentioned necessary bandwidth do not guaranteed, just show by the horizontal bar shape figure that constitutes by side by side red square.So, the user can rapidly learn just by the color with reference to above-mentioned horizontal bar shape figure whether above-mentioned necessary bandwidth is guaranteed.
In addition, about the bar-shaped figure of Figure 31, also can show above-mentioned necessary bandwidth and the current bandwidth of having been guaranteed together by 1 bar-shaped figure.At this moment, need not to guarantee the viewing area that shows in order to bar-shaped figure to the current bandwidth of having been guaranteed.
Example when Figure 32 (a) and Figure 32 (b) have represented to show above-mentioned necessary bandwidth and current bandwidth in guaranteeing together with a bar-shaped figure.In Figure 32 (a) and Figure 32 (b), epimere has partly been represented respectively: the current bandwidth of having been guaranteed enough is used for above-mentioned necessary bandwidth; Hypomere has partly been represented: the current bandwidth of having been guaranteed is not enough to be used for above-mentioned necessary bandwidth.
In Figure 32 (a),,, the square of the component of above-mentioned necessary bandwidth is become black square from the left side of this tetragonal arrangement in order to represent the tetragonal arrangement of the current bandwidth of having been guaranteed.About the component that exceeds from tetragonal arrangement, then additional blank " * " mark is arranged in the black square that exceeds.
On the other hand, in Figure 32 (b), compare Figure 32 (a), black square has become green square, and the black square that has blank " * " mark has become red square.In addition, in Figure 32 (b), green has been represented on a left side tiltedly hachure, and vertical hachure has been represented redness.Other figure also is same.
So, as the epimere part of Figure 32 (a) and Figure 32 (b), because tetragonal arrangement is arranged, therefore, the user can learn that the current bandwidth of having been guaranteed enough is used for above-mentioned necessary bandwidth.In addition, hypomere part as Figure 32 (a), if there is the black tetragonal arrangement that has blank " * " mark, or as the hypomere part of Figure 32 (b), if there is red tetragonal arrangement, just the user can learn easily that the current bandwidth of having been guaranteed is fewer than above-mentioned necessary bandwidth so.In addition, the user has the black tetragonal number of blank " * " mark by reference, or by with reference to red tetragonal number, just can learn not enough amount of bandwidth easily.
In addition, about display mode shown in Figure 30 and display mode shown in Figure 31, the user also can wait to input part 34 input indication informations, to switch this two display mode by remote controller.In addition, also can be in a part of zone of the video content that is just showing overlapping demonstration Figure 30 or image shown in Figure 31.At this moment, the user also can wait to input part 34 input indication informations, with the change overlapping areas by remote controller.
(execution mode 2)
Below, with reference to Fig. 8 to Figure 11 other execution modes of the present invention are described.Fig. 8 is that the content of present embodiment passes the structure skeleton diagram of sending out system 11.Pass a system 11 with Fig. 2 to content shown in Figure 7 and compare, content shown in Figure 8 passes the difference of sending out system 11 and is to be provided with IP broadcast server 50, multicast node 51, EPG server 52, replace VoD server 12 thus, and other structure is identical.About with above-mentioned execution mode in the structure of the structure identical function that illustrates, give its identical label, and omit its explanation.
Owing to is not VoD server 12 in order to the server that content is provided, but carries out the IP broadcast server 50 of IP broadcast, so content is passed the communicator of issuing one group simultaneously in the official hour band.Therefore, be not just audiovisual at once when thinking audio-visual content, but decide the biography of content to send out reservation chart by server side.This reservation chart provides in the mode of EPG.In the present embodiment, by each content, required bandwidth information is attached among the above-mentioned EPG during with the passing on of this content.
As shown in Figure 8, about the multicast that is carried out in the IP broadcast, the data of its content are not directly to transmit from IP broadcast server 50, but transmit via multicast node 51.Therefore, one group communicator is the data of coming received content from identical multicast node 51.In addition, in the present embodiment, in order to be provided with separately with IP broadcast server 50 at the EPG server 52 that interior EPG provides to comprising substantial related information.
Below, illustrate that with reference to Fig. 8 to Figure 11 the content with said structure passes the processing motion flow of sending out system 11.Fig. 9 is that the content of expression present embodiment passes the sequence chart of sending out the data flow that is transmitted in the system 11.Figure 10 is the flow chart that the expression content pass to be sent out the handling process of multicast node 51 in the system 11, EPG server 52, PLC main frame 15, STB17.
As shown in Figure 8, clearly, communicating by letter between multicast node 51 and the STB17 is to be situated between to be undertaken by NGN net 13, HGW14, PLC adapter 18a/18c, PLC network 16.On the other hand, communicating by letter between PLC main frame 15 and the STB17 is to be situated between to be undertaken by PLC adapter 18b/18c and PLC network 16.Below, for the purpose of simplifying the description, will omit about data being carried out the explanation of the equipment of transfer.
As Fig. 9 and shown in Figure 10, at first, in STB17, related information obtaining section 41 is situated between and asks EPG by Department of Communication Force 33 to EPG server 52, and this EPG contains the related information (step S50) that IP broadcast server 50 is scheduled to pass the content of sending out.In addition, in the time of can being switched at the power supply of STB17, or arrive regulation during the moment, or when the content of institute's audiovisual is switched (when the user has been switched content, or when moving to next content because of certain end of text) etc. carry out above-mentioned request, that is, can be to carry out above-mentioned request the opportunity of regulation automatically.Or, also can when sending indication by input part 34, user Jie carry out above-mentioned request.
On the other hand, when EPG server 52 when STB17 has received the request of EPG, just wherein containing the STB17 (step S70) that the predetermined EPG that will pass the related information of the content of sending out sends to the requesting party.In this EPG, by each program, except containing channel, program title title, the programming time that is comprised among the general EPG, the bandwidth information that also contains program is a bit rate.This bit rate is that compress mode, compression ratio with content etc. changes.
Figure 11 is to represent the key diagram of above-mentioned EPG example with sheet form.As shown in the figure, in channel CH1,8: 00 to 9: 00 program (content) AAA broadcasts with the bit rate of 5Mbps, and thereafter, 9: 00 to 9: 15 program BBB broadcasts with the bit rate of 10Mbps.In addition, in channel CH2,8: 30 to 11: 00 program GGG broadcasts with the bit rate of 9Mbps, and in channel CH3,10: 10 to 11: 00 program JJJ broadcasts with the bit rate of 7Mbps.About other columns among Figure 11 also is same, therefore omits their explanation.The numerical value of illustrated bit rate is for convenience of description and sets, but in fact the numerical value of bit rate is that compress mode, compression ratio with broadcasted content decided.
Get back to Fig. 9 and Figure 10, in STB17, related information obtaining section 41 is situated between and obtains the EPG that sends over from IP broadcast server 50 by Department of Communication Force 33, and this EPG is deposited (storage) in related information storage part 46 (step S51).
In addition, as described above, EPG server 52 can initiatively send above-mentioned EPG with the opportunity of regulation.At this moment, the related information obtaining section 41 of STB17 always is in data receiving state, with this request action (step S50) that replaces EPG, when related information obtaining section 41 has received above-mentioned EPG from EPG server 52, just above-mentioned EPG is deposited to related information storage part 46.
In addition, STB17 also can continue to keep the EPG that is stored in the related information storage part 46, till user's indication obtains the related information of content once more.At this moment, the user need not to ask and obtain above-mentioned EPG to EPG server 52 when wanting audio-visual content at every turn, and therefore above-mentioned EPG can be provided rapidly.
Then, the bandwidth determination section 42 of STB17 decides the bandwidth (step S52) that need guarantee in the PLC network 16 with reference to the EPG of storage in the related information storage part 46.Bandwidth determination section 42 is stored in decision bandwidth storage part 47 to the bandwidth that is determined.
In addition, to handle (step S52) identical with bandwidth decision processing shown in Figure 7 for the bandwidth decision carried out of bandwidth determination section 42.Promptly, bandwidth decision in the present embodiment is handled among the bit rate that is equivalent to from all related informations that EPG comprised of related information storage part 46 storages, select maximum bit rate, and bit rate that should maximum is stored in this processing of decision bandwidth storage part 47.
In other words, pass all the elements (content that comprises all channels) of sending out the transmission bandwidth that the enough bandwidth when the highest content of bit rate is received are guaranteed as need from IP broadcast server 50 predetermined will being with in all contained airtimes of EPG.In the example of Figure 11, the bit rate 15Mbps of content CCC is asked for the transmission bandwidth that need guarantee as in the PLC network 16.
Then, the related information obtaining section 41 of STB17 is situated between by the EPG of efferent 35 storage in TV20 output related information storage part 46, and makes TV20 show EPG, makes the user with reference to above-mentioned EPG by such processing.Then, the user selects to want the title or the channel of the content of audiovisual, and is situated between and is indicated by input part 34, thus, selects indication obtaining section 43 to obtain the selection indication (step S53) to content from the user.
At this moment, bandwidth notice portion 44 notifies above-mentioned transmission bandwidth (step S54) by Department of Communication Force 33 to PLC main frame 15 in order to guarantee to obtain and determine the corresponding transmission bandwidth of bit rate of storage in the bandwidth storage part 47 in PLC network 16, to be situated between.For example, in EPG shown in Figure 11, because the transmission bandwidth of 15Mbps is determined into the transmission bandwidth that need guarantee in the PLC network 16, therefore, even the user in 8: 00 component selections content AAA, what be notified to PLC main frame 15 neither 5Mbps, but 15 couples of STB17 of notice PLC main frame guarantee the transmission bandwidth of 15Mbps.
In addition, also can be before the user select the content of the audiovisual of wanting, wide to PLC main frame 15 announcement carousel.That is, step S53 and the interchangeable order of step S54.
On the other hand, after PLC main frame 15 is received the notice of above-mentioned transmission bandwidth from STB17,, handle (step S80) Yi Bian carry out the setting of the transmission bandwidth in the PLC network 16 Yi Bian just begin to investigate the bandwidth settings situation of other equipment.Then, this is set the STB17 (step S81) that result notification is given the requesting party.
On the other hand, in STB17, the setting result who is received from PLC main frame 15 by Department of Communication Force 33 is that expression is set successfully if bandwidth notice portion 44 is situated between, and just sends the audiovisual request to multicast node 51, wherein, the information in order to the selected content of identification user is arranged is channel by additional for this audiovisual request.Be specially, content obtaining section 45 in the adding packet that begins of audiovisual, add in order to the notice foregoing with will the corresponding multicast address of received channel, then the adding packet that is added with this multicast address is sent to multicast node 51 (step S55).In addition, though do not show among Fig. 9 and Figure 10, if above-mentioned setting result represents to set failure, content obtaining section 45 just makes TV20 demonstrate error message, and end process.
After multicast node 51 received adding packet from STB17, just the multicast that the STB17 of transmit leg is appended to foregoing passed and sends out in the destination (step S71).Thus, the data of foregoing are just sent to STB17 from multicast node 51 by biography with the form of packet.
On the other hand, STB17 begins to receive the data (step S56) of foregoing.Thus, content obtaining section 45 becomes the exportable vision signal of TV to the data transaction of the data packet form of the contents that obtain, and is situated between to be passed by the vision signal of efferent 35 after conversion and issues TV20, so, foregoing just is shown in TV20 by playback, and the user just can the audiovisual foregoing.Like this, recipient's communicator is the bandwidth information of STB17 according to obtained EPG, be predetermined out bandwidth, and 15 pairs of these bandwidth of PLC main frame is guaranteed, communicates with this.
Thereafter, establishing the user will switch to other guide and carry out audiovisual.At this moment, in STB17, the indication that related information obtaining section 41 is situated between and is imported by input part 34 according to the user is exported to TV20 to the EPG of storage in the related information storage part 46, and makes TV20 show EPG, points out EPG with this to the user.Then, the user selects to want to switch the title of content of audiovisual or channel etc., and is situated between and is indicated by input part 34.Thus, select indication obtaining section 43 to obtain and indicate (step S57) from user's switching to content.
In addition, also can not show EPG, and carry out the channel handover operation with the order of predesignating.For example can be following method of operation, that is, when audiovisual channel CH2, channel CH2 be switched to channel CH3, or channel CH2 is switched to channel CH1 by pressing " button " by "+the button " of pressing remote controller.
At this moment, owing to guaranteed the transmission bandwidth of the necessity in the PLC network 16 by previous bandwidth notice (step S54), therefore, bandwidth notice portion 44 need not to carry out once more the bandwidth notice.On the other hand, the audiovisual end notification that the content obtaining section 45 of STB17 will be attached channel sends to multicast node 51, and wherein, described channel is the information that will finish the content of audiovisual in order to identification.Be specially, 45 of content obtaining sections and the corresponding multicast address of the channel that will finish to receive join withdrawing from the packet that audiovisual in order to content of announcement finishes, and this is withdrawed from packet send to multicast node 51 (step S55).Then, S55 is same with step, and the adding packet that content obtaining section 45 will begin in order to the audiovisual of notifying the new content of selecting of user sends to multicast node 51 (step S59).
On the other hand, multicast node 51 received from STB17 withdraw from packet after, just eliminate (step S72) the destination passing to send out from the multicast of foregoing as the STB17 that withdraws from the packet transmit leg.Then, after multicast node 51 had received adding packet from STB17, just the multicast that the STB17 of transmit leg is joined new selecteed foregoing passed and sends out in the destination (step S73).So, the data of foregoing are just sent to STB17 with the form of packet from multicast node 51 biographies.
On the other hand, STB17 begins to receive the data (step S60) of foregoing.Thus, content obtaining section 45 becomes the exportable vision signal of TV to the data transaction of the data packet form of obtained content, and Jie sends to TV20 to the vision signal after changing by efferent 35, so, content after the above-mentioned switching is shown in TV20 by playback, the content of user after just can the above-mentioned switching of audiovisual.After, content whenever is switched once, just repeats and step S57 to S60, S72, processing that S73 is identical.
For example, in EPG shown in Figure 11, when the user reselects and switches to content FFF in the way of audio-visual content AAA, because the bandwidth of the 15Mbps that guaranteed of PLC main frame desired 13Mbps during greater than audio-visual content FFF, so content obtaining section 45 can begin to the audiovisual end of multicast node 51 content of announcement AAA and the audiovisual of content FFF at once.In addition, as mentioned above, bandwidth notice portion 44 also can switch to as the content of guaranteeing the object of bandwidth to PLC main frame 15 notices after step S57.
As mentioned above, in the present embodiment, in advance necessary bandwidth maximum among the necessary bandwidth of the contained all the elements of EPG (fully bandwidth) is guaranteed into the transmission bandwidth that will use in the PLC network 16.So, even the switching of content takes place, owing to the necessary bandwidth of the content after switching is fully guaranteed, so, when content is switched, need not to carry out once more bandwidth settings and handle.In addition, after having obtained EPG, the bandwidth of only once guaranteeing PLC network 16 just can, therefore, can alleviate the burden of PLC main frame 15.
In the present embodiment, though be with among the EPG all the elements of free broadcasting be that object is selected maximum necessary bandwidth (fully bandwidth), also can bring to limit with regard to the airtime of contents of object.For example, contain the related information of all the elements that will broadcast at the time of a few days from now on band among the general EPG, therefore, also can from the content of those times, select maximum necessary bandwidth (fully bandwidth) with upcoming broadcasting.In addition, also can be defined as shorter time band (for example 6 hours).At this moment, the time band that is limited preferably includes current time at interior time band (the 1st time band).
For example, in the EPG of Figure 11, can be that object decides abundant bandwidth only with the predetermined content that will broadcast of 8: 00 to 9: 00 this time band.At this moment, contents of object be respectively AAA, FFF, III, GGG this, therefore, the bit rate 13Mbps of content FFF just is decided to be abundant bandwidth.
In addition, preferably the content that finishes to broadcast is got rid of from above-mentioned object.In above-mentioned example, if current time is 8: 30, the content FFF that has finished so to broadcast just rejects from above-mentioned object, so the bit rate 9Mbps of content GGG is just determined into abundant bandwidth.
Or also can be defined as time band (the 1st time band) from specified time limit of current time.For example, in the EPG of Figure 11, establishing current time is 10: 15, can be that object decides abundant bandwidth with the content that will broadcast in after 10: 15 60 minutes so.At this moment, contents of object be respectively DDD, GGG, JJJ, EEE, HHH, KKK this, so the bit rate 12Mbps of content EEE is just determined into abundant bandwidth.
In addition, as described above, might there be signatory channel that can't audiovisual because of the user.At this moment, channel that preferably can't audiovisual is removed from object.In above-mentioned example, if channel CH1 can't audiovisual, the content DDD of channel CH1, EEE just can get rid of from object, and the bit rate 11Mbps of content KKK is just determined into abundant bandwidth.
In addition, if STB17 can receive IP broadcast and VoD broadcasting simultaneously, among the content that the content of all IP broadcasts that can receive from institute and all VoD that can receive broadcast, determine the necessary bandwidth of maximum and guarantee this bandwidth.Content about VoD receives the order of serving, and explains to execution mode shown in Figure 7 at Fig. 1.At this moment, even the user in the way of audiovisual IP broadcast and operation change becomes VoD broadcasting (that is, when the service of reception is changed), also need not to carry out once more bandwidth settings and handles.Therefore, so long as can obtain the service that the tabulation of content also can make user's chosen content from tabulation, the present invention receives service applicable to any content.In addition, when the content reception service that receives more than 3, it also is same.
In addition, because of the difference of service, the bit rate upper limit of the content that is provided is defined sometimes.For example, when the specification of bit rate with IP broadcast is defined in limited time (promptly, learning at any channel during in advance) any time with the content that can not provide above certain bit rate, even do not obtain bandwidth information according to EPG, as long as guarantee the bandwidth of the bit rate upper limit, just can access the effect identical with present embodiment.But guaranteeing upper limit speed if only transmit the content that is lower than upper limit speed, because the actual bandwidth of using is lower than the bandwidth of being distributed, so the service efficiency of bandwidth is just not good always.
(execution mode 3)
Below, with reference to Figure 12 to Figure 15, Figure 33 to Figure 37 another embodiment of the present invention is described.Passing a system 11 with Fig. 8 to content shown in Figure 11 compares, the content of present embodiment passes the function difference that the difference of sending out system 11 only is bandwidth determination section 42 and bandwidth notice portion 44, the data structure difference of decision bandwidth storage part 47, other structures are same.About with the structure described in the above-mentioned execution mode and handle identical structure and processing, give its identical label, and omit its explanation.
In the present embodiment, bandwidth determination section 42 passes all the elements of sending out and decides abundant bandwidth with regard to predetermined will the quarter at a time, and makes the abundant bandwidth and the above-mentioned moment that are determined be stored to decision bandwidth storage part 47 accordingly.In other moment about comprising among the EPG, also repeat above same processing.
When the moment that the abundant bandwidth of storing in the decision bandwidth storage part 47 changes arrived, bandwidth notice portion 44 just was situated between by the abundant bandwidth of Department of Communication Force 33 after PLC main frame 15 notices change.So, can prevent from vainly to guarantee the bandwidth of PLC network 16.
Below, illustrate that with reference to Figure 12 to Figure 15 the content with said structure passes the processing motion flow of sending out system 11.Figure 12 is that the content of expression present embodiment passes the sequence chart of sending out the data flow that is transmitted in the system 11.In addition, Figure 13 is the flow chart that the expression content passes the handling process among the STB17 that sends out system 11.In addition, the processing of the multicast node 51 in the content biography system 11, EPG server 52, PLC main frame 15 is identical with processing shown in Figure 10, so omit explanation.
As Figure 12 and shown in Figure 13, at first, same with Fig. 9 and Figure 10, the related information obtaining section 41 of STB17 is situated between and asks and obtain EPG by Department of Communication Force 33 to EPG server 52, this EPG contains the related information that IP broadcast server 50 is scheduled to pass the content of sending out, and the EPG that obtains is deposited (storage) to related information storage part 46 (step S50, S51).
Then, the bandwidth determination section 42 of STB17 is with reference to the EPG of storage in the related information storage part 46, and guarantees certain transmission bandwidth constantly, that need guarantee in the PLC network 16, and with regard to comprise among the EPG other constantly, also repeat above processing (step S90).Bandwidth determination section 42 makes the above-mentioned moment and the bandwidth that determined is corresponding relation, and both deposit to decision bandwidth storage part 47 with this accordingly.
Figure 14 is the above-mentioned EPG of expression and according to the key diagram of the sheet form example of the abundant bandwidth that this EPG determined.The left side of figure records the EPG of storage in the related information storage part 46, and the right side of figure records the above-mentioned transmission bandwidth of storage in the decision bandwidth storage part 47.EPG shown in Figure 14 is identical with EPG shown in Figure 11, so omit its explanation.
In the example of Figure 14, pairing abundant bandwidth (maximum of necessary bandwidth) is as follows respectively constantly for each, that is, the 8: 00 abundant bandwidth to 8: 30 this section intervals is the bit rate 13Mbps of program FFF; 8: 30 to 9: 00 this section intervals and the 10: 00 abundant bandwidth to 11: 00 this section interval are the bit rate 9Mbps of program GGG; The 9: 00 abundant bandwidth to 9: 15 this section intervals is the bit rate 10Mbps of program BBB; The 9: 15 abundant bandwidth to 10: 00 this section interval are the bit rate 15Mbps of program CCC; The 11: 00 abundant bandwidth to 12: 00 this section interval is the bit rate 12Mbps of program EEE.Those time bands and abundant bandwidth have been endowed corresponding relation, and are stored in decision bandwidth storage part 47.About the decision that 42 pairs of abundant bandwidth of bandwidth determination section are carried out, its after EPG is obtained, carry out once just can, need not to carry out once more when being switched in that program is actual.
The detail flowchart of the processing (step 90) when Figure 15 is the above-mentioned transmission bandwidth of bandwidth determination section 42 decision.As shown in the figure, t furnishing is constantly passed the time of sending out in the contained all the elements of EPG and send out the t0 zero hour (step S 100) for the biography of the earliest content.In the example of Figure 14, t0 is 8: 00.Then, channel number i (being designated hereinafter simply as " channel i ") is set at 1 (step S101).At this, establishing the content that contains among the EPG is the content of distributing numbering channel since 1 integer.
Then, judge constantly whether to have arrived content by t (i, biography u) is sent out the u zero hour (step S102).At this, content (i, u) represented among the channel i, pass the content of sending out since moment u.
If (i, biography u) is sent out the u zero hour (being "No" in step S102), judges that just whether channel i is the last channel number (step S103) among the EPG the content of t no show constantly.If not last channel number (being "No" in step S103) just makes channel i increase by 1 (step S104), thereafter, return step S102 and repeat above-mentioned action.On the other hand, if last channel number (being "Yes") arrives and passes the content of sending out the u zero hour and do not exist just be judged as constantly t, advance to step S106 then in step S103.
On the other hand, if t has arrived content (i constantly, u) biography is sent out the zero hour (being "Yes" in step S102), the maximum of the necessary bandwidth when just determining this moment t, abundant bandwidth B (t), and to moment t and fully bandwidth B (t) give corresponding relation, deposit then to decision bandwidth storage part 47 (step S105).Advance to step S106 thereafter.In addition, the processing of step S105 is identical with processing shown in Figure 7.
In step S106, t advances with the official hour amount constantly.This official hour amount can be the least unit of time of putting down in writing among the EPG, is generally 1 minute.Secondly, judge whether t has arrived the last moment (step S107) contained among the EPG constantly.If constantly the t above-mentioned last moment of no show (being "No" in step S107), just return step S101 and repeat above-mentioned processing action.On the other hand, if t has arrived the above-mentioned last moment (being "Yes" in step S107) constantly, the wide decision of constipation band is handled, and turns back to flow process originally.
Promptly, handle in (step S100 is to step S107) in bandwidth decision shown in Figure 15, by reference EPG, by each the switching instant t that passes the content of sending out in certain channel, determine and the corresponding abundant bandwidth B (t) of this moment t, and abundant bandwidth B (t) is deposited in decision bandwidth storage part 47.
For example, in EPG shown in Figure 14, at first, and 00 timesharing when moment t=8, owing to the biography that is the program AAA of channel i=1 is at this moment sent out the time started, therefore, the abundant bandwidth B (t) of 00 timesharing in the time of will asking for moment t=8.In the program of pass sending out in 8: 00, the necessary bandwidth maximum be program FFF, therefore, its bit rate 13Mbps just becomes abundant bandwidth B (t).
Then, t advances constantly, 30 timesharing when it arrives t=8, and owing to the biography that is the program GGG of channel i=2 is at this moment sent out the time started, therefore, the abundant bandwidth B (t) of 30 timesharing in the time of will asking for moment t=8.In the program of pass sending out in 8: 30, the necessary bandwidth maximum be program GGG, therefore, its bit rate 9Mbps just becomes abundant bandwidth B (t).
Then, t advances constantly, 00 timesharing when it arrives t=9, and owing to the biography that is the program BBB of channel i=1 is at this moment sent out the time started, therefore, the abundant bandwidth B (t) of 00 timesharing in the time of will asking for moment t=9.In the program of pass sending out in 9: 00, the necessary bandwidth maximum be program BBB, so its bit rate 10Mbps just becomes abundant bandwidth B (t).Below, the maximum of the necessary bandwidth when similarly asking for moment t=12 till 00 minute (fully bandwidth) B (t).
Get back to Figure 12 and Figure 13.As mentioned above, the selection indication obtaining section 43 of STB17 has obtained the switching indication back (step S53) to content from the user, bandwidth notice portion 44 just reads out the abundant bandwidth of current time from decision bandwidth storage part 47, and Jie should abundant bandwidth be notified to PLC main frame 15 (step S54) by Department of Communication Force 33.Thus, in PLC network 16, guarantee above-mentioned abundant bandwidth.
In the example of Figure 14, if the user in 8: 00 component selections channel CH1, at first, with reference to decision bandwidth storage part 47, derive the abundant bandwidth 13Mbps of required that guarantee in advance, PLC network 16 in 8: 00 to 8: 30 the band during this period of time, and be notified to PLC main frame 15, and then set the bandwidth in the PLC network 16.This setting only exists with ... the moment and the abundant bandwidth of storage in the decision bandwidth storage part 47, and it does not exist with ... the content that the user wants which channel of audiovisual.Thereafter, the adding packet in order to beginning audio-visual content AAA is sent to multicast node 51, the reception of beginning content AAA in STB17 thus.
During a certain person when satisfy following 3 conditions (step S91, S92, S92) in, carry out and this condition corresponding processing thereafter.
Promptly, with reference to the moment that is corresponding relation in the decision bandwidth storage part 47 and abundant bandwidth, (be "Yes" in step S96) when the moment that the bandwidth that need guarantee in the PLC network 16 can change arrives, bandwidth notice portion 44 just notifies new abundant bandwidth (step S97) to PLC main frame 15.In the example of Figure 14, when from 8 the time 00 minute during with channel CH3 audio-visual content III, because in 8: 30 timesharing, the abundant bandwidth of storage can become 9Mbps from 13Mbps in the decision bandwidth storage part 47, therefore, bandwidth notice portion 44 can set the transmission bandwidth in the PLC network 16 for 9Mbps at 8: 30 timesharing notice PLC main frame 15.
On the other hand, if the user sends the switching indication (being "Yes" in step S92) of channel, the content obtaining section 45 of STB17 just sends out in order to what the content of announcement audiovisual finished to multicast node 51 and withdraws from packet (step S93).After multicast node 51 has been received and withdrawed from packet, just STB17 is sent out the destination from the multicast biography of foregoing and eliminate.Thus, from the transmission constipation bundle of multicast node 51 to the foregoing of STB17.
Then, the content obtaining section 45 of STB17 sends out the adding packet (step S94) that begins in order to the audiovisual of notifying new chosen content to multicast node 51.After multicast node 51 is received and added packet, just STB17 is appended in the multicast biography destination of foregoing.Thus, multicast node 51 beginnings transmit new content to STB17, and the content obtaining section 45 of STB17 just begins to receive the data (step S95) of new content.
In the example of Figure 14, the user when the content AAA of 8: 00 to 8: 30 audiovisual channel CH1 if channel is switched to channel CH3, withdraw from packet and can at first be sent to multicast node 51 in order to what notice foregoing audiovisual finished, then, the adding packet that begins in order to the audiovisual of the content III of notification channel CH3 can be sent to multicast node 51.Thus, the reception of beginning content III in STB17.At this moment, need not to change the bandwidth that to guarantee to 15 requests of PLC main frame.In addition, between step S93 and step S94, also can be notified to PLC main frame 15 by bandwidth notice portion 44: the content that becomes the object of guaranteeing bandwidth has become III from AAA.
In addition, the content changing of audiovisual is become the content of (VoD etc.) beyond the IP broadcast because of the user, or close the power supply of TV20, or the input of carrying out TV20 is switched (for example the demonstration of TV20 being switched to game machine from STB17) and when being judged as the audiovisual (being "Yes" among step S91) of the IP broadcast content that is through with, the content obtaining section 45 of STB17 just is sent to multicast node 51 (step S98) to the packet that withdraws from that finishes in order to the content of announcement audiovisual.After multicast node 51 has been received and withdrawed from packet, just STB17 is sent out the destination from the biography of foregoing and eliminate.Thus, from the transmission constipation bundle of multicast node 51 to the foregoing of STB17.
In addition, the bandwidth notice portion 44 of STB17 also notifies PLC main frame 15 to discharge the bandwidth (step S99) that STB17 is guaranteed in PLC16.Thereafter end process.In addition, the user is the audiovisual IP broadcast once more, so STB17 also can not notify the release of bandwidth, and continues to guarantee bandwidth.At this moment, can judge when specified time limit, (for example about 1 hour) user was not at the audiovisual IP broadcast, discharge bandwidth again at STB17.About judging the user not in the method for audiovisual above-mentioned IP broadcasting, for example, detect the user not to STB17 or TV20 operate (for example, use a teleswitch and carry out the operation of channel alteration or volume change) during whether passed through the stipulated time.Or, detect the user whether near STB17 or TV20 installing video camera or sensing device on STB17 or the TV20, thus detect the user not during whether passed through the stipulated time.
In the present embodiment, when the moment of storage in the decision bandwidth storage part 47 arrives, just set the bandwidth that need guarantee in the PLC network 16 again, but in content audiovisual way, if variation has taken place the content that the institute of certain channel in all channels can audiovisual, also can carry out above-mentioned setting again.For example, when causing EPG to change, just need carry out above-mentioned setting again because of urgent broadcast or broadcasting prolongation etc.When receiving EPG, whether as long as compare with the EPG that last time receives, just can judge needs to set again.
In addition, in the present embodiment, bandwidth determination section 42 is predetermined each pairing abundant bandwidth constantly, but also can continuously determine the pairing abundant bandwidth of current time.That is, in the cycle (for example 0.1 second) that bandwidth determination section 42 can be in accordance with regulations, decide abundant bandwidth with regard to current all the elements of broadcasting, and the abundant bandwidth that is determined is stored in decision bandwidth storage part 47.At this moment, bandwidth notice portion 44 judges with the cycle of afore mentioned rules whether the abundant bandwidth of storage in the decision bandwidth storage part 47 than the current bandwidth of guaranteeing in the PLC network 16 variation has taken place.If variation has taken place, can be situated between is notified to PLC main frame 15 to the abundant bandwidth after changing by Department of Communication Force 33.
When above-mentioned situation, indication comes switch contents even the user sends the channel switching, owing to the bandwidth of having guaranteed to be enough to be used in transmitting, so, need not to ask PLC main frame 15 to change the bandwidth of being guaranteed.In addition, bandwidth determination section 42 need not to make the abundant bandwidth of decision and the moment to be corresponding relation.In addition, the bandwidth of carrying out in advance before audiovisual decision is handled in (step S90), need not to determine other the abundant bandwidth constantly except that current time, so audio-visual content promptly.
In the process of switching channels, the two transmits content before switching and the content after the switching in PLC network 16 sometimes simultaneously.To this, bandwidth determination section 42 can will be carved among the bit rate that passes all the elements of sending out at a time from predetermined, and the bit rate of maximum is determined into abundant bandwidth with the additive quantity that second largest bit rate addition obtains.For example, in the EPG of Figure 14, can be the abundant bandwidth settings of 8: 00 to 8: 30 this time band 13+8=21Mbps.At this moment, can not stagnate and receive to switch reliably before content and switch after content.
In addition, in the example of Figure 14, the bandwidth that will guarantee in the PLC network 16 can be configured to 13Mbps in 8: 00 timesharing, thereafter, be changed into 9Mbps in 8: 30 timesharing meetings, be changed into 10Mbps, be changed into 15Mbps in 9: 15 timesharing meetings in 9: 00 timesharing meetings.At this moment, might be because of having guaranteed to be useful on the bandwidth that transmits other data in the PLC network 16, and cause can't guaranteeing to obtain the bandwidth of 15Mbps in 9: 15 timesharing.
To this, when the bandwidth of guaranteeing when need will reduce, bandwidth determination section 42 can not carry out the request of bandwidth settings.When this situation, till 8: 00 to 9: 15, the bandwidth that need guarantee just is 13Mbps.
In addition, replacement is altered to this processing of the abundant bandwidth of next time band (the 2nd time band) from the abundant bandwidth of current time band (the 1st time band), bandwidth is altered to the current time is with the maximum among (the 2nd time band) pairing abundant bandwidth with the later time.
In addition, as mentioned above, the situation that PLC main frame 15 can't be guaranteed above-mentioned abundant bandwidth for STB17 might appear.At this moment, preferred STB17 guarantees that with above-mentioned bandwidth state sends to TV20 to show, notifies to the user thus.
Figure 33 represented, in TV20 above-mentioned bandwidth guaranteed that state overlaps the example when showing on a part of zone of the video content that is just showing.In illustrated example, in order to show zone that above-mentioned bandwidth guarantees state promptly, bandwidth guarantees that status display area 60 is located at the upper right quarter of video content, but also can be located at the optional position of video content, or also can be arranged at the optional position of display frame.In addition, the user also can wait to input part 34 input indication informations by remote controller, guarantees status display area 60 thereby change bandwidth.
Figure 34 (a) has represented that to Figure 34 (c) bandwidth guarantees that the above-mentioned bandwidth that is shown in the status display area 60 guarantees the example of state.In illustrated example, by each channel, represent that with mark " zero " and mark " * " above-mentioned bandwidth guarantees state.At this, mark " zero " has represented that the necessary bandwidth of the content broadcasted in the corresponding channel is in the state of having been guaranteed, and mark " * " has represented that the necessary bandwidth of foregoing is in the state of not guaranteed.Therefore, the user by with reference to Figure 34 (a) to the image shown in Figure 34 (c), just can learn the necessary bandwidth of not guaranteed the content broadcasted in which channel.
In Figure 34 (a), show the two bandwidth of the channel of positive audiovisual and other channels and guarantee state.In addition, in illustrated example, except the channel in the audiovisual, if at least 1 necessary bandwidth is not guaranteed in the content of just broadcasting in other channels, just represent with mark " * ", guaranteed, just represent with mark " zero " as if all necessary bandwidths of this content.Therefore, the user just can learn if switching channels just might get muddled in the content of resetting by with reference to the image shown in Figure 34 (a).
In addition, in Figure 34 (b), show the channel of positive audiovisual and guarantee state adjacent to this bandwidth of the channel before and after it.Illustrated embodiment be suitable for the user with remote controller etc. go up (up) button and down (down) button carry out channel and switch.
At this moment, also can skip the channel of not guaranteed necessary bandwidth.For example, in Figure 34 (b), establishing the current channel that is in the demonstration is channel 3, and this moment, channel 2 was its channels before so.In addition, the necessary bandwidth of also establishing channel 1 is guaranteed.In this case, if press above-mentioned down button, though generally can demonstrate the video of channel 2 since as shown in the figure like that the necessary bandwidth of channel 2 do not guaranteed, so channel 2 can be skipped, and demonstrate the video of channel 1.
In Figure 34 (c), show with the above-mentioned bandwidth of all channels and guarantee state.In addition, in the figure, the channel of positive audiovisual is had mark "＞".Illustrated embodiment is suitable for the user and carries out channel with the numerical key of remote controller etc. and switch.About not guaranteed the channel of bandwidth, also can not be presented in the illustrated tabulation.
To Figure 34 (c),, also can use other marks at Figure 34 (a) though use mark " zero ", " * " to represent that above-mentioned bandwidth guarantees state, maybe can use icon, color, " can "/literal such as "No".In addition, also can omit the column that above-mentioned bandwidth is guaranteed state, but in the column (current channel, last channel, channel 1 etc.) of the text line that contains " channel ", represent that with this text line and/or background colour above-mentioned bandwidth guarantees state.For example, the channel for the necessary bandwidth of the content of just broadcasting obtains guaranteeing shows above-mentioned text line with green; For the channel of not guaranteed above-mentioned necessary bandwidth, show above-mentioned text line with redness.So, can utilize arbitrarily information expressing method to show that above-mentioned bandwidth guarantees state.
Figure 35 (a) has represented that to Figure 35 (c) bandwidth guarantees that above-mentioned bandwidth shown in the status display area 60 guarantees other examples of state.In illustrated example, guarantee state about above-mentioned bandwidth, show current bandwidth in guaranteeing with bar-shaped figure; By each channel, show the necessary bandwidth of the content of just broadcasting with bar-shaped figure.Be specially, by show current bandwidth in guaranteeing by side by side the horizontal bar shape figure that square constituted; By show the necessary bandwidth of the content of broadcasting by the horizontal bar shape figure that black square constituted side by side.1 square among the figure and 1 black square have been represented the bandwidth of about 1Mbps.Therefore, in the example of Figure 35 (a), the bandwidth of being guaranteed is 7Mbps, and the necessary bandwidth of current channel is 7Mbps.
The user by with reference to Figure 35 (a) to the image shown in Figure 35 (c), just can learn the necessary bandwidth of the content of broadcasting, and can learn whether the current bandwidth of having been guaranteed enough is used for this necessary bandwidth.
In Figure 35 (a), show the two necessary bandwidth of the channel of positive audiovisual and other channels.In addition, in illustrated example, show the maximum necessary bandwidth among the necessary bandwidth of the content that other channels except that the channel of positive audiovisual are broadcasting.Therefore, the user just can learn if switching channels just might get muddled in the content of resetting by with reference to the image shown in Figure 35 (a).
In addition, in Figure 35 (b), show the channel of positive audiovisual and adjacent to this necessary bandwidth of the channel before and after it.Illustrated embodiment be suitable for the user with remote controller etc. go up (up) button and down (down) button carry out channel and switch.
At this moment, also can skip the channel of not guaranteed necessary bandwidth.For example, in Figure 35 (b), establishing the current channel that just is being shown is channel 3, and this moment, channel 4 was its succeeding channels so.In addition, the necessary bandwidth of establishing channel 5 is guaranteed.In this case, if press the above-mentioned button of going up, though generally can demonstrate the video of channel 4, because such as shown in the figure, the necessary bandwidth of channel 4 do not guaranteed, so channel 4 can be skipped, and demonstrates the video of channel 5.
In Figure 35 (c), show the above-mentioned necessary bandwidth relevant with all channels.In addition, in the figure, face the channel of listening and had mark "＞".Illustrated embodiment is suitable for the user and carries out channel with the numerical key of remote controller etc. and switch.About not guaranteed the channel of bandwidth, also can not be presented in the illustrated tabulation.
About the bar-shaped figure of Figure 35 (a), as mentioned above, can represent whether above-mentioned necessary bandwidth is guaranteed by the color of above-mentioned bar-shaped figure to Figure 35 (c).So, the user can rapidly learn just by the color with reference to above-mentioned bar-shaped figure whether above-mentioned necessary bandwidth is guaranteed.In addition, as mentioned above, also can show above-mentioned necessary bandwidth and the current bandwidth of having been guaranteed together by 1 bar-shaped figure.At this moment, need not to guarantee to use to current guarantee in the viewing area that shows of the bar-shaped figure of bandwidth.
About Figure 34 (a) to Figure 34 (c) and Figure 35 (a) to each display mode shown in Figure 35 (c), the user also can wait to input part 34 input indication informations by remote controller, thereby those display modes are switched.In addition, also can change channel designation, the broadcast station name of Figure 34 (a) in to Figure 34 (c) and Figure 35 (a) to Figure 35 (c).
Other examples when Figure 36 and Figure 37 have represented that above-mentioned bandwidth guaranteed that state is shown in TV.In illustrated example, so that during user's chosen content, above-mentioned bandwidth guarantees that state can be shown in TV20 with above-mentioned EPG when in step S53 EPG being shown in TV20.
Be specially, in Figure 36 and Figure 37,,, show the title of current content of just broadcasting and the predetermined content that will broadcast with time sequencing by each channel based on the broadcasting channel and the airtime of the content that above-mentioned EPG comprised.In addition, illustrated blank arrow has been represented current just selecteed channel, and illustrated black del has been represented current time.
In Figure 36, with regard to current each content of just broadcasting, pay markedness " zero " and mark " * ", thereby represent that with this above-mentioned bandwidth guarantees state the title of this content.Mark " zero " has represented that the necessary bandwidth of corresponding content is in the state of having been guaranteed, and mark " * " has represented that the necessary bandwidth of corresponding content is in the state of not guaranteed.Because the necessary bandwidth of the content of title 3-1, title 5-1 is not guaranteed, so the user just can learn as if channel 1 being switched to channel 3 or channel 5 just might get muddled in the content of resetting by with reference to picture shown in Figure 36.
On the other hand, in Figure 37, about current each content of just broadcasting, the background colour of the title by each content shows that above-mentioned bandwidth guarantees state.In illustrated example, with regard to above-mentioned each content, guaranteed as if necessary bandwidth, just show the background colour of the title of this content with green; If necessary bandwidth is not guaranteed, just show the background colour of the title of this content with redness.The user can rapidly learn just by the background colour of the title of the current content of just broadcasting of reference whether above-mentioned necessary bandwidth is guaranteed.
In Figure 36, though show that with mark " zero ", " * " above-mentioned bandwidth guarantees state, also can use other marks, maybe can use icon, color, " can "/literal such as "No".In addition, in Figure 37, guarantee state, can show that also above-mentioned bandwidth guarantees state by the color of title text line though the background colour by title shows above-mentioned bandwidth.So, can utilize arbitrarily information expressing method to show that above-mentioned bandwidth guarantees state.
In addition, about display mode shown in Figure 36 and display mode shown in Figure 37, the user also can wait to input part 34 input indication informations by remote controller, switches display mode with this.In addition, also can be in a part of zone of the video content that is just showing, overlapping demonstration Figure 36 or image shown in Figure 37.At this moment, the user also can wait to input part 34 input indication informations by remote controller, changes the position of overlapping region with this.
In addition, in Figure 36 and Figure 37, also can change, that is, also can not show or show title or the channel of not guaranteed the content of bandwidth among the current content of just broadcasting with the form of other tones (for example, showing) with the lower color of brightness.Or, also can adopt the user can't select the mode of above-mentioned channel.
(execution mode 4)
Below, another embodiment of the present invention is described with reference to Figure 16 to Figure 19, Figure 38 (a) to Figure 41.Passing a system 11 with Figure 12 to content shown in Figure 15 compares, the content of present embodiment passes the function difference that the difference of sending out system 11 only is bandwidth determination section 42 and bandwidth notice portion 44, the data structure difference of decision bandwidth storage part 47, other structures are same.About with the structure described in the above-mentioned execution mode and handle identical structure and processing, give its identical label, and omit its explanation.
In the present embodiment, bandwidth determination section 42 will be passed the content sent out and this same channel a next predetermined content that will be passed in the two from certain channel is predetermined constantly, the bandwidth of required bandwidth bigger when determining the data transmission, and the bandwidth that is determined as the abundant bandwidth when this this channel of moment audiovisual, and make the above-mentioned moment, above-mentioned channel, above-mentioned abundant bandwidth possesses corresponding relation, is stored in decision bandwidth storage part 47 as bandwidth table then.Above-mentioned processing is that each moment and each channel that EPG is comprised repeat.
When the user will continue next content of audiovisual in the channel of positive audiovisual, bandwidth notice portion 44 judged just whether above-mentioned abundant bandwidth can increase and decrease.If above-mentioned abundant bandwidth increases, bandwidth notice portion 44 just before the switching instant of above-mentioned next content, also have moment of stipulated time from this switching instant, be situated between by the abundant bandwidth of Department of Communication Force 33 after the 15 notice increases of PLC main frame.On the other hand, if above-mentioned abundant bandwidth will reduce, bandwidth notice portion 44 just the switching instant of above-mentioned next content after, have moment of stipulated time from this switching instant, be situated between by the abundant bandwidth of Department of Communication Force 33 after the 15 notice minimizings of PLC main frame.Thus, in the channel of positive audiovisual, need not to reset the bandwidth that to guarantee in the PLC network 16 in the moment that the content of being sent out by biography switches.
Figure 16 is the figure of the bandwidth table of decision bandwidth storage part 47 that expression bandwidth determination section 42 determines and is stored in.Bandwidth table shown in Figure 16 is to ask in the following manner according to EPG shown in Figure 11.
That is, at first, suppose the content AAA of user audiovisual channel CH1 during 8: 00 to 9: 00 this section.At this, if the user does not carry out the handover operation of channel, the content of sending out that passes just can switch to content BBB from content AAA at 9: 00.To this, the bandwidth of necessity was in the two when the data of bandwidth of necessity and content BBB transmitted when the data of content AAA transmit, bigger one as user's under the situation of audiovisual channel CH1, that need guarantee in the PLC network 16 always bandwidth till by 9: 00, abundant bandwidth just.At this, the bandwidth of the 10Mbps of content BBB just is chosen as abundant bandwidth.
Then, establish the content BBB of user audiovisual channel CH1 during 9: 00 to 9: 15 this section.At content BBB with predetermined will pass the content CCC that sends out in 9: 15 in the two, when data transmit the bandwidth of necessity bigger one, the bandwidth of the 15Mbps of content CCC just is chosen as abundant bandwidth, that is to say, the bandwidth of the 15Mbps of content CCC becomes the abundant bandwidth under the following situation, this situation is meant, the user 9: 00 during 9: 15 these sections in the situation of audiovisual channel CH1.Till the last moment of the scheduled broadcast in the EPG, can similarly ask for the abundant bandwidth of user when wanting audiovisual channel CH1.In addition, as user 00 fen audiovisual channel CH1 during 00 fen this section to 12 time 11 time, predeterminedly will pass the content of sending out constantly at next owing to do not exist among the EPG, therefore, the necessary bandwidth of content EEE just directly becomes abundant bandwidth.
About channel CH2 and channel CH3, the abundant bandwidth when asking for this two channel of audiovisual similarly respectively.In addition, to the execution mode shown in Figure 15, be according to constantly deciding the bandwidth that need guarantee in the PLC network 16 at Figure 12, but in the present embodiment, be according to constantly and the channel of the positive audiovisual bandwidth that decides above-mentioned need to guarantee.
Below, illustrate that with reference to Figure 16 to Figure 18 the content with said structure passes the processing motion flow of sending out system 11.Figure 17 is the flow chart that the content of expression present embodiment passes the handling process among the STB17 that sends out system 11.In addition, the processing of the multicast node 51 in the content biography system 11, EPG server 52, PLC main frame 15 is identical with processing shown in Figure 10, so omit explanation.
As shown in figure 17, at first, same with Fig. 9 and Figure 10, the related information obtaining section 41 of STB17 is situated between and asks and obtain EPG by Department of Communication Force 33 to EPG server 52, this EPG contains the related information that IP broadcast server 50 is scheduled to pass the content of sending out, and the EPG that obtains is deposited (storage) in related information storage part 46 (step S50, S51).
Then, the bandwidth determination section 42 of STB17 is with reference to the EPG of storage in the related information storage part 46, and as described above, by each constantly, bandwidth when determining each channel of audiovisual, that need guarantee in the PLC network 16 (fully bandwidth), and make the above-mentioned moment, above-mentioned channel, above-mentioned abundant bandwidth have corresponding relation, and be stored to decision bandwidth storage part 47 (step S110).
The flow chart of the detailed process (step S110) when Figure 18 is the above-mentioned transmission bandwidth of expression bandwidth determination section 42 decisions.As shown in the figure, at first channel c is set at channel 1 (step S130).At this, establishing the content that contains among the EPG is to number the content that channel distributed for the integer since 1.
Then, t is constantly transferred to pass the time of sending out in the contained all the elements of EPG and send out the t0 zero hour (step S131) for the biography of the earliest content.In the EPG of Figure 10 example, t0 is 8: 00.
Then, judge constantly whether to have arrived content by t (c, biography u) is sent out the u zero hour (step S132).At this, content (c, u) represented among the channel c, pass to send out a zero hour be the content of u.Send out the u zero hour (in step S132 for "Yes") if arrived above-mentioned biography, the abundant bandwidth B when just determining when this moment t audiovisual channel c (c, t), and this abundant bandwidth B (c t) is stored to and determines bandwidth storage part 47 (step S133).About the detailed process of step S133, will illustrate afterwards.
Behind completing steps S133, or the above-mentioned biography of no show sends out the zero hour (in step S132 for "No"), and t just advances (step S134) constantly, judges then whether t has constantly arrived the last moment (step S135) among the EPG.If constantly the last moment (being "No" in step S135) among the t no show EPG, just return step S132 and repeat above-mentioned processing action.
On the other hand, if constantly t has arrived the last moment among the EPG (being "Yes" in step S135), judge that just whether channel c is the last channel (step S136) among the EPG.If channel c is not last channel (being "No" in step S136), just makes channel c increase by 1 (step S137), and return step S132 and repeat above-mentioned processing action.On the other hand, if channel c is last channel (being "Yes" in step S136), the wide decision of constipation band is handled, and turns back to flow process originally.
By the processing action of step S130 discussed above to step S137, (c t) is determined abundant bandwidth B among each channel c of EPG, corresponding each moment t, and is stored to decision bandwidth storage part 47 as bandwidth table.In the example of Figure 11, at first, in channel c=1,00 timesharing when moment t=8, owing to be that the biography of content AAA is sent out the zero hour at this moment, thus the pairing abundant bandwidth B of 00 timesharing when asking for constantly t=8 (c, t).Then, constantly t advances, 00 timesharing when moment t=9, owing to be that the biography of content BBB is sent out the zero hour at this moment, thus the pairing abundant bandwidth B of 00 timesharing when asking for constantly t=9 (c, t).Then, constantly t advances, 15 timesharing when moment t=9, owing to be that the biography of content CCC is sent out the zero hour at this moment, thus the pairing abundant bandwidth B of 15 timesharing when asking for constantly t=9 (c, t).Below ask for similarly among the channel c=1, pairing abundant bandwidth B till 00 minute during to t=12 constantly (c, t).In addition, during about channel c=2, channel c=3, also can similarly ask for abundant bandwidth B (c, t).
Figure 19 represented the user when the moment t audiovisual channel c, fully bandwidth B (c, (step S133) handled in detailed decision t).At first, (c, necessary bandwidth t) is set to bandwidth B (step S140) content.At this, (c t) is meant and among the channel c (that is, to be ready to ask for according to bandwidth table channel), predetermined will passes the content of sending out at the moment t content.In the example of Figure 11, (c t) is content AAA to the content when the moment t=8 during 00 fen audiovisual channel c=1.
Then, judge whether to exist content (c, t_next) (step S141).At this, content (c, t_next) be meant among the above-mentioned channel c, constantly passed that next of the content sent out is predetermined will to be passed the content of sending out during t.With regard to aforesaid example, (c t_next) is 00 minute content BBB during t_next=9 constantly to the content when the moment t=8 during this situation of 00 fen audiovisual channel c=1.(c, t_next) (being "No" in step S141) just advances to step S144 if there is not foregoing.
On the other hand, (just (c, necessary bandwidth t_next) is carried out size comparison (step S142) to bandwidth B and content for c, t_next) (be "Yes" in step S141) if there is foregoing.If bandwidth B is less, just (c, necessary bandwidth t_next) is set to bandwidth B (step S143) content.Advance to step S144 thereafter.On the other hand, if bandwidth B more than or equal to content (c, necessary bandwidth t_next) (being "No" in step S142), just steps performed S143 not, and advance to step S144.
In step S144, bandwidth B is defined as the abundant bandwidth that need guarantee in the PLC network 16, then, get back to flow process originally.
Step S140 is equivalent to following processing to the processing of step S144, that is: from channel c, in the two, select the necessary bandwidth of necessary bandwidth bigger as abundant bandwidth as in the predetermined content that will pass of content that moment t pass to send out and among this same channel c next.In the example of Figure 11, when moment t=8, when 00 minute and channel c=1, the necessary bandwidth of content AAA and the necessary bandwidth of content BBB are compared, and the bandwidth 10Mbps of the bigger content BBB of the value of necessary bandwidth is just asked for as abundant bandwidth.Equally, when moment t=8 30 minutes and when being channel CH2, the necessary bandwidth of content GGG and the necessary bandwidth of content HHH are carried out size relatively, and the bandwidth 9Mbps of the bigger content GGG of the value of necessary bandwidth is asked for just as abundant bandwidth.
Get back to Figure 17.As mentioned above, the selection indication obtaining section 43 of STB17 obtains the switching indication back (step S53) of user to content, bandwidth notice portion 44 just reads out the abundant bandwidth of current time from decision bandwidth storage part 47, and Jie should abundant bandwidth be notified to PLC main frame 15 (step S54) by Department of Communication Force 33.Thus, in PLC network 16, guarantee to obtain above-mentioned abundant bandwidth.
In the example of Figure 11 and Figure 16, if selected channel CH1 by the user at 8: 00, at first, bandwidth table in the decision bandwidth storage part 47 is carried out reference, obtain abundant bandwidth 10Mbps in the PLC network 16, that will before 9: 00, guarantee in advance, and be notified to PLC main frame 15, and then the bandwidth in the PLC network 16 just is set., in order to the adding packet of beginning audio-visual content AAA by biography sent to multicast node 51 thereafter, thus, the reception of beginning content AAA in STB17.
During a certain person when satisfy following 3 conditions (step S111, S112, S117) in, carry out and this condition corresponding processing thereafter.
One of in the above-mentioned condition be: the user has sent the situation of the switching indication (being "Yes" in step S112) of channel.At this moment, the content obtaining section 45 of STB17 sends out in order to what the content of announcement audiovisual finished to multicast node 51 and withdraws from packet (step S113).After multicast node 51 has been received and withdrawed from packet, just STB17 is sent out the destination from the multicast biography of foregoing and eliminate.Thus, from the transmission constipation bundle of multicast node 51 to the foregoing of STB17.
Then, bandwidth notice portion 44 is with reference to the bandwidth table of storage in the decision bandwidth storage parts 47, and required abundant bandwidth is notified to PLC main frame 15 (step S114) during the audiovisual of the content (channel) of selection newly of current time institute.After PLC main frame 15 is received this notice, just begin the setting of bandwidth, and give STB17 the result notification of bandwidth settings.
Then, after the content obtaining section 45 of STB17 is received bandwidth settings result's notice, just pass and send the adding packet (step S115) that begins in order to the audiovisual of notifying new chosen content to multicast node 51.After multicast node 51 is received and added packet, just STB17 is appended in the multicast biography destination of foregoing.Thus, transmit new content from multicast node 51 beginnings to STB17, the content obtaining section 45 of STB17 just begins to receive the data (step S116) of new content.
In the example of Figure 11 and Figure 16, if the user is when audiovisual 8 in band, the content AAA of channel CH1 during this period of time way of 00 minute to 8: 30, channel has been switched to channel CH2, withdrawed from packet and just can be sent to multicast node 51 in order to what the audiovisual of content of announcement AAA finished.Then, by the bandwidth table in the reference decision bandwidth storage part 47, the abundant bandwidth 13Mbps of PLC network 16 when deriving audiovisual channel CH2, that before 8: 30, need guarantee in advance.This abundant bandwidth is notified to PLC main frame 15, and the bandwidth in the PLC network 16 just is set then.Thereafter, the adding packet in order to beginning audio-visual content FFF is sent to multicast node 51, the reception of beginning content FFF in STB17 thus.
In addition, another person in the above-mentioned condition is meant: in the channel in audiovisual just, compare can the change situation of (step S117) of next corresponding fully bandwidth that will be passed the content of sending out with the current bandwidth of guaranteeing.When above-mentioned abundant bandwidth will increase, and the biography that has arrived next content send out before the zero hour, when this biographys is sent out the moment that also has the stipulated time (for example 1 minute) constantly (being "Yes" in step S118), or work as above-mentioned abundant bandwidth and will reduce, and the biography that has arrived next content send out after the zero hour, when this biographys is sent out the moment that has the stipulated time (for example 1 minute) constantly, (in step S119, be "Yes"), bandwidth notice portion 44 just notifies needed abundant bandwidth in the PLC networks 16 to PLC main frame 15.
In the example of Figure 11 and Figure 16, when the user 8 the time 00 minute to 9 the time during this section of 00 minute during with channel CH1 audio-visual content AAA, because the abundant bandwidth of depositing in the bandwidth table can be increased to 15Mbps from 10Mbps at 9: 00, therefore, bandwidth notice portion 44 can be begun to send at content BBB for example preceding 1 minute promptly, 8: 59, notice PLC main frame 15 is set out the bandwidth of 15Mbps.In addition, when the user 9 the time 15 minutes to 10 the time during this section of 00 minute during with channel CH1 audio-visual content CCC, because the abundant bandwidth of depositing in the bandwidth table can reduce to 12Mbps from 15Mbps at 10: 00, therefore, bandwidth notice portion 44 can content CCC send after finishing for example 1 minute promptly, 10: 01 timesharing, notice PLC main frame 15 is set out the bandwidth of 12Mbps.
Bandwidth settings can make the transmitting-receiving that management packets takes place between STB17 and the PLC main frame 15, and the scheduling of the allocated bandwidth of PLC main frame 15 inside is changed, and therefore can spend the time of some.In addition, when the bandwidth of guaranteeing when need can increase, if the transmission of next content of beginning before bandwidth settings finishes, desired abundant bandwidth just can be in the non-state of guaranteeing when transmitting this content, and this content can non-ly be guaranteed to be transmitted under the state at this.Therefore, preferably before beginning to transmit new content, just begin to set bandwidth, and preferably when content is begun to transmit, bandwidth settings is just finished.Therefore, in the present embodiment, when the bandwidth of guaranteeing when need can increase, the setting of bandwidth was to carry out before the transmission of new content.
In addition, when the bandwidth of guaranteeing at need will reduce, if before the transmission of the content of current institute audiovisual finishes, the bandwidth of being guaranteed will reduce, abundant bandwidth required when transmitting the content of current positive audiovisual just can be in the non-state of guaranteeing, and this content can non-ly be guaranteed to be transmitted under the state at this.Therefore, preferably after beginning to transmit new content, and carry out bandwidth settings under this state that also can be enough to realize transmitting in the bandwidth after the minimizing.Therefore, in the present embodiment, when the bandwidth of guaranteeing when need will reduce, the setting of bandwidth was to carry out after beginning to send fresh content.
In addition, if the user comes audio-visual content BBB with channel CH1 during this of 9: 00 to 9: 15, because the abundant bandwidth 15Mbps that deposits in the bandwidth table can be in 9: 15 not changing of distribution, therefore, when when content BBB switches to content CCC, the notice of above-mentioned bandwidth can be omitted.But as mentioned above, bandwidth notice portion 44 also can notify to PLC main frame 15: the content as transmission object changes.
In addition, in step S117, in the channel of positive audiovisual,, just omit bandwidth notice (step S120) This move if send out corresponding abundant bandwidth of time and current bandwidth identical (in step S117, being "No") in guaranteeing with the biography of next content.Thus, can alleviate the burden of the bandwidth notifier processes among the STB17, can alleviate simultaneously bandwidth in the PLC main frame 15 and guarantee the burden handled.
Last person of above-mentioned condition is meant: user's these actions such as power supply by closing TV20, send the situation of the indication (in step S111, being "Yes") of content audiovisual end.At this moment, the content obtaining section 45 of STB17 sends to multicast node 51 (step S121) to the packet that withdraws from that finishes in order to the content of announcement audiovisual.After multicast node 51 is received and withdrawed from packet, just STB17 is sent out the destination from the multicast biography of foregoing and eliminate.Thus, from the transmission constipation bundle of multicast node 51 to the foregoing of STB17.In addition, the bandwidth notice portion 44 of the STB17 bandwidth (step S122) also notifying PLC main frame 15 to discharge in PLC16 to be guaranteed.Thereafter end process.
In addition, as mentioned above, the situation that PLC main frame 15 can't be guaranteed above-mentioned abundant bandwidth for STB17 might appear.At this moment, preferred STB17 guarantees that with above-mentioned bandwidth state sends to TV20 to show, thus, notifies to the user.
Figure 38 (a) and Figure 38 (b) represented, bandwidth shown in Figure 33 guarantees that above-mentioned bandwidth shown in the status display area 60 guarantees the example of state.In illustrated example, the above-mentioned bandwidth of content of representing the channel of current positive audiovisual with mark " zero " and mark " * " guarantee state and, the above-mentioned bandwidth of the predetermined content that will broadcast is guaranteed state in this channel.At this, mark " zero " has represented that the necessary bandwidth of corresponding content is in the state of having been guaranteed, and mark " * " has represented that above-mentioned necessary bandwidth is in the state of not guaranteed.Therefore, the user can learn just by with reference to the image shown in Figure 38 (a) and Figure 38 (b) whether the content of switching because of effluxion can get muddled at playback time.
Figure 38 (a) has represented that the above-mentioned bandwidth of content of the channel of current positive audiovisual guarantees that the above-mentioned bandwidth of the predetermined content that will broadcast in state and this channel guarantees state.Therefore, the user can learn just by with reference to the image shown in Figure 38 (a) whether next content that will switch because of effluxion can get muddled at its playback time.
In addition, Figure 38 (b) has represented that the above-mentioned bandwidth of the content in the channel of positive audiovisual guarantees that the above-mentioned bandwidth of the predetermined all the elements that will broadcast in state and this channel guarantees state.In illustrated example, distinguish above-mentioned predetermined each content that will broadcast of expression to broadcast the time started.Therefore, the user can learn just in above-mentioned channel by with reference to the image shown in Figure 38 (b) when the predetermined content that will broadcast can get muddled at its playback time.
In Figure 38 (a) and Figure 38 (b), though represent that with mark " zero ", " * " above-mentioned bandwidth guarantees state, also can use other marks, maybe can use icon, color, " can "/literal such as "No".In addition, also can omit the zone that is used for additional above-mentioned mark etc., but in the column of the text line that contains " content ", represent that with this text line and/or background colour above-mentioned bandwidth guarantees state.For example,, represent above-mentioned text line,, represent above-mentioned text line with redness for the foregoing of not guaranteed necessary bandwidth with green for having been guaranteed the interior perhaps predetermined content that will broadcast necessary bandwidth, that just broadcasting.So, can utilize arbitrarily information expressing method to represent that above-mentioned bandwidth guarantees state.
Figure 39 (a) and Figure 39 (b) have represented that bandwidth shown in Figure 33 guarantees that above-mentioned bandwidth shown in the status display area 60 guarantees other examples of state.In illustrated example, guarantee state about above-mentioned bandwidth, represent current bandwidth in guaranteeing with bar-shaped figure; The necessary bandwidth of representing the predetermined content that will broadcast in the necessary bandwidth of the content in the channel of current positive audiovisual and this channel with bar-shaped figure.Be specially, by represent current bandwidth in guaranteeing by the horizontal bar shape figure that square constituted side by side; By represent the necessary bandwidth of foregoing by the horizontal bar shape figure that black square constituted side by side.1 square among the figure and 1 black square have been represented the bandwidth of about 1Mbps.Therefore, in the example of Figure 39 (a), the bandwidth of being guaranteed is 7Mbps, and the necessary bandwidth of the content of positive audiovisual is 7Mbps.
The user just can learn the necessary bandwidth of foregoing, and can learn whether the current bandwidth of having been guaranteed enough is used for this necessary bandwidth by with reference to the image shown in Figure 39 (a) and Figure 39 (b).
In addition, Figure 39 (a) has represented the necessary bandwidth of the predetermined content that will broadcast in the necessary bandwidth of the content in the channel of current positive audiovisual and this channel.Therefore, the user is by with reference to the image shown in Figure 39 (a), and the necessary bandwidth that just can learn the content of switching because of effluxion is than current bandwidth in guaranteeing, how much exceeds or what are lower than.
In addition, Figure 39 (b) has represented the necessary bandwidth of predetermined several contents that will broadcast in the necessary bandwidth of content of channel of positive audiovisual and this channel.Therefore, the user is by with reference to the image shown in Figure 39 (b), and the necessary bandwidth that just can learn the predetermined content that will broadcast in the above-mentioned channel is than current bandwidth in guaranteeing, how much exceeds or what are lower than.
About the bar-shaped figure of Figure 39 (a) and Figure 39 (b), as mentioned above, can represent whether above-mentioned necessary bandwidth is guaranteed by the color of above-mentioned bar-shaped figure.So, the user can rapidly learn just by the color with reference to above-mentioned bar-shaped figure whether above-mentioned necessary bandwidth is guaranteed.In addition, as mentioned above, also can show above-mentioned necessary bandwidth and current bandwidth in guaranteeing together by 1 bar-shaped figure.At this moment, the bandwidth in can more easily more currently guaranteeing and the necessary bandwidth of each content, and need not to guarantee in order to show current viewing area of guaranteeing the bar-shaped figure of middle bandwidth.
About each display mode shown in Figure 38 (a), Figure 38 (b), Figure 39 (a), Figure 39 (b), the user also can wait to input part 34 input indication informations by remote controller, thereby those display modes are switched.In addition, also the text line shown in Figure 38 (a), Figure 39 (b), Figure 39 (a), Figure 39 (b) can be made into title, channel designation of content etc.
Other examples when Figure 40 and Figure 41 have represented that above-mentioned bandwidth guaranteed that state is shown in TV20.In illustrated example, when in step S53, EPG being shown in TV20 so that during user's chosen content, above-mentioned bandwidth guarantees that state is shown in TV20 with above-mentioned EPG.
Be specially, in Figure 40 and Figure 41,,, show the title of current content of just broadcasting and the predetermined content that will broadcast with time sequencing by each channel based on the broadcasting channel and the airtime of the content that above-mentioned EPG contained.In addition, illustrated blank arrow has been represented the current channel of just selecting, and illustrated black del has been represented current time.
In Figure 40, with regard to each content of the current channel of just selecting, pay markedness " zero " and mark " * " to the title of this content, represent that with this above-mentioned bandwidth guarantees state.The necessary bandwidth of mark " zero " expression corresponding content is in the state of having been guaranteed, and the necessary bandwidth of mark " * " expression corresponding content is in the state of not guaranteed.Because the necessary bandwidth of the content of title 4-4 is not guaranteed that therefore, the user can learn just that by with reference to picture shown in Figure 40 the content of title 4-4 in the channel of just selecting, that broadcasted since 20: 30 probably can get muddled.
On the other hand, in Figure 41,, represent that by the background colour of its title above-mentioned bandwidth guarantees state about each content of the current channel of just selecting.In illustrated example, with regard to above-mentioned each content, guaranteed as if necessary bandwidth, just show the background colour of the title of this content with green; If necessary bandwidth is not guaranteed, just show the background colour of the title of this content with redness.The user can rapidly learn just by with reference to the above-mentioned background look whether above-mentioned necessary bandwidth is guaranteed.
In Figure 40, though represent that with mark " zero ", " * " above-mentioned bandwidth guarantees state, also can use other marks, maybe can use icon, color, " can "/literal such as "No".In addition, in Figure 41,, also can represent that above-mentioned bandwidth guarantees state by the color of title text line though represent that by the background colour of title above-mentioned bandwidth guarantees state.So, can utilize arbitrarily information expressing method to represent that above-mentioned bandwidth guarantees state.
In addition, in Figure 40 and Figure 41, if the user switched channel, so with switch after the relevant above-mentioned bandwidth of channel guarantee that state just is revealed.In addition, about display mode shown in Figure 40 and display mode shown in Figure 41, the user can wait to input part 34 input indication informations by remote controller, thereby switches display mode.In addition, also can be in a part of zone of the video content that is just showing overlapping demonstration Figure 40 or image shown in Figure 41.At this moment, the user also can wait to input part 34 input indication informations by remote controller, changes the position of overlapping region with this.
In addition, in Figure 40 and Figure 41, also can change to,, not show or show with the form of other tones (for example, showing) with the lower color of brightness to not guaranteeing the title of the content of bandwidth in the current channel of just selecting.
(execution mode 5)
Below, with reference to Figure 20 to Figure 23 another embodiment of the present invention is described.The content of present embodiment passes to make up in the system 11 has Figure 12 content biography extremely shown in Figure 15 to send out system 11 and Figure 16 content biography system 11 extremely shown in Figure 19.About with the structure described in the above-mentioned execution mode and handle identical structure and processing, give its identical label, and omit its explanation.
In the present embodiment, bandwidth determination section 42 predeterminedly constantly will pass the necessary bandwidth of the content of sending out and the channel of above-mentioned certain institute's audiovisual constantly among next predetermined necessary bandwidth that will pass the content of sending out from certain, determine one of necessary bandwidth maximum, and the bandwidth that is determined as the abundant bandwidth when this this channel of moment audiovisual, and make the above-mentioned moment, above-mentioned channel, above-mentioned abundant bandwidth have corresponding relation, be stored in decision bandwidth storage part 47 as bandwidth table then.Above-mentioned processing is to repeat with regard to all moment and all channels that contain among the EPG.
During user's audio-visual content, but the content of the audiovisual in certain channel change, bandwidth notice portion 44 just is notified to PLC main frame 15 to the abundant bandwidth that need guarantee in the PLC network 16.In addition, when the user will continue next content of audiovisual in the channel of positive audiovisual, bandwidth notice portion 44 judged just whether above-mentioned abundant bandwidth can increase and decrease.If above-mentioned abundant bandwidth will increase, bandwidth notice portion 44 just before the switching instant of above-mentioned next content, also have moment of stipulated time from this switching instant, be situated between by the abundant bandwidth of Department of Communication Force 33 after PLC main frame 15 notices increase.On the other hand, if above-mentioned abundant bandwidth will reduce, bandwidth notice portion 44 just the switching instant of above-mentioned next content after, have moment of stipulated time from this switching instant, be situated between by the abundant bandwidth of Department of Communication Force 33 after the 15 notice minimizings of PLC main frame.
Thus, when the user in the way of the content of audiovisual channel, when the content of current audiovisual was switched to the content of other channels, because the abundant bandwidth that need guarantee is preestablished in the PLC network 16, therefore, the high speed that can carry out content was switched.In addition, need not to send out the moment that content switches and reset the bandwidth that to guarantee in the PLC network 16 in the biography of the channel of positive audiovisual.
Figure 20 is the figure of the bandwidth table of decision bandwidth storage part 47 that expression bandwidth determination section 42 determines and is stored to.Bandwidth table shown in Figure 20 is to ask for according to EPG shown in Figure 11 and by following processing.
That is, at first, suppose the content AAA of user audiovisual channel CH1 during 8: 00 to 8: 30 this section.At this, when the user has carried out the handover operation of channel, the content that can select be the content FFF of channel CH2 and the content III of channel CH3.On the other hand,, so,, in channel CH1, just begin to pass and send out content BBB, send out with the biography that replaces content AAA to 9: 00 timesharing if the user does not carry out the handover operation of channel.
To this, in the present embodiment, the necessary bandwidth when foregoing AAA, content FFF, content III, content BBB data separately transmit, abundant bandwidth during as audiovisual channel CH1 till 8: 30 of necessary bandwidth maximum, and this abundant bandwidth is stored to decision bandwidth storage part 47.In the example of Figure 11, just be chosen as abundant bandwidth with the corresponding necessary bandwidth 13Mbps of content FFF.
Equally, the content AAA of audiovisual channel CH1 in being located at during 8: 30 to 9: 00 these sections.Passing with synchronization of each channel is scheduled to pass next these content of content BBB of sending out among content AAA, content GGG, content III and the channel CH1 that sends out among, be that the corresponding necessary bandwidth 10Mbps of content BBB elects abundant bandwidth as with one of necessary bandwidth maximum.
In addition, establish the content GGG of user audiovisual channel CH2 during 9: 15 to 10: 00 these sections.The content CCC, the content GGG that pass to send out with synchronization of each channel, content III and, predetermined will the biography among next these content of content HHH of sending out among the channel CH2, with the necessary bandwidth maximum one promptly, the corresponding necessary bandwidth 15Mbps of content CCC elects abundant bandwidth as.
In addition, be located at the content KKK of audiovisual channel CH3 during 11: 00 to 12: 00 this section.In the content EEE, the content HHH that pass to send out with synchronization of each channel, these contents of content KKK, with the necessary bandwidth maximum one promptly, the corresponding necessary bandwidth 12Mbps of content EEE elects abundant bandwidth as.In this embodiment, owing to there is not next predetermined content that will be broadcasted among the channel CH3, therefore, only being passed the content of sending out with this synchronization is that object is asked for necessary bandwidth.
By above-mentioned same order, ask in each channel and each corresponding abundant bandwidth constantly, and, be stored to decision bandwidth storage part 47 as bandwidth table shown in Figure 20.In addition, to the execution mode shown in Figure 15, be according to constantly deciding the bandwidth that need guarantee in the PLC network 16 at Figure 12, but in the present embodiment, be according to constantly and the channel of the positive audiovisual bandwidth that decides above-mentioned need to guarantee.
Below, illustrate that with reference to Figure 20 to Figure 23 the content with said structure passes the processing motion flow of sending out system 11.Figure 21 is the flow chart that the content of expression present embodiment passes the handling process among the STB17 that sends out system 11.In addition, the processing of the multicast node 51 in the content biography system 11, EPG server 52, PLC main frame 15 is identical with processing shown in Figure 10, so omit explanation.
As shown in figure 21, at first, same with Fig. 9 and Figure 10, the related information obtaining section 41 of STB17 is situated between and asks and obtain EPG by Department of Communication Force 33 to EPG server 52, this EPG contains the related information that IP broadcast server 50 is scheduled to pass the content of sending out, and the EPG that obtains is deposited (storage) in related information storage part 46 (step S50, S51).
Then, the bandwidth determination section 42 of STB17 is with reference to the EPG of storage in the related information storage part 46, and as described above, by each constantly, bandwidth when determining each channel of audiovisual, that need guarantee in the PLC network 16 (fully bandwidth), and make the above-mentioned moment, above-mentioned channel, above-mentioned abundant bandwidth have corresponding relation, and deposit to decision bandwidth storage part 47 (step S150).
The flow chart of the detailed process (step S150) when Figure 22 is the above-mentioned transmission bandwidth of expression bandwidth determination section 42 decisions.As shown in the figure, t constantly is adjusted to passes the time of sending out in the contained all the elements of EPG and send out the t0 zero hour (step S170) for the biography of the earliest content.In the example of Figure 11, t0 is 8: 00.Then, channel i is set at 1 (step S171).At this, the content that contains among the EPG is to number the content of channel allocation since 1 integer.
Then, judge constantly whether to have arrived content by t (i, biography u) is sent out the u zero hour (step S172).At this, content (i, u) represented among the channel i, pass the content of sending out since moment u.
If (i, biography u) is sent out the u zero hour (being "No" in step S172) to t no show content, judges just whether channel i is channel number (step S173) last among the EPG constantly.If not last channel number (being "No" in step S173) just makes channel i increase by 1 (step S174), return step S172 thereafter and repeat above-mentioned action.On the other hand, if last channel number (being "Yes") arrives and passes the content of sending out the u zero hour and do not exist just be judged as constantly t, advance to step S179 then in step S173.
On the other hand, if t has arrived content (i constantly, u) biography is sent out the zero hour (being "Yes" in step S172), just channel c is set for 1 (step S175), determine then corresponding to the maximum of the necessary bandwidth of this moment t promptly, abundant bandwidth B (t), and make moment t, channel c, abundant bandwidth B (t) possess corresponding relation, be stored to decision bandwidth storage part 47 (step S176) then.About step S176, will describe in detail afterwards.
Then, judge whether channel c is channel number (step S177) last among the EPG.If not last channel number (being "No" in step S177) just makes channel c increase by 1 (step S178), return step S176 thereafter and repeat above-mentioned action.On the other hand, if last channel number (being "Yes" in step S177) is determined just be judged as with moment t abundant bandwidth corresponding, each channel, and is advanced to step S179.
In step S179, t advances the time of defined constantly.Secondly, judge whether t has arrived the last moment (step S180) contained among the EPG constantly.If constantly the t above-mentioned last moment of no show (being "No" in step S180), just return step S171 and repeat above-mentioned processing action.On the other hand, if t has arrived the above-mentioned last moment (being "Yes" in step S180) constantly, the wide decision of constipation band is handled, and turns back to flow process originally.
By the processing action of above-described step S170 to S180, (c t) is determined abundant bandwidth B among each channel c of EPG, corresponding with each moment t, and is stored to decision bandwidth storage part 47 as bandwidth table.In the example depicted in fig. 11, at first, 00 timesharing when moment t=8 is owing to the biography that is the content AAA of channel i=1 is at this moment sent out the time started, the abundant bandwidth B of pairing, channel c=1, c=2 of 00 timesharing, c=3 in the time of therefore will asking for t=8 constantly (c, t).Then, constantly t advances, 30 timesharing when moment t=8, owing to be that the biography of the content GGG of channel i=2 is sent out the time started at this moment, the abundant bandwidth B of pairing, channel c=1, c=2 of 30 timesharing, c=3 in the time of therefore will asking for t=8 constantly (c, t).Then, constantly t advances, 00 timesharing when moment t=9, owing to be that the biography of the content BBB of channel i=1 is sent out the time started at this moment, and the abundant bandwidth B (t) of pairing, channel c=1, c=2 of 00 timesharing, c=3 in the time of therefore will asking for t=9 constantly.Below, abundant bandwidth B when similarly asking for moment t=12 till 00 minute, each channel c (c, t).
Figure 23 has represented the abundant bandwidth B of decision (c, the detailed process of (step S176) in the time of t).As shown in the figure, at first the bandwidth B that need guarantee in the PLC network 16 is initialized as 0Mbps, counter i is initialized as 1 (step S190).Then, make comparisons with above-mentioned bandwidth B, (i, whether necessary bandwidth t) big (step S191) to judge content.If bigger, just (i, necessary bandwidth t) is set to bandwidth B (step S192), thereafter, advances to step S193 content.
At this, (i t) is meant that the moment t that is predefined among the channel i passes the content of sending out to content.In the example of Figure 11, when moment t=8 30 timesharing the content that can select be: predetermined among the channel CH1 will pass predetermined content AAA, the channel CH2 that sends out from 8: 00 to 9: 00 and will pass the content III that being scheduled to content GGG, the channel CH3 that sends out will pass from 8: 00 to 10: 10 from 8: 30 to 11: 00.
Then, in step S193, (i+1 t), that is, judges whether store in the related information storage part 46 and content (i+1, t) corresponding EPG to judge whether to exist content.If storage (being "Yes" in step S193) is arranged, just make counter i increase by 1 (step S194), return step S191 then and repeat above-mentioned action.On the other hand, if not storage (being "No" in step S193) just judges whether to exist content (c, t_next) (step S195).At this, content (c t_next) is meant, among the above-mentioned channel c, constantly passed that next of the content sent out is predetermined will to be passed the content of sending out during t.With the example of Figure 11, as if 30 fens audiovisual channel c=1 when moment t=8, the content of this moment (c, 00 minute content BBB when t_next) being moment t_next=9.(c, t_next) (being "No" in step S141) just advances to step S198 if there is not foregoing.
On the other hand, (just (c, necessary bandwidth t_next) is carried out size comparison (step S196) to bandwidth B and content for c, t_next) (be "Yes" in step 195) if there is foregoing.If bandwidth B is less, just (c, necessary bandwidth t_next) is set to bandwidth B (step S197), advances to step S144 thereafter content.On the other hand, if bandwidth B more than or equal to content (c, necessary bandwidth t_next) (being "No" in step S196), just steps performed S197 not, and advance to step S198.
In step S198, bandwidth B is defined as the abundant bandwidth that need guarantee in the PLC network 16, get back to flow process originally then.
Step S190 is equivalent to following processing to the processing of step S198, passes the content sent out and next predetermined will the biography in the content of sending out among certain channel c in moment t from each channel that is:, selects the necessary bandwidth of necessary bandwidth bigger as abundant bandwidth as.In the example of Figure 11, when the moment t=8 when 00 minute and channel c=1, the necessary bandwidth of content AAA, content GGG, content III, content BBB is carried out size relatively, and the bandwidth 13Mbps of the content BBB of the value maximum of necessary bandwidth is asked for just as abundant bandwidth.Equally, when moment t=10, when 00 minute and channel c=2, the necessary bandwidth of content DDD, content GGG, content III, content HHH is carried out size relatively, and the bandwidth 9Mbps of the content GGG of the value maximum of necessary bandwidth is asked for just as abundant bandwidth.
Get back to Figure 21.As mentioned above, the selection indication obtaining section 43 of STB17 has obtained the switching indication back (step S53) to content from the user, bandwidth notice portion 44 just reads out the abundant bandwidth selected content of current time, corresponding channel from decision bandwidth storage part 47, and Jie should abundant bandwidth be notified to PLC main frame 15 (step S54) by Department of Communication Force 33.Thus, in PLC network 16, guarantee to obtain above-mentioned abundant bandwidth.
In the example of Figure 11 and Figure 20, if selected channel CH1 by the user at 8: 00, at first, with reference to the bandwidth table in the decision bandwidth storage part 47, obtain abundant bandwidth 13Mbps till 8: 00 to 8: 30, that need guarantee in the PLC network 16, be notified to PLC main frame 15, and then the bandwidth in the PLC network 16 is set just.Thereafter, the adding packet in order to beginning audio-visual content AAA is sent to multicast node 51, the reception of beginning content AAA in STB17 thus.
During a certain person when satisfy following 4 conditions (step S151, S152, S156, S157) in, carry out and this condition corresponding processing thereafter.
One of above-mentioned condition is: the user has sent the situation of the switching indication (being "Yes" in step S152) of channel.At this moment, the content obtaining section 45 of STB17 sends out in order to what the content of announcement audiovisual finished to multicast node 51 and withdraws from packet (step S 153).After multicast node 51 has been received and withdrawed from packet, just STB17 is sent out the destination from the multicast biography of foregoing and eliminate.Thus, from the transmission constipation bundle of multicast node 51 to the foregoing of STB17.
Then, the content obtaining section 45 of STB17 passes to multicast node 51 and sends out the adding packet (step S154) that begins in order to the audiovisual of notifying new chosen content.After multicast node 51 is received and added packet, just STB17 is appended in the multicast biography destination of foregoing.Thus, transmit new content from multicast node 51 beginnings to STB17, the content obtaining section 45 of STB17 just begins to receive the data (step S155) of fresh content.
Thereafter, bandwidth notice portion 44 is with reference to the bandwidth table of storage in the decision bandwidth storage parts 47, and required abundant bandwidth is notified to PLC main frame 15 (step S114) during the audiovisual of the content (channel) of selection newly of current time institute.PLC main frame 15 is received the setting that just begins bandwidth after this notice, and gives STB17 the result notification of bandwidth settings.
In the example of Figure 11 and Figure 20, if the user when audiovisual 8 30 minutes to the way of 9: 00 content AAA during this period of time, channel CH1, channel has been switched to channel CH2, and the packet that withdraws from that finishes in order to the audiovisual of content of announcement AAA just at first is sent to multicast node 51.Then, can be sent to multicast node 51 in order to the adding packet that begins audio-visual content GGG, thus the reception of beginning content GGG in STB17.Then, with reference to bandwidth table meeting in the decision bandwidth storage part 47, derivation during this section of 8: 30 to 9: 00 in during audiovisual channel CH2, the required abundant bandwidth 9Mbps that guarantees in advance in the PLC network 16.This abundant bandwidth is notified to PLC main frame 15, and the bandwidth in the PLC network 16 just is set then.
In addition, another person of above-mentioned condition is meant: with reference to the bandwidth table in the decision bandwidth storage part, and the situation that the moment that the bandwidth that need guarantee in the PLC network 16 changes (being "Yes" in step S156) has arrived.When this situation, bandwidth notice portion 44 notifies new abundant bandwidth (step S160) to PLC main frame 15.In the example of Figure 11 and Figure 20, when from 8 the time 00 minute to 9 the time 00 minute during with channel CH1 audio-visual content AAA, because in 8: 30 timesharing, the abundant bandwidth of depositing in the decision bandwidth storage part 47 becomes 10Mbps from 13Mbps, therefore, bandwidth notice portion 44 can set the necessary bandwidth of PLC network 16 for 10Mbps at 8: 30 timesharing notice PLC main frame 15.
In addition, another person of above-mentioned condition is meant: in the channel in audiovisual just, compare with the current bandwidth of guaranteeing, send out will the change situation of (step S157) of corresponding abundant bandwidth of time with the biography of next content.When above-mentioned abundant bandwidth will increase, and the biography that has arrived next content send out before the zero hour, when this biographys is sent out the moment that also has the stipulated time (for example 1 minute) constantly (being "Yes" in step S158), or work as above-mentioned abundant bandwidth and will reduce, and the biography that has arrived next content send out after the zero hour, when this biographys is sent out the moment that has the stipulated time (for example differing from 1 minute) constantly, (in step S159, be "Yes"), bandwidth notice portion 44 just notifies required abundant bandwidth in the PLC networks 16 to PLC main frame 15.
In the example of Figure 11 and Figure 20, when the user 8 the time 30 minutes to 9 the time during this section of 00 minute during with channel CH1 audio-visual content AAA, because the abundant bandwidth of depositing in the bandwidth table can be increased to 15Mbps from 10Mbps at 9: 00, therefore, bandwidth notice portion 44 can be at for example preceding 1 minute of beginning audio-visual content BBB promptly, 8: 59, notice PLC main frame 15 becomes 15Mbps to the bandwidth settings of PLC network 16.
In addition, when 9 the time 15 minutes to 10 the time during this section of 00 minute during with channel CH1 audio-visual content CCC, because the abundant bandwidth of depositing in the bandwidth table can reduce to 12Mbps from 15Mbps at 10: 00, therefore, bandwidth notice portion 44 can be behind beginning audio-visual content DDD for example 1 minute promptly, 10: 01, notice PLC main frame 15 becomes 12Mbps to the bandwidth settings of PLC network 16.
In addition, if during this section of 9: 00 to 9: 15, come audio-visual content BBB, because the abundant bandwidth 15Mbps that deposits in the bandwidth table can be in 9: 15 not changing of distribution, therefore with channel CH1, when when content BBB switches to content CCC, the notice of above-mentioned bandwidth can be omitted.But as mentioned above, bandwidth notice portion 44 also can notify the content that becomes transmission object to change to PLC main frame 15.
Last person of above-mentioned condition is meant: user's these actions such as power supply by closing TV20, the audiovisual of sending content finishes indication (being "Yes" in step S151).At this moment, the content obtaining section 45 of STB17 sends to multicast node 51 (step S161) to the packet that withdraws from that finishes in order to the content of announcement audiovisual.After multicast node 51 has received and withdrawed from packet, just STB17 is sent out the destination from the multicast biography of foregoing and eliminate.Thus, from the transmission constipation bundle of multicast node 51 to the foregoing of STB17.In addition, the bandwidth notice portion 44 of the STB17 bandwidth (step S162) also notifying PLC main frame 15 to discharge among the PLC16 to be guaranteed.Thereafter end process.
In addition, as mentioned above, the situation that PLC main frame 15 can't be guaranteed above-mentioned abundant bandwidth for STB17 might appear.When this situation, preferred STB17 guarantees that with above-mentioned bandwidth state sends to TV20 to show, notifies to the user thus.Guarantee the display image example of state about showing above-mentioned bandwidth, for example have, by Figure 34 (a) to Figure 34 (c) a certain person and the image that a certain person was combined into of Figure 38 (a) and Figure 38 (b), by Figure 35 (a) to Figure 35 (c) a certain person and the image that a certain person was combined into of Figure 39 (a) and Figure 39 (b), by image that Figure 36 and Figure 40 were combined into, by the image that Figure 37 and Figure 41 were combined into, or the like.
When Figure 36 and Figure 40 and Figure 37 and Figure 41 are made up, with the channel of just selecting and current time irrespectively, demonstrate above-mentioned bandwidth with regard to all titles and guarantee state.But can show preferentially that also the above-mentioned bandwidth relevant with the channel of just selecting guarantee state.Or, also can according to from the channel of just selecting from closely showing that to order far away above-mentioned bandwidth guarantees state.
For example in Figure 41, the current channel of just selecting is a channel 4, so corresponding above-mentioned bandwidth is guaranteed state, according to the order change background colour of title 4-1, title 4-2, title 4-3, title 4-4.In addition, just be adjacent to the channel 3 and the channel 5 of the channel of just selecting, judge that the pairing above-mentioned bandwidth of each title guarantees state, the corresponding then above-mentioned bandwidth of being judged is guaranteed state, changes the background colour of each title.Thereafter, according to from the channel of just selecting near to order far away, judge that the pairing above-mentioned bandwidth of each title guarantees state, and change background colour.
Equally, also can according to from the current time from closely showing that to order far away above-mentioned bandwidth guarantees state.For example in Figure 41, with regard to the current content of just broadcasting, press the order of title 4-1, title 3-1, title 5-1, title 2-1, title 1-1, corresponding above-mentioned bandwidth guarantees that state changes background colour.When this situation, also with above-mentioned same, can according to from the channel of just selecting from closely changing background colour to order far away.
In addition, about next content that will broadcast in each channel, according to the broadcasting time started from current time near to order far away, corresponding above-mentioned bandwidth guarantees that state changes the background colour of the title of this content.For example, the order according to title 4-2, title 1-2, title 3-2, title 4-3 changes background colour in Figure 41.
By above-mentioned demonstration, the content that can select probably the user confirms that above-mentioned bandwidth guarantees state.Therefore, will use the long time even the above-mentioned bandwidth of affirmation all the elements is guaranteed state, but the user also can confirm necessary information rapidly.
(execution mode 6)
Below, with reference to Figure 24 to Figure 26 another embodiment of the present invention is described.Passing a system 11 with Figure 12 to content shown in Figure 15 compares, the difference that the content of present embodiment passes a system 11 only is the function difference of bandwidth determination section 42 and bandwidth notice portion 44, the data structure difference of decision bandwidth storage part 47, and other structures are same.About with the structure described in the above-mentioned execution mode and handle identical structure and processing, give its identical label, and omit its explanation.
About the multicast in the IP broadcast, when the audiovisual from a certain content switches to the audiovisual of other guide since before the biography of flow data of content do not send out and can finish at once, therefore, before switching with switch after both flow data can in PLC network 16, transmit simultaneously.
To this, in the present embodiment, among bandwidth determination section 42 is broadcasted the content of positive audiovisual when data transmit in necessary bandwidth and other channels of synchronization the content, necessary bandwidth is carried out addition for maximum bandwidth when data transmit, and the bandwidth after the addition as this abundant bandwidth during this channel of audiovisual constantly, and make the above-mentioned moment, above-mentioned channel, above-mentioned abundant bandwidth possess corresponding relation, and be stored to decision bandwidth storage part 47 as bandwidth table.Above-mentioned processing action is that all moment and all channels that EPG comprised are repeated.
During at every turn because of the switching switch contents of channel, the abundant bandwidth that bandwidth notice portion 44 just need guarantee in PLC main frame 15 notice PLC networks 16.In addition, when the variation of the abundant bandwidth of being stored in the decision bandwidth storage part 47 arrived constantly, bandwidth notice portion 44 just was situated between and by Department of Communication Force 33 the abundant bandwidth after changing is notified to PLC main frame 15.
So, even the data of before switching when the switching of content and switching back two sides' content under the streamed situation, also can not receive data mussily in PLC network 16.
Figure 24 is the figure of the bandwidth table of decision bandwidth storage part 47 that expression bandwidth determination section 42 determines and is stored in.Bandwidth table shown in Figure 24 is according to EPG shown in Figure 11 and asks in the following manner.
That is, at first, suppose the content AAA of user audiovisual channel CH1 during 8: 00 to 8: 30 this section.At this, if the user carries out the handover operation of channel, so the content that can select be the content FFF of channel CH2 and the content III of channel CH3.At this, the necessary bandwidth of content FFF and content III is compared as can be known: the necessary bandwidth of content FFF is bigger.
To this, the necessary bandwidth 5Mbps of content AAA and the necessary bandwidth 13Mbps of content FFF are carried out addition, thereby obtain 18Mbps, if in PLC network 16, guarantee to obtain the bandwidth of this 18Mbps, so no matter to be when content AAA switches to content FFF, still when content AAA switched to content III, stream transmitted even the content of the two before and after switching takes place simultaneously, also can not receive data mussily.Therefore, the abundant bandwidth 18Mbps during as audiovisual channel CH1 during 8: 00 to 8: 30 this section, and deposit into bandwidth table.
Equally, be located at the content FFF of audiovisual channel CH2 during 8: 00 to 8: 30 this section.In the two, the necessary bandwidth 8Mbps of content III is bigger at content AAA and content III.The necessary bandwidth 8Mbps of the necessary bandwidth 13Mbps of content FFF and content III is carried out addition, thereby obtain the bandwidth of 21Mbps, so just can as long as in PLC network 16, guarantee the bandwidth that obtains 21Mbps.In addition, be located at the content III of audiovisual channel CH3 during 9: 15 to 10: 00 these sections.In the two, the necessary bandwidth 15Mbps of content CCC is bigger at content CCC and content GGG.The necessary bandwidth 15Mbps of the necessary bandwidth 8Mbps of content III and content CCC is carried out addition, thereby obtain the bandwidth of 23Mbps, so just can as long as in PLC network 16, guarantee the bandwidth that obtains 23Mbps.
By above-mentioned same order, ask for each abundant bandwidth constantly in each channel, and as depositing as the bandwidth table of Figure 24 to decision bandwidth storage part 47.In addition, to the execution mode shown in Figure 15, be according to constantly deciding the bandwidth that need guarantee in the PLC network 16 at Figure 12, but in the present embodiment, be according to constantly and the channel of the positive audiovisual bandwidth that decides above-mentioned need to guarantee.
Below, illustrate that with reference to Figure 24 to Figure 26 the content with said structure passes the processing motion flow of sending out system 11.Figure 25 is the flow chart that the content of expression present embodiment passes the handling process among the STB17 that sends out system 11.In addition, the processing of the multicast node 51 in the content biography system 11, EPG server 52, PLC main frame 15 is identical with processing shown in Figure 10, so omit explanation.
As shown in figure 25, at first, same with Fig. 9 and Figure 10, the related information obtaining section 41 of STB17 is situated between and asks and obtain EPG by Department of Communication Force 33 to EPG server 52, this EPG contains the related information that IP broadcast server 50 is scheduled to pass the content of sending out, and the EPG that obtains is deposited (storage) in related information storage part 46 (step S50, S51).
Then, the bandwidth determination section 42 of STB17 is with reference to the EPG of storage in the related information storage part 46, and as described above, by each constantly, bandwidth when determining each channel of audiovisual, that need guarantee in the PLC network 16 (fully bandwidth), and make the above-mentioned moment, above-mentioned channel, above-mentioned abundant bandwidth have corresponding relation, and deposit to decision bandwidth storage part 47 (step S200).
The flow chart of the detailed process (step S200) when Figure 26 is the above-mentioned transmission bandwidth of expression bandwidth determination section 42 decisions.As shown in the figure, at first (c, necessary bandwidth t) is set to bandwidth B 1 (step S210) content.At this, content (c t) is meant, among the channel c (that is, to be ready to ask for channel) by bandwidth table, predeterminedly to pass the content of sending out at moment t.
Then, bandwidth B 2 is initialized as 0Mbps, channel i is initialized as 1 (step S211).Then, judge channel i and channel c whether identical (step S212).Equate (in step S212, being "Yes") with channel c if judge channel i, just advance to step S215.
On the other hand, if judge channel i and channel c (being "No") inequality in step S212, just (i, bandwidth t) is carried out size comparison (step S213) to bandwidth B 2 and content.At this, (i t) is meant that being scheduled among the channel i will pass the content of sending out at moment t to content.
In the example of Figure 11, constantly (i t) is the content that 30 timesharing institute can select during t=8: predeterminedly among the channel CH1 will pass the content III that is scheduled to predetermined content GGG, the channel CH3 that will pass from 8: 30 to 11: 00 content AAA, the channel CH2 that sends out to pass from 8: 00 to 10: 10 from 8: 00 to 9: 00.
(i, necessary bandwidth t) (being "No" in step S213) just advances to step S215 more than or equal to content as if bandwidth B 2.On the other hand, (just (i, necessary bandwidth t) is set to bandwidth B 2 (step S214), advances to step S215 then content for i, necessary bandwidth t) (being "Yes" in step S213) less than content as if bandwidth B 2.
Then, in step S215, judge whether to exist content (i+1, t).If (i+1, t) (being "Yes" in step S215) just make channel i increase by 1 (step S216), return step S212 thereafter content.On the other hand, if there is not content (i+1, t) (being "No" in step S215), just with the bandwidth of addition bandwidth B 1 and bandwidth B 2 back gained as abundant bandwidth B (step S217), and bandwidth B is defined as the bandwidth (step S218) that need guarantee in the PLC network 16.Finish bandwidth decision processing, and return flow process originally thereafter.
Step S210 is equivalent to following processing to the processing of step S218, that is, with just the content of audiovisual when data transmit necessary bandwidth and other channels of synchronization in the content broadcasted the necessary bandwidth when data transmit carry out addition for maximum bandwidth.In the example of Figure 24, when the moment t=8 when 00 minute and channel c=1, to carrying out addition, thereby determine the bandwidth of 18Mbps with the corresponding bandwidth 5Mbps of content AAA and with the corresponding bandwidth 13Mbps of content FFF.Equally, when the moment t=9 when 15 minutes and channel c=3, to carrying out addition, thereby determine the bandwidth of 23Mbps with the corresponding bandwidth 8Mbps of content III and with the corresponding bandwidth 15Mbps of content CCC.
Get back to Figure 25.As mentioned above, the selection indication obtaining section 43 of STB17 has obtained the switching indication back (step S53) to content from the user, bandwidth notice portion 44 just reads out the abundant bandwidth selecteed content of current time, corresponding channel from decision bandwidth storage part 47, and Jie should abundant bandwidth be notified to PLC main frame 15 (step S54) by Department of Communication Force 33.Thus, in PLC network 16, guarantee to obtain above-mentioned abundant bandwidth.
In the example of Figure 11 and Figure 24, if the user in 8: 00 component selections channel CH1, at first obtain abundant bandwidth 18Mbps 8: 00 to 8: 30, that need guarantee in advance in the PLC network 16, be notified to PLC main frame 15, and then the bandwidth in the PLC network 16 is set with reference to bandwidth table., in order to the adding packet that begin audio-visual content AAA be sent to multicast node 51 thereafter, thus, the reception of beginning content AAA in STB17.
During a certain person when satisfy following 3 conditions (step S201, S202, S206) in, carry out and this condition corresponding processing thereafter.
Be meant one of in the above-mentioned condition: the bandwidth table to storage in the decision bandwidth storage part 47 carries out reference, and the moment that the bandwidth that need guarantee in the PLC network 16 changes arrives the situation of (being "Yes" in step S206).At this moment, bandwidth notice portion 44 notifies new abundant bandwidth (step S207) to PLC main frame 15.In the example of Figure 11 and Figure 24, when from 8 the time 00 minute to 9 the time 00 minute during with channel CH1 audio-visual content AAA, because the abundant bandwidth of depositing in the bandwidth table can become 14Mbps from 18Mbps in 8: 30 timesharing, therefore, bandwidth notice portion 44 can become 14Mbps to the bandwidth settings in the PLC network 16 at 8: 30 timesharing notice PLC main frame 15.
Another person in the above-mentioned condition is meant: the user sends the switching indication (being "Yes" in step S202) of channel.At this moment, the content obtaining section 45 of STB17 sends out in order to what the content of announcement audiovisual finished to multicast node 51 and withdraws from packet (step S203).After multicast node 51 has been received and withdrawed from packet, just STB17 is sent out the destination from the multicast biography of foregoing and eliminate.Thus, from the transmission constipation bundle of multicast node 51 to the foregoing of STB17.
Then, the content obtaining section 45 of STB17 sends out the adding packet (step S205) that begins in order to the audiovisual of notifying new chosen content to multicast node 51.After multicast node 51 was received and added packet, just appending STB17 into, the multicast of foregoing passed in the destination.Thus, just begin to transmit new content to STB17 from multicast node 51, the content obtaining section 45 of STB17 promptly begins to receive the data (step S205) of new content.
Thereafter, bandwidth notice portion 44 is with reference to the bandwidth table of depositing in the decision bandwidth storage parts 47, and the abundant bandwidth during the content (channel) of the new selection of audiovisual current time institute is notified to PLC main frame 15 (step S207).After PLC main frame 15 is received this notice, begin the setting of bandwidth, and give STB17 the result notification of bandwidth settings.
In the example of Figure 11 and Figure 24, if in the way of user content AAA during 00 minute to 8: 30 this section, channel CH1 when audiovisual 8, channel has been switched to channel CH2, withdraw from packet and just can be sent to multicast node 51 in order to what the audiovisual of content of announcement AAA finished, then, adding packet in order to beginning audition content FFF is sent to multicast node 51, thus beginning received content FFF in STB17.Then, with reference to bandwidth table, abundant bandwidth 21Mbps when deriving during 8: 00 to 8: 30 this section audiovisual channel CH2, that need guarantee in the PLC network 16, and be notified to PLC main frame 15, and then the bandwidth in the PLC network 16 just is set.
Last person of above-mentioned condition is meant: these actions such as the power supply of user by closing TV20, the situation when sending the indication (being "Yes" in step S201) that the content audiovisual finishes.At this moment, the content obtaining section 45 of STB17 sends to multicast node 51 (step S208) to the packet that withdraws from that finishes in order to the content of announcement audiovisual.After multicast node 51 has received and withdrawed from packet, just STB17 is sent out the destination from the multicast biography of foregoing and eliminate.Thus, from the transmission constipation bundle of multicast node 51 to the foregoing of STB17.In addition, the bandwidth notice portion 44 of STB17 also notifies PLC main frame 15 to discharge among the PLC16 bandwidth (step S209) for STB17 guaranteed.Thereafter end process.
(execution mode 7)
Below, with reference to Figure 28 another embodiment of the present invention is described.Passing a system 11 with Figure 16 to content shown in Figure 19 compares, the content of present embodiment passes the function difference that the difference of sending out system 11 only is bandwidth determination section 42 and bandwidth notice portion 44, the data structure difference of decision bandwidth storage part 47, other structures are same.About with the structure described in the above-mentioned execution mode and handle identical structure and processing, give its identical label, and omit its explanation.
In the present embodiment, bandwidth determination section 42 directly as bandwidth table, and is stored to decision bandwidth storage part 47 to as shown in figure 11 EPG with it.In the time will continuing next content of audiovisual by the channel of positive audiovisual, bandwidth notice portion 44 judges that just above-mentioned abundant bandwidth is can increase or can reduce.If above-mentioned abundant bandwidth can increase, bandwidth notice portion 44 just before the biography of next content is sent out the zero hour, send out the moment that also has the stipulated time (for example 1 minute) constantly from this biography, being situated between is notified to PLC main frame 15 to the abundant bandwidth after increasing by Department of Communication Force 33.Thus, when the biography of above-mentioned next content is sent out the zero hour,,, can not stagnate and receive reliably so send out constantly from the biography of above-mentioned next content owing to guaranteed in order to the bandwidth of necessity of receiving above-mentioned next content.Consequently can prevent from when the playback of video of above-mentioned next content, to get muddled.
On the other hand, if above-mentioned abundant bandwidth reduces, bandwidth notice portion 44 just after the biography of the content of positive audiovisual is sent out the finish time, send out the moment that has the stipulated time finish time from this biographys, being situated between is notified to PLC main frame 15 by the abundant bandwidth after 33 minimizings of Department of Communication Force.Thus, after the biography of the content of positive audiovisual is sent out the finish time, desired necessary bandwidth when desired necessary bandwidth changes over the reception of above-mentioned next content in the time of can be from the reception of the content of this positive audiovisual.Therefore, send out the finish time to the biography of the content of above-mentioned positive audiovisual till, can not stagnate, and can receive reliably, can also not stagnate and receive reliably above-mentioned next content.Consequently the playback of video that can prevent the content of positive audiovisual gets muddled, and can prevent that the playback of video of above-mentioned next content from getting muddled.
Figure 28 is that the content of present embodiment passes the process chart among the STB17 that sends out system 11.Compare with processing shown in Figure 17, the difference of processing shown in Figure 28 is to have omitted step S110, and has replaced step S118, S119 with step S123, S124.Other processing is same.
When in step S117, necessary bandwidth when the audiovisual of next content in the channel of positive audiovisual, the bit rate that next will pass the content of sending out increase than the current bandwidth of guaranteeing, and the biography of next content send out before the zero hour, send out the moment that also has the stipulated time (for example 1 minute) constantly when having arrived (being "Yes") from this biographys in step S123, bandwidth notice portion 44 just notifies the bit rate (necessary bandwidth) (step S120) of next content to PLC main frame 15.
In the example of Figure 11, when audiovisual channel CH1, the biography of content AAA is sent out and can be finished at 9: 00, is content BBB and then begin to pass what send out.At this moment because bit rate can be increased to 10Mbps from 5Mbps, so bandwidth notice portion 44 can content BBB begun to pass send out for example before 1 minute promptly, 8: 59, notice PLC main frame 15 is set out the bandwidth of 10Mbps.
Before above-mentioned 1 minute, also can be set at 3 minutes before or before 5 minutes to shift to an earlier date.At this moment, though can guarantee unnecessary bandwidth, owing to can increase the number of attempt of bandwidth settings, therefore can reduce bandwidth and guarantee the possibility of failing.
In addition, in 10: 00 timesharing, the biography of content CCC is sent out end, is content DDD and then begin to pass what send out.At this moment because bit rate can reduce 5Mbps from 15Mbps, therefore, bandwidth notice portion 44 content CCC pass send out finish for example after 1 minute promptly, 10: 01, notice PLC main frame 15 is set out the bandwidth of 5Mbps.
After above-mentioned 1 minute, also can be set at 3 minutes after or after 5 minutes to postpone.At this moment, though can guarantee unnecessary bandwidth, till finishing fully to the content of positive audiovisual, can not stagnate and receive reliably.
In addition, as previously mentioned, if carry out bandwidth settings continually, the processing burden of STB17 and PLC main frame 15 can increase.To this, when switching to next content, bandwidth notice portion 44 also can not guarantee the bit rate of this next content, but the bit rate of above-mentioned next content and, among the bit rate of 1 above content after this next content, maximum bit rate is notified to PLC main frame 15, so that the PLC main frame is guaranteed this maximum bit rate.When this situation,, therefore can alleviate the processing burden of STB17 and PLC main frame 15 owing to can reduce the number of times of bandwidth settings.
For example, in Figure 11, when audiovisual channel CH1, in 9: 00 timesharing, the biography of content AAA is sent out end, is content BBB and then begin to pass what send out, and will begin to pass what send out thereafter is content CCC.At this moment, can be not at the bit rate 10Mbps of 8 o'clock 59 fens content of announcement BBB, also not at the bit rate 15Mbps of 9 o'clock 14 fens content of announcement CCC, and among the two bit rate of 8: 59 content of announcement BBB, CCC a bigger side's bit rate 15Mbps.
When this situation, though the original bandwidth of guaranteeing 10Mbps in during the biography of content BBB is sent out just can, carried out the bandwidth of 15Mbps and guaranteed.Be relatively short 15 minutes during yet the biography of content BBB is sent out, therefore, guaranteeing unnecessary bandwidth during also shorter.Like this, if the bandwidth change for short content is handled during will economizing brief biography and sending out, above-mentioned method is comparatively effective.In addition, also can with 9: 00 later time band promptly, content BBB, a CCC that will be passed in this time band (the 2nd time band) of 9: 00 to 12: 00, DDD, EEE be as the alternative of maximum bitrate.
(execution mode 8)
Below, with reference to Figure 29 another embodiment of the present invention is described.Pass a system 11 with Figure 12 to content shown in Figure 15 and compare, the content of present embodiment passes the function difference that the difference of sending out system 11 only is bandwidth notice portion 44, and other structures are same.About with the structure described in the above-mentioned execution mode and handle identical structure and processing, give its identical label, and omit its explanation.
In the present embodiment, before the switching instant that the abundant bandwidth of storage switches in decision bandwidth storage part 47 arrived, bandwidth notice portion 44 judged that above-mentioned abundant bandwidth is will take place to increase or will reduce than current abundant bandwidth.If above-mentioned abundant bandwidth will increase, bandwidth notice portion 44 just before above-mentioned switching instant arrives, also have moment of stipulated time from this switching instant, be situated between by the abundant bandwidth of Department of Communication Force 33 after PLC main frame 15 notices increase.Thus, above-mentioned switching instant plays (the 2nd time band) during till next switching instant this, in each channel of pass sending out during the reception of content required necessary bandwidth can when above-mentioned switching instant, be guaranteed, therefore, can not stagnate and be received in reliably above-mentioned switching instant and begin to be passed the content of sending out.
On the other hand, if above-mentioned abundant bandwidth will reduce, bandwidth notice portion 44 just after above-mentioned switching instant arrives, have moment of stipulated time from this switching instant, be situated between by the abundant bandwidth of Department of Communication Force 33 after the 15 notice minimizings of PLC main frame.Thus, after above-mentioned switching instant, by the abundant bandwidth that reduces after preceding abundant bandwidth changes over minimizing.Therefore, passes till the above-mentioned switching instant content sent out can pass to it send out the finish time till, do not stagnate and receive reliably, can also not stagnate and receive reliably simultaneously the content of biography after the above-mentioned switching instant.
Figure 29 is that the content of present embodiment passes the process chart among the STB17 that sends out system 11.Compare with processing shown in Figure 13, the difference of processing shown in Figure 29 is to have omitted step S96, the substitute is execution in step S220 to S222.Other processing is same.
In step S220, bandwidth notice portion 44 judges whether next abundant bandwidth can increase than current abundant bandwidth.If above-mentioned next bandwidth can increase (being "Yes") in step S220, so when before the switching instant of next abundant bandwidth, when this switching instant also has the moment of stipulated time (for example 1 minute) to arrive, (in step S221, be "Yes"), bandwidth notice portion 44 just notifies the bit rate (necessary bandwidth) (step S97) of next content to PLC main frame 15.
On the other hand, if above-mentioned next bandwidth can reduce (being "No") in step S220, so when after the switching instant that arrives next abundant bandwidth, have the stipulated time from this switching instant in moment (being "Yes" in step S222) of (for example 1 minute after), bandwidth notice portion 44 just notifies the bit rate (necessary bandwidth) (step S97) of next content to PLC main frame 15.
In the example of Figure 14, fully bandwidth can be reduced to 9Mbps from 13Mbps at 8: 30, therefore, bandwidth notice portion 44 8: 30 for example after 1 minute promptly, 8: 31, notice PLC main frame 15 becomes 9Mbps to bandwidth settings.
In addition, fully bandwidth can increase to 12Mbps from 9Mbps at 11: 00, therefore, bandwidth notice portion 44 11: 00 for example before 1 minute promptly, 10: 59, notice PLC main frame 15 becomes 12Mbps to bandwidth settings.
At this, when after the user finishes the audiovisual of content, also continuing in the same channel of audiovisual to pass the content of sending out, if indifferent to, tend to switching channels at once and come other content of audiovisual this content.For example suppose that the user comes audio-visual content JJJ with channel CH3, continued audio-visual content KKK at 11: 00 then, but the user is indifferent to content KKK, therefore switching to channel CH1 at 11: 01 comes audio-visual content EEE.
When this situation, if content shown in Figure 28 passes the system 11 of sending out, bandwidth notice portion 44 can set bit rate for 11Mbps from 7Mbps at 10: 59 notice PLC main frames 15, and can set bit rate for 12Mbps from 11Mbps at 11: 01 notice PLC main frame 15.That is change to PLC main frame 15 bandwidth on demand for 2 times in, will be during 2 minutes.
To this, in the present embodiment, bandwidth notice portion 44 only sets bit rate for 12Mbps from 9Mbps at 10: 59 notice PLC main frames 15, therefore only asks 1 bandwidth change just can.
In addition, as mentioned above, bandwidth determination section 42 also can be among certain predetermined constantly all bit rate that will pass the content of sending out, and will carry out that the bit rate decision of gained is abundant bandwidth after the addition to maximum bitrate and second largest bit rate.At this moment, can not stagnate and receive to switch reliably before content and switch after content the two.
In addition, in the present embodiment, though judge that by bandwidth notice portion 44 above-mentioned abundant bandwidth can increase and can reduce, but also can judge by bandwidth determination section 42.Promptly, if above-mentioned abundant bandwidth can increase, the switching instant that bandwidth determination section 42 just will switch above-mentioned abundant bandwidth change over before this switching instant, also have moment of stipulated time from this switching instant, and the moment after changing is stored in decision bandwidth storage part 47; On the other hand, if above-mentioned bandwidth will reduce, the switching instant that bandwidth determination section 42 just will switch above-mentioned abundant bandwidth change over behind this switching instant, have moment of stipulated time from this switching instant, and the moment after changing is stored in decision bandwidth storage part 47.At this moment, though the processing of bandwidth determination section 42 can increase, can save the step S220 to S222 in the bandwidth notice portion 44.
The present invention is not limited to the respective embodiments described above, can carry out various variations according to the scope shown in the claim, suitably makes up the technological means of recording and narrating in the different execution modes and the execution mode that obtains also is contained within the technical scope of the present invention.
For example, in the above-described embodiment, though video content is illustrated, (Audio-Visual: audio frequency and video) other data such as content also can be applicable to the present invention for audio content, AV.
At last, each functional block of VoD server 12, PLC main frame 15 and STB17, particularly control part 31 can be made of hardware logic, also can realize with software by utilizing CPU.
That is, VoD server 12, PLC main frame 15 and STB17 have: CPU (the central processing unit: central processing unit) that carries out the control program command (CP command) be used to realize each function; ROM (the read only memory: read-only memory) of storage said procedure; Launch RAM (the random access memory: random access memory) of said procedure; Storage devices (recording medium) such as storage said procedure and various memory of data.In addition, provide recording medium to above-mentioned VoD server 12, PLC main frame 15 and STB17, this recording medium can be read and be recorded the program code (execute form program, intermediate code program, source program) of the control program of VoD server 12, PLC main frame 15 and STB17 by computer, described control program is the software that is used to realize above-mentioned functions, by read by the computer (or CPU, MPU) of VoD server 12, PLC main frame 15 and STB17 and the executive logging medium in the program code that write down, also can realize purpose of the present invention.
About aforementioned recording medium, for example can be the band class of tape, cartridge tape etc.; It also can be the dish class that comprises CDs such as disks such as floppy disk (registered trade mark), hard disk and CD-ROM, MO, MD, DVD, CD-R; Also can be card classes such as IC-card (comprising storage card), light-card; Or semiconductor memory class such as mask model ROM, EPROM, EEPROM, flash rom.
In addition, VoD server 12, PLC main frame 15 and STB17 also can connect communication network, and the said procedure code also can provide by means of communication network.About above-mentioned communication network, not special restriction, for example, can utilize the Internet (internet), Intranet (intranet), extranet (extranet), LAN, ISDN, VAN, CATV communication network, VPN (virtual private network) (virtualprivate network), phone loop line network, mobile communications network, satellite communication network etc.In addition, about transmission medium in order to the formation communication network, not special restriction, for example, wire communications such as IEEE1394, USB, power line transmission, cable TV loop line, telephone wire, ADSL loop line be can utilize, infrared ray, Bluetooth (registered trade mark), 802.11 radio communications, HDR, mobile telephone network, satellite loop line, received terrestrial digital broadcasting network radio communications such as (terrestrial digital net) also can be utilized such as IrDA or remote controller etc.In addition, even, realized the computer digit signal of the mounting of said procedure code by electric transmission in carrier wave, also can realize the present invention.
(industrial utilize possibility)
The present invention can carry out rapidly the switching of data, therefore is applicable to communicator, communication system, communication means, signal procedure and the recording medium that carries out data transmit-receive by network from server.
Claims (according to the modification of the 19th of treaty)
1. (revise afterwards) a kind of communicator, this communicator is connected with network, and is situated between by the network more than 1 that comprises this network, carries out the reception of data from server, and this communicator is characterised in that to possess:
Necessary bandwidth obtains the unit, respectively with regard to a plurality of data that become the object of above-mentioned reception, obtains the information of necessary bandwidth, and wherein, this necessary bandwidth is the bandwidth of the necessity when transmitting above-mentioned data;
The information of the obtained necessary bandwidth in unit is obtained according to above-mentioned necessary bandwidth in bandwidth decision unit, determines abundant bandwidth, and wherein, this abundant bandwidth is meant, all enough bandwidth when transmitting any one in a plurality of data of the object that becomes above-mentioned reception;
The bandwidth settings request unit to asking in order to manage the management devices that data transmit in the above-mentioned network, makes above-mentioned management devices set out the above-mentioned bandwidth decision abundant bandwidth that the unit determined.
2. (revise afterwards) communicator according to claim 1, it is characterized in that:
Also possess the setup unit that is used to set the 1st time band, wherein, the 1st time band has comprised current time;
The data conduct that above-mentioned bandwidth decision unit will can receive at above-mentioned the 1st time band that above-mentioned setup unit is set becomes the data of the object of above-mentioned reception, and determines above-mentioned abundant bandwidth.
3. (revise afterwards) communicator according to claim 2, it is characterized in that:
Above-mentioned setup unit is also set the 2nd time band, and wherein, it is elementary period that the 2nd time was with the moment after the tailend of being with above-mentioned the 1st time;
The data supplementing that above-mentioned bandwidth decision unit will can receive at above-mentioned the 2nd time band that above-mentioned setup unit is set is to become the data of the object of above-mentioned reception, and determine above-mentioned abundant bandwidth.
4. (revise afterwards) communicator according to claim 1, it is characterized in that:
Also possess setup unit, this setup unit is set the 1st time band that comprised current time and is the 2nd time band of elementary period with the moment after the tailend of above-mentioned the 1st time band;
The data conduct that above-mentioned bandwidth decision unit will can receive at above-mentioned the 2nd time band that above-mentioned setup unit is set becomes the data of the object of above-mentioned reception, and determines above-mentioned abundant bandwidth;
When bandwidth that above-mentioned abundant bandwidth is guaranteed in greater than above-mentioned the 1st time band, above-mentioned bandwidth settings request unit was asked above-mentioned management devices before the elementary period of above-mentioned the 2nd time band, made above-mentioned management devices set out above-mentioned abundant bandwidth.
5. (revise afterwards) communicator according to claim 1, it is characterized in that:
Also possess setup unit, above-mentioned setup unit is set the 1st time band that comprised current time and is the 2nd time band of elementary period with the moment after the tailend of above-mentioned the 1st time band;
The data conduct that above-mentioned bandwidth decision unit will can receive at above-mentioned the 2nd time band that above-mentioned setup unit is set becomes the data of the object of above-mentioned reception, and determines above-mentioned abundant bandwidth;
When bandwidth that above-mentioned abundant bandwidth is guaranteed in less than above-mentioned the 1st time band, above-mentioned bandwidth settings request unit was asked above-mentioned management devices after the tailend of above-mentioned the 1st time band, made above-mentioned management devices set out above-mentioned abundant bandwidth.
6. according to any described communicator in the claim 3 to 5, it is characterized in that:
Above-mentioned setup unit is respectively with regard to above-mentioned the 1st time band and band of above-mentioned the 2nd time, from the reception end predetermined instant of elementary period institute's data that can receive, the earliest moment is set at tailend.
7. according to any described communicator in the claim 3 to 6, it is characterized in that:
Above-mentioned setup unit is based on predetermined rule, to setting the elementary period and the tailend of the elementary period of above-mentioned the 1st time band and tailend, band of above-mentioned the 2nd time.
8. according to any described communicator in the claim 3 to 7, it is characterized in that:
Above-mentioned setup unit is set at the tailend of above-mentioned the 1st time band elementary period of above-mentioned the 2nd time band.
9. (revise afterwards) communicator according to claim 1, it is characterized in that:
Above-mentioned bandwidth decision unit with the 1st data and the 2nd data as, become the data of the object of above-mentioned reception, and determine above-mentioned abundant bandwidth, wherein, above-mentioned the 1st data are current data that just receiving, the predetermined data more than 1 that receive after the reception that above-mentioned the 2nd data are above-mentioned the 1st data finishes.
10. (revise afterwards) communicator according to claim 1, it is characterized in that:
Above-mentioned bandwidth decision unit with the 2nd data as, become the data of the object of above-mentioned reception, and determine above-mentioned abundant bandwidth, wherein, the reception that above-mentioned the 2nd data are the 1st data finishes the predetermined data more than 1 that receive in back, and the 1st data are current data that just receiving;
When the bandwidth guaranteed in the reception of above-mentioned abundant bandwidth greater than above-mentioned the 1st data, above-mentioned bandwidth settings request unit is before the reception of above-mentioned the 2nd data begins predetermined instant, above-mentioned management devices is asked, make above-mentioned management devices set out above-mentioned abundant bandwidth.
11. (revising the back) communicator according to claim 1 is characterized in that:
Above-mentioned bandwidth decision unit with the 2nd data as, become the data of the object of above-mentioned reception, and determine above-mentioned abundant bandwidth, wherein, the reception that above-mentioned the 2nd data are the 1st data finishes the predetermined data more than 1 that receive in back, and above-mentioned the 1st data are current data that just receiving;
When the bandwidth guaranteed in the reception of above-mentioned abundant bandwidth less than above-mentioned the 1st data, above-mentioned bandwidth settings request unit is after the reception of above-mentioned the 1st data finishes predetermined instant, above-mentioned management devices is asked, make above-mentioned management devices set out above-mentioned abundant bandwidth.
12., it is characterized in that according to any described communicator in the claim 9 to 11:
And then the predetermined data that receive after the reception that above-mentioned the 2nd data are above-mentioned the 1st data finishes.
13. (revising the back) communicator according to claim 1 is characterized in that:
Above-mentioned bandwidth decision unit will be obtained the corresponding data conduct of information of the obtained necessary bandwidth in unit with above-mentioned necessary bandwidth, become the data of the object of above-mentioned reception, and determine above-mentioned abundant bandwidth.
14. (revising the back) communicator according to claim 13 is characterized in that:
Above-mentioned bandwidth decision unit is from obtaining among the corresponding data of information of the obtained necessary bandwidth in unit with above-mentioned necessary bandwidth, and the data conduct that can receive from above-mentioned server becomes the data of the object of above-mentioned reception, and determines above-mentioned abundant bandwidth.
15. (revising the back) according to any described communicator in the claim 1 to 14, is characterized in that:
Above-mentioned bandwidth decision unit from the data of the object that becomes above-mentioned reception, the necessary bandwidth, with the necessary bandwidth of maximum as above-mentioned abundant bandwidth.
16. (revising the back) according to any described communicator in the claim 1 to 15, is characterized in that:
Above-mentioned bandwidth decision unit from the data of the object that becomes above-mentioned reception, the necessary bandwidth, with the necessary bandwidth of maximum and second largest necessary bandwidth and as above-mentioned abundant bandwidth.
17. a communication system is characterized in that possessing:
Network;
Be connected with this network, in order to manage the management devices that data in the above-mentioned network transmit;
Be connected with above-mentioned network, any described communicator in the claim 1 to 16.
18. communication system according to claim 17 is characterized in that:
Above-mentioned network is the network of power line transmission communication.
19. a data communication system is characterized in that possessing:
Server is situated between by the network of above-mentioned communication system, or is situated between by other networks different with the network of above-mentioned communication system, is connected with above-mentioned communication system, in order to transmit data to above-mentioned communicator.
(20. revising the back) a kind of control method of communication apparatus, wherein, above-mentioned communicator is connected with network, and is situated between by the network more than 1 that comprises this network, carries out the reception of data from server, and this control method of communication apparatus is characterised in that, comprising:
Necessary bandwidth obtains step, respectively with regard to a plurality of data that become the object of above-mentioned reception, obtains the information of necessary bandwidth, and wherein, this necessary bandwidth is the bandwidth of the necessity when transmitting above-mentioned data;
The bandwidth deciding step obtains the information of the necessary bandwidth that obtains in the step according to above-mentioned necessary bandwidth, determines abundant bandwidth, and wherein, this abundant bandwidth is meant, all enough bandwidth when transmitting any one in a plurality of data of the object that becomes above-mentioned reception;
The bandwidth settings request step to asking in order to manage the management devices that data transmit in the above-mentioned network, makes above-mentioned management devices set out the abundant bandwidth that is determined in the above-mentioned bandwidth deciding step.
21. a communication device control program, with so that in the claim 1 to 16 any described communicator move, this communication device control program is characterised in that:
Computer is played a role as above-mentioned each unit.
22. the recording medium of an embodied on computer readable is characterized in that:
Record the described communication device control program of claim 21.
Claims (22)
1. communicator, this communicator is connected with network, and is situated between by the network more than 1 that comprises this network, receives data from server, and this communicator is characterised in that to possess:
Related information is obtained the unit, with regard to a plurality of above-mentioned data, obtains the related information relevant with above-mentioned data, and wherein, above-mentioned related information includes the information of necessary bandwidth at least, and above-mentioned necessary bandwidth is the bandwidth of necessity when transmitting above-mentioned data;
The obtained related information in unit is obtained according to above-mentioned related information in bandwidth decision unit, determines abundant bandwidth, and wherein, above-mentioned abundant bandwidth is meant, all enough bandwidth when transmitting any one in the object data that becomes object;
The bandwidth settings request unit is to asking in order to manage the management devices that data transmit in the above-mentioned network, so that above-mentioned management devices is set out the above-mentioned bandwidth decision abundant bandwidth that the unit determined.
2. communicator according to claim 1 is characterized in that:
The setup unit that also possesses the 1st time of setting band, wherein, above-mentioned the 1st time band has comprised current time;
Above-mentioned bandwidth decision unit will be with the data that can receive as above-mentioned object data in above-mentioned the 1st time that above-mentioned setup unit is set, and determine above-mentioned abundant bandwidth.
3. communicator according to claim 2 is characterized in that:
Above-mentioned setup unit is also set the 2nd time band, wherein, and with the elementary period of the moment after the tailend of above-mentioned the 1st time band as above-mentioned the 2nd time band;
The data supplementing that above-mentioned bandwidth decision unit will can receive at above-mentioned the 2nd time band that above-mentioned setup unit is set is above-mentioned object data, and determines above-mentioned abundant bandwidth.
4. communicator according to claim 1 is characterized in that:
Also possess setup unit, this setup unit is set the 1st time band that comprised current time and is the 2nd time band of elementary period with the moment after the tailend of above-mentioned the 1st time band;
Above-mentioned bandwidth decision unit will be with the data that can receive as above-mentioned object data in above-mentioned the 2nd time that above-mentioned setup unit is set, and determine above-mentioned abundant bandwidth;
When bandwidth that above-mentioned abundant bandwidth is guaranteed in greater than above-mentioned the 1st time band, above-mentioned bandwidth settings request unit was asked above-mentioned management devices, so that above-mentioned management devices is set out above-mentioned abundant bandwidth before the elementary period of above-mentioned the 2nd time band.
5. communicator according to claim 1 is characterized in that:
Also possess in order to set the setup unit of the 1st time band and the 2nd time band, wherein, above-mentioned the 1st time band has comprised current time, and with the elementary period of the moment after the tailend of above-mentioned the 1st time band as above-mentioned the 2nd time band;
Above-mentioned bandwidth decision unit will be with the data that can receive as above-mentioned object data in above-mentioned the 2nd time that above-mentioned setup unit is set, and determine above-mentioned abundant bandwidth;
When above-mentioned abundant bandwidth was with the bandwidth of being guaranteed less than above-mentioned the 1st time, above-mentioned bandwidth settings request unit was asked above-mentioned management devices, so that above-mentioned management devices is set out above-mentioned abundant bandwidth after the tailend of above-mentioned the 1st time band.
6. according to any described communicator in the claim 3 to 5, it is characterized in that:
Above-mentioned setup unit is respectively with regard to above-mentioned the 1st time band and band of above-mentioned the 2nd time, from the reception end predetermined instant of elementary period institute's data that can receive, the earliest moment is set at tailend.
7. according to any described communicator in the claim 3 to 6, it is characterized in that:
Above-mentioned setup unit is based on predetermined rule, to setting the elementary period and the tailend of the elementary period of above-mentioned the 1st time band and tailend, band of above-mentioned the 2nd time.
8. according to any described communicator in the claim 3 to 7, it is characterized in that:
Above-mentioned setup unit is set at the tailend of above-mentioned the 1st time band elementary period of above-mentioned the 2nd time band.
9. communicator according to claim 1 is characterized in that:
Above-mentioned bandwidth decision unit with the 1st data and the 2nd data as above-mentioned object data, and determine above-mentioned abundant bandwidth, wherein, above-mentioned the 1st data are current data that just receiving, and above-mentioned the 2nd data are meant the predetermined data more than 1 that receive after the reception of above-mentioned the 1st data finishes.
10. communicator according to claim 1 is characterized in that:
Above-mentioned bandwidth decision unit as above-mentioned object data, and determines above-mentioned abundant bandwidth with the 2nd data, and wherein, above-mentioned the 2nd data are meant the predetermined data more than 1 that receive after the reception of the 1st data finishes, and above-mentioned the 1st data are current data that just receiving;
When the bandwidth guaranteed in the reception of above-mentioned abundant bandwidth greater than above-mentioned the 1st data, above-mentioned bandwidth settings request unit is before the reception of above-mentioned the 2nd data begins predetermined instant, above-mentioned management devices is asked, so that above-mentioned management devices is set out above-mentioned abundant bandwidth.
11. communicator according to claim 1 is characterized in that:
Above-mentioned bandwidth decision unit as above-mentioned object data, and determines above-mentioned abundant bandwidth to the 2nd data, and wherein, above-mentioned the 2nd data are meant the data more than 1 of predetermined reception after the reception of the 1st data finishes, and above-mentioned the 1st data are current data that just receiving;
When the bandwidth guaranteed in the reception of above-mentioned abundant bandwidth less than above-mentioned the 1st data, above-mentioned bandwidth settings request unit is after the reception of above-mentioned the 1st data finishes predetermined instant, above-mentioned management devices is asked, so that above-mentioned management devices is set out above-mentioned abundant bandwidth.
12., it is characterized in that according to any described communicator in the claim 9 to 11:
And then the predetermined data that receive after the reception that above-mentioned the 2nd data are above-mentioned the 1st data finishes.
13. communicator according to claim 1 is characterized in that:
The unit corresponding data of obtained related information will be obtained as above-mentioned object data with above-mentioned related information in above-mentioned bandwidth decision unit, and determine above-mentioned abundant bandwidth.
14. communicator according to claim 13 is characterized in that:
Above-mentioned bandwidth decision unit is from obtaining the corresponding data of the obtained related information in unit with above-mentioned related information, and the data that can receive from above-mentioned server are as above-mentioned object data, and determines above-mentioned abundant bandwidth.
15., it is characterized in that according to any described communicator in the claim 1 to 14:
Above-mentioned bandwidth decision unit from the necessary bandwidth of above-mentioned object data, with the necessary bandwidth of maximum as above-mentioned abundant bandwidth.
16., it is characterized in that according to any described communicator in the claim 1 to 15:
Above-mentioned bandwidth decision unit from the necessary bandwidth of above-mentioned object data, with the necessary bandwidth of maximum and second largest necessary bandwidth and as above-mentioned abundant bandwidth.
17. a communication system is characterized in that possessing:
Network;
Be connected with this network, in order to manage the management devices that data in the above-mentioned network transmit;
Be connected with above-mentioned network, any described communicator in the claim 1 to 16.
18. communication system according to claim 17 is characterized in that:
Above-mentioned network is the network of power line transmission communication.
19. a data communication system is characterized in that possessing:
Claim 17 or 18 described communication systems; And
Server is situated between by the network of above-mentioned communication system, or is situated between and is connected with above-mentioned communication system by other networks different with the network of above-mentioned communication system, in order to above-mentioned communicator transmission data.
20. a control method of communication apparatus, wherein, above-mentioned communicator is connected with network, and is situated between by the network more than 1 that comprises this network, receives data from server,
This control method of communication apparatus is characterised in that, comprising:
Related information is obtained step, with regard to a plurality of above-mentioned data, obtains the related information relevant with above-mentioned data, and wherein, above-mentioned related information includes the information of necessary bandwidth at least, and above-mentioned necessary bandwidth is the bandwidth of necessity when transmitting above-mentioned data;
The bandwidth deciding step obtains related information obtained in the step according to above-mentioned related information, determines abundant bandwidth, and wherein, above-mentioned abundant bandwidth is meant, all enough bandwidth when transmitting any one in the object data that becomes object;
The bandwidth settings request step is to asking in order to manage the management devices that data transmit in the above-mentioned network, so that above-mentioned management devices is set out the abundant bandwidth that is determined in the above-mentioned bandwidth deciding step.
21. a communication device control program, with so that in the claim 1 to 16 any described communicator move, this communication device control program is characterised in that:
Computer is played a role as above-mentioned each unit.
22. the recording medium of an embodied on computer readable is characterized in that:
Record the described communication device control program of claim 21.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007262666 | 2007-10-05 | ||
| JP2007-262666 | 2007-10-05 | ||
| PCT/JP2008/068046 WO2009044849A1 (en) | 2007-10-05 | 2008-10-03 | Communication device, its control method, communication system, data transmission system, communication device control program, and recording medium containing the program |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101816151A true CN101816151A (en) | 2010-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200880110165A Pending CN101816151A (en) | 2007-10-05 | 2008-10-03 | Communication device, its control method, communication system, data transmission system, communication device control program, and recording medium containing the program |
Country Status (3)
| Country | Link |
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| JP (1) | JP5107362B2 (en) |
| CN (1) | CN101816151A (en) |
| WO (1) | WO2009044849A1 (en) |
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| JP5364427B2 (en) * | 2009-04-16 | 2013-12-11 | 日本電信電話株式会社 | Network connection device and control method thereof |
| SG166701A1 (en) * | 2009-05-29 | 2010-12-29 | Yokogawa Electric Corp | Method and system for regulating bandwidth |
| JP6540469B2 (en) * | 2015-11-16 | 2019-07-10 | 株式会社リコー | Communication terminal, communication system, communication control method, and program |
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| JP2000173181A (en) * | 1998-12-04 | 2000-06-23 | Sony Corp | Data recording device and outputting device, data output system, methods for data recording and outputting, and data recording and outputting method |
| JP2002281451A (en) * | 2001-03-16 | 2002-09-27 | Canon Inc | Reproducing device, method and program for controlling reproducing device and computer readable storage medium |
| JP2006246395A (en) * | 2005-03-07 | 2006-09-14 | Fujitsu Ltd | Multicast proxy device |
| KR100677462B1 (en) * | 2005-06-23 | 2007-02-02 | 엘지전자 주식회사 | Bandwidth calculating system and method of mobile terminal for streaming service |
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2008
- 2008-10-03 WO PCT/JP2008/068046 patent/WO2009044849A1/en active Application Filing
- 2008-10-03 JP JP2009536097A patent/JP5107362B2/en not_active Expired - Fee Related
- 2008-10-03 CN CN200880110165A patent/CN101816151A/en active Pending
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| Publication number | Publication date |
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| JP5107362B2 (en) | 2012-12-26 |
| WO2009044849A1 (en) | 2009-04-09 |
| JPWO2009044849A1 (en) | 2011-02-10 |
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