JP2012227952A - Broadcast transmitter and broadcast transmission method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible, efficient and simple method and device on both transmission and reception sides, capable of suppressing extreme degradation of response in EPG display at a receiver even when the number of channels is significantly increased in the future.SOLUTION: A broadcast transmitter comprises transmission means that transmits a plurality of transport streams in which EIT schedule information as information of EIT (Event Information Table) describing program information to be broadcast for a plurality of channels is made into a separate transport stream for exclusive SI (SI: Service Information) by the cycle group unit to be transmitted at an identical retransmission cycle.

Description

The present invention relates to a broadcast transmission apparatus and a broadcast transmission method used for digital broadcasting.
In particular, the broadcast transmission apparatus and the broadcast transmission method are devised so that transmission and reception of program arrangement information can be realized flexibly, efficiently and simply even when future multi-channel broadcasting is expanded.

In digital broadcasting, channel selection information and program information are generally multiplexed and transmitted as a broadcast signal in a format called TS (Transport Stream) defined by MPEG-2 Systems together with a video / audio signal of a program. The channel transmission information and program information encoding / transmission method is defined as ARIB STD-B10 as program arrangement information, and is based on SI (Service Informatio).
It is composed of various information tables also called n) (see Non-Patent Document 1).

In particular, channel selection information that describes the transmission frequency is NIT (Network Information Tabl.
e), BIT (Broadcaster Information Table), SDT (Service Description Table)
) And program information is described in an EIT (Event Information Table).

The receiver obtains this information and selects a program for channel selection or an electronic program guide (EPG: Electr).
onic Program Guide).

Each table of SI is multiplexed and transmitted in a section format. The transmitted SI is subjected to section extraction processing by the TS processor (TS decoder) of the receiver. However, since this processing speed is limited, in the broadcasting media such as BS and terrestrial, the transmission bandwidth of the SI total is used in the operation. An upper limit (maximum rate) is specified.

Also, in order to efficiently transmit SI within the upper limit of the transmission band, each broadcast media introduces the concept of a periodic group that is transmitted with the same retransmission period in each table of SI. The periodic group is basically NIT, BIT, SDT [actual], SDT.
Although it is configured for each SI table such as [other], in particular, EIT [schedule] (hereinafter referred to as EIT schedule information) describing program information scheduled to be broadcast is generally overwhelming as compared to other tables. It is also dominant in the entire SI information amount.

For this reason, with regard to EIT schedule information, the program information from the most recent period to a predetermined period is specially divided into several periodic groups, starting from the broadcast day, in order to improve transmission efficiency.

Here, ARIT TR-B15 “BS / Broadband CS Digital Broadcast Operation Regulations”, Part 4 (PSI / SI operation regulations) will be described as an example, focusing on EIT schedule information (see Non-Patent Document 2).

In the EIT schedule information, a basic cycle group and two extended cycle groups are defined.
In the EIT schedule information, event (hereinafter referred to as a program) information is transmitted collectively for each time zone called a segment obtained by dividing a day into three hours starting from midnight. FIG.
Indicates a periodic group of this EIT schedule information.

Here, the parameter D1 of the basic cycle group includes the broadcast day, and indicates the maximum transmission days (for example, 8 days) of the EIT schedule information thereafter. The parameters of the two extended period groups are denoted by S1 and S2, respectively.

S1 indicates the number of segments per service (channel selection unit, hereinafter referred to as channel), and includes a segment including the current time. S2 indicates the number of segments after S1. For example, B
In the case of S digital broadcasting, S1: 3 (segment), S2: 13 (segment), D1
: 8 (Sun).

Then, a predetermined retransmission cycle is set for each cycle group and multiplex transmission is performed.
From a statistical point of view, usually, the latest program information is set to shorten the retransmission cycle. For example, in the case of BS digital broadcasting, a retransmission period of S1: 10 seconds, S2: 10 seconds, and D1: 360 seconds is set as a default retransmission period.

Program Arrangement Information Used for Digital Broadcasting Standard ARIB STD-B10 4.3 Edition (revised on September 28, 2006), Publisher: The Japan Radio Industry Association, Date of Publication: September 2006 BS / Broadband CS digital broadcasting operation rules Technical data ARIB TR-B15 3.8 edition (revised on September 28, 2006), Volume 4 (PSI / SI operation rules), publisher: Radio Industries Association, Japan Date: September 2006

By the way, in broadcast media where the increase in the number of channels, such as BS (Broadcast Satellite) satellite broadcasting and IP broadcasting, can be realized relatively flexibly in accordance with the expansion of transmission facilities, the number of channels at the beginning of broadcasting and several years later. In some cases, a large difference on the scale of 2 to 3 times may occur.

Since the amount of transmission information of EIT schedule information increases in proportion to the increase in the number of channels,
In the case of a broadcasting system that transmits program information of all channels on all channels (TS) such as BS and broadband CS (Communication Satellite), the SI table is used to suppress the increase in transmission bandwidth and keep it within the upper limit. The only way to deal with this is to lengthen the retransmission cycle of each cycle group from the initial provisions of the broadcast.

However, if the retransmission cycle is lengthened, the time required for acquiring the SI table at the receiver becomes longer. The EPG display at the receiver receives and acquires these SI tables and stores and uses them as necessary. Generally, except for the case where the latest SI information that happens to be stored in the receiver is stored, the EPG is generally used. The response speed of the program information presentation in the display is reduced. Therefore, if the resending cycle becomes longer on a scale of 2 to 3 times, it takes too much time to present specific program information,
There is also concern that the EPG display will no longer function effectively.

Note that this is a centralized transmission of all EIT schedule information (hereinafter referred to as S
The situation is basically the same in another broadcasting system (denoted as I-dedicated TS).

As described above, in the conventional broadcast transmission apparatus and broadcast transmission method, when the number of channels is increased, there is a problem that the response speed of program information presentation in EPG display decreases.

The present invention provides a flexible, efficient, and simple broadcast transmitting apparatus for both transmission and reception so that extreme responsiveness deterioration in EPG display at the receiver can be reduced even if the number of channels greatly increases in the future. An object is to provide a broadcast transmission method.

In order to achieve the above object, according to the present invention, a cycle in which EIT schedule information, which is EIT (Event Information Table) information describing program information scheduled to be broadcast for a plurality of channels, is transmitted at the same retransmission cycle. Separate SI for each group (SI: Se
rvice Information) There is provided a broadcast transmission apparatus provided with a transmission means for transmitting a plurality of transport streams as dedicated transport streams.

In order to achieve the above object, in the present invention, EI which is EIT (Event Information Table) information describing program information scheduled to be broadcast for a plurality of channels.
Separate SI (for each periodic group unit transmitting T schedule information with the same retransmission period (
(SI: Service Information) A broadcast transmission method for transmitting a plurality of transport streams as dedicated transport streams is provided.

In order to achieve the above object, in the present invention, EI which is EIT (Event Information Table) information describing program information scheduled to be broadcast for a plurality of channels.
Transmission means for grouping in units of periodic groups having similar retransmission periods in the T schedule information and transmitting a plurality of transport streams as separate SI (SI: Service Information) dedicated transport streams for each of the grouped groups A broadcast transmission device comprising:

In order to achieve the above object, in the present invention, EI which is EIT (Event Information Table) information describing program information scheduled to be broadcast for a plurality of channels.
Broadcast transmission in which T groups are grouped in units of periodic groups having a similar retransmission period, and a plurality of transport streams are transmitted as separate SI (Service Information) dedicated transport streams for each group. Provide a method.

The present invention relating to the apparatus is also established as an invention relating to a method, and the present invention relating to a method is also established as an invention relating to an apparatus.
Further, the present invention relating to an apparatus or a method has a function for causing a computer to execute a procedure corresponding to the invention (or for causing a computer to function as a means corresponding to the invention, or for a computer to have a function corresponding to the invention. It can also be realized as a program (for realizing the program), and can also be realized as a computer-readable recording medium that records the program.

Explanatory drawing which shows an example of the transmitter of this invention. Explanatory drawing which shows the example ((a) 3TS division | segmentation transmission, (b) 2TS division | segmentation transmission, (c) 1TS transmission) of the transmission method of EIT schedule information. Explanatory drawing which shows an example of the data structure of the periodic group transmission designation | designated information of EIT schedule information. Explanatory drawing which shows an example of the receiver of this invention. The flowchart which shows an example of SI acquisition processing of the receiver of this invention. Explanatory drawing which shows the period group of EIT schedule information.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present specification, description will be made assuming that IP multicast broadcasting is also included as part of the broadcast.
(First embodiment)
Embodiments of the present invention will be described below with reference to the drawings. First, an example of the overall configuration of a digital broadcast transmitting apparatus according to the present invention is shown in FIG. In the figure, solid lines indicate the flow of program data such as SI, and wavy lines indicate control signals such as designation and instruction.

In FIG. 1, a broadcast signal 111 composed of video, audio, etc. is a video / audio encoding unit 11.
2 is compressed and encoded and output to the TS multiplexer 113. The TS multiplexer 113 multiplexes video and audio signals together with SI information such as EIT [p / f] generated by the SI generator 115 and outputs the result as a transport stream (TS). Here, for simplicity, it is assumed that there are a total of N channels as one service per TS.

The program related information 114 is information related to programs of all channels (N) scheduled to be broadcast now and in the future. The SI generation unit 115 stores these pieces of information in each section-format SI table, and each of the TS multiplexing units 121-1 according to the setting of the periodic group transmission TS setting unit 116.
23. In the periodic group transmission TS setting unit 116, an output destination TS is set in advance based on the table type and the periodic group. In particular, since the EIT schedule information has a very large amount of information, it is set to be divided into SI dedicated TSs 131, 132, and 133 for transmission for each periodic group.

The SI dedicated TSs 131, 132, and 133 collect EIT schedule information for all channels belonging to the same periodic group, and then multiplex and transmit them according to the retransmission period set by the periodic group retransmission period setting unit 117.

FIG. 2A shows this state. EIT schedule information for all channels belonging to the TV-type extended cycle group 1 (S1) is SI dedicated TS131, and EIT schedule information for all channels belonging to the extended cycle group 2 (S2) is SI dedicated TS132, S.
The EIT schedule information for all channels belonging to the basic cycle group (D1) excluding 1 and S2 is divided and transmitted by the SI dedicated TS 133, respectively.

In the periodic group transmission TS information in the periodic group transmission TS setting unit 116, E
Describe which periodic group of IT schedule information is transmitted in which TS, and SI
Multiplexed and transmitted.

FIG. 3 shows an example of the data structure of the periodic group transmission designation information of the EIT schedule information. This is a link descriptor described in ARIB STD-B10. This link type (link
In age_type), for example, an SI-dedicated TS for each periodic group is newly defined as follows.
SI dedicated TS (including S1): 0x80,
SI dedicated TS (including S2): 0x81,
SI dedicated TS (including D except S1 and S2): 0x82,
This descriptor can be specified by placing it in the NIT.
In the example of FIG. 2A, assuming that the SI dedicated TSs 131, 132, and 133 are on the same network and have the same original_network_id (whose value is X), transport_stream_id for identifying each is A, B, C Then, according to the structure of this descriptor,
SI dedicated TS131 link descriptor:
original_network_id = 'X',
transport_stream_id = 'A',
linkage_type = '0x80'
SI dedicated TS132 link descriptor:
original_network_id = 'X',
transport_stream_id = 'B',
linkage_type = '0x81'
SI dedicated TS 133 link descriptor:
original_network_id = 'X',
transport_stream_id = 'C',
linkage_type = '0x82'
For example, the above three may be arranged in a network loop of the NIT.
The definition may be made using other descriptor fields arranged in the NIT, or a new descriptor may be created and defined. In these cases, multiplex transmission is performed as a part of the SI, but the distribution method is not limited thereto. In broadcast media in which a bidirectional channel can be used as in the case of IP broadcasting, another information table describing these pieces of information may be distributed by unicast.

Moreover, although it does not mention clearly about the periodic group of SI other than EIT schedule information, since these all require a very narrow transmission band compared with EIT schedule information,
There is no problem even if the access efficiency is improved by multiplexing both the SI dedicated TS and the video / audio multiplexed TS.

Although not particularly shown, the outputs of the TS multiplexers 121, 122, 123, and 113 in FIG. 1 are transmitted after being subjected to error correction coding and modulation processing in satellite broadcasting, CATV, and terrestrial broadcasting. In IP broadcasting, after error correction coding processing, processing necessary for IP transmission including IP packetization is performed to generate a transmission signal for multicast distribution.

Next, FIG. 4 shows a basic configuration example of the receiving apparatus. In this embodiment, the broadcast signal is broadcast (
Although it is configured to be able to receive via on-air), the description will focus on the case of receiving via a communication path (IP network).

In FIG. 4, the digital broadcast receiving apparatus 401 includes a tuner unit 402 and a descrambler 4.
03, TS decoding unit 404, video / audio decoding unit 405, display processing unit 406, control unit 4
07, key input unit 408, IC card I / F unit 410, memory unit 412, communication processing unit 41
1 is comprised.

The tuner unit 402 selects a desired channel from the broadcast wave input to the digital broadcast receiving apparatus 401 and outputs a transport stream (TS) of the selected channel to the descrambler 403. The payload part of TS is generally scrambled for content protection.

The communication processing unit 411 is connected to a network line such as Ethernet (registered trademark), and performs transmission / reception processing of IP packet data via the network. Similar to the tuner unit 402, the communication processing unit 411 receives an IP packetized broadcast signal from the IP broadcast program distribution server, performs a decoding process on the error correction code applied in the IP transmission, and starts from the IP packet. The TS signal is extracted and output to the descrambler 403.

The descrambler 403 descrambles the TS input from the communication processing unit 411 and the tuner unit 402 and outputs the descrambled TS to the TS decoding unit 404.
The TS decoding unit 404 converts the TS input from the descrambler 403 from the PSI (Prog
Necessary packets are separated based on ram specific information, and broadcast program signals (video, audio) are extracted from the separated packets and various multiplexed data (various SI (Service Inform)
ation) data, ECM, EMM, etc.). Also, the TS decoding unit 404 outputs the separated broadcast program signal (video, audio) to the video / audio decoding unit 405.

The video / audio decoding unit 405 decodes the broadcast program signal (video, audio) input from the TS decoding unit 404 and outputs the decoded signal to the display processing unit 406.
The display processing unit 406 receives a broadcast program signal (video, video) input from the video / audio decoding unit 405.
(Sound) is output to an external monitor (not shown) for display / sound reproduction. The display processing unit 40
6 generates a display image signal of various error information in order to perform an interface function with the user, and outputs the generated image signal instead of the broadcast program signal (video, audio) or broadcast program signal (video, audio). ) And output the result. In addition, the display processing unit 406
Generates an EPG image signal composed of SI separated by the TS decoding unit 404 and outputs the generated image signal instead of the broadcast program signal (video, audio) or broadcast program signal (
(Video, audio) and output.

The key input unit 408 has a function of receiving a remote operation signal by infrared rays or the like from a user interface device such as a remote controller (remote controller) 409. Memory unit 4
Reference numeral 12 denotes a RAM and a nonvolatile memory. For example, part of channel selection information and program information is stored in the nonvolatile memory.

The control unit 407 has a function of controlling the above functions in an integrated manner, and controls each functional block by bus connection, serial communication connection, or the like.
The IC card I / F unit 410 is, for example, an IC that conforms to ISO 7816, which is an ISO standard.
It is a card interface.
The IC card 415 performs contract management and viewing control, and includes a CPU 419 and a ROM 41.
6, a RAM 417, a nonvolatile memory 420, an I / F unit 418, and the like, and is connected to the digital broadcast receiving apparatus 401 through an interface compliant with, for example, ISO 7816, which is an ISO standard. In the nonvolatile memory 420 in the IC card 415, at least a card ID and a card-specific key are set in advance.

The control unit 407 converts the EMM or ECM separated from the TS by the TS decoding unit 404 into the IC
The data is output to the IC card 415 via the card I / F unit 410. IC card 415 is an IC
When an EMM is input from the card I / F unit 410, the information is decrypted with a key unique to the IC card 415, and information acquired by a contract such as a work key (Kw) is stored in the nonvolatile memory 420 in the IC card 415. . Further, the IC card 415 is connected to the ECM from the IC card I / F unit 410.
Is decrypted with the work key (Kw) stored in the non-volatile memory 420 in the IC card 415, and it is determined whether or not the program can be viewed. The scramble key (Ks) is output to the digital broadcast receiving apparatus 401.

In the digital broadcast receiving apparatus 401, the control unit 407 sets the scramble key (Ks) input from the IC card 415 in the descrambler 403 so that the descrambler 403 can descramble the content and view the program. It becomes.

FIG. 5 is a flowchart showing an example of the control operation of the SI acquisition process in the control unit 407 in the digital broadcast receiving apparatus 401.
Step S501: Extract and acquire the periodic group transmission TS setting information of the transmission apparatus in FIG. 1, and proceed to Step S502. Specifically, in the example of FIG. 3, three link descriptors arranged in the NIT are extracted.

Step S502: The content of the periodic group transmission TS setting information obtained in step S501 is analyzed, three SI dedicated TSs and the periodic group of the EIT schedule information transmitted there are detected, and the process proceeds to step S503.

Step S503: In order to acquire EIT schedule information of the periodic group S1, the transmission TS (SI dedicated TS) is received, and the process proceeds to Step S504. In the case of BS digital broadcasting, as described above, this is done for three segments including the segment to which the current time belongs, that is, for nine hours.

Step S504: If the target EIT schedule information has not been acquired or if it has already been acquired, the process proceeds to step S505. Otherwise, step S504 is performed.
Go to 507.

Step S505: The EIT schedule information of the segment S1 is acquired based on the EIT schedule information obtained in step S504.
Step S506: If the end of acquisition of the EIT schedule information of the segment S1 is detected in step S505, the process proceeds to step S507, and if it is still being acquired, the process returns to step S505 to continue acquisition.

Step S507: To obtain the EIT schedule information of the next cycle group S2, the transmission TS (SI dedicated TS) is switched to, and the process returns to Step S504 to receive and repeat a series of processes.

Note that this is also the case of BS digital broadcasting, and the next 13 segments after S1,
That is, it corresponds to 39 hours.
If no update is detected in step S504, the process jumps to S507 and the next transmission TS.
(SI dedicated TS) is received promptly.
In the present invention, since EIT schedule information for all channels is divided and transmitted to each TS on a periodic group basis, it is necessary to perform TS switching when scrolling in the channel direction in the EPG display at the receiver. Therefore, as compared with the case where the SI dedicated TS is created for each group by grouping by channel, there is no response deterioration that takes time in displaying a specific channel corresponding to the TS boundary.

Regarding scrolling in the time direction, since the retransmission period is weighted statistically originally and TS switching is performed in units of period groups, response deterioration due to this switching is not noticeable.

As described above, according to the present invention, it is possible to secure a sufficient SI transmission band in each TS as compared with the case where the transmission apparatus transmits SI of all periodic groups, particularly EIT schedule information, in one TS. Shortening the retransmission cycle to improve the acquisition efficiency at the receiver, and even if the number of digital broadcasting channels increases, it is easy to keep within the upper limit of the band, and a flexible transmission system for expanding the number of channels It becomes possible.

In addition, by acquiring EIT schedule information from the specified TS transmitted in units of periodic groups in the receiving device, the number of channels and all channels can be increased even when the number of channels is greatly expanded without significantly increasing the load of SI acquisition management. EPG display is possible without significant deterioration of channel display responsiveness.

The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

(Second Embodiment)
If the number of channels is small and the transmission band is allowed as in the beginning of broadcasting, EIT schedule information of two periodic groups is grouped as shown in FIG.
The EIT schedule information of three periodic groups may be multiplexed and transmitted in one transmission TS (SI dedicated TS) as shown in FIG.

Note that if the number of SI dedicated TSs is reduced as in this embodiment, the overhead of time required for TS switching for SI acquisition is generally reduced, which is more efficient. As the number of channels increases, the number of SI dedicated TSs used for divisional transmission in units of periodic groups can be easily increased step by step.

Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined. For example, the first embodiment and the second embodiment may be combined and a genre and a channel may be combined as desired program attributes.

According to the present invention, it is possible to secure a sufficient SI transmission band in each TS as compared with the method of transmitting SI of all periodic groups, in particular, EIT schedule information, by one TS or all TSs in the transmission apparatus. A transmission system that can shorten the re-transmission cycle and improve acquisition efficiency at the receiver, or can easily fit within the upper limit of the band even if the number of digital broadcasting channels increases, and is flexible for expanding the number of channels Is possible.
In addition, by acquiring EIT schedule information from the specified TS transmitted in units of periodic groups in the receiving device, the number of channels and all channels can be increased even when the number of channels is greatly expanded without significantly increasing the load of SI acquisition management. EPG display is possible without significant deterioration of channel display responsiveness.

(Appendix)
(1) An input terminal to which EIT schedule information, which is EIT (Event Information Table) information describing program information scheduled to be broadcast, is input;
A dividing unit that divides the EIT schedule information into a plurality of period groups that are transmitted at the same retransmission period;
A broadcast transmission apparatus comprising: transmission means for transmitting a plurality of transport streams of the EIT schedule information divided by the division means.
(2) Enter EIT schedule information, which is EIT (Event Information Table) information describing program information scheduled to be broadcast,
The EIT schedule information is divided into a plurality of period group units transmitted at the same retransmission period,
A broadcast transmission method characterized by transmitting a plurality of transport streams of the divided EIT schedule information.
(3) An input terminal to which EIT schedule information, which is EIT (Event Information Table) information describing program information scheduled to be broadcast, is input;
In the EIT schedule information, a dividing unit that groups and divides a plurality of periodic groups having a similar retransmission period;
A broadcast transmission apparatus comprising: a transmission unit that transmits the transport stream of the EIT schedule information divided into a plurality of groups by grouping.

(4) Enter EIT schedule information, which is EIT (Event Information Table) information describing program information scheduled to be broadcast,
In the EIT schedule information, the group is divided into a plurality of groups of periodic groups having a similar retransmission period,
A broadcast transmission method characterized by transmitting the plurality of transport streams.
(5) SI (Service Information) for each periodic group unit transmitted at the same retransmission period
SI periodic group transmission designation means for designating a transport stream for transmitting
SI sending means for sending SI (Service Information) of a predetermined period group in the transport stream designated by the SI period group sending designation means;
SI cycle group retransmission cycle setting means for setting a retransmission cycle of SI (Service Information) in units of cycle groups;
A broadcast transmission apparatus comprising: SI cycle group transmission designation information transmission means for transmitting SI cycle group transmission designation information according to the designation of the SI cycle group transmission designation means.

(6) SI cycle group transmission designation information receiving means for receiving SI cycle group transmission designation information for detecting a transmission TS of each cycle group of SI (Service Information);
With reference to the SI cycle group transmission designation information received by the SI cycle group transmission designation information receiving means, SI cycle group transmission detection means for detecting a transmission TS of each cycle group of SI (Service Information);
For each transmission TS detected by the SI periodic group transmission detection means, the S of the periodic group unit
A broadcast receiving apparatus comprising: SI receiving means for receiving and acquiring I (Service Information).

(7) Receive SI cycle group transmission designation information for detecting a transmission TS of each cycle group of SI (Service Information),
With reference to the received SI cycle group transmission designation information, SI (Service Informat
ion) to detect the transmission TS of each periodic group,
A broadcast receiving method comprising receiving and acquiring SI (Service Information) in units of periodic groups for each detected transmission TS.

DESCRIPTION OF SYMBOLS 111 ... Broadcast signal, 112 ... Video / audio encoding part, 113 ... TS multiplexing part, 114 ... Program related information, 115 ... SI production | generation part, 116 ... Periodic group transmission TS setting part, 117 ... Periodic group retransmission period setting part 121-123 TS multiplexing units 131, 132, 133 ... S
I dedicated TS 401 401 digital broadcast receiver 402 tuner unit 403 descrambler 404 TS decoding unit 405 video / audio decoding unit 406 display processing unit 4
07: Control unit, 408: Key input unit, 409: Remote controller (remote controller), 41
0 ... IC card I / F unit, 412 ... memory unit, 411 ... communication processing unit, 412 ... memory unit,
415 ... IC card, 416 ... ROM, 417 ... RAM, 418 ... I / F unit, 419 ... C
PU, 420... Nonvolatile memory.

Claims (4)

EIT (Event Informatio) that describes broadcast program information for multiple channels
transmission means for transmitting a plurality of transport streams as separate SI (SI: Service Information) dedicated transport streams for each period group unit transmitting EIT schedule information as information in (n Table) at the same retransmission period; A broadcast transmission apparatus comprising: EIT (Event Informatio) that describes broadcast program information for multiple channels
broadcast transmission for transmitting a plurality of transport streams as separate SI (SI: Service Information) transport streams for each period group unit that transmits EIT schedule information, which is information in (n Table), at the same retransmission period Method. EIT (Event Informatio) that describes broadcast program information for multiple channels
n Table) EIT schedule information is grouped in units of periodic groups with similar retransmission periods, and a separate SI (SI: Service) is assigned to each group.
Information) A broadcast transmission apparatus including transmission means for transmitting a plurality of transport streams as dedicated transport streams. EIT (Event Informatio) that describes broadcast program information for multiple channels
n Table) EIT schedule information is grouped in units of periodic groups with similar retransmission periods, and a separate SI (SI: Service) is assigned to each group.
Information) A broadcast transmission method for transmitting a plurality of transport streams as dedicated transport streams.

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