Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
  • H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
  • H04H60/14—Arrangements for conditional access to broadcast information or to broadcast-related services
  • H04H60/21—Billing for the use of broadcast information or broadcast-related information
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
  • H04H20/65—Arrangements characterised by transmission systems for broadcast
  • H04H20/76—Wired systems
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
  • H04H20/65—Arrangements characterised by transmission systems for broadcast
  • H04H20/76—Wired systems
  • H04H20/77—Wired systems using carrier waves
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N7/00—Television systems
  • H04N7/10—Adaptations for transmission by electrical cable
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N7/00—Television systems
  • H04N7/16—Analogue secrecy systems; Analogue subscription systems
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N7/00—Television systems
  • H04N7/22—Adaptations for optical transmission
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q11/00—Selecting arrangements for multiplex systems
  • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
  • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
  • H04Q11/0478—Provisions for broadband connections
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L12/00—Data switching networks
  • H04L12/54—Store-and-forward switching systems 
  • H04L12/56—Packet switching systems
  • H04L12/5601—Transfer mode dependent, e.g. ATM
  • H04L2012/5603—Access techniques
  • H04L2012/5609—Topology
  • H04L2012/561—Star, e.g. cross-connect, concentrator, subscriber group equipment, remote electronics
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L12/00—Data switching networks
  • H04L12/54—Store-and-forward switching systems 
  • H04L12/56—Packet switching systems
  • H04L12/5601—Transfer mode dependent, e.g. ATM
  • H04L2012/5638—Services, e.g. multimedia, GOS, QOS

Definitions

• the present invention relates to a wide-area broadcast communication system that uses a wide-area communication network such as a broadband ISDN.
• ISDN Integrated Services Digital Network
• N—ISDN N arrowband ISDN
• B—ISDN Br 0 adband ISD
• N-ISDN has been put into practical use at present and various services are provided, but services using B-ISDN are still in the research stage, and specific There are few examples of simple applications No.
• the current moving image service is the power represented by TV broadcasts, and this service is provided mainly in the Tokyo metropolitan area. I can only see a part of it. Also, TV broadcasts produced by local broadcasters can only be seen in the local area. Many locals working for companies in the Tokyo metropolitan area can only find out about their hometown by local news broadcasted by broadcasting stations in the Tokyo metropolitan area. In this way, current TV broadcasts do not always show the same programs in all parts of the country, and cannot provide services biased to the Tokyo metropolitan area.
• the present invention has been made to address the above circumstances, and an object of the present invention is to provide a broadcast communication system capable of uniformly receiving multi-channel video anywhere. .
• a broadcast communication system is connected to a collection network for collecting broadcast signals transmitted from a plurality of broadcast stations, and to a subscriber network. And a distribution network having a distribution node for selecting a desired broadcast signal and distributing the selected broadcast signal to a subscriber network.
• broadcast signals transmitted from a plurality of broadcast stations are collectively collected by a collection network, and the collected plurality of broadcast signals are all distributed via a distribution network. Since the broadcast signal is distributed to the nodes and the desired broadcast signal is selected by the subscriber and transmitted to the subscriber network, the subscriber connected to the distribution node can be connected to the collection network. All collected broadcasts can be received equally.
• FIG. 1 is a block diagram of a first embodiment of a broadcast communication system according to the present invention.
• Fig. 2 is a block diagram of the first embodiment when the collection network is a ring or loop network.
• FIG. 3 is a block diagram showing an example of a distribution node in the distribution network of the first embodiment.
• FIG. 4 is a block diagram showing an example of a video package library in the distribution node of FIG. 3,
• Figure 5 is a diagram showing an example of the information transfer format in the main broadcast communication system.
• FIGS. 6A and 6B are diagrams showing an example of a cell transfer format in the broadcast communication system.
• Fig. 7 is a block diagram showing an example of the subscriber network shown in Fig. 3
• Fig. 8 is a diagram showing an example of the usage status of frequency bands in the subscriber network.
• FIG. 9 is a diagram showing an example of use of a channel in the present invention.
• Figure 10 is a characteristic diagram for explaining optical wavelength division multiplexing in the communication network of this system.
• FIG. 1 is a block diagram of a first embodiment of a broadcast communication system according to the present invention.
• the contents of the video information include public broadcasters, T broadcasts currently provided by private broadcasters irrespective of the metropolitan area, and the local areas.
• V broadcast programs remote reception of lectures such as universities and private supplementary schools, re-reception of TV broadcasts produced by the government or government offices or local governments, corporate broadcasts, overseas broadcasts, etc. You.
• a large number of broadcasting stations 108 for transmitting these programs are connected to one collection network 100.
• the broadcasting stations 108 scattered in various places are connected to the collection transmission line 103 through the nearest cross-connect device 102.
• the broadcasting station 108 is an information provider including a video maker.
• the content of the program is not limited to video but also includes data information such as teletext.
• the capacity of the collection transmission line 103 can be arbitrarily selected, but is set to 1 OG bps for the following reasons.
• Broadcast stations created by broadcasters 108 or information providers (considered synonymous with power broadcasters 108 not shown in FIG. 1) in various locations are economically From an objective point of view, it can be mounted on a collection transmission line 103 distributed nationwide through an appropriate cross-connect device 102. As described above, the collection transmission line 103 always transmits program information from all the broadcasting stations 108.
• the cross-connect device 102 is a connection device in which the outgoing line is uniquely determined for incoming lines, and is realized by a hard disk 7 that is simpler than a general exchange. There is a merit power that becomes possible.
• the force s not shown and the collection network 100 may be configured by a hierarchical communication network.
• one of the distribution transmission lines 104 of the distribution network 101 which directly receives the provision of information to each subscriber, is connected to one of the cross-connect devices of the collection network 100. Connected to 102.
• the distribution transmission line 104 is again composed of optical fins.
• the distribution network 101 is also configured by a communication network in a zori state.
• the distribution transmission line 104 is connected in a tree shape using the distributor 104.
• An amplifier 106 for compensating for signal attenuation is connected between the distributors 104 as needed.
• Distributor 105 has multiple distribution nodes 107 Connected. As a result, all the program information transmitted on the collection network 100 is always delivered to the distribution node 107.
• the distribution network can be made a passive network, and the cost of network construction can be reduced. You.
• connection between the collection transmission line 103 and the broadcasting station 108 is made by a cross-connect device 102 having no switching function.
• a switch having a power exchange function may be used in place of some or all of the cross-connect devices.
• FIG. 2 shows the configuration of an embodiment of a broadcast communication system according to the present invention when a ring-shaped or loop-shaped communication network is used for a main part of a collection network and a distribution network.
• FIG. A distribution network 201 is connected to a ring-shaped or loop-shaped main network 200 which also functions as a collection network and a distribution network.
• the network node device 202 is connected in a ring shape or a loop shape by a transmission line 203 composed of an optical fiber which also serves as a collection system and a distribution system. .
• one cross-connect device 102 is connected to one broadcast station 108.
• one network node device 202 is connected to one network node device.
• Many broadcasting stations 208 are connected.
• the configuration of distribution network 201 is the same as distribution network 101 in FIG. It is natural that the loop pack function and the system switching function should be taken into consideration as a measure against failure.
• FIG. 3 is a diagram showing an example of the configuration of a distribution node 207 included in the distribution network of the broadcast communication system shown in FIGS.
• the distribution transmission line 204 is connected to the channel switching device 301 via the channel selection device 303.
• a satellite antenna 312 that receives a radio wave from a broadcasting satellite BSZ communication satellite CS is connected to a channel switching device 301 via a satellite broadcast receiving device 302.
• a public network different from the system of the present invention for example, a B-ISDN network is connected to the channel switching device 301 via the network connection device 304.
• the service controller 308 to which the video signal converter 305, the video knock library 306, and the billing device 309 are connected is also connected to the channel switching device 301.
• the subscriber network 310 is connected to the channel switching device 301 via the subscriber network connection device 307.
• the channel exchange device 301 transmits each program (channel) supplied from the satellite broadcast receiving device 302, the channel selection device 303, and the network connection device 304. It has a switching function that distributes it to subscribers who need it.
• the satellite broadcast receiver 302 is a receiver for broadcast satellites or communication satellites that have already been put into practical use, and these video programs can be exchanged as needed. It can be provided to the subscriber network via the device 301.
• the channel selection device 303 and the network connection device 304 receive programs from the distribution network and the B-ISDN network, respectively. Due to the wired network, the communication network is disconnected due to disasters such as earthquakes, making it difficult or impossible to provide information There is a weak point that it becomes effective. Therefore, the satellite broadcast receiver 302 is also designed to take into account the backup in such a case.
• the channel selection device 303 is connected to the distribution transmission line 204 and the channel required by the subscriber network under the control of the service control device 308. This is a device that selects a distribution network 101 of about 100 channels from all the channels that are transmitting, and delivers it to the channel switching device 301. You.
• the network connection device 304 is an interface device for B-ISDN, and is a device for incorporating the B-ISDN video service, which is currently being studied in various ways. It is.
• the subscriber network connection device 307 is an interface device with the subscriber network 310 for providing information to each subscriber, and the number of subscribers accommodated by each device 307 Need not be particularly limited, but here are approximately 50 subscribers. This reduction in the number of subscribers aims to eliminate the need to insert an amplifier into the subscriber network 310. Also, if the subscriber network connection device 307 is equipped with, for example, about 10 distribution nodes per distribution node, each distribution node can accommodate approximately 500 subscribers. And This is based on the so-called gloss law in computer performance evaluation, downsizing and cost-to-no-former. It is intended to improve the performance.
• the video signal converter 305 loads the digital video signal from the channel selector 303 and the network connection device 304 onto the subscriber network 310 as necessary. This is a device for converting analog video signals that can be converted. Still, video signal converter 305 has a plurality of conversion functions so that different programs can be simultaneously provided to a large number of subscribers. As described above, the channel exchange device 301 has a hybrid exchange function for exchanging and controlling both the digital signal and the analog signal. .
• the Video Package Library 303 is a type of video video software that provides popular video knockout software that subscribers frequently access. It is a disc device. By providing such a storage device in the distribution node, the amount of traffic to the distribution network and the B-ISDN network can be reduced to a small extent.
• the service control device 308 determines the request from the subscriber and issues a command to the channel switching device 301, the channel selection device 303, the network connection device 304, etc. It has the role of delivering the program requested by the subscriber to the relevant subscriber network.
• the charging device 309 is a device for performing charging according to each subscriber's request.
• FIG. 4 is a diagram showing the video package library 300 in detail.
• Consists of The read-only optical disk device 401 has a high frequency of access and records fixed information. Therefore, the write-once optical disk device 402 is a rewritable optical disk device.
• the rewritable optical disk device 403 was obtained via B-ISDN. It can be used to store the information that has been collected.
• Each optical disk device requires a considerable amount of memory. From the point of view, it is appropriate to use a multiple optical disk device that has an auto-changer mechanism and that can access multiple optical disks simultaneously.
• FIG. 5 shows an example of the collection network and the information transfer format of the distribution network up to the distribution node in this broadcasting communication system.
• This format has been adopted by ATM (AsynnchronowsTransfsferMode), which is a B-ISDN transfer technology.
• the data is transferred with the header added.
• the contents of the cell headers are VPI (VirtuaalPaTihIdentifier) and VCI (Virtual).
• Information indicating the destination called "Channel Identifier”, information indicating the type of cell called PT (Payload Type), and information indicating the priority at the time of discarding the cell called P (Pri 0 rity) It is composed of HEC (Header Error Clock) to check for transmission errors in the cell header.
• HEC Header Error Clock
• FIGS. 6A and 6B are diagrams showing the transfer of cells in an ATM.
• Fig. 6A shows a case in which a cell containing information and an empty cell without information are transferred without a gap on the transmission path.
• Figure 6 B is called STM-1 and shows a method of transferring cells by pushing cells into the synchronous format.
• S0H Section Overhead
• S0H is an information area for exchanging maintenance and operation information between opposing devices.
• FIG. 7 shows an example of the subscriber network 310 shown in FIG.
• a coaxial cable or an optical fiber is used to provide a perimeter CATV network 714 and an optical fiber, so-called FTTH (Fiber T o T he Home) Shows net 715.
• the CATV network 714 consists of a distributor 702, a branching device 703, and a customer premises equipment 710.
• the customer premises equipment 710 is a network terminator 711, a video terminal 7. It consists of 1 2.
• the F TTH network 715 comprises a distributor 713 and a subscriber premises device 710.
• the subscriber network is not limited to a tree network, but may be a loop network, a ring network, or a star network.
• Figure 8 shows an example of the usage status of the frequency band in the subscriber network.
• the channel is used as a channel, and 7 OMH.z or more is used as a channel, and the channel is used as a channel.
• the up channel is not required to have a bandwidth of 4 OMHz because it is used for transfer of control information such as a request for a program (channel) to be watched.
• control information such as a request for a program (channel) to be watched.
• the lower channel is a channel that provides a video signal to each subscriber. Therefore, it requires a lot of bandwidth.
• FIG. 9 is a diagram showing an example of how to use a channel.
• the total number of channels provided is 50 channels, and 10 channels as common channels that can be viewed by anyone at any time, according to each subscriber's request.
• An example is shown in which the provided demand channel is composed of the remaining 40 channels.
• the common channel is, for example, a channel that can be viewed within the basic fee, while the demand channel is a so-called pay TV that has a low audience rating. Similarly, a fee may be added.
• Some of the channels are selected from channels that broadcast programs that are broadcast in real time through collection and distribution networks, and video packaging equipment g. Some play the reproduction information of the desired video package.
• a demand channel can be viewed only by subscribers who have requested the channel, and not by subscribers who have not requested the channel. It is necessary to add a function that is controlled so that it does not occur.
• This technology has already been put into practical use. For example, there is a method in which the scramble is applied to the video signal and the descrambling process is performed at the customer premises equipment.
• the bandwidth of the lower channel is limited if not wide, and it must be used effectively. Therefore, in the assignment of the demand channel, the program requested by a certain subscriber is already distributed to the subscriber network via the existing channel. In this situation, if another subscriber requests the same program, the subscriber who requests the same program without assigning a new channel will receive the same program. It is also necessary to make effective use of a limited number of channels by making them accessible via channels.
• channel assignment provision of a program
• provision of a program is allowed for an immediate type channel request or a non-immediate type channel request. It is important to notify subscribers on the human interface.
• a fixed reservation type that guarantees channel reservation at the time of request if a channel can be provided
• a provisional channel reservation There is a provisional reservation type, and in the provisional reservation type, a reservation is taken if there is a shortage of channels when there is a request for a fixed reservation type after that. May be erased.
• the reservation person will be notified that the reservation has been canceled. This may be necessary.
• Figure 10 is a diagram for explaining the optical wavelength multiplexing in the optical fiber in the collection network and distribution network.
• the attenuation of light at wavelengths around 1.3 m and around 1.5 is small.
• the light-emitting diodes of these wavelengths are selected for the laser.
• optical wavelength multiplexing transmission using the difference in wavelength is possible, and using this, low-speed information transmission such as voice and data (bi-directional transmission) can be achieved with a 1.3 m optical signal.
• Multiplex transmission which performs high-speed information transfer (one-way) such as video signals using 1.55 tim optical signals.
• a broadcasting station 108 captures images of lectures at a cram school, and the video signals are collected and collected by a collection network 100. It is transmitted to the distribution nodes 107 all over the country by the distribution network 101.
• the distribution node 107 uses the subscriber network, for example, a demand channel, to reach the video terminal 712 (Fig. 7) at each home, which is used at homes nationwide. You will be able to receive cram school services while you are here. Of course, it is clear that it is also possible to receive at schools established in various places, not at home.
• a variety of educational broadcasts such as university lectures and foreign language lectures can be realized.
• the broadcasting station shown in Fig. 1 corresponds to a broadcasting station nationwide, and the video produced here is to be loaded on a collection network via a cross-connect device. It can be said that it can be received at homes nationwide in the same way as the above application.
• national services such as sports, movies, hobbies, economics, and specialty channels, public relations of governments and local governments, and broadcasts of parliamentary broadcasts or overseas broadcasts in Japan It is clear from the above description that this can be easily realized.
• the example of the current NTSC system has been described as a TV broadcast, in the case of a high-definition television broadcast such as an HDTV (High Definition TV) that is currently being practically used.
• a high-definition television broadcast such as an HDTV (High Definition TV) that is currently being practically used.
• HDTV High Definition TV
• the present invention can be easily implemented only by allocating the transmission capacity per channel approximately five times as large.
• the access frequency is extremely low when multiple distribution nodes are connected.
• the present invention it is possible to receive a super multi-channel broadcast signal all over the country, and to provide a wide area multi-channel which is not provided by conventional TV broadcasting and CATV.
• a broadcast service can be realized Many effects can be expected.

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• Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Multimedia (AREA)
• Computer Networks & Wireless Communication (AREA)
• Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
• Optical Communication System (AREA)
• Small-Scale Networks (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=13273808

Family Applications (1)

Country Status (6)

Citations (2)

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• 1994
  • 1994-03-24 CA CA002136541A patent/CA2136541A1/en not_active Abandoned
  • 1994-03-24 SG SG1996003727A patent/SG52379A1/en unknown
  • 1994-03-24 JP JP52088394A patent/JP3070689B2/ja not_active Expired - Lifetime
  • 1994-03-24 EP EP94910525A patent/EP0645904A1/en not_active Ceased
  • 1994-03-24 WO PCT/JP1994/000466 patent/WO1994022244A1/ja not_active Application Discontinuation
  • 1994-03-24 KR KR1019940704231A patent/KR100220029B1/ko not_active Expired - Fee Related

Patent Citations (2)

Non-Patent Citations (1)

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