JPH11136669A - Device and method for satellite broadcasting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To broadcast individual information synchronized with a center station from each station to a broadcast receiver by providing a broadcasting channel of exclusive use for the center station at a satellite repeater for a communication broadcasting satellite and permitting the broadcasting wave of this center station to be intercepted at a transmission station to constitute other satellite ground-based stations. SOLUTION: When a center station 4 uses a first channel CH1 of a transponder 3 and broadcasts a broadcasting wave SB1, use permission information of a second and a third channels CH2 and CH3 shared with transmission stations 5A to 5D are broadcast to a transport packet of a transport stream K1. At the same time, individual information EM for indicating contract contents of all the broadcasting receives who have entered into reception contracts. The transmission stations 5A to 5D transmit this individual information to the broadcasting receivers who have entered into reception contacts by adding the individual information to program information of its own station and transmitting it to the transponder 3 as satellite waves S2A or S3A to S2D or S3D with a simple structure only to intercept the broadcasting wave SB1 of the center station 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Table of Contents] The present invention will be described in the following order.

BACKGROUND OF THE INVENTION Problems to be Solved by the Invention Means for Solving the Problems Embodiments of the Invention (FIGS. 1 to 9) Effects of the Invention

[0003]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite broadcasting apparatus and method, and particularly to a satellite broadcasting apparatus and a digital satellite broadcasting apparatus using the satellite broadcasting system (that is, a digital satellite broadcasting system).

[0004]

2. Description of the Related Art Conventionally, as a method for enabling only a receiving device of a customer who has made a reception contract to receive a satellite broadcast program, individual information EMM indicating the contents of a reception contract for each customer has been proposed.
(Entitlement Management Message) is distributed in advance to customers who have subscribed to the reception contract, and when a broadcast program (ie, a broadcast program) is broadcast from a communication broadcasting satellite, information accompanying the program is sent to the program receiver in common. Common information E
A method is used in which a customer's receiving apparatus having individual information EMM distributed in advance can determine whether or not the broadcasted program can be received by broadcasting a CM (Entitlement Control Message). I have.

[0005]

By the way, a satellite wave is transmitted from a plurality of transmitting stations constituting a satellite ground station to a communication broadcasting satellite, and an occupied frequency band of a satellite transponder (transponder) mounted on the communication broadcasting satellite. If you intend to broadcast as a broadcast wave to a general broadcast receiver's receiving device via a plurality of broadcasting channels provided in the In order to add the individual information EMM to the customer, the repeater provided in the center station is used to send the data representing the individual information EMM about all the subscribers to the terrestrial network to all the transmitting stations. (Eg LAN)
A system is adopted in which the information is sequentially distributed via a transmission station, temporarily stored in a repeater provided in each transmission station, and the stored information is read out cyclically by each transmission station and added to the program information.

However, when such a system is used, when a plurality of transmitting stations are scattered in a wide area, there is a problem that a terrestrial network becomes large-scale.
Further, when the number of transmitting stations is large, there is a problem that the data transmission time of the individual information EMM to each transmitting station becomes long (particularly, when data is updated, the transmission time is required each time).

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a simple configuration and a satellite broadcasting apparatus capable of transmitting individual information EMM to a transmitting station at timing substantially synchronized. It is intended to propose a method.

[0008]

According to the present invention, in order to solve the above-mentioned problems, first individual information relating to a receiving device of a general broadcast receiver is provided via a dedicated channel dedicated to a center station provided in a satellite repeater. Is added to the program broadcast to be broadcasted and broadcast from the center station, the broadcast wave of the center station is intercepted by the satellite ground station, and the first individual information included in the broadcast wave of the center station is transmitted. Separate, the first individual information is added as second individual information to the program information of the own station, and broadcast from each satellite ground station via a broadcast channel other than the dedicated channel of the satellite repeater.

Thus, the receiving device of the general broadcast receiver receives the broadcast wave of the center station via the dedicated channel of the satellite transponder, and utilizes the first individual information to make use of the first individual information. And the second individual information obtained by receiving the broadcast wave of each satellite ground station broadcast from a broadcast channel other than the dedicated channel of the satellite repeater. Only received programs can be received.

In this connection, there is no need to provide a special terrestrial network for transmitting individual information relating to the receivers of all general broadcast receivers from the center station to each satellite ground station. Since the scale of the broadcasting system can be reduced, the first individual information of the center station is added to the program information of the own station as the second individual information. At such timings, the individual information can be transmitted from each satellite ground station to a receiving device of a general broadcast receiver.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a broadcasting system as a whole. A transponder (satellite repeater) 3 having an occupied frequency of, for example, 27 [MHz] is mounted on a communication broadcasting satellite 2.

In the case of this embodiment, the transponder 3
Occupied frequency band F _BAND is frequency-divided into first, second, and third channels 1CH, 2CH, and 3CH, and thus the first, second, and third channels 1CH, 2CH
And 3CH, the transponder 3 can relay the satellite wave transmitted from the center station 4 which is a satellite ground station and broadcast it to the transmission stations 5A to 5D which are satellite ground stations. 27 [MHz]
The transmission frequencies allocated to the first, second and third channels 1CH, 2CH and 3CH within the occupied frequency band of the single channel transmission system SCPC (Si
Ngle Channel Per Carrier) can broadcast three channels of broadcast waves.

Here, the single channel transmission system is defined as
This is a transmission system in which the occupied frequency band of the transponder is divided into broadcast channels of a plurality of transmission frequencies and one satellite ground station is assigned to each broadcast channel.

In the case of this embodiment, the first channel 1
The CH is provided as a dedicated broadcast channel to the center station 4 and the second and third channels 2C
H and 3CH have four transmitting stations 5A, 5B, 5C and 5
D is provided as a shared broadcast channel.

The center station 4 includes program information indicating programs to be broadcast from the center station 4 to the receiving apparatuses 6A, 6B,... Of general broadcast receivers, and a second information shared by the transmitting stations 5A to 5D.
Represents broadcast channel use permission information for giving permission to use the channel 2CH or the third channel 3CH to the transmitting stations 5A, 5B, 5C and 5D, and contract information for all general broadcast receivers who have received a subscription contract. A satellite wave S1 including the individual information EMM is transmitted to the communication broadcasting satellite 2.

The satellite wave S1 transmitted from the center station 4
Are relayed via the dedicated first channel 1CH of the transponder 3 and broadcast as broadcast waves SB1 to the receivers 6A, 6B,... Of general broadcast receivers, and thus the receivers 6A, 6B,. Recipient is transponder 3
By selecting the first channel 1CH, the program information of the center station 4 can be received together with the individual information EMM.

In addition, the transmitting stations 5A to 5D communicate with the first channel 1CH of the transponder 3 of the communication broadcasting satellite 2.
Broadcast wave SB1 at all times and broadcast channel use permission information and individual information EMM included in broadcast wave SB1.
Of the second and third channels 2CH and 3CH of the transponder 3, the data of the broadcast channel permitted to be used by the center station 4 and the data of the permitted time and reception of all general broadcast receivers who have subscribed to the reception. The data of the individual information EMM about the device can be taken in.

When the broadcast channel use permission information and the individual information EMM are received, the transmitting stations 5A, 5B, 5C and 5
D is program information to be broadcast to the receiving devices 6A, 6B,... Of general broadcast receivers at the transmission frequency of the second or third channel 2CH or 3CH during the permitted time.
Satellite waves S2A or S3A, S2B or S3B, S representing individual information EMM about all general broadcast receivers
2C or S3C or S2D or S3D is transmitted to the communication broadcasting satellite 2.

Thus, the transponder 3 transmits the satellite waves S2A, S2B, S2 of the transmission frequency of the second channel 2CH.
When one of 2C or S2D is transmitted, it is relayed to receive devices 6A and 6B of general broadcast recipients.
The satellite waves S3A, S3 having the transmission frequency of the third channel 3CH are broadcast at the same time as the broadcast wave SB2.
When one of B, S3C or S3D is transmitted, this is transmitted to the receiving devices 6A, 6B,.
... are broadcast as a broadcast wave SB3.

As a result, the receiving device 6 of a general broadcast receiver
A, 6B,... Receive the program information together with the individual information EMM from the center station 4 via the first channel 1CH only by selecting the first channel 1CH, the second channel 2CH or the third channel 3CH. The program information of the transmitting stations 5A to 5D broadcast through the second channel 2CH or the third channel 3CH can be transmitted to the individual information EM.
M and can be received.

In this case, the program information of the transmitting stations 5A to 5D is substantially obtained by the combination of the time and the channel designated by the center station 4 by the broadcast channel use permission information.
The program information of the transmitting stations 5A to 5D is combined as a broadcast wave similar to that edited in the communication broadcasting satellite 2, resulting in a broadcast from the transponder 3, and thus a general use of the receiving devices 6A, 6B,. Broadcast recipients
Substantially, the center station 4 transmits the program material information of the transmitting stations 5A to 5D.
After being collected and edited, the user can view the program edited in the same manner as broadcasted from the communication broadcasting satellite 2.

In the case of the broadcasting system 1 shown in FIG.
S1A transmitted from the transmission station 5A-5D and satellite waves S2A or S3A-S2D or S3D transmitted from the transmission stations 5A-5D
Is MPEG2 (Moving Picture Exparts Gloop Phase
2) Transport defined by the system
As a stream, first, a program is transmitted as program information, and second, the broadcast channel use permission information of the second channel 2CH or the third channel 3CH from the center station 4 to the transmission stations 5A to 5D is transmitted to the satellite wave S1. M that constitutes
Program specification information P included in the PEG2 system
Network information table NIT (Network) of four tables of SI (Program Specific Information)
Thirdly, individual information EMM about all broadcast receivers subscribed to the reception is transmitted.

The format of the MPEG2 system is as follows so that a large number of individual coded streams can be time-division multiplexed in a transport packet of a relatively short transmission unit so that multi-channel program information can be transmitted. Stipulated.

As shown in FIG. 2, the transport stream K1 has a configuration in which 188-byte transport packets K11 are sequentially connected.
The packet K11 has a packet identification code PID (Packet I
dentification), and a content part data part K11B.

The content data section K11B is a unit packet stream PES (Packetized Ellipse) formed by packetizing program information (ie, program information) such as video and audio.
ementary Stream) format data stream K2 and a description (Section) format section data stream K3 in which data representing various types of management information are written one after another are transport packets K1.
For example, a data stream is formed by being divided into lengths of 1 and inserted alternately, for example, and a network information table NIT including broadcast channel use permission information is provided at a predetermined timing with respect to the data stream. Has been inserted.

The header K11A of the transport packet K11 contains the content identification information of the packet data. The content identification information indicates whether the content of the packet is the data of the program data stream K2. Alternatively, it is possible to identify whether the data is the data of the section data stream K3 or the data of the network information table NIT, so that the necessary packets can be separated and taken out on the receiving side to decode each data. ing.

The program specification information PSI includes information such as "which program is to be selected from a plurality of programs", "which packet should be taken out and how to decode".
Four tables, a program association table PAT (Program Asossiation Table),
Program MapTab
le), Conditional Access Table CAT
(Conditional AccessTable) and Network Information Table NIT (Network Informatio)
n Table).

The program association table PAT contains, for each program number, a packet identifier PI indicating a packet of the program map table PMT for transmitting information of a packet constituting the program.
D is shown.

The program map table is:
For each program number, a packet identifier PID of a packet that transmits a data stream such as video, audio, and additional data constituting the program is shown.

Further, the conditional access table CAT indicates a packet identifier PID of a packet for transmitting descrambling information for descrambling in pay broadcasting.

Further, the network information table NIT stores physical information on the transmission path,
That is, the information includes information such as the orbit and polarization of the satellite, the frequency of each transponder (that is, the satellite transponder), and the information for identifying the channel multiplexed on each transponder.

In the broadcasting system 1 shown in FIG. 1, among the four tables, the network information table NIT is used to transmit the broadcasting channel use permission information from the center station 4 to the transmitting stations 5A to 5D. I do.

The network information table NIT has a data structure as shown in FIG.

The table ID (table identifier) D1 is
Shows the type of table specified by MPEG2.

Network ID (network identifier)
D2 identifies a stream of multiplexed encoded data, and is used to identify a transponder (satellite repeater) 3 of the communication broadcasting satellite 2.

The version number D3 is added each time the contents of the table are updated, and the current / next / instruction data D4 is used for identification when transmitting new and old versions simultaneously.

In addition to this, in the network information table NIT, a description of the length determined by the transport descriptor length data D5 follows the transport stream TS descriptor length data D5. As the child D6, a satellite delivery system descriptor D10 shown in FIG. 4 and a service list descriptor D20 shown in FIG. 5 are sequentially described.

Satellite Delivery System Descriptor D
Numeral 10 indicates the specifications of the communication broadcasting satellite 2 and its transponder 3 used for transmitting information. The frequency data D11 indicates the transmission frequency of the transponder 3, the orbit data D12, the west longitude flag data D13, and the polarization The data D14 indicates the orbit and the polarization of the communication broadcast satellite 2,
The modulation data D15, the symbol rate data D16, and the FEC (inner) data D17 indicate specifications regarding the transmission system. FEC indicates Forward Error Correction.

On the other hand, the service list descriptor D
Reference numeral 20 denotes identification information of a service multiplexed on the transponder 3, that is, a channel. Descriptor tag data D21 indicates a type of a descriptor.
Reference numeral 22 denotes a broadcast channel (that is, the second channel 2CH and the third channel 3C) among the transmission stations 5A to 5D.
H) indicates the identification information of the transmitting station whose use is to be permitted and the identification information of the channel whose use is to be permitted, and the service type data D23 indicates the contents of the service such as video, audio and data.

As described above, the satellite wave S1 transmitted from the center station 4 to the transponder 3 transmits the program information of the program produced by the own station as a packet stream based on the specifications of the MPEG2 system, and also transmits the packet stream. As descriptor data D6 of the network information table NIT of the program specification information PSI included in the header section of the transmitting stations 5A and 5A,
The broadcast channel designated data for B, 5C and 5D is transmitted in a time-division manner.

This means that, in effect, the center station 4
At the same time that program information is transmitted by the single channel transmission method SCPC using the transmission frequency of the channel,
This means that broadcast channel use permission information is transmitted to the transmitting stations 5A to 5D.

Each packet K21 of the program data stream K2 (FIG. 2) includes a header portion K21A, which is data for identifying the content of the packet, and a content portion K21B representing the content of the packet, and the content portion K21B is a video. -It is composed of data such as voice.

Each section packet K31 of the section data stream K3 (FIG. 2) is composed of a header section K31A, which is data for identifying the description, and a section K31B, which represents the description. Station information, conditional access information, and program guide information EPG (Elec
tric Program Guide), and as conditional access information,
Common information ECM (Entitlement) such as channel information
Control Message) and individual information EMM are described.

In the case of this broadcast system 1, the individual information EMM for each broadcast recipient is processed according to the procedure shown in FIG.

When a customer who has a program for which he / she wants to make a subscription contracts with the customer management center 7, the customer receives a program contract I
A D number (IC card number) is assigned, and is input as a program contract ID number data D21 to an individual information EMM raw data creating unit 7B and an ID number / master key Km table unit 7C via a program contract ID number input unit 7A. Is done.

At this time, the individual information EMM raw data creation unit 7B includes the program contract conditions and the work period K, and the work key Kw data as the program contract conditions from the program contract condition / work key input unit 7D. Is input, and the individual information EMM elementary data D23 thus created in the individual information EMM elementary data creation section 7B is supplied to the encryption section 7E.

Here, as the tier, for example, a flat contract that is charged on a monthly basis or a paper-view system that is charged only for viewing is specified.

ID number / master key Km table section 7C
Reads the master key data D _km corresponding to the program contract ID number data D21 and gives it to the encrypting unit 7E as a scramble condition, whereby the individual information EMM raw data D
Individual information EMM data D _EMM obtained by encrypting 23 with the master key data D _km is supplied to the center station 4 as output data of the customer management center 7.

The center station 4 receives the supplied individual information EMM.
Based on the data D _EMM , the section data
A stream K3 is created, a transport stream K1 is synthesized with the program data stream K2, and the combined stream is transmitted as a satellite wave S1 to the communication broadcasting satellite 2, and as a result, is broadcast as a broadcasting wave SB1.

At this time, the transmitting stations 5A to 5D transmit the broadcast waves SB1 of the first channel assigned to the center station 4.
, The section data stream K3 is reproduced, and then the transport stream K1 is reproduced using the program data stream K2 created by the own station.
Are recombined, and the satellite waves S2A, S3A to S2D, S3
D is transmitted to the communication broadcasting satellite 2.

Thus, the transmitting stations 5A to 5D are connected to the center station 4
Is transmitted in combination with the data of the own station as it is.

As a result, the first channel 1CH, the second channel 2CH and the third channel 3 of the communication broadcasting satellite 2
The section data stream K3 created in the center station 4 via the CH is transmitted to the center station 4, the transmission station 5
A to 5D, together with a program data stream K2 based on a program produced in each of the broadcast waves SB
1, SB2 and SB3.

The master key data D _km read from the ID number / master key Km table section 7C at the customer management center 7 is provided to the security module issuing section 7F together with the ID number data D21, and is provided, for example, as an IC card security section. Written on the module 7G,
Distributed to contract customers.

[0055] When the security module 7G distributed to the customer who has made the reception contract as described above is attached to the receivers 6A, 6B,. Broadcast waves SB1, S
When B2 and SB3 are received by the receiver with built-in decoder 6X, the individual information EMM of the broadcast waves SB1, SB2 and SB3 is used to identify the individual ID number that matches with the ID number data written in the security module 7G. The work key Kw is extracted by extracting the information with the master key Km written in the security module 7G, and the scramble key data D representing the scramble key Ks is obtained based on the work key Kw.
_Ks and the viewing information D _RC indicating the viewing range are supplied to the receiver 6X with a built-in decoder.

The receiver with built-in decoder 6X decodes the program information corresponding to the viewing information _DRC among the programs broadcasted by the received broadcast waves SB1, SB2 and SB3 using the scramble key data D _Ks. You can watch.

Thus, the general broadcast receiver who has subscribed to the reception contracts the security broadcast received from the customer management center 7.
Using the module 7G, broadcast waves SB1, SB2 and S
Of the programs broadcast by B3, only the programs that match the program contract conditions written in the security module 7G can be decoded and viewed.

The program reception contract procedure as shown in FIG.
The center station 4 is configured as shown in FIG.
5A to 15D are configured as shown in FIG. 8, and the receivers 6A, 6B... Of the broadcast receiver are configured as shown in FIG.

In FIG. 7, the center station 4 receives the individual information EMM data D _EMM supplied from the customer management center 7 in the multiplexing device 4A, and together with the common information ECM data D _ECM supplied from the related information transmitting device 4B, Section
Create a data stream K3 (FIG. 2).

The related information transmitting device 4B multiplexes the common information ECM data D _ECM including the program guide data D _PMS into the multiplexing device 4B.
Give to A.

The multiplexing device 4A generates a transport stream K1 (FIG. 2) by performing a process of synthesizing a section data scream K3 with the program data stream K2 provided from the encoder 4C. This transport stream K1
Is scrambled by the scramble key data D _Ks generated from the related information transmitting device 4B in the scrambling device 4D, and then transmitted as a satellite wave S1 via the uplink device 4E and the antenna device 4F sequentially.

In FIG. 8, transmitting stations 15A to 15D
1st channel 1CH based on satellite wave S1 of center station 4
Is received by the antenna device 15K1 and given to the receiver 15K2 with a built-in decoder having the individual information EMM monitor 15K2A.

The receiver with built-in decoder 15K2 separates the individual information EMM in the personal information EMM monitor 15K2A and separates the individual information EMM into individual information EMM data D _EMM.
3 and multiplexed with the program data stream K2 obtained from the encoder 15K4, and transmitted as satellite waves S2A, S3A to S2D, and S3D via the uplink device 15K5 and the antenna device 15K1.

In FIG. 9, the receiver 6 of the broadcast receiver
A, 6B... Receive the broadcast waves SB1, SB2, and SB3 of the first, second, and third channels via the antenna device 6K1 to the receiver with built-in decoder 6K2 having the descramble device 6K2A, and have made a reception contract. When the security module 7G distributed to the broadcast receiver is used, the individual information EMM is decrypted by the master key Km data written in the security module 7G, the work key Kw is taken out, and the security module is obtained. Remember in Yule.

Using this work key Kw, common information ECM
The descrambler 6K obtains the scramble key Ks data D _Ks for the scramble key Ks from the data D _ECM.
2A, the program can be viewed on the receiver with built-in decoder 6K2.

In the above configuration, the center station 4 occupies the occupied frequency band F _BAND of the transponder 3 of the communication broadcasting satellite 2.
The transport stream K1 (FIG. 2) is transmitted to the communication broadcasting satellite 2 as the satellite wave S1 using the transmission frequency of the first channel 1CH, and the broadcast wave SB1 corresponding to the first channel 1CH of the transponder 3 is transmitted. , General broadcast receivers 6A and 6B, which are satellite ground stations.
Broadcast to.

In this state, a general broadcast receiver
First channel 1 of transponder 3 of communication broadcasting satellite 2
By selecting a channel, a program can be received based on the program data stream K2 (FIG. 2) broadcast from the center station 4, and individual information EMM can be received based on the section data stream K3 (FIG. 2). Can be received.

In this state, the broadcast wave SB broadcast by the first channel 1CH of the transponder 3
1 is intercepted by the transmitting stations 5A to 5D, which are satellite ground stations, whereby the program specification information PSI contained in the header of the transport packet of the broadcast wave SB1 and all broadcast receptions for which a reception contract is made. The transmitting stations 5A to 5D always receive the individual information EMM of the sender. The transmitting stations 5A to 5D transmit the program specification information PS
I's Network Information Table NI
Based on the descriptor data D4 described in T (FIGS. 3, 4 and 5), each of the transmitting stations 5A to 5D uses its own transponder 3 for the second channel 2CH or the third channel 3CH. It is monitored whether or not the permission has been issued from the center station 4.

The center station 4, as the broadcast time elapses,
The transmitting station to use the second channel 3CH or the third channel 3CH of the transponder 3 is determined by the service ID data D22 (FIG. 5) of the descriptor data D6 (FIG. 3) of the network information table NIT. Go to specify.

In this manner, among the transmitting stations 5A to 5D, the transmitting stations 5A to 5D, for which the use of the second channel 2CH or the third channel 3CH of the transponder 3 is permitted by the center station 4, are used. At the permitted transmission frequency of the second channel 2CH or the third channel 3CH, the data of the transport stream K1 (FIG. 2) created by the own station is transmitted to the satellite wave S2A or S3A to S2.
The data is transmitted to the communication broadcasting satellite 2 as D or S3D.

At this time, the transmitting stations 5A to 5D, as shown in FIG.
A transformer formed by adding to the data stream K2 a section data stream K3 including the individual information EMM received from the center station 4 (consisting of the individual information EMM of all broadcast receivers who have subscribed). port·
The stream K1 is transmitted to the communication broadcasting satellite 2.

The transponder 3 of the communication broadcasting satellite 2 transmits the satellite wave S2A or S2A transmitted from the transmitting stations 5A to 5D.
Broadcast wave SB2 or S corresponding to 3A to S2D or S3D
B3 is broadcast to receiving devices 6A, 6B,... Of general broadcast receivers.

Therefore, a general broadcast receiver receives the broadcast
By selecting the first channel 1CH, the second channel 2CH, or the third channel 3CH of the transponder 3 by A, 6B,..., The program information transmitted from the center station 4 or the transmitting stations 5A to 5D and Based on the individual information EMM, the center station 4 or each of the transmitting stations 5A to 5D
Can be received.

In the above configuration, the center station 4 uses the first channel 1CH of the transponder 3 to transmit the broadcast wave SB.
When broadcasting No. 1, all the transmission contracts with the use permission information of the second and third channels 2CH and 3CH shared with the transmission stations 5A to 5D are included in the transport packet of the transport stream K1. By transmitting the individual information EMM representing the contract content of the broadcast receiver, the transmitting stations 5A to 5D transmit the broadcast wave S
Each of the transmitting stations 5 has a simple configuration that only intercepts B1.
A to 5D can know the channel number of the transponder 3 that can be used, and also, for the program data created in the own station, separate information EMM indicating the contents of the receiving contract of all the broadcast receivers who have subscribed to the program data. Satellite wave S2A or S3A to S2D or S3 in addition to station program information
By being transmitted to the transponder 3 as D, it can be transmitted to the broadcast receiver who has made the reception contract.

Thus, the broadcast receiver who has subscribed to the reception
Using the security module 7G distributed by the customer management center 7, only the program for which the reception contract has been made can be viewed by decrypting it.

In this case, the transmission from the center station 4 to the transmission station 5
Since it is not necessary to use a terrestrial network as a means for transmitting the individual information EMM to A to 5D, the configuration of the entire broadcasting system 1 can be further simplified, and the individual information transmitted from the center station can be further reduced. Information EM
M can be added to the program information of the own station and broadcasted,
The transmitting stations 5A to 5A are almost synchronized with the center station 4.
The individual information EMM can be transmitted from D to the broadcast receiver.

In the above-described embodiment, a case has been described in which a broadcast channel dedicated to the center station 4 is provided in a part of the frequency band of the transponder 3. , Transmitting stations 5A-5
A dedicated home channel having an occupied frequency band other than the occupied frequency band of D is provided, and the dedicated home channel is assigned to a multi-channel transmission scheme MCPC (a broadcast channel of a transmission frequency of one occupied frequency band is used for a plurality of channels). The individual information EMM may be transmitted by a transmission method for transmitting information.

[0078]

As described above, according to the present invention, a broadcast channel dedicated to a center station is provided in a satellite repeater of a communication broadcasting satellite, and a reception contract is made for a satellite wave from the center station to the dedicated broadcast channel. By adding the broadcast receiver's contract information as individual information EMM and broadcasting as a broadcast wave, and enabling the broadcast wave of the center station to be intercepted by other transmitting stations constituting the satellite ground station,
Broadcasting the individual information EMM from each transmitting station to the receiver of the broadcast receiver without synchronizing with the center station without preparing a terrestrial network or the like as a system for distributing the individual information EMM to the transmitting station. Can be.

[Brief description of the drawings]

FIG. 1 is a schematic system diagram showing an embodiment of a broadcasting system according to the present invention.

FIG. 2 is a schematic diagram showing a data structure of a transport stream constituting a satellite wave transmitted from a center station and a transmitting station in FIG. 1;

FIG. 3 is a schematic diagram illustrating a data configuration of a network information table NIT included in the satellite wave S1 of FIG. 1;

FIG. 4 is a schematic diagram illustrating a data configuration of satellite delivery system descriptor data D10 included in descriptor data D6 of FIG. 3;

FIG. 5 is a schematic diagram illustrating a data configuration of service list descriptor data D20 included in descriptor data D6 of FIG. 3;

FIG. 6 is a schematic system diagram for explaining a reception contract procedure.

FIG. 7 is a schematic system diagram showing a detailed configuration of a center station 4 in FIG. 1;

FIG. 8 is a schematic system diagram showing a detailed configuration of transmitting stations 5A to 5D in FIG. 1;

9 is a schematic system diagram showing a detailed configuration of broadcast receivers 6A, 6B... Of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Broadcast system, 2 ... Communication broadcasting satellite, 3 ... Transponder (satellite repeater), 4 ... Center station, 5A-5
D: transmitting station, (6A, 6B,...) Receiving device of broadcast receiver, 7: customer management center.

Claims (6)

[Claims] 1. A satellite transponder mounted on a satellite and having a plurality of broadcast channels, and one of the plurality of broadcast channels is assigned as a dedicated channel, and first individual information relating to a receiving device of a general broadcast receiver. And a center station that broadcasts to the receiving device of the general broadcast receiver as a broadcast wave of the dedicated channel of the satellite repeater, and intercepts the broadcast wave of the center station. The first individual information is separated, and the separated first individual information is added as second individual information to the program information of the own station, and the broadcasting channel other than the dedicated channel of the satellite repeater is added. And a satellite ground station that broadcasts the broadcast wave to a receiver of the general broadcast receiver. 2. The general broadcasting receiver of claim 1, wherein the first and second individual information include a receiving contract condition of all of the general broadcasting receivers, and the receiving device of the general broadcasting receiver operates the dedicated channel or a device other than the dedicated channel. When a broadcast wave of a channel is received, only a program that matches a reception contract condition included in the transmitted first or second individual information can be decrypted and viewed. The satellite broadcasting device according to claim 1. 3. The system according to claim 1, further comprising a customer management center for creating said first individual information based on a reception contract condition of said general broadcast receiver, wherein said customer management center is provided based on said first individual information. Distributes a security module that writes security information including encryption / decryption key information for a program for which reception has been subscribed, to the receiving device of the general broadcast receiver who has subscribed to the reception, and the general broadcast receiver receiving device has the following configuration: 3. The satellite broadcast apparatus according to claim 2, wherein a decryption process is performed using the security information of the security module. 4. One of a plurality of broadcast channels provided in a satellite transponder mounted on a satellite is allocated to a center station as a dedicated channel, and the center station transmits a first broadcast signal to a receiver of a general broadcast receiver. Is added to the program information to be broadcast,
The broadcast wave of the dedicated channel of the satellite repeater is broadcast, the broadcast wave of the center station is intercepted by a satellite ground station, the first individual information is separated, and the separated first individual information is separated. Information is added to the program information of the own station as second individual information, and is broadcast to a receiving device of the general broadcast receiver as a broadcast wave of a broadcast channel other than the dedicated channel of the satellite repeater. Satellite broadcasting method. 5. The first and second individual information include all of the general broadcast receiver's receiving contract conditions, and the general broadcast receiver's receiving device operates on the dedicated channel or a device other than the dedicated channel. When a broadcast wave of a channel is received, only a program that matches a reception contract condition included in the transmitted first or second individual information can be decrypted and viewed. The satellite broadcasting method according to claim 4. 6. The customer management center creates the first individual information based on a reception contract condition of the general broadcast receiver, and the customer management center receives the first individual information based on the first individual information. A security module in which security information including encryption / decryption key information is written for the contracted program is distributed to receiving devices of general broadcast recipients who have subscribed to the program, and the receiving device of the general broadcast receiver receives the security device. 6. The satellite broadcasting method according to claim 5, wherein the decryption process is performed using a module.