JP4257090B2 - Local station apparatus and local station distribution method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention sends digital broadcast program information from a local station such as a CATV station.Local stationEquipment andLocal station delivery methodIn particular, it is possible to distribute program information of a program that a local station independently broadcasts using a low-cost device.
[0002]
[Prior art]
In digital broadcasting, information for the purpose of realizing channel selection, program selection, program guide display, etc. is multiplexed and broadcasted together with program video and audio data. These information include NIT (Network Information Table), PAT (Program Association Table), PMT (Program Map Table), PSI (Program Specific Information) including CAT (Conditional Access Table), and There is SI (Service Information: program arrangement information) including EIT (Event Information Table) and SDT (Service Description Table).
[0003]
The following information is described in these tables.
NIT: Describes information about the network. It includes tuning information for the transport stream (TS) and a service list in which service (synonymous with channel) ID and service type are described.
PAT: Describes the correspondence between a program (synonymous with channel) and a packet ID (PID) of the PMT.
PMT: Describes the type and PID of ES (Elementary Stream) that constitutes a program (synonymous with channel).
CAT: Describes information related to the conditional access system.
EIT: Information related to an event (program ID, program name, program start time, program length, etc.) is described.
SDT: Describes information (service ID, service name, service type, etc.) related to a service (synonymous with channel).
The same contents are repeatedly broadcast on the PSI and SI tables. A version number is assigned to the PSI and SI tables, and the version number increases when the contents change. The receiving device (IRD) receives the latest table by looking at the version number.
[0004]
Also, the receiving device looks at the NIT and obtains a service list in which all services in the network are described. In addition, information such as the name of the service is obtained by looking at the SDT, the broadcast schedule of the program is obtained by looking at the EIT, and an electronic program guide (EPG) is created and displayed from the information on the SDT and EIT.
At this time, the receiving apparatus can know the service from the NIT information, and if there is no NIT information, the electronic program guide cannot be created even if the SDT or EIT information is received.
[0005]
In addition, in the transmission method of program information, in one transport stream (TS), not only information on channels (services) transmitted by the TS but also information on channels transmitted by all other TSs. There is a method called “all-station SI method” for transmitting together, and a method for collectively transmitting information on channels (services) transmitted by all TS using one TS.
In the all-station SI system, since the program table of all stations can be displayed on the receiving apparatus without interrupting the program being viewed, it is convenient for the viewer.
[0006]
By the way, the proportion of digital broadcasts viewed through CATV is increasing.
In CATV stations, digital broadcasts received through satellites or the like are retransmitted by changing only the modulation method to a method suitable for cable television (64QAM). Recently, only broadcasts from such broadcast stations (common broadcasts) are available. In addition, independent broadcast programs independently produced by CATV stations are distributed to subscribers using independent broadcast channels. The independent broadcast channel can be inserted into the TS by re-multiplexing to the desired TS.
Thus, when a CATV station distributes an independent broadcast program, it is necessary to inform the subscriber of the program information of the program, and the program information sent from the broadcast station is not retransmitted as it is, but it is independent. Processing that includes broadcast program information is required.
[0007]
Processing and retransmitting program information received by a CATV station is a program information transmission method in which program information of channels (services) transmitted by all TSs is collectively transmitted using a specific TS. Is easy to handle. Patent Document 1 shown below describes a CATV retransmission apparatus that employs this program information transmission method, reconstructs program information of different information formats received from BS digital broadcasting and CS digital broadcasting, and uses a specific TS. And how to retransmit.
[0008]
However, in the case of the all-station SI system, since the program information included in all TSs must be processed, the processing becomes complicated. FIG. 8 shows a conventional CATV station 30 that distributes self-broadcast program information by the all-station SI system, a program information provider 10 that provides video / audio information and program information of common broadcasts to the CATV station 30, and a CATV station 30. The structure with the receiver 80 which receives broadcast with a cable is shown.
[0009]
The program information providing side 10 includes a common PSI generation unit 11 that generates PSI information such as NIT including a common broadcast service list (common service list), a common SI generation unit 12 that generates common broadcast SI information, TS packet transmission that forms and transmits SI / PSI information generated by encoders (ENC) 14 and 17 that encode broadcast video / audio data, common PSI generation unit 11 and common SI generation unit 12 into TS packets Units 13 and 16, and multiplexing units (MUX) 15 and 18 for multiplexing the SI / PSI information transmitted from the TS packet transmission units 13 and 16 and the encoded video / audio data output from the ENCs 14 and 17, And an RF multiplexer 19 for transmitting the outputs of the MUXs 15 and 18 on radio signals. The ENC (14, 17), the TS packet transmission unit (13, 16), and the MUX (15, 18) are provided corresponding to each of the plurality of TSs.
[0010]
The CATV station 30 includes an antenna 31 that receives a transmission signal from the program information providing side 10, a separator (DIV) 32 that separates the received signal for each TS, IRTs 33, 36, and 39 that extract TS packets, and a program PID replacement units 34, 37, and 40 that delete SI / PSI information sent from the information providing side 10, a PSI generation unit 44 that generates a NIT including a service list of services provided by the CATV station 30, and a CATV station SI generation unit 45 that generates SI information of services provided by 30, and TS packet transmission units 35 and 38 that form and transmit SI / PSI information generated by the PSI generation unit 44 and the SI generation unit 45 into TS packets. , 41, ENC 42 for encoding video / audio data for independent broadcasting, and receiver setting unit 4 for sending contract information for independent broadcasting, etc. MUXs 46 and 47 for multiplexing the outputs of the PID replacement units 34 and 37 and the outputs of the TS packet transmission units 35 and 38, and the outputs of the PID replacement unit 40, the TS packet transmission unit 41, the ENC 42, and the receiver setting unit 43. Multiplexing MUX 48, SCRs 49, 50, 51 for encrypting the outputs of MUXs 46, 47, 48 to prevent unauthorized viewing, modulators 52, 53, 54 for 64QAM modulating the outputs of SCRs 49, 50, 51, modulators And a mixer (MIX) 55 for mixing the outputs of 52, 53, and 54. IRT (33, 36, 39), PID replacement unit (34, 37, 40), TS packet transmission unit (35, 38, 41), MUX (46, 47, 48), SCR (49, 50, 51), The modulators (52, 53, 54) are provided corresponding to each of the plurality of TSs.
[0011]
Further, the receiver 80 separates the tuner 81 for tuning the TS, the TS demodulator 82 for demodulating the TS, the CA Desc 85 for canceling the encryption, the TS packet for AV and the TS packet for SI / PSI information. De MUX 85, setting management unit 84 for managing contract information and viewing control, AV display unit 89 for displaying video and audio, EPG processing unit 86 for performing EPG processing using SI / PSI information, and electronic program guide And an EPG display unit 90 for displaying.
[0012]
When the EPG processing unit 86 receives SI / PSI from the De MUX 85, the NIT included in the PSI is received by the NIT receiving unit 88 and stored in the NIT storage unit 87. Also, an electronic program guide is created using the SI / PSI information and displayed on the EPG display unit 90. When the user selects a channel from the EPG, a tuning instruction is issued to the tuner 81 based on the NIT information, and the PID of the TS packet used for AV display is identified from the SI / PSI information and transmitted to the De MUX 85. The De MUX 85 separates the TS packet of the transmitted PID and sends it to the AV display unit 89, and the AV display unit 89 displays video / audio.
[0013]
Further, the De MUX 85 sends the conditional access control information (CA) and the individual key information (EMM) to the setting management unit 84, and the setting management unit 84 releases the encryption in the CA Desc85 based on the information. Control.
The program information providing side 10 sends SI / PSI information of common broadcasting by the all-station SI system.
[0014]
Note that the Japanese CATV standard stipulates that, when SI / PSI information is transmitted, a fixed PID is attached to a TS packet of such information regardless of the TS. For example, the PID of EIT (program information) is “0x12”, and the PID of SDT (channel information) is “0x42”. By fixing the PID of the SI / PSI information in this way, the receiving side can identify the SI / PSI information only by looking at the PID.
[0015]
On the other hand, the CATV station 30 generates SI / PSI information of a service provided by the CATV station 30 by the PSI generation unit 44 and the SI generation unit 45. The services provided by the CATV station 30 include a common broadcast service and a voluntary broadcast service provided from the program information providing side 10. At this time, a part of the common broadcast service can be excluded from the provided services.
[0016]
The CATV station 30 deletes all the SI / PSI information set by the program information provider 10 included in the received information by the PID replacement units 34, 37, and 40, and instead uses the PSI generation unit 44 and the SI generation unit 45. The generated SI / PSI information is transmitted by the all-station SI method.
With such a configuration, the CATV station 30 can transmit SI / PSI information including program information of independent broadcasting in the all-station SI system.
[0017]
[Patent Document 1]
JP 2001-218182 A
[0018]
[Problems to be solved by the invention]
However, since this CATV station re-creates SI / PSI information on behalf of the program information provider side, it is necessary to have an expensive SI / PSI information generation device similar to the program information provider side. There is a problem that the burden is too heavy for CATV stations.
In this case, if the program information of independent broadcasting can be inserted and retransmitted without discarding the SI / PSI information sent from the program information provider side, the equipment burden on the CATV station will be reduced. Since SI / PSI information is divided into sections and the sections are further divided into TS packets and transmitted, it is technically extremely difficult to find a break in SI / PSI information and insert program information of independent broadcasting. Have difficulty. In addition, if program information of independent broadcasting is inserted at a dark position, the SI / PSI information section is destroyed, and the SI / PSI information cannot be reconstructed on the receiving side.
[0019]
  The present invention solves such a conventional problem, and a local station such as a CATV station can transmit program information of a distribution broadcast including a voluntary broadcast by an all-station SI system without a large facility burden. it canLocal station deviceAlso provide thatLocal station delivery methodThe purpose is to provide.
[0020]
[Means for Solving the Problems]
  The present invention relates to a local station device that distributes a program of a common service acquired from a program information provider side and a program of a self-service, the program of the common service from the program information provider side, the common service and all local A receiving unit that receives program arrangement information (SI) of a station's own service; and the program arrangement information (SI)Event information table (EIT) and service description table (SDT)Packet ID (PID) for own station broadcast attached toRespectivelyA PID replacement unit that replaces the original PID; and a multiplexing unit that multiplexes and distributes the program arrangement information (SI), a common service program broadcast by the local station, and a self-service program. It is characterized by.
  With such a configuration, the local station can distribute the program information of the service of the local station including the independent service by the all-station SI system without involving a large facility burden.
[0023]
  Also, the distribution method of the present invention is a distribution method of a local station that distributes a program of a common service acquired from a program information provider side and a program of a self-service, and a program of a common service from the program information provider side Receiving program arrangement information (SI) of the common service and independent services of all local stations; and the program arrangement information (SI)Event information table (EIT) and service description table (SDT)Packet ID (PID) for own station broadcast attached toRespectivelyA step of replacing the original PID, and a step of multiplexing and distributing the program arrangement information (SI), the program of the common service and the program of the independent service broadcast on the own station. .
[0026]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
In the first embodiment of the present invention, a CATV station generates a NIT including a service list of services provided by itself and replaces the NIT sent from the program information providing side and sends it out. explain.
[0027]
As shown in FIG. 1, the program information providing side 10 constituting this system shares a common broadcast PSI information and a self-broadcast PSI information independently generated by each CATV station 30 with a common PSI generator 20. All SI generation units 21 for creating broadcast SI information and independent broadcast SI information performed by each CATV station 30 are provided, and, in addition, as with the program information providing side 10 in FIG. Encoders (ENC) 14 and 17 that encode the video / audio data of the video data, and TS packet transmission units 13 and 16 that transmit TS packets of SI / PSI information generated by all PSI generation units 20 and all SI generation units 21. A multiplexing unit (MUX) 15 for multiplexing the SI / PSI information sent from the TS packet sending units 13 and 16 and the encoded video / audio data outputted from the ENCs 14 and 17; Includes a 8, a RF multiplexing unit 19 for transmitting the output of each MUX15,18 placed on a radio signal.
[0028]
Also, the CATV station 30 replaces the NIT generating unit 61 that generates a NIT including a service list of services provided by the station, and the NIT sent from the program information providing side 10 with the NIT generated by the NIT generating unit 61. NIT replacement units 62, 63, and 64 are provided. In addition, the antenna 31 that receives the transmission signal from the program information providing side 10 and the reception signal are separated for each TS as in the CATV station of FIG. Separator (DIV) 32, IRTs 33, 36, 39 for extracting TS packets, ENC 42 for encoding independent broadcast video / audio data, and reception of each receiver 80 for sending contract information for independent broadcasts, etc. Machine setting unit 43, NUX replacement unit 64, ENC 42 and MUX 48 that multiplexes the outputs of receiver setting unit 43, and NIT replacement unit 6 to prevent unauthorized viewing. , 63 for encrypting the output of MUX48, SCR51 for encrypting the output of MUX48, modulators 52, 53, 54 for 64QAM modulating the output of SCR49, 50, 51, and modulators 52, 53, 54 And a mixer (MIX) 55 for mixing the outputs of the above. The CATV station 30 transmits the video / audio data for independent broadcasting using the vacant TS received from the program information providing side 10.
The configuration of the receiver 80 is the same as that in FIG.
[0029]
Next, the operation of this system will be described.
The all PSI generating unit 20 of the program information providing side 10 generates PSI information of the common broadcasting service and PSI information of the independent broadcasting service that each CATV station 30 performs independently, and the all SI generating unit 21 The common broadcast service SI information and the independent broadcast service SI information that each CATV station 30 performs independently are created. The TS packet sending units 13 and 16 form SI / PSI information generated by the all PSI generating unit 20 and all SI generating unit 21 into TS packets and send them out. This SI / PSI information is multiplexed with video / audio data of the program encoded by the ENCs 14 and 17 by the multiplexing units (MUX) 15 and 18 and transmitted from the RF multiplexing unit 19.
The signal transmitted from the program information providing side 10 is received by the antenna 31 of the CATV station 30, separated for each TS by the DIV 32, and TS packets are extracted by the IRTs 33, 36, and 39.
[0030]
Further, the NIT generating unit 61 of the CATV station 30 generates an NIT including a list of all services broadcast on the CATV station 30. Services broadcast by the CATV station 30 include a common broadcast service and a self-broadcast service provided from the program information providing side 10. In addition, a part of the common broadcasting service can be excluded.
The NIT replacement units 62, 63, and 64 discard the TS packet including the PIT of the NIT from the TS packets extracted by the IRTs 33, 36, and 39 and capture the NIT generated by the NIT generation unit 61. Data output from the NIT replacement units 62 and 63 is encrypted by the SCRs 49 and 50 and 64QAM modulated by the modulators 52 and 53. Further, the data output from the NIT replacement unit 64 is multiplexed with the video / audio data of the independent broadcast encoded by the ENC 42, the contract information transmitted from the receiver setting unit 43, etc., with the MUX 48, and encrypted with the SCR 51. And 64QAM modulation is performed by the modulator 54. The TS signals modulated by the modulators 52, 53, and 54 are mixed and transmitted to the receiver 80 via a cable.
[0031]
The receiver 80 takes in TS packets of the TS tuned by the tuner 81, demodulates them by the TS demodulator 82, and decrypts them by the CA Desc 85 with the permission of the setting manager 84. The De MUX 85 sends the SI / PSI information to the EPG processing unit 86, and when the EPG processing unit 86 receives the SI / PSI from the De MUX 85, the NIT is stored in the NIT storage unit 87. This NIT is generated by the NIT generating unit 61 of the CATV station 30. In addition, the EPG processing unit 86 generates and displays an EPG using the SI / PSI information.
[0032]
At this time, the SI information includes SI information of the common broadcast service generated by all the SI generation units 21 of the program information providing side 10 and SI information of the independent broadcast service of each CATV station 30. Since the NIT stored in the NIT storage unit 87 includes only the service list of services broadcast by the CATV station 30, an electronic program guide for only the services provided from the CATV station 30 on the service list is included. Is displayed.
[0033]
When the user selects a program from the electronic program guide, the EPG processing unit 86 acquires frequency information from the stored NIT, instructs tuning of the tuner 81, and determines the PID of AV data from the SI / PSI information. Is transmitted to De MUX85. The De MUX 85 separates the TS packet of the PID and sends it to the AV display unit 89, and the AV display unit 89 displays video / audio.
[0034]
As described above, in this program information transmission system, the generation of SI information is left to the program information providing side, and the CATV station generates only the NIT including the list of services broadcast by the CATV station. The NIT information amount is about 1/1000 of the SI information amount, which is extremely small. Also, the information content of the NIT hardly changes. Therefore, even if the NIT generating unit that generates the NIT is provided in the CATV station, the burden on the CATV station is extremely small.
[0035]
Here, the case where all the PSI generation units 20 on the program information providing side 10 generate PSI for all services including the independent broadcast service has been shown. However, in this PSI generation unit, only the PSI for the common broadcast is generated. You may make it do. In this case, the CATV station that provides only the common broadcast service without performing the independent broadcast service may simply transmit the SI / PSI information received from the program information providing side 10 as it is.
[0036]
(Second Embodiment)
In the second embodiment, a case will be described in which a CATV station operates an independent broadcasting service with its own TS. In the all-station SI system, SI / PSI information of all services provided by the CATV station must be included in the TS that is independently operated by the CATV station. Even if the generation of SI / PSI information included in this uniquely operated TS is left to the program information providing side as in the first embodiment, the program information providing side 10 not operating the TS can The question is whether to send SI / PSI information to the CATV station.
In this system, the program information provider 10 transmits SI / PSI information with a PID that is not the original PID, and the CATV station that receives the SI / PSI information replaces the PID with the original PID and operates independently by the TS. To include.
[0037]
In this program information sending system, as shown in FIG. 2, the TS packet sending unit 16 on the program information providing side 10 includes a self TS processing unit 22 for attaching a special PID to SI / PSI information for the self broadcasting TS. Yes. In addition, the CATV station 30 includes PID replacement units 65 and 66 that attach an original PID to SI / PSI information to which a special PID is added or delete unnecessary SI / PSI information. Other configurations are the same as those of the first embodiment (FIG. 1).
[0038]
Next, the operation of this system will be described.
The all PSI generating unit 20 of the program information providing side 10 creates PSI of all services including the independent broadcasting service of each CATV station 30, and the all SI generating unit 21 sets the independent broadcasting service of each CATV station 30. Create SI information for all the services it contains. The TS packet sending units 13 and 16 send out TS packets of SI / PSI information generated by the all PSI generating unit 20 and the all SI generating unit 21. Further, the independent TS processing unit 22 of the TS packet transmission unit 16 generates a TS packet of SI / PSI information for TS that is independently operated by the CATV station 30, and transmits the TS packet with a special PID. The SI / PSI information transmitted from the TS packet transmission units 13 and 16 is multiplexed with the encoded video / audio data of the program and transmitted.
[0039]
The signal transmitted from the program information providing side 10 is received by the CATV station 30, separated for each TS by the DIV 32, and TS packets are extracted by the IRTs 33, 36 and 39. The PID replacement unit 65 deletes SI / PSI information with a special PID. Therefore, only the SI / PSI information with the original PID is left. On the other hand, the PID replacement unit 66 deletes the SI / PSI information with the regular PID, and replaces the PID of the SI / PSI information with the special PID with the original PID.
[0040]
Subsequent operations are the same as those in the first embodiment. The SI / PSI information in which the PID is replaced by the PID replacement unit 66 is multiplexed by the MUX 48 with the video / audio of the independent broadcast, the contract information transmitted from the receiver setting unit 43, etc. after the NIT replacement. The data is encrypted by the SCR 51, 64QAM modulated by the modulator 54, and transmitted by the TS that is independently operated by the CATV station 30.
[0041]
FIG. 7 schematically shows SI / PSI information of each TS received by the CATV station 30 and SI / PSI information of each TS transmitted from the CATV station 30 in this system. The CATV station 30 operates TS5 independently. The SI / PSI information included in TS5 is sent by TS4 with a separate PID. The CATV station 30 deletes the SI / PSI information to which another PID is added from the TS4, and leaves only the original SI / PSI information in the TS4. Also, the SI / PSI information with the regular PID is deleted from the received TS4, and the PID of the SI / PSI information with another PID is replaced with the original PID to obtain the SI / PSI information of TS5.
Thus, in this program information transmission system, even when the CATV station operates the independent broadcasting service with its own TS, it is possible to transmit the program information by the all-station SI system.
[0042]
(Third embodiment)
In the third embodiment of the present invention, a program information transmission system in which an NIT including a service list of CATV stations is generated on the program information provider side will be described.
In this system, as shown in FIG. 3, on the program information providing side 10, the common PSI generating unit 23 that generates the PSI of the common broadcast service is the NIT for each CATV station (that is, the service provided from each CATV station). NIT generation unit 24 for each CATV that generates a list of NITs), and TS packet transmission units 13 and 16 transmit each NIT for each CATV station with a separate PID attached thereto. Separate PID sending units 25 and 26 are provided.
[0043]
Also, the CATV station 30 deletes the NIT with the regular PID attached instead of the NIT generation unit and the NIT replacement unit, and replaces the PIT of the NIT with the PID for the CATV station 30 with the regular PID. PID replacement units 67, 68, and 69 are provided. Other configurations are the same as those of the first embodiment (FIG. 1).
[0044]
Next, the operation of this system will be described.
Each CATV-specific NIT generating unit 24 of the common PSI generating unit 23 on the program information providing side 10 grasps services provided by each CATV station and generates a NIT including a list of services of each CATV station.
Further, the all SI generation unit 21 creates SI information of all services including the independent broadcasting service of each CATV station 30.
The PID sending units 25 and 26 for each NIT of the TS packet sending units 13 and 16 attach the PID for each CATV station to the NIT of each CATV station generated by the NIT generating unit 24 for each CATV and send it.
[0045]
On the other hand, when the PID replacement units 67, 68, and 69 of the CATV station 30 receive the NIT with the regular PID, they are deleted and the NIT with the PID for the CATV station 30 is received. If so, the PID is replaced with a regular PID.
By performing such processing, the receiver 80 that has received the data transmitted from the CATV station 30 identifies only the NIT for the CATV station 30 to which the regular PID is attached as the NIT. Therefore, the receiver 80 performs the same process as in the first embodiment.
Thus, in this program information transmission system, it is not necessary to provide a NIT generating unit in the CATV station, and the configuration of the CATV station can be simplified.
[0046]
(Fourth embodiment)
In the fourth embodiment of the present invention, a program information transmission system in which a CATV station transmits an NIT including a service list of the station by a specific TS, and a receiver receives the NIT from the TS will be described.
In this program information transmission system, as shown in FIG. 4, the CATV station 30 generates a NIT including a list of services provided from the station, and transmits the NIT with a special PID different from the regular PID. The specific NIT generation unit 70 is provided, and the EPG processing unit 86 of the receiver 80 includes a specific NIT reception unit 91 that receives the NIT.
[0047]
Next, the operation of this system will be described.
The common PSI generating unit 23 on the program information providing side 10 generates PSI information for common broadcasting, and the all SI generating unit 21 generates SI information for all services including the independent broadcasting service of each CATV station 30. The program information providing side 10 sends out such information in all TSs.
[0048]
In the CATV station 30, the specific NIT generating unit 70 generates an NIT including a list of services provided from the station, and transmits the NIT with a special PID different from the regular PID. The output of the specific NIT generation unit 70 includes information received from the program information providing side 10, independent broadcast video / audio data encoded by the ENC 42, contract information transmitted from the receiver setting unit 43, and the like in the MUX 48. Multiplexed and transmitted to the receiver 80 by a specific TS. In other TSs, the information received from the program information providing side 10 is transmitted as it is.
[0049]
The receiver 80 first receives this specific TS. The specific NIT receiving unit 91 of the EPG processing unit 86 receives the NIT with the special PID and stores it in the NIT storage unit 87.
Thus, by storing the NIT including the service list of the CATV station in the NIT storage unit 87, even if each TS includes the SI of all services including the independent broadcast service of each CATV station, the electronic program guide Will display a program guide only for services provided by the CATV station 30.
[0050]
Thus, in this program information transmission system, the program information provider generates SI of all services and sends it from each TS, and the CATV station generates NIT including its own service list and sends it from a specific TS, The receiver obtains the NIT including the service list of the CATV station from the specific TS. With such a configuration, the program information can be transmitted by the all-station SI system.
[0051]
(Fifth embodiment)
In the fifth embodiment of the present invention, a program information transmission system in which the receiver generates the NIT of the CATV station from the received information will be described.
In this program information transmission system, as shown in FIG. 5, the CATV station 30 includes a difference NIT generation unit 71 that generates a difference (difference NIT) between the NIT including the service list of the CATV station and the NIT of the common broadcast. In addition, the EPG processing unit 86 of the receiver 80 receives a differential NIT reception unit 92 that receives a differential NIT from a specific TS, a NIT reception unit 93 that receives a common broadcast NIT, and a differential NIT and a common broadcast NIT. And a NIT synthesis unit 94 for synthesizing the NIT of the CATV station.
Other configurations are the same as those of the fourth embodiment (FIG. 4).
[0052]
Next, the operation of this system will be described.
The common PSI generating unit 23 on the program information providing side 10 generates PSI information for common broadcasting, and the all SI generating unit 21 generates SI information for all services including the independent broadcasting service of each CATV station 30. The program information providing side 10 sends out such information in all TSs.
[0053]
In the CATV station 30, the difference NIT generating unit 71 generates the difference NIT. This difference NIT is multiplexed by the MUX 48 with information received from the program information providing side 10, self-broadcast video / audio data encoded by the ENC 42, contract information transmitted from the receiver setting unit 43, and the like. It is transmitted to the receiver 80 by TS. In other TSs, the information received from the program information providing side 10 is transmitted as it is.
In the receiver 80, the differential NIT reception unit 92 of the EPG processing unit 86 acquires the differential NIT from a specific TS. Further, the NIT receiving unit 93 scans each TS and acquires the NIT included in the PSI information of the common broadcast. The NIT combining unit 94 combines the NIT acquired by the NIT receiving unit 93 and the differential NIT acquired by the differential NIT receiving unit 92, combines the NIT of the service provided by the CATV station 30, and stores the combined NIT in the NIT storage unit 87. To do.
Subsequent operations are the same as those in the fourth embodiment.
[0054]
In this program information transmission system, even when there is a change in NIT such as BS broadcast or CS broadcast, the CATV station 30 does not need to reflect the NIT (difference NIT) created by itself. This facilitates the operation of the CATV station.
The receiver 80 has to scan each TS, but even if it is not necessary to collect NIT information, other information such as EIT must be collected every day, so that the burden is not increased.
[0055]
(Sixth embodiment)
In the sixth embodiment of the present invention, a program information transmission system in which a receiver extracts NIT information from receiver setting information and generates a NIT of a CATV station will be described.
In this system, as shown in FIG. 6, the CATV station 30 includes a NIT adding unit 72 that adds NIT information to receiver setting information such as contract information for independent broadcasting, and setting management of the receiver 80. The unit 84 includes a NIT extraction unit 95 that extracts NIT information from the receiver setting information, and the EPG processing unit 86 processes the NIT of the CATV station 30 from the extracted NIT information and the common broadcast NIT. A portion 96 is provided.
[0056]
Next, the operation of this system will be described.
The receiver setting unit 43 of the CATV station 30 sets receiver setting information such as contract information for independent broadcasting for each receiver, and the NIT adding unit 72 adds the NIT of independent broadcasting to this receiver setting information. To do.
On the other hand, in the receiver 80, the NIT extraction unit 95 of the setting management unit 84 extracts NIT information from the receiver setting information. The NIT processing unit 96 of the EPG processing unit 86 processes the extracted NIT information and the NIT information of the common broadcast acquired by scanning each TS to generate the NIT of the CATV station 30, and stores it in the NIT storage unit 87. Store.
Subsequent operations are the same as those in the fourth embodiment.
[0057]
Thus, in this program information transmission system, the NIT information of the CATV station can be configured on the receiver side.
In addition, since it corresponds to the form where the broadcasting system that adopts the all-station SI system and the broadcasting system that does not adopt it are mixed, the correspondence table between the network_id and the frequency that specifies the broadcasting system of all broadcasting to be transmitted from the program information providing side. The receiver acquires a correspondence table from the specific TS, and in the case of a broadcasting system (BS broadcasting / CS broadcasting / D-CATV Remux) that adopts the all-station SI method, only one TS is transmitted. For other broadcasting systems (terrestrial digital), each TS may be viewed.
[0058]
【The invention's effect】
  As is apparent from the above description, the present inventionBy, Local stationThenEven without introducing expensive equipment, program information of local station services including self-service can be distributed using the all-station SI system..
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a program information transmission system according to a first embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a program information transmission system according to a second embodiment of the present invention.
FIG. 3 is a block diagram showing a configuration of a program information transmission system according to a third embodiment of the present invention.
FIG. 4 is a block diagram showing a configuration of a program information transmission system according to a fourth embodiment of the present invention.
FIG. 5 is a block diagram showing a configuration of a program information transmission system according to a fifth embodiment of the present invention.
FIG. 6 is a block diagram showing a configuration of a program information transmission system according to a sixth embodiment of the present invention.
FIG. 7 is a diagram showing SI / PSI information in each TS according to the second embodiment of the present invention.
FIG. 8 is a block diagram showing the configuration of a conventional program information transmission system
[Explanation of symbols]
10 Program information provider
11 Common PSI generator
12 Common SI generator
13, 16 TS packet sending part
14, 17 ENC
15, 18 MUX
19 RF multiplexer
20 All PSI generators
21 All SI generator
22 Independent TS processing section
24 NIT generator for each CATV
25, 26 PID sending part for each NIT
30 CATV stations
31 Antenna
32 DIV
33, 36, 39 IRT
34, 37, 40 PID replacement part
35, 38, 41 TS packet transmitter
42 ENC
43 Receiver setting section
44 PSI generator
45 SI generator
46, 47 MUX
49, 50, 51 SCR
52, 53, 54 Modulator
55 MIX
61 NIT generator
62, 63, 64 NIT replacement
65, 66 PID replacement part
67, 68, 69 PID replacement part
70 Specific NIT generator
71 Difference NIT generator
72 NIT grant department
80 receiver
81 tuner
82 TS demodulator
83 CA Desc
84 Settings Management Department
85 De MUX
86 EPG processing part
87 NIT storage
88 NIT receiver
89 AV display
90 EPG display
91 Specific NIT receiver
92 Differential NIT receiver
93 NIT receiver
94 NIT synthesis unit
95 NIT extractor
96 NIT processing department

Claims (2)

A local station device that distributes a program of a common service acquired from a program information provider and a program of a self-service,
A receiving unit for receiving a program of a common service from the program information providing side, and program arrangement information (SI) of the common service and independent services of all local stations;
A PID replacement unit for replacing the packet ID (PID) for own station broadcast attached to the event information table (EIT) and the service description table (SDT) of the program arrangement information (SI) , respectively, with the original PID;
A multiplexing unit that multiplexes and distributes the program arrangement information (SI), the program of the common service and the program of the independent service broadcast on the own station;
A local station device comprising: A local station distribution method for distributing a program of a common service acquired from a program information provider and a program of a self-service,
Receiving a program of a common service from the program information providing side and program arrangement information (SI) of the common service and independent services of all local stations;
And replacing event information table (EIT) and a service description table packet ID for the mobile station broadcasting attached to (SDT) of the service information (SI) to (PID) to the original PID, respectively,
Multiplexing and distributing the program arrangement information (SI), a program of a common service and a program of an independent service broadcasted by the own station;
A local station distribution method characterized by comprising:

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