JPH04104559A - Data broadcast system - Google Patents

Abstract

PURPOSE:To easily manage toll broadcast and to reduce the production cost of a receiver by providing a receiver having a first processing means to process an information signal indicating contents of data broadcast and a second processing means to process information for control of reception of the data broadcast. CONSTITUTION:The first processing means which processes the information signal indicating contents of the data broadcast and the second processing means which processes information for control of reception of the data broadcast are provided. That is, a packet including information for control of reception of the data broadcast and a packet including the information signal indicating contents of the data broadcast are sent by a sending means of a transmitter, and information for control of reception of the data broadcast received by a reception means is processed in the second processing means based on a service discrimination code stored in the storage means of an IC card, and the information signal indicating contents of the data broadcast received by the reception means is processed in the first processing means corresponding to the discriminated code stored in the storage means of the IC card. Thus, the toll broadcast is easily managed and the production cost of the receiver is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a data broadcasting system that provides services by sending various data signals.

[Summary of the invention 1] The present invention transmits a packet containing information for controlling reception of the data broadcast by a transmitter, and receives the data broadcast by a receiver based on a service identification code stored in an IC card. However, information for controlling the reception of received data broadcasting is processed by an IC card, thereby facilitating the management of paid broadcasting and reducing the manufacturing cost of the receiver.

[Prior Art j] Conventionally, pay broadcast systems have been widely studied as systems applied to television broadcasts and high-definition television broadcasts (hereinafter referred to as high-definition broadcasts).

Video and audio signals that are generally broadcast on a paid basis are
The signal is scrambled (stirred) in some way so that it cannot be received by anyone other than those authorized to receive it, and those authorized to receive it are sent a signal to restore the scrambled signal. It is meant to be controlled. The information sent as a signal to control this reception is called related information, including information on the key to restore the scramble (scramble key ks), and whether the program to be broadcast is within the contract range of each receiver. This information includes information for determining whether or not the broadcast station is using the receiver, information for forcibly turning on or off a specific receiver from the broadcasting station, etc.

When satellite broadcasting is used for paid broadcasts such as TV Jijin and HiVision, related information is transmitted in the form of packets on a data channel. In this case, the scramble key and information regarding the broadcast program (this is called program information) are encrypted to prevent them from being known or tampered with by a third party. The key for this encryption is called a work key kw, and is separately sent to each recipient along with information representing the contract details of each recipient. This related information is called individual information and is sent via broadcast radio waves, physical media such as IC cards and magnetic cards, telephone lines, and the like. Of these, when sending by radio waves, it is necessary to encrypt the information, and the key used for this encryption is called a mask key km, which is different for each recipient in principle.

In this way, reception is controlled by sending program information and individual information, but program information is updated and sent at a frequency of, for example, about 1 second, and individual information depends on the business form of each broadcaster. , for example, at intervals of one month to one culm. Since this individual information differs for each recipient, it is necessary to send, for example, several million to several tens of million pieces of information per month.

[Problem to be Solved by the Invention 1] However, regarding data broadcasting, which provides services by sending various data signals over a broadcasting transmission path, there has been no specific study on a paid system, but related information is transmitted. A data broadcasting service is being planned in which various other data signals are unified and sent in the form of packets as shown in FIG. 7 using a data channel, and each service is identified by a header. Various types of data broadcasting services are considered, such as facsimile broadcasting, text broadcasting, still image broadcasting, telesoftware, telemusic, audio information broadcasting, and program code broadcasting. It is assumed that these data broadcasts will also be paid broadcasts as a form of business, and therefore, it is essential that the technical system of data broadcasting be able to perform pay broadcasts.

If data broadcasting is to be charged for various data broadcasts all at once, it is also possible to add a PN signal sequence in the same way as in the scramble of the audio of satellite television broadcasting. but,
Control becomes complicated if control such as billing is changed for each data broadcasting service. In particular, each service that uses satellite broadcasting data channels is transmitted in the form of packets, so the transmission position is not fixed and it is not easy to match the PN signal sequence on the transmitting and receiving sides. . Furthermore, when considering paid systems for data broadcasting, it is expected that the characteristics of the data signals handled, such as the amount of data, the required transmission speed, and the degree of damage in the event of eavesdropping, will differ depending on the service. For some types of services, high processing speed is required more than for protection against eavesdropping, while for other services, the amount of data is small but the information is extremely valuable, so it is necessary to increase the resistance against eavesdropping. I can think of something.

A unified fee-based system (including a signal scrambling system and a related information transmission/processing system to control this descrambling) will be adopted for these signals with different characteristics, such as those used for the aforementioned television and high-definition television. That is not a good idea.

Furthermore, it is expected that more operators will participate in data broadcasting services than in television, etc., and the problem of managing confidential information among these operators is expected to become complicated.

For these reasons, it is thought that there will be multiple paid systems for data broadcasting. On the other hand, from the receiver's side, it is not desirable to prepare a large number of devices, including paid decoders, every time a new service is received.

Therefore, although the form of the terminal differs depending on the nature of the data signal, it is necessary to unify the part that manages pay broadcasting as much as possible.

An object of the present invention is to provide a data broadcasting system that facilitates the management of paid broadcasting and reduces the manufacturing cost of receivers.

[Means for Solving the Problems 1] In order to achieve such an object, the present invention provides a packet containing information for controlling reception of the data broadcast and a packet containing an information signal representing the content of the data broadcast. A transmitter having a sending means for sending data, a receiving means for receiving data broadcasting, and a determination code in the processing means,
a receiver comprising: a first processing means for processing an information signal representing the content of the data broadcast received by the receiving means; a storage means storing a service identification code; a second processing means for processing information for controlling reception; and a storage means for storing the determination code for determining that the first processing means should process the information signal representing the content of data broadcasting. It is characterized by comprising an IC card having an IC card.

The present invention also provides a transmitter having a transmitting means for transmitting a packet containing information for controlling reception of the data broadcast and a packet containing an information signal representing the content of the data broadcast, and a receiver for receiving the data broadcast. and, when the determination code is the processing means, a first processing means for processing an information signal representing the content of the data broadcast received by the receiving means.
a receiver having a processing means; a storage means storing a service identification code; and a second receiver for processing information for controlling reception of data broadcasting received by the receiving means.
a processing means, and when the determination code is the processing means, a third processing means for processing an information signal representing the content of the data broadcast received by the receiving means; the first processing means and the third processing means;
The present invention is characterized by comprising an IC card having storage means storing the determination code for determining which of the processing means should perform the processing.

[Function] According to the present invention, a packet containing information for controlling reception of the data broadcasting and a packet containing an information signal representing the content of the data broadcasting are sent by the sending means of the transmitter,
Information for controlling reception of the data broadcast received by the receiving means is processed by the second processing means based on the service identification code stored in the storage means of the IC card, and the content of the data broadcast received by the receiving means is processed. The information signal representing the information is processed by the first processing means corresponding to the determination code stored in the storage means of the IC card.

Further, in the present invention, a packet containing information for controlling reception of the data broadcasting and a packet containing an information signal representing the content of the data broadcasting are sent out by the sending means of the transmitter, and are stored in the storage means of the IC card. The second processing means processes the information for controlling the reception of the data broadcast received by the receiving means based on the service identification code, and the processing means corresponds to the determination code stored in the storage means of the IC card. If the third processing means is the third processing means, the information signal representing the content of the received data broadcasting is sent to the third processing means of the IC card.
When the processing means corresponding to the determination code processed by the processing means and stored in the storage means is the first processing means, the information signal representing the content of the data broadcast received by the receiving means is transmitted to the first processing means of the receiver. Processed by

L Embodiment] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of the invention. This is an example of using a satellite broadcast data channel.

In the figure, 101a, 101b, . . . are data service sending devices, respectively. 102a, 102b
, . . . are scramblers that convert data strings sent by the data service sending devices 101a, 101b, . . . into random sequences. 10
3a, 103b, . . . are data service pay broadcast control devices, and scramblers 102a, 102, respectively.
b, . . . are controlled based on the pay broadcast system of the data service.

104a, 104b, . . . are IC card issuing devices, each of which is a data service pay broadcast control device 103a.
, 1 (13b,...), IC cards are issued according to the pay broadcast system of each data service.1
05 is a multiplexing device, scramblers 102a, 102
The scrambled signals are multiplexed onto a data channel of television broadcasting or high-definition broadcasting.

A transmitter 106 transmits a data channel signal from the multiplexer 105 along with video and audio signals.

The packets for each service basically consist of a packet for controlling the reception of paid broadcasting and a packet for the data portion of the signal. Packets for controlling the reception of paid broadcasting correspond to related information for paid broadcasting systems such as television, but in this embodiment, a specific header is not assigned, and packets are sent following the header of each service (with code 16). It is also possible to identify using the header if there is enough header space.

The information sent with the broadcast signal is contained within 288-bit long packets, which are the basic unit of information sent within a data channel. Of course, its length and amount of information can be varied depending on the applied transmission system.

2 is a BS tuner, and 3 is a MUSE decoder.

1 is a receiver, data channel decoder (DCD) 7
and a descrambler 8. 5 is a service decoder.

6 is an IC card that can be attached to and detached from receiver 1.
Contains programs for processing packets. The amount of information contained within the IC card 6 varies depending on the IC card used and its purpose, but the basic part is a code that specifies whether service identification and descrambling are to be performed inside or outside the IC. , includes the operator code, etc., and the contract type (specifies flat fee, tier, paver view, etc.) as a different part depending on the method.
, includes the identification code of the encryption method, the encryption/decryption algorithm, multiple sets of key numbers and keys, etc., and also includes the expiration date, contracted tier code, advance payment, etc. for each billing method. .

FIG. 2 shows the configuration of the first illustrated receiver 1. As shown in FIG.

In the figure, reference numeral 15 denotes a switch that switches between a path in which descramble processing is performed by the descrambler 8 in the receiver, and a path in which all signals are processed within the IC card.

In order to facilitate understanding when considering the data broadcasting pay system and basic receiver of this embodiment, the following (a) to (C) are explained below.
We assume the following operational format.

(a) A recipient who wishes to receive certain data services:
You can obtain an IC card by signing a contract with a broadcasting company and paying a fee. Also, without making a direct contract with a broadcaster, purchase an IC card that allows you to receive the desired service at a store, vending machine, etc.

(b) The receiver separately purchases a data broadcasting receiver and a service terminal. This data broadcasting receiver has an IC card reader/writer part (when integrated with a BS tuner,
(Various forms are conceivable, such as a case where only the common part of data broadcasting is an adapter). Connect the desired service terminal to the output of this data broadcasting receiver.

(C) The recipient inserts the IC card of the desired service and receives it.

Next, the processing procedure by the CPU 25 will be explained.

After the power is turned on and the IC card 6 is not inserted, the input signal 10 is directly output to the output terminal 11.

In this case, if the input pit stream is output as is, or if the data broadcasting receiver itself has a switch 12 for specifying the service header, only the packets having that header are selected by the data channel decoder (DCD) 13 (
There may be cases where the data is output as is (without any processing).

Then, when the IC card 6 is inserted into the receiver 1 and the IC card 6 is detected by the card sensor 21, it is determined whether the inserted IC card 6 is a correct IC card for data broadcasting. As a result of the determination, if the IC card is not correct for data broadcasting, insert the IC card into the receiver.
If the IC card is correct for data broadcasting, switch 22a and 22b. Next, the ladder code 14 is sent to the service stored in the IC card 6, a code indicating whether the signal descrambling process is to be performed by the IC card or by the descrambler 8 in the receiver 1, and the data to be processed by the IC card. A code 16 for identifying the packet containing the packet is sent to the receiver 1, and a ladder code 14 for service is set in the DCD 7.

(1) Then, a code indicating whether the signal descrambling processing is to be performed by an IC card or by the descrambler 8 in the receiver is written as a code indicating whether the descrambling processing is to be performed by the IC card or by the descrambler 8 in the receiver. Judgment based on As a result of the determination, if descrambling processing is to be performed using an IC card, switch 15 is switched to the "internal" side, and all packets output from D(1:D 7 are transferred to the IC card 6 side. Packets of each service are basically consists of a packet for controlling the reception of paid broadcasting and a packet for the data portion of the signal.First, the packet for controlling reception is taken into the IC card.This packet is stored in the IC card 6. If the data falls within the range of data that each recipient has contracted and is permitted to receive, the IC card 6 descrambles the packet of the data portion that is subsequently received. Then, the descrambled result is passed through the switch 15 from the output terminal 11 to each service decoder.

To end receiving the service, press the end reception button 17.
When is pressed, the IC card 6 is ejected.

(2) On the other hand, as a result of determining whether the signal descrambling process is to be performed by the IC card or by the descrambler 8 in the receiver, if the descrambling process is to be performed by the descrambler 8 in the receiver 1, the switch 15 is set to " Switch to "external" side. Then, based on the code 16 for identifying packets containing data to be processed by the IC card, the data separation unit 18 transfers only the packets containing data to be processed by the IC card to the IC card 6, and the remaining packets are transferred to the IC card 6. It is transferred to the PN sequence addition circuit 19. Among the packets transferred to the IC card 6, a packet called a PN sequence specification packet (related information for external processing method) is
When received by the IC card 6, one key is selected from the multiple keys stored in the IC card using the key number in the PN sequence specification packet (this part is not encrypted), and the IC card 6 selects one key from the multiple keys stored in the IC card.
The encrypted portion of the PN sequence designation packet is decrypted based on the encryption algorithm stored in the card 6. The obtained data are the structure of the PN sequence (connection information of the feedback shift register) and initial values, and these are output to the PN sequence generator 20. Then, it loads the structure and initial value data of the PN series sent from the IC card 6, starts at the same time as the service data is received by the DCD 7, and adds the PN series to the service data by the PN series addition circuit 19. do. Here, the structural data is stored in advance in the PN sequence generator 20, and only initial value data may be loaded from the IC card 6.

To end receiving the service, press the end reception button 17.
Press. When the reception end button 17 is pressed.

At the same time as the card is ejected, the PN sequence generator 20 is returned to its initial state (loaded with all 0s).

In the case of a pay-per-view system in which a fee is paid each time the program is actually received, a fee display 23 and a viewing confirmation button 24 for confirming viewing are required.

In addition, in Figure 2, multiple input/output lines are shown on the IC card 6 for convenience of explanation, but if the IC card to be used is, for example, an IC card with a built-in CPU that conforms to the ISO standard, the signal The input and output terminals are unified. Control of these various signals is generally performed using a PU 25 inside the receiver body.

FIG. 3 shows an example of the structure of related information sent together with a data broadcasting signal using a method in which descrambling is performed inside the IC card.

This related information is divided into a basic part that does not depend on the service, provider, billing method, etc., and a part that differs depending on the method.

The basic part includes the following contents (1) to (5).

(1) Header: This header is used to identify whether the data broadcasting service is, for example, facsimile broadcasting or teletext broadcasting, and is defined as 16 bits for data broadcasting using a data channel. 5 out of 16 bits
Bits are the information part, and 31 types of services (excluding dummy packets) can be identified.

(2) Type identification, identifying whether the packet sends the data part of each service or related information.

(3) Business code. Business operators wishing to conduct data broadcasting issue IC cards with their own descrambling processing, and use codes that enable them to broadcast signals with related information and control reception. be.

(4) Encryption method identification. This is to specify the processing method in the IC card, including the descrambling method. contains multiple processing programs,
It is used to specify which of them should be processed.

Furthermore, the information content of the basic part should not be used if the content of this related information (including information on parts that differ depending on the method) is tampered with or an error that cannot be corrected with an error correction code occurs due to a transmission error. This includes a code for tampering detection and check bits for error correction code.

However, since the tampering detection method of the tampering detection code can be changed depending on the encryption method, the number and position of bits can be changed depending on the encryption method. On the other hand,
The information included in the different parts depending on the method can be configured in any way by the operator code and the processing program in the IC card specified by the encryption method identification, and for example, it can be changed every time the IC card is reissued. You can also do that. Therefore, one example will be described here.

Please note that you only need to send what is necessary depending on your business type.

(1) Parameters within the encryption method specified by the key number or encryption method identification code. This is because a packet of related information sent with a broadcast signal always has an area that is encrypted to prevent fraud such as tampering, and a key to decrypt this code is sent separately in advance. Since the pay system for data broadcasting considered here uses an IC card, it is generally included in the IC card. I
Since the C card has a large capacity and can contain multiple keys, this key number specifies which one to use. It is possible to decrypt the IC card using the keys in the IC card in sequence without using this key number, and check with a tampering detection code whether or not the decryption has been performed correctly, but due to the processing time etc. It is more common to send a number.

(2) Year, month, day, hour, and minute. In the case of pay broadcasting, various billing methods are possible, and it is assumed that the charges vary depending on the service and the provider. With some types of services, if you pay a fee in advance, you may be able to receive the information freely for a certain period of time.

This billing method is called a flat fee one-way method, and an expiration date is written on, for example, an IC card in accordance with the paid fee.

When receiving a broadcast, the related information includes a date code in order to check whether the broadcast is within its expiration date. Additionally, hour and minute codes are also sent, which can be used to switch keys over time or to record viewing times.

(3) Tier code. Another billing method is the so-called tier system, in which programs and information are divided into several price ranks, and if you subscribe to a certain rank, you can receive all programs and information in that rank for a valid period. When a tier system is used to check the contract contents and the rank of programs and information to be broadcast, the related information includes a tier code.

(4) Pay-per-view viewing fees. Another billing method is pay-per-view, in which a price is set for each program or piece of information and a fee is paid each time the program or information is viewed. Among these, in the prepayment method, when you pay the amount in advance, the amount is recorded in, for example, an IC card, and the remaining amount is reduced each time you watch it on the receiver. includes viewing fee items.

(5) Program number. A pay-per-view (advance payment) sales method could be considered, for example, where if the same program or information is viewed twice, there is no charge for the second viewing. In such a case, it is necessary to check the viewed program and information, and for this purpose a program number code is sent. In addition, with the pay-per-view deferred payment method, you can record the programs and information you watched,
Charges are made based on that. The program number can also be used in this case.

On the other hand, the information contained inside the IC card includes, as basic parts, service identification, a code specifying whether descrambling is to be performed inside or outside the IC card, and a company code. In addition, the parts that differ depending on the method are:
Includes contract type (specify flat fee, tier, pay-per-view, etc.), encryption method identification code and decryption algorithm, key number and key (multiple sets), etc. In addition, corresponding to each billing method, expiration date, Includes contracted tier codes, advance payments, etc.

FIG. 4 shows an example of the structure of related information sent together with a data broadcasting signal using a method in which descrambling is performed outside the IC card.

Since much of the information is the same as the information related to the method of descrambling inside the IC card, only the different parts will be explained here. , First, when external processing is designated by the code of the descrambling processing structure from the IC card, only specific items such as packets of related information are sent to the IC card and processed. This packet is identified by type identification ■. The main one is a PN sequence designation packet, and when this is processed within the IC card, the structure and initial value of the PN sequence are obtained, and this is loaded into the PN sequence generator 20 within the receiver main body. If this information is known from the outside, fraud can be carried out, so it is sent in an encrypted form, and this code is decrypted inside the IC card. This encryption/decryption key number (specifying the key in the IC card) is sent as related information.

The parts that differ depending on the system differ depending on the service, broadcaster, billing method, etc. An example of this can be realized using a method similar to the method of processing inside the IC card described above.

The method of descrambling outside the IC card is also
The content of the information contained within the card can change depending on the service or broadcaster, so there is no particular change except that the signal descramble processing part is not included. Therefore, the explanation is omitted here.

By the way, the IC card used in the pay-for-deferred pay-per-view system requires an area to record viewing information. The method of recording viewing information depends on the type of business, but
All you have to do is record the broadcaster code, program number, and viewing fee you watched. In addition, if detailed information is not required, just the total viewing fee may be sufficient (or, if the IC card is different for each operator, the operator code can be omitted.Furthermore, the operator can input the program number and viewing fee). If you have a price correspondence table, you only need to record the program number.By the way,
In the case of pay-per-view, the number of programs viewed varies depending on the recipient, and there is also a limit to the capacity that can be recorded on an IC card. Therefore, if it is too late to convey the recorded data to the broadcaster, it is necessary to perform processing such as recording only the total amount.

In this embodiment, an example in which a data channel of satellite broadcasting is used has been described, but it goes without saying that the present invention can also be applied to broadcasting using other transmission paths.

In this embodiment, in order to facilitate understanding of the system, an example has been described in which the receiver and the IC card process only a single service at the same time, but there may be cases where processing of a plurality of services is required.

FIG. 5 shows a configuration example in which the IC card supports a single service and the receiver body supports multiple services. Only the main parts of the configuration of FIG. 2 are shown. Although the input is one pit stream, output terminals are prepared for a plurality of services, and the data demultiplexer 30 selects which output terminal the output signal of the processing result is output to. This selection is made based on the service identification code inside the IC card.

FIG. 6 shows an example of the configuration of a receiver in a case where the IC card and receiver main body support multiple services.

The input pit stream is converted into a serial packet string at the first stage of a data channel decoder (DCD) 37, for example. After that, DCD37 prepared in parallel
The packet separation circuit extracts the packet of the specified service from the IC card 6 and sends it to the IC card 6 for processing. The signal resulting from the processing is selected by the data demultiplexer 39 and output to a terminal designated by the IC card 6.

In principle, processing is carried out serially within the IC card 6, so the number of services that can be handled depends on the transmission speed and the processing speed of the IC card. In the external processing method, only the related information needs to be processed within the IC card, so if the related information is processed at appropriate intervals, PN sequence addition can be performed in parallel for each service. Therefore, it is necessary for the receiver main body to be configured to perform descrambling processing (at least PN sequence generation) separately for each service.

As explained above, in a wide variety of data broadcasting services, even if a pay system is introduced, receivers will be able to receive data with unified operations, and the operational format including broadcasters will be unified. become. In other words, the following (1) to (
4) can be obtained.

(1) Operation by the recipient is simple and easy to understand. Recipients can receive information by simply purchasing an IC card for the desired service and inserting it into a unified league. At the same time, billing for paid broadcasting is also being processed. However, if - number of recipients receive a large number of data broadcasting services, the problem arises with the basic system that the number of cards increases. This problem can be solved by storing information about multiple services in the IC card, but the method of card issuance, sales, and purchase becomes complicated when the card is issued by different broadcasters, so it is necessary to choose according to the purpose. .

(2) Since the main body of the data broadcasting receiver is common to each service, it can be mass-produced and there is no need for individual management at the distribution stage, so it can be sold at a low price in stores.

(3) When performing paid broadcasting, if there is a secret part inside the receiver body, the receiver manufacturer needs to receive some kind of control from the broadcaster, but in the system of this example, the receiver manufacturer and broadcaster This has the advantage that the management of paid broadcasting by operators can be separated.

(4) Data broadcasting services require a wide range of transmission speeds, but for low-speed services, signal descrambling processing is performed inside the IC card, while for services that require high speed, only the processing of related information is performed on the IC card. Descrambling is done inside the card, and descrambling is done using the PN in the paid decoder itself.
This can be done with a series addition circuit. These switching is I
Since this process is performed automatically using the information written on the C card and the information sent along with the broadcast signal, there is no difference in the receiver's operations.For this reason, the processing capacity of the IC card is If the service improves in the future, the same service can change the scrambling method to a method that processes it inside the IC card.This change will be applied to the IC card issued at the time of contract renewal.
All you need to do is rewrite the processing program inside the card, and when the new card starts operating, the change can be made automatically by scrambling and broadcasting the signal using the new method.

[Effect of the Invention 1 As explained above, according to the present invention, with the above configuration, it is possible to easily manage paid broadcasting and reduce the manufacturing cost of the receiver. be.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a block diagram showing an example of the configuration of the receiver shown in the first diagram. FIG. Figure 4 is a diagram showing a configuration example of related information for a method that performs descrambling processing outside the IC card. Figure 5 is a receiver that can support multiple services (the IC card only supports a single service). ), Figure 6 is a block diagram showing an example of the configuration of a receiver that can support multiple services (the IC card contains multiple services), Figure 7 shows an example of the configuration of a data channel packet. It is a diagram. DESCRIPTION OF SYMBOLS 1... Receiver, 2... BS tuner, 3... MUSE decoder, 5... Service decoder, 6... IC card, 7... Data channel decoder, 8... Descrambler, 101a, 101b...data service sending device,
102a, 102b ・”Scrambler, 103a,
103b... Data service pay broadcast control device, 105... Multiplexing device, 106... Transmitter.

Claims (1)

[Scope of Claims] 1) A transmitter having sending means for sending a packet containing information for controlling reception of the data broadcast and a packet containing an information signal representing the content of the data broadcast; and a transmitter for receiving the data broadcast. a receiver having a first processing means for processing an information signal representing the content of the data broadcast received by the receiving means when the determination code is the processing means; and a receiver storing a service identification code. a second processing means for processing information for controlling reception of data broadcasting received by the receiving means; and a second processing means for processing information signals representing the content of the data broadcasting;
1. A data broadcasting system comprising: an IC card having storage means storing the determination code for determining what should be processed by the processing means. 2) a transmitter having a sending means for sending out a packet containing information for controlling reception of the data broadcast and a packet containing an information signal representing the content of the data broadcast; a receiving means for receiving the data broadcast; and a determination. When the code is the processing means, a receiver comprising a first processing means for processing an information signal representing the content of the data broadcast received by the reception means; a storage means storing the service identification code; a second processing means for processing information for controlling reception of the data broadcast received by the receiving means; and when the determination code is for the processing means, an information signal representing the content of the data broadcast received by the receiving means; and storage means storing the determination code for determining whether the first processing means or the third processing means should process the information signal representing the content of the data broadcast. What is claimed is: 1. A data broadcasting system comprising: an IC card. 3) The data broadcasting system according to claim 1, wherein the first processing means performs descrambling processing based on information for controlling reception of data broadcasting. 4) The data broadcasting system according to claim 2, wherein the first and third processing means perform descrambling processing based on information for controlling reception of data broadcasting. 5) The data broadcasting system according to claim 3 or 4, wherein the information for controlling reception of data broadcasting is key information.