CN104284206A - Video playing system, video transmission device and video playing device - Google Patents
Video playing system, video transmission device and video playing device Download PDFInfo
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- CN104284206A CN104284206A CN201310294606.6A CN201310294606A CN104284206A CN 104284206 A CN104284206 A CN 104284206A CN 201310294606 A CN201310294606 A CN 201310294606A CN 104284206 A CN104284206 A CN 104284206A
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- 238000012545 processing Methods 0.000 claims description 20
- 238000012937 correction Methods 0.000 claims description 11
- 238000007405 data analysis Methods 0.000 claims description 10
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- 230000010287 polarization Effects 0.000 claims description 9
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- 238000005070 sampling Methods 0.000 claims description 4
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- 238000005096 rolling process Methods 0.000 claims description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26258—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists for generating a list of items to be played back in a given order, e.g. playlist, or scheduling item distribution according to such list
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2385—Channel allocation; Bandwidth allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
- H04N21/2393—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests involving handling client requests
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- 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
- H04N21/43—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
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4383—Accessing a communication channel
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Computer Networks & Wireless Communication (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a video playing system, a video transmission device and a video playing device. The video playing system comprises a server and at least one client side device. The server obtains video transmission series flow from a signal source. The server and the client side device are connected in the local area network. The server obtains frequency point information from the video transmission series flow, channel recognition information corresponding to the frequency point information and modulating information of the frequency point information so that a channel parameter list comprising all channel data in the video transmission series flow can be generated. When the client side device sends a channel data request to the server, the server transmits the channel parameter list to the client side device so that the client side device can send a channel playing request to the server according to the channel parameter list, and accordingly a specific channel in the video transmission series flow is selected to be played.
Description
Technical field
The invention relates to a kind of audio/video player system, and relate to a kind of audio/video player system by the list of the direct acquisition in signal source channel parameter, video frequency transmitter and video play device especially.
Background technology
Satellite is to network technology (satellite-to-IP; SAT>IP, SAT-IP) programme content obtained from satellite can be converted to by SAT>IP standard the package meeting network convention, and allow various mobile device and digital household appliances (e.g., smart mobile phone, panel computer and intelligent television) all receive satellite programming by its wired or wireless home network compartment system by LAN.In other words, by the conversion of SAT>IP standard, TV programme more can be easily passed through network and carry out transmission between different platform and equipment and broadcasting.
The mode that the client terminal device of current SAT>IP technology obtains the rendition list can divide into two kinds.First kind of way is " searching for prefabricated frequency ", namely client terminal device according to its inner default each frequency (namely, prefabricated frequency) to SAT>IP server requirement channel parameter data wherein, server just can be searched in received signal crossfire, and passback corresponds to the parameter list of each channel of this frequency.Client terminal device can obtain the supplemental characteristic corresponding to each channel by this mode, but when client terminal device is for utilizing aforesaid way to obtain the channel parameter be positioned on numerous frequency, just need the transfer of data of carrying out once for each frequency between client terminal device and server, just can produce repeatedly transfer of data when frequency quantity is too much and expend long-time and shortcoming efficiency.The second way is then client downloads each channel made in addition parameter list by outer net remote server.But this kind of mode then needs to allow client terminal device can access outer net in addition.When outer net cannot link, client terminal device cannot obtain channel parameter list.In addition, when outer net be the developer of other countries but not home server time, channel parameter list may have inaccurate situation.Therefore, how to enable client fast and correctly obtain channel parameter list, having become the considerable subject under discussion in one, this area.
Summary of the invention
The invention provides a kind of audio/video player system, video frequency transmitter and video play device, directly obtain clear and definite channel parameter list by signal source and do not need by linking outer net or searching for prefabricated frequency, and then effectively promoting speed and correctness that client terminal device obtains channel parameter list.
The present invention proposes a kind of audio/video player system, its server from signal source obtain transmission of video crossfire and with client terminal device interconnecting line LAN.Server obtains channel identification information corresponding to frequency point information, each frequency point information and its modulation intelligence from transmission of video crossfire, to produce the channel parameter list possessing each channel data in transmission of video crossfire.When client terminal device sends channel data request to server, channel parameter list transfers to and makes client terminal device by server, to make client terminal device can send channel playing request according to channel parameter list to server, thus select the specific channel in transmission of video crossfire and play.
In one embodiment of this invention, above-mentioned channel parameter list comprises channel identification information corresponding to the identification code in signal source, frequency point information, each frequency point information, and the modulation intelligence in signal source.
In one embodiment of this invention, above-mentioned channel identification information comprises program identification code (Packet Identifier; PID), Program Association Table (Program Association Table; PAT), Program Map Table (Program Map Table; And the various parameters of video and audio frequency stream data PMT).
In one embodiment of this invention, above-mentioned each frequency point information comprises the bandwidth information of characteristic frequency and correspondence.
In one embodiment of this invention, above-mentioned signal source for satellite television broadcasting (DVB-S) and second generation satellite television broadcasting (DVB-S2) one of them time, wherein channel parameter list more comprises preposition identifier (frontend identifier), polarization (polarisation) information, sampling rate (symbol rate) and forward error correction (Forward Error Correction, FEC) parameter.
In one embodiment of this invention, when above-mentioned signal source is for second generation satellite television broadcasting, wherein channel parameter list more comprises and rolls down (roll-off) information and pilot tone (pilot tone) parameter.
In one embodiment of this invention, above-mentioned signal source for ground TV broadcast (DVB-T) and second generation ground TV broadcast (DVB-T2) one of them time, wherein channel parameter list more comprises transmission mode (transmission mode) parameter, guard interval (guard interval) parameter and forward error correction parameter.
In one embodiment of this invention, when above-mentioned signal source is for second generation ground TV broadcast, wherein channel parameter list more comprises physical layer pipe (physical layer pipes; PIP) parameter, second generation terrestrial broadcast system identification code, single-input single-output (single-input single-output; SISO) with multiple input single output (multiple-input single-output; MISO) handoff parameter.
In one embodiment of this invention, above-mentioned server selects the kind in signal source according to user end apparatus demand, or the transmission of video crossfire integrating to obtain compound is carried out in multi-signal source.
In one embodiment of this invention, above-mentioned server is box on a digital television.
In one embodiment of this invention, above-mentioned client terminal device be possess link LAN function mobile device, computer installation and another digital television on box one of them.
The present invention proposes a kind of video frequency transmitter, and it comprises signal source receiving element, network connection unit and data processing unit.Signal source receiving element is from signal source receiver, video transmission stream.Network connection unit by LAN with at least one client terminal device line.Data processing unit couples signal source receiving element unit connected to the network, in order to resolve transmission of video crossfire to obtain channel identification information corresponding to frequency point information, each frequency point information and its modulation intelligence, use and produce and store the video parameter list possessing each channel data in transmission of video crossfire.When client terminal device sends channel data request to video frequency transmitter, channel parameter list is transferred to client terminal device by data processing unit, to make client terminal device send channel playing request according to channel parameter list to video frequency transmitter, thus select the specific channel in this transmission of video crossfire and play.
The invention provides a kind of video play device, it comprises client network linkage unit and Data Analysis unit.Client network linkage unit is by LAN and video frequency transmitter line, and video frequency transmitter is from signal source receiver, video transmission stream.Data Analysis unit couples client network linkage unit, in order to send channel data request to video frequency transmitter, and receive from video frequency transmitter the channel parameter list possessing each channel data this transmission of video crossfire, according to channel parameter list, channel playing request is sent to video frequency transmitter, thus select the specific channel in transmission of video crossfire and play, wherein channel parameter list comprises channel identification information corresponding to the frequency point information in transmission of video crossfire, each frequency point information and its modulation intelligence.
Based on above-mentioned, the server of the embodiment of the present invention (also referred to as, video frequency transmitter) transmission of video crossfire can be obtained from signal source, and the channel data of all frequencies is obtained from transmission of video crossfire, use and produce corresponding channel parameter list.By this, when client terminal device (also referred to as, video play device) when sending channel data request to server, client terminal device can from server fast and correctly obtain channel parameter list, and play the program of institute for watching according to channel parameter list, and do not need by linking outer net or searching for prefabricated frequency, so just effectively can promote speed and correctness that client terminal device obtains channel parameter list.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate institute's accompanying drawings to be described in detail below.
Accompanying drawing explanation
Fig. 1 is the calcspar of the audio/video player system according to this case one embodiment.
The operational flowchart that Fig. 2 is the video frequency transmitter that illustrates according to this case one embodiment and video transmission method thereof.
The operational flowchart that Fig. 3 is the video play device that illustrates according to this case one embodiment and video broadcasting method thereof.
The overall operation flow chart of audio/video player system of Fig. 4 for illustrating according to this case one embodiment.
[symbol description]
10: audio/video player system
100: signal is originated
110: server/video frequency transmitter
112: signal source receiving element
114: network connection unit
116: data processing unit
118: data storage element
120: client terminal device/video play device
122: client network linkage unit
124: Data Analysis unit
130: the second client terminal devices/video play device
S210 ~ S350: step
Embodiment
The audio/video player system that the embodiment of the present invention proposes directly can obtain clear and definite channel parameter list by signal source, and in user's wish uses multiple playing device displaying video when, can accurately and efficiently realize application or the related needs of displaying video.Evidence the present invention is used in the various citings below proposing to meet embodiment of the present invention spirit, but application the present embodiment person only should not be limited to the citing of the present embodiment.
Fig. 1 is the calcspar of the audio/video player system 10 according to this case one embodiment.Please refer to Fig. 1, audio/video player system 10 comprises a video frequency transmitter 110 and at least one video play device, the video play device 120,130 gone out as shown in Figure 1.The video frequency transmitter 110 of the present embodiment can serve one or more video play device 120,130.That is, video frequency transmitter 110 can serve multiple video play device, and these video play devices can simultaneously by meeting video frequency transmitter 110 described in the embodiment of the present invention and corresponding step flow process is play from the TV programme received by signal source 100.In the present embodiment, video frequency transmitter 110 is connected to video play device 120,130 respectively by LAN.In embodiments of the present invention, video frequency transmitter 110 also can be called server 110, and video play device 120,130 also can be called it is client terminal device 120 and the second client terminal device 130 in the present embodiment, uses and more clearly demonstrates the present embodiment.
Audio/video player system 10 can be such as digital television system or home entertainment system.Video frequency transmitter 110 is such as box on digital television (Set-top-box) or computer.Video play device 120,130 possesses the function connecting this LAN, and video play device 120,130 can be such as box on mobile device, computer installation or digital television.Video play device 120,130 can be respectively box on different types of digital television.But application the present embodiment person appropriately according to its implementation should adjust the application apparatus adopted, and is not limited at this.
Video frequency transmitter 110 comprises signal source receiving element 112, network connection unit 114, data processing unit 116 and data storage element 118.Signal source receiving element 112 is in order to 100 receiver, video transmission streams of originating from signal.Due to the wide variety in signal source 100, therefore " transmission of video crossfire " herein can be the various message and the video streams that meet digital video broadcast standard, satellite, terrestrial broadcasting and the cable television network standards such as such as DVB-S/S2, DVB-T/T2, DVB-C, ISDB-T, but be also not only limited to the above digital video broadcast standard exemplified, also can realize with other relevant TV broadcast agreements.The signal source receiving element 112 of the present embodiment can be the antenna of box on machine, cable or other coherent signal access devices.Network connection unit 114 by LAN with at least one video play device line.The network connection unit 114 of the present embodiment can be wired network adapter, wireless network card or relevant device.For example, video play device 120 by client network linkage unit 122 with the line of video frequency transmitter 110.Data processing unit 116 resolves above-mentioned transmission of video crossfire, use each channel data in acquisition transmission of video crossfire and produce corresponding channel parameter list, further, video frequency transmitter 110 can also comprise a data storage element 118, in order to store above-mentioned channel parameter list.The data processing unit 116 of the present embodiment can be controller or processor, data storage element 118 can be then hard disc or other there is the memory device of memory function.
On the other hand, video play device 120 comprises client network linkage unit 122 and Data Analysis unit 124.Client network linkage unit 122 can be wired network adapter, wireless network card or relevant device, and in order to video frequency transmitter 110 line.Data Analysis unit 124 can be controller or the processor of client, and in order to resolve the channel parameter list received from video frequency transmitter 110.
In the present embodiment, the video transmission technologies that the flow chart of Fig. 2 to Fig. 4 and schematic diagram illustrate audio/video player system 10 in more detail and realize can be utilized.In detail, Fig. 2 is the operational flowchart of video frequency transmitter and the video transmission method thereof illustrated according to this case one embodiment, Fig. 3 is the operational flowchart of video play device and the video broadcasting method thereof illustrated according to this case one embodiment, and Fig. 4 is the overall operation flow chart of the audio/video player system illustrated according to this case one embodiment.The video frequency transmitter 110 illustrated in Fig. 2 embodiment and the video play device 120 in the embodiment of Fig. 3 are applicable to the overall operation flow process of the audio/video player system that Fig. 4 embodiment illustrates.Further, the overall operation flow process of Fig. 4 embodiment is applicable to the audio/video player system 10 of Fig. 1, in other words, in Fig. 2 embodiment, in the operating process of video frequency transmitter 110 and Fig. 3 embodiment, the operating process of video play device 120 is also applicable to the audio/video player system 10 of Fig. 1.Below namely to arrange in pairs or groups audio/video player system 10, and the Detailed operating procedures of the audio/video player system of first embodiment of the invention is described by video frequency transmitter wherein 110 and video play device 120.
Referring to Fig. 1 and Fig. 4, and the operating process of the video play device 120 of the video frequency transmitter 110 of the Fig. 2 that arranges in pairs or groups and Fig. 3.First, in step S210, video frequency transmitter 110 receives the transmission of video crossfire from signal source 100 by signal source receiving element 112.As previously mentioned, this signal source 100 can be satellite television broadcasting (DVB-S), second generation satellite television broadcasting (DVB-S2), the digital video broadcast standards such as ground TV broadcast (DVB-T) or second generation ground TV broadcast (DVB-T2), application the present embodiment person can make signal source receiving element 112 select different types of signal to originate 100 according to the demand of client (video play device), or the transmission of video crossfire used and obtain compound is carried out integrating in these multiple signals source 100, and then allow different video play devices (such as 120 and 130) that such as primary and secondary screen or other modes can be utilized to watch the TV signal in unlike signal source 100 simultaneously, do not limited at this.
In step S220, data processing unit 116 resolves transmission of video crossfire to obtain channel identification information corresponding to frequency point information, each frequency point information and its modulation intelligence, to produce the channel parameter list possessing each channel data in this transmission of video crossfire.Further, in step S230, processed complete channel parameter list is stored in data storage element 118 by data processing unit 116.This channel parameter list comprises channel identification information corresponding to the identification code in signal source, frequency point information, each frequency point information and its modulation intelligence.Below list the detailed description of above-mentioned each channel parameter.
The identification code in signal source is in order to identify the signal source 100 of audio/video player system 10.Frequency point information comprises the bandwidth information of characteristic frequency and correspondence.Moreover the present embodiment can give corresponding numbering to each characteristic frequency, it is frequency that this numbering just can be described as.For example, when frequency is an interval with 200kHz and by frequency separation for 890MHz, 890.2MHz, 890.4MHz ... 915MHz, is divided into 125 radio bands by this and these radio bands just can be given 1,2,3 ... the numbering of 125.The bandwidth information corresponding with frequency then can the frequency range of channel search number in order to provide near described frequency.
Channel identification information corresponding to each frequency point information then can comprise the various parameters of program identification code (PID), Program Association Table (PAT), Program Map Table (PMT) and video and audio frequency stream data.Program identification code is in order to identify dissimilar packet, and such as, in digital video broadcast system, program identification code is to indicate the type of described packet by the numeral of 13 bits.Program Map Table lists programs all in transmission of video crossfire, and provides the program identification code representing the Program Map Table form that each program is corresponding.Program Map Table lists the identification descriptor (descriptor, the such as identification code of IP/MAC platform) of the classification of each basic crossfire that a program comprises, program identification code and other data of description broadcast.Then comprise in order to represent the modulating system that audio/video player system 10 adopts as the modulation intelligence that each frequency point information is corresponding, or to the modulation system that the signal from signal source 100 uses.For example, when signal source 100 is second generation satellite television broadcasting, its modulating system parameter (Modulation system) can be set as with the relevant parameter of second generation satellite television broadcasting, such as, be " dvbs2 ".Again such as to the modulation system of second generation satellite television broadcasting signal, then can use such as quarternary phase-shift keying (QPSK) (quadrature phase shift keying; QPSK) technology or eight phase phase shift keyings (eight phase shift keying; 8PSK) technology.
It is worth mentioning that, when signal source is different, the channel parameter list that data processing unit 116 produces after completing parsing transmission of video crossfire more can comprise other channel parameters.This type of situation has more detailed explanation by embodiment afterwards, refers to aftermentioned.
Video frequency transmitter 110 will detect the channel data request (step S240) whether existed from video play device 120.When video play device 120 transmits channel transmission request to video frequency transmitter 110(step S310), and video frequency transmitter 110 judges have when receiving above-mentioned transmission of video request, data processing unit 116 then in data transmission device 110 will encapsulate channel parameter list, and the channel parameter list after encapsulation is transferred to video play device 120(step S250).And if data transmission device 110 there is no the channel data request received from video play device 120, after one section of Preset Time (step S280), video frequency transmitter 110 also can repeat the step of above-mentioned S210 to S230 voluntarily, use regular update and be stored in channel parameter list in data storage element 118, as shown in Figure 2.
In addition, in other embodiments, if video frequency transmitter 110 there is no the channel data request received from video play device 120, video frequency transmitter 110 also can not upgrade the channel parameter list be stored in data storage element 118, application the present embodiment person should select whether upgrade channel parameter list according to its demand, is not limited at this.
Then, in step S320, video play device 120 judges whether to receive the channel parameter list from video frequency transmitter 110.When video play device 120 judges to receive channel parameter list, then in step S330, the Data Analysis unit 124 in video play device 120 will resolve the channel parameter list that also decapsulation receives.
Afterwards, in step S340, video play device 120 will send channel playing request according to channel parameter list to video frequency transmitter 110.When video frequency transmitter 110 judges whether to receive the video playback request (step S260) from video play device 120, and after determining to receive described video playback request, the program crossfire of the specific channel in transmission of video crossfire is transferred to video play device 120(step S270 by video frequency transmitter 110), and play (step S350) received the program crossfire of described specific channel by video play device 120 after.In the present embodiment, if video frequency transmitter 110 does not receive channel playing request, then after one section of Preset Time (step S280), video frequency transmitter 110 will repeat the step of above-mentioned S210 to S230 voluntarily, uses regular update and is stored in channel parameter list in data storage element 118.In another embodiment, when video frequency transmitter 110 does not receive video playback request, video frequency transmitter 110 also can not upgrade the channel parameter list be stored in data storage element 118, application the present embodiment person should select whether upgrade channel parameter list according to its demand, is not limited at this.
Directly obtained the mode of channel parameter list by signal source by above-mentioned video frequency transmitter, audio/video player system of the present invention can not need to utilize other mechanism (such as searching for prefabricated frequency) or be connected to external network to obtain the program list information made in addition, and client terminal device can be made to obtain channel parameter list accurately rapidly.
In addition, as previously mentioned, when the signal source of Video transmission system is different, channel parameter list may comprise other channel parameters.The situation that will be satellite television broadcasting or second generation satellite television broadcasting to signal source below, and signal source for ground TV broadcast or two generation ground TV broadcast situation describe in detail respectively.
Table (1)
Upper table (1) is the channel parameter list according to one embodiment of the invention, and it lists the scope of application of each parameter name and correspondence thereof.Please refer to table (1), the signal source of the present embodiment is satellite television broadcasting or second generation satellite television broadcasting, and is applicable to the audio/video player system 10 of Fig. 1 and the overall operation flow process of audio/video player system in Fig. 4.The present embodiment is similar to the aforementioned embodiment, and therefore same action mode and explanation repeat no more.Its difference is, when signal source is for satellite television broadcasting or second generation satellite television broadcasting, data processing unit 116 in video frequency transmitter 110 resolves the frequency point information in described signal source 100, and produces corresponding channel parameter list and more will comprise preposition identifier, polarization information, sampling rate and forward error correction parameter.In the present embodiment, preposition identifier with between 1 to 65535 numeric representation.The polarizations mode of polarization information in order to provide signal to originate, can comprise horizontal linear polarization, vertical line polarization, left-hand circular polarization and right-handed circular polarization.And sampling rate determines the levels of precision of signal, and the numerical value in units of kSymb/s represents.Be then prevent error code and the control errors that adds in original signal is digital as forward error correction parameter, use and realize automatic error-correcting and and then improve the reliability of Signal transmissions.In the present embodiment, the pattern of forward error correction parameter can be 12,23,34,56,78,89,35,45 and 910.
It is worth mentioning that, when signal source 100 is second generation satellite television broadcasting, data processing unit 116 in video frequency transmitter 110 resolves the frequency point information in described signal source 100, and produce corresponding channel parameter list and more will comprise the information of rolling down and pilot tone parameter, the information that wherein rolls down is with numeric representation and can be set to 0.35,0.25 or 0.20, in order to the characteristic frequency as benchmark when pilot tone parameter is then modulation signal, and can be divided into have pilot tone with without pilot tone two kinds of patterns, as shown shown in (1).
Table (2)
Upper table (2) is the channel parameter list according to another embodiment of the present invention, and it lists the scope of application of each parameter name and correspondence thereof.Please refer to table (2), the signal source of the present embodiment is ground TV broadcast or second generation ground TV broadcast, and is applicable to the audio/video player system 10 of Fig. 1 and the overall operation flow process of audio/video player system in Fig. 4.The present embodiment is similar to the various embodiments described above, and therefore same action mode and explanation repeat no more.Its difference is, when signal source is for ground TV broadcast or second generation ground TV broadcast, data processing unit 116 in video frequency transmitter 110 resolves the frequency point information in described signal source 100, and produces corresponding channel parameter list and more will comprise transmission mode parameter, guard spacing parameter and forward error correction parameter.In the present embodiment, transmission mode parameter is in order to represent the carrier number in orthogonal frequency-division multiplex singal frame, and it can be 2k, 4k, 8k, 1k, 16k and 32k.Guard spacing parameter can be 14,18,116,132,1128,19128 and 19256.The control errors that forward error correction parameter then adds in original signal in order to prevent error code is digital, uses and realizes automatic error-correcting and and then the reliability of raising Signal transmissions.In the present embodiment, the pattern of forward error correction parameter can be 12,35,23,34,45,56 and 78.
It is worth mentioning that, when signal source 100 is second generation ground TV broadcast, data processing unit 116 in video frequency transmitter 110 resolves the frequency point information in described signal source 100, and produces corresponding channel parameter list and more will comprise physical layer pipe parameter, second generation terrestrial broadcast system identification code, single-input single-output and multiple input single output handoff parameter.Physical layer pipe parameter is in order to identify each physical layer pipe.Second generation terrestrial broadcast system identification code is the second generation terrestrial broadcast system belonging to what type in order to identification signal source 100.The handoff parameter of single-input single-output and multiple input single output is then the pattern being represented constrained input by a numerical value, and be expressed as multiple input single output when described numerical value is 1,0 is then expressed as single-input single-output.
According to above-mentioned explanation, when the signal source of the Video transmission system in the present embodiment is different, can directly obtain channel parameter list by signal source and effectively promote speed and the correctness that client terminal device obtains channel parameter list equally, the difference in wherein said channel parameter list basis signal source and different channel datas can be possessed.
With another viewpoint, the present invention proposes a kind of video frequency transmitter, and it is applicable to above-mentioned audio/video player system.Video frequency transmitter comprises signal source receiving element, network connection unit and data processing unit.Signal source receiving element is such as the antenna of box on machine.Network connection unit is such as wired network adapter, wireless network card or relevant device.Data processing unit is such as controller in server or processor.By the start of each parts of this video frequency transmitter, the operating process of server in above-mentioned audio/video player system can be completed.Because the present embodiment is similar to the various embodiments described above, therefore same action mode and explanation repeat no more.
With another viewpoint, the present invention proposes a kind of video play device, and it is applicable to above-mentioned audio/video player system.Video play device comprises client network linkage unit and Data Analysis unit.Client network linkage unit is such as wired network adapter, wireless network card or relevant device.Data Analysis unit is such as controller or the processor of client.By the start of each parts of this video play device, the operating process of client terminal device in above-mentioned audio/video player system can be completed.Because the present embodiment is similar to the various embodiments described above, therefore same action mode and explanation repeat no more.
In sum, audio/video player system of the present invention, video frequency transmitter and video play device, it obtains transmission of video crossfire by video frequency transmitter from signal source, and from transmission of video crossfire, obtains the channel data of all frequencies, to produce corresponding channel parameter list.Particularly, when signal source is unique, video frequency transmitter produce corresponding channel parameter list and can comprise different channel datas.By this, when video play device sends channel data request to video frequency transmitter, video play device can from video frequency transmitter fast and correctly obtain channel parameter list, and according to channel parameter list, channel playing request is sent to video frequency transmitter, use select institute for watch channel and play, and do not need by linking outer net or searching for prefabricated frequency, so just effectively can promote speed and correctness that video play device obtains channel parameter list.In addition, audio/video player system of the present invention is also applicable to the situation that video frequency transmitter serves multiple video play device.
Although the present invention discloses as above with embodiment; so itself and be not used to limit the present invention; have in any art and usually know the knowledgeable; without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is when being as the criterion depending on the accompanying claim person of defining.
Claims (18)
1. an audio/video player system, is characterized in that, comprising:
Server, obtains transmission of video crossfire from signal source; And
At least one client terminal device, wherein this server and this at least one client terminal device interconnecting line in LAN,
Wherein, this server obtains channel identification information corresponding to frequency point information, each frequency point information and its modulation intelligence from this transmission of video crossfire, to produce the channel parameter list possessing each channel data in this transmission of video crossfire, when this client terminal device sends channel data request to this server, this channel parameter list is transferred to this at least one client terminal device by this server, to make this client terminal device send channel playing request according to this channel parameter list to this server, thus select the specific channel in this transmission of video crossfire and play.
2. audio/video player system as claimed in claim 1, is characterized in that, wherein this channel parameter list comprises the modulation intelligence in channel identification information corresponding to the identification code in this signal source, this frequency point information, each frequency point information, this signal source.
3. audio/video player system as claimed in claim 2, it is characterized in that, wherein this channel identification information comprises the various parameters of program identification code, Program Association Table, Program Map Table and video and audio frequency stream data.
4. audio/video player system as claimed in claim 2, it is characterized in that, wherein each frequency point information comprises the bandwidth information of characteristic frequency and correspondence.
5. audio/video player system as claimed in claim 2, it is characterized in that, when this signal source for satellite television broadcasting and second generation satellite television broadcasting one of them time, wherein this channel parameter list more comprises preposition identifier, polarization information, sampling rate and forward error correction parameter.
6. audio/video player system as claimed in claim 5, is characterized in that, when this signal source is for second generation satellite television broadcasting, wherein this channel parameter list more comprises the information of rolling down and pilot tone parameter.
7. audio/video player system as claimed in claim 2, it is characterized in that, when this signal source for ground TV broadcast and second generation ground TV broadcast one of them time, wherein this channel parameter list more comprises transmission mode parameter, guard spacing parameter and forward error correction parameter.
8. audio/video player system as claimed in claim 7, it is characterized in that, when this signal source is for second generation ground TV broadcast, wherein this channel parameter list more comprises physical layer pipe parameter, second generation terrestrial broadcast system identification code, single-input single-output and multiple input single output handoff parameter.
9. audio/video player system as claimed in claim 1, is characterized in that, this server selects the kind in signal source according to user end apparatus demand, or the transmission of video crossfire integrating to obtain compound is carried out in multi-signal source.
10. audio/video player system as claimed in claim 1, it is characterized in that, this server is box on digital television.
11. audio/video player systems as claimed in claim 1, is characterized in that, this client terminal device be possess to link on the mobile device of this LAN function, computer installation and another digital television box one of them.
12. 1 kinds of video frequency transmitters, is characterized in that, comprising:
Signal source receiving element, from signal source receiver, video transmission stream;
Network connection unit, by LAN with at least one client terminal device line; And
Data processing unit, couple this signal source receiving element and this network connection unit, resolve this transmission of video crossfire to obtain channel identification information corresponding to frequency point information, each frequency point information and its modulation intelligence, to produce and to store the channel parameter list possessing each channel data in this transmission of video crossfire
Wherein, when this at least one client terminal device sends channel data request to this video frequency transmitter, this channel parameter list is transferred to this at least one client terminal device by this data processing unit, to make this at least one client terminal device send channel playing request according to this channel parameter list to this video frequency transmitter, thus select the specific channel in this transmission of video crossfire and play.
13. video frequency transmitters as claimed in claim 12, is characterized in that, wherein this channel parameter list comprises the modulation intelligence in channel identification information corresponding to the identification code in this signal source, this frequency point information, each frequency point information, this signal source.
14. video frequency transmitters as claimed in claim 13, it is characterized in that, wherein this channel identification information comprises the various parameters of program identification code, Program Association Table, Program Map Table and video and audio frequency stream data.
15. video frequency transmitters as claimed in claim 12, is characterized in that, more comprise:
Data storage element, couple and this data processing unit controlled to store this channel parameter list.
16. video frequency transmitters as claimed in claim 12, wherein this signal source receiving element selects the kind in signal source according to this user end apparatus demand, or the transmission of video crossfire integrating to obtain compound is carried out in multi-signal source.
17. 1 kinds of video play devices, is characterized in that, comprising:
Client network linkage unit, by LAN with video frequency transmitter line, wherein this video frequency transmitter is from signal source receiver, video transmission stream; And
Data Analysis unit, couple this client network linkage unit, this Data Analysis unit sends channel data request to this video frequency transmitter, and receive from this video frequency transmitter the channel parameter list possessing each channel data this transmission of video crossfire, according to this channel parameter list, channel playing request is sent to this video frequency transmitter, thus select the specific channel in this transmission of video crossfire and play
Wherein this channel parameter list comprises channel identification information corresponding to the frequency point information in this transmission of video crossfire, each frequency point information and its modulation intelligence.
18. video play devices as claimed in claim 17, it is characterized in that, wherein this channel identification information comprises the various parameters of program identification code, Program Association Table, Program Map Table and video and audio frequency stream data.
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| CN104284206B (en) | 2018-03-23 |
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