JPH11163812A - Notice method for start of broadcasting emergency/notice information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inform a recipient of start of broadcast of emergency/notice information without increasing a load on a circuit of a receiver in a digital network. SOLUTION: A separate section 11 of a receiver 91 sends a frame of relating information 2 in a received data stream to an information destination separate section 9. When the destination of the frame is addressed to the information destination separate section 9 itself, the information destination separate section 9 sends the frame to a relating information 2 processing section 12 of a security module 92. When key information encrypted to view a program is in existence in the frame, the relating information 2 processing section 12 allows a decoding processing section 13 to decode the information and stores the result in a memory management section 15. When a start notice of an emergency/notice broadcast is in existence in the frame, the relating information 2 processing section 12 sends the frame to an output processing section 19 of the receiver 91. The output processing section 19 of the receiver 91 outputs it to the user upon the receipt of the start notice.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for broadcasting emergency / notification information such as disaster information in a digital network system such as a digital broadcasting network system and a digital communication network system.

[0002]

2. Description of the Related Art In a digital network system such as a digital CATV broadcasting system, only the receiver (subscriber) who has a qualification or right recognized by a contract or the like includes application data broadcast or communicated from a transmitting side. In some cases, it is necessary to provide confidentiality in order to be able to use.

[0003] This confidentiality can be generally realized by the following method.

[0004] In other words, the sender transmits the related information 2 in a format that can be received only by the recipient who is authorized to use the specific application data for providing confidentiality. The related information 1 is encrypted with the related information 2 and transmitted in a broadcast format.
Then, the specific application data is scrambled so as to be descrambled with the related information 1 and transmitted in a broadcast format. On the other hand, the receiver permitted to use the specific application data receives both the related information 1 and the related information 2, decodes the related information 1 with the related information 2, and scrambles the application scrambled with the decoded related information 1. Descramble and use the data. .

[0005] Digital networks that require confidentiality of such application data include, for example, MP
EG1 SYSTEMS (ISO / IEC11172-1) and MPEG2 SYSTEMS
Some broadcast networks and communication networks that use (ISO / IEC13818-1) require confidentiality, such as personal computer communication systems, video distribution systems using personal computers, CATV systems, terrestrial systems, and satellite broadcast systems. , Satellite communication systems, or these fee-based systems.

[0006] In a conventional broadcasting network or communication network that requires confidentiality of application data, unauthorized viewing of application data due to falsification or the like cannot be performed, as shown in, for example, Report No. 17 of the Consultation on the Telecommunications Technology Council. As described above, the following procedure is adopted as a specific technique of the above-described technique.

That is, the transmitting apparatus scrambles the application data and sets a session key (Ks) for descrambling the application data.
The common information having the descrambling key information is transmitted, and further, the individual information including the contract information for each subscriber and the decryption key information called the work key (Kw) for decrypting the common information, It is encrypted with the master key (Km) or personal key (Kp) and transmitted for each individual subscriber. Then, the receiving side device receives the individual information sent for each subscriber, extracts a work key with a master key / personal key, decrypts the common information with the extracted work key, and Extract the session key for scrambling,
Descramble the scramble of the target application data.

[0008] Here, ARIB STD-B1 1.0
As described in the edition, the common information is ECM (ISO / IEC 138).
18-1 MPEG2 SYSTEMS, Entitlement Control Messag
e), and the individual information is EMM (ISO / IEC138)
18-1 MPEG2 SYSTEMS, Entitlement Management Mes
sage). Then, in this case, the transmitting side uses the EMM storing the individual information.
The receiver sends the EMM with the decoder identification number identifying the individual receiver, and the receiving side extracts the transmitted EMM by the receiver's own decoder identification number at each receiver (EMM).
Filtering) and the master key (Km) or the private key (Km
p) to decrypt the work key (Kw), decrypt the previous ECM, extract the session key (Ks), and descramble the target application data using the extracted work key (Kw). Become.

By the way, in such a digital network, an emergency / announcement broadcasting service currently provided by an analog CATV network has not been realized.

[0010] Here, the emergency / notification broadcast serviced by the analog CATV network is realized as follows.

That is, the transmitting side transmits an emergency / announcement broadcast start signal at a local dedicated frequency different from the TV video / audio signal (frequency), and the receiving side is different from the TV video / audio signal processing circuit. The start signal is detected by the dedicated processing circuit, and the end user is notified that the emergency / notification broadcast has been started with a predetermined logical channel number, and a buzzer warning and LED lighting on the front of the main body are performed.

[0012]

With the increase in the number of subscribers of the digital network system, it is desired to realize emergency / announcement broadcasting in the digital network system.

However, when the above-described emergency / announcement information broadcasting technology of the analog CATV network is simply applied to the digital network, the following problem occurs.

In the digital network, the above-described application data, related information 1 and related information 2 are stored in different types of time division frames, and all of them are transmitted and received as a time division multiplexed data stream. If a dedicated communication channel for notifying the start of emergency / notification information is provided, such as a local dedicated frequency in an analog CATV network, the communication channel may be of a type assigned exclusively for notification of the start of emergency / notification broadcast. It must be transmitted to the receiving device as a time division frame. In this case, a new processing circuit for processing a time-division frame of a type allocated exclusively for notification of the start of emergency / notification information is provided separately from the conventional processing circuits for various time-division frames. It is necessary to significantly change the configuration of the existing receiver.

For example, in a digital broadcasting network system using satellites, the range of its subscribers is as follows.
It is not limited to one area like an analog CATV network, but is often nationwide. For this reason, there is also a problem that it is difficult to notify the start of emergency / announcement broadcasting such as disaster information in detail in each area. For example, it is conceivable to broadcast disaster information for each region by using a different receiver for each region.However, in this case, the receiver cannot be shared nationwide, In addition to increasing the cost of the receiver, a great burden is imposed when the recipient moves.

Accordingly, an object of the present invention is to realize the broadcasting of emergency / announcement information in a digital network without requiring a significant change in a receiver. Also,
In addition, another object of the present invention is to realize the broadcasting of emergency / notification information for a limited number of recipients using such a receiver. It is another object of the present invention to realize the broadcasting of emergency / notification information intended for a limited number of receivers using a receiver that does not differ for each individual receiver.

[0017]

In order to achieve the above object,
The present invention provides, for example, an encryption method in which a transmission apparatus broadcasts a first type frame including scrambled application data and encrypts key information for descrambling the application data in a second type frame. The broadcast including the key information, the third type of frame, including the decryption information for decrypting the key information, and transmitted to each receiving device, the receiving device, transmitted to the receiving device Receiving a third type frame, using the decryption information included in the received third type frame, decrypted the key information from the encryption key information included in the received second type frame, decrypted In a digital network using descrambling and using application data included in a first type frame received as key information, the transmitting device includes: The broadcast of the emergency / notification information is transmitted to the receiving device that performs the notification, including the notification of the start of the emergency / notification information, and the received device broadcasts the emergency / notification information in the third type frame transmitted to the receiving device. If the notification of the start is included, it is urgent for the user of the receiver device.
/ Emergency characterized by notifying the start of broadcast of announcement information /
Provided is a method of notifying the start of broadcast of notification information.

According to such a method of notifying the start of broadcast of emergency / notification information, the third type of frame for distributing decoded information includes the start notification of emergency / notification broadcast and distributes it to the receiver. The processing circuit for processing the third type of frame can process the start notification of the emergency / announcement broadcast,
It is not necessary to newly provide a processing circuit or the like for processing a frame of a type allocated exclusively for notification of the start of the related emergency / notification information.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below.

First, a first embodiment will be described.

FIG. 1 shows an example of the configuration of a network system to which the present embodiment is applied.

FIG. 1 shows the overall configuration of a service network using satellites.

As shown in the figure, the network system includes a transmitting device 5, a transmitting unit 60, an antenna unit (transmitting side).
61, satellite 63, antenna unit (receiving side) 64, receiving device 7
Consists of The transmitting device 5 includes a multiplexing device 1, a scrambler unit 3, a control information creating unit 2, and a multiplexing device 38.

Here, in recent years, MPEG2 (ISO / IEC1381)
Broadcasting networks and communication networks that require confidentiality using compression techniques such as 8) and MPEG1 (ISO / IEC11172) have begun to be widely used not only in Japan but also in Europe and the United States. Among them, many use satellites or cables.
A transmitter unit 60, an antenna unit (transmission side) 63, a satellite 6, and an antenna unit (reception side) 64 in FIG. 1 constitute a transmission system 600 in the case of using a satellite. When the present embodiment is applied to a network system to be used, a transmission system suitable for the adopted transmission medium is used instead.

Now, in the digital network shown in FIG. 1, the transmitting device 5 is input to the multiplexing device 1.
One or more, for example, Video Video, Audio Audio, Data Da
Application data such as ta is time-division multiplexed by the multiplexing device 1, and any specific application data is scrambled by the scrambler 3,
The data stream is time-division multiplexed by the multiplexing device 38 as one data stream, and the
Send to In addition, the receiving device 7, which is permitted to use the scrambled application data, descrambles and uses the received application data.
That is, the present digital network performs conditional access control.

Here, conditional access control means, as described in the report of the Telecommunications Technology Council's Advisory Council No. 74, scrambled application data so that only recipients with valid rights can receive the application data. This is a control in which information for descrambling this scramble is given only to a receiver having a legitimate right, and only the receiver receiving this information can descramble the scramble.

In the present embodiment, it is the control information creation unit 2 in FIG. 1 that creates information necessary for the conditional access control. The necessary control information includes related information 1 and related information 2. As described above, the related information 1 is MPEG2 SYSTEMS (ISO / IEC13818-1).
This corresponds to the ECM, and corresponds to the common information in the report of the Telecommunications Technology Council Advisory No. 74. The related information 2 is MPEG2
It corresponds to EMM in SYSTEMS (ISO / IEC13818-1), and corresponds to individual information in Report 74 of the Consultation on the Telecommunications Technology Council.

The control information creation unit 2 creates information for descrambling given to a receiver having a legitimate right, and inputs this information to the multiplexing device 38, so that the receiving side can descramble the scramble. Information (related information 1 and related information 2) is distributed. In addition, the control information creation unit 2 causes the scrambler 3 to scramble the application data by passing the scramble information corresponding to the information for descrambling to the scrambler 3.

In such a digital network, in the present embodiment, the control information creating unit 2 further inputs emergency / notification information to the multiplexing device 38,
The information is delivered to the receiving device 7 using a time-division frame of the information for descrambling. More specifically, the emergency / notification information is distributed to the receiving device 7 using a time-division frame of the related information 2 as described later.

Here, each receiving device 7 stores in advance a recipient ID for identifying each recipient, and a unique key different for each recipient.

Hereinafter, details of the processing performed by the transmitting device 5 and the receiving device 7 in such a digital network will be described.

First, the processing performed by the transmitting device 5 will be described.

FIG. 2 shows a processing procedure of this processing.

For example, when an event of registration of data to be distributed from an external input device occurs, S201, it is determined that a distribution event has occurred, S202, and in steps S203 to S206, the event of S201 is an object of registration in which the event is generated. Detects the type of distribution event that occurred based on the type of data received.

In FIG. 2, the types of distribution events are (1) an event instructing distribution of subscriber contract information (step S2).
03), (2) an event for instructing the start of a program (step S204), (3) an event for instructing the distribution of emergency / notification start notification information (step S205), and (4) (1) to (3). There are four events (step S206) for instructing other processes when different from any case.

When the distribution event is (1) an event instructing the distribution of the contract information of the subscriber (for example, Mr. P in FIG. 1) (S203), first, the contract information of the subscriber to be distributed is obtained. , The recipient's unique key (for example, Mr. P's unique key K
Encryption is performed in step p) (step S2031). The contract information to be distributed is, for example, identification information of a program contracted by Mr. P or a work key (Kw) of the program prepared in advance. Then, the related information 2 is created by adding the recipient ID of the destination Mr. P to the encrypted contract information (step S2032). The created related information 2 to which the receiver ID is attached is converted into a time division frame in the same manner as the time division of the application data (S2033). At this time, the time division frame is assigned a time division frame identification number indicating that it is related information 2 so that it can be distinguished from the time division frame of the related information 1 or the time division frame of the application data.

Next, when the distribution event is (2) an event for instructing the start of a program (S204), first, a scramble key to be applied to the program application data to be started is generated (S2041) and encrypted (S2041). S2042). At this time, for example, a work key of this program that differs for each program so that a receiver (receiver) having a valid viewing right can
(Kw) encrypts the scramble key. Next, related information 1 is created by adding program identification information for identifying the program to be started to the encrypted scramble key information (step S2).
043). Note that the program identification information given here may be encrypted with another different key. The created related information 1 is converted into a time-sharing frame in the same manner as the time-sharing frame of the application data and the time-sharing frame of the related information 2 (step S2044). At this time, the time-division frame has a time-division frame identification number indicating that it is the relevant information 1 relating to the application data of this program so that it can be identified as the time-division frame of the relevant information 2 or the time-division frame of the application data. Attach. And then,
The created scramble key (Ks) and the time-division frame identification number of the application data corresponding to the scramble are set in the scrambler 3 of FIG. 1 so that the scrambler 3 scrambles with the scramble key (Ks) that created this program. It controls (step S2045).

Next, when the distribution event is (3) an event instructing distribution of start notification information of emergency / announcement broadcast.
(S205), an emergency / notification broadcast start notification parameter is created (step S2051), and the associated information 2 is created by attaching the receiver ID of the subscriber to be delivered (step S20).
52). The created related information 2 with the receiver ID is converted into a time-division frame in the same manner as the time-division frame of the application data (step S2053). At this time, the time-division frame is assigned a time-division frame identification number indicating that it is the relevant information 2 so that it can be distinguished from the time-division frame of the relevant information 1 and the time-division frame of the application data (step S2053).

As described above, the related information 1 and the related information 2 which are created in accordance with the type of the distribution event and are divided into time-division frames.
Are transmitted to the multiplexer 1 of FIG. 1 to form a data stream together with the time-division frame of the application data (step S207), and perform transmission processing appropriate for the transmission medium and transmit (step S208).

Next, the processing performed by the receiving device 7 will be described.

FIG. 3 shows a process performed by the receiving device 7.

In this process, when the data stream transmitted by the transmitting device 5 is received (step S301), first, as a preparation, a receiver ID (for example, P Mr Recipient I
D) is read (step S302). Next, the time division frame identification number of the related information 2 is set in the separation unit inside the receiving device 7 so that the time division frame of the related information 2 in the data stream can be separated (step S303). If a channel selection operation is performed in this state (step S304), the time-division frame identification number of the related information 1 of the application data of the selected program is set to the separation unit, similarly to the related information 2 (step S3041). . That is, the identification number of the time division frame is set to the separation unit so that the time division frame of the related information 1 of the target application data in the data stream can be separated.

Here, when the time-division frame of the related information 2 is received and the destination of the related information 2 is its own receiver ID value (the receiver ID of Mr. P) (step S305), first, The unique key (Kp) of the receiver (Mr. P) provided in the receiving device is read, and the decryption processing of the related information 2 is performed using this key (step S3051). As a result of the processing, it is determined that the data of the related information 2 is the contract information required by the subscriber (step S305).
2), the data is stored and managed (step S3053).
The contract information required by the subscriber is, for example, identification information of a program contracted by Mr. P or a work key (Kw) of the program. Next, the receiving device 7 detects whether or not the emergency / notification broadcast start notification parameter exists in the data of the related information 2 as a result of the processing in step S3051 (step S3054). As a result of the detection, if the start notification parameter exists in the data of the related information 2, the receiving device notifies the user of the start (step S3055).

On the other hand, the receiver selects related information 1 by tuning.
When the time-division frame is received (step S306), the program identification information in the related information 1 and the program identification of the contracted program previously transmitted as the related information 2 and already stored and managed by the receiving device 7 are received. All information and collation (step S30
61). Here, if the collation does not match with all the program identification information stored and managed (step S3061).
NG), the related information 1 thus separated is discarded (ignored), and reception prohibition (viewing prohibition) is performed (step S3063). On the other hand, when it corresponds to any of the program identification information stored and managed (OK in step S3061), for example, when the relevant information 2 corresponds to the identification information of the program distributed as the contract information of Mr. P The decryption processing of the related information 1 is performed using the work key (Kw) of the program identification information stored and managed, and the scramble key (Ks) stored in the related information 1 obtained as a result is decrypted. Set as descrambler
(Step S3062). In the descrambler, this key (Ks)
Thus, the scramble of the time-division frame of the target application data is descrambled.

Hereinafter, the details of the configurations of the transmitting device 5 and the receiving device 7 that perform such processing will be described.

First, FIG. 4 shows the configuration of the transmitting device 5.

In the figure, application data such as video, audio, data, and data are all converted into time-division frames by a time-division frame creation unit 31, and time-division frame identification is performed so that all time-division frames can be identified. Numbered. At this time, the video data
o, the audio data Audio may be compressed. In this case, the audio data Audio is compressed by the video encoder 29 and the audio encoder 30, respectively. For example, the video encoder 29
MPEG2 Video (ISO / IEC13818-2) encoder,
MPEG2 Audio (ISO / IEC1381)
8-3) Encoder.

Now, the time-division frames of all these application data are multiplexed by the multiplexing device 1 to form one data stream 4 composed of a plurality of time-division frames.
Transmit as 0. At this time, the scrambler 3 scrambles the time-division frame of any specific application data with an arbitrary scramble key (Ks) specified by the control line 41.

On the other hand, when a registration event of control data to be distributed occurs in the input device 34, a control data distribution event occurs. If the distribution event that occurred at the input device 34 is the distribution of contract information to be sent to a subscriber (for example, Mr. P), the contract information of the related information 2 creating unit 35 is transmitted from the input device 34 via the control line 43. It instructs the processing unit 351 to distribute the receiving destination (Mr. P) and the contract information (for example, the program identification information of the program contracted by Mr. P and its work key Kw). In response to this, the contract information processing unit 351 first searches for the relevant recipient's unique key (Mr. P's unique key Kp) among the unique keys of all the subscribers. The retrieved key is used to encrypt the contract information to be sent to Mr. P, and the encrypted contract information
The related information 2 (the information area 63 in FIG. 6 described later) is created by attaching the recipient ID of Mr. P.

In the input device 34, a distribution event of the start notification of the emergency / notification broadcast occurs, and the subscriber (Mr. P)
When the start notification is distributed to the
The notification of the receiving destination (Mr. P) and the distribution instruction of the emergency / notification start notification are given to the emergency / notification broadcast start notification processing unit 352 of the related information 2 creating unit 35 via 3. In response to this, the emergency / announcement broadcast start notification processing unit 352 creates an emergency / announcement broadcast start notification parameter, attaches the recipient ID of the destination Mr. P to the created data, and adds the relevant information 2 (for example, An information area 65) of FIG. 7 described later is created. The value of the start notification parameter is a value corresponding to the distribution event of the start notification of the emergency / notification broadcast. This means, for example, that a delivery event is the most important
The value of the start notification parameter is switched between when the start of the notification broadcast is indicated and when the start of the general emergency / notification broadcast is indicated.

Here, the start of the emergency / announcement broadcast may be notified to the recipient as mail data. In this case, the input device 34 sends the related information 2 creation unit 35 via the control line 43 to the related information 2 creation unit 35. Instructs mail delivery of the notification of the recipient (Mr. P) and the notification of the emergency / notification start. Upon receiving this, the emergency / notification information broadcast start notification processing unit 352 of the related information 2 creation unit 35
Creates an emergency / notification information broadcast start notification text (email data) and a start notification parameter in the same manner as described above, and attaches the recipient ID of the destination Mr. P to the created data to associate information 2 (for example, An information area 69 shown in FIG. 8I or an information area 70 shown in FIG.

Next, when an arbitrary specific program distribution event occurs in the input device 34, first, the program identification number of the program to be registered is designated from the input device 34 via the control line 43. Upon receiving this, the related information 2 creation unit 35 searches for the work key (Kw) of the program identification number generated and managed in the own creation unit 35, and finds the program identification number and the work key.
(Kw) is passed to the related information 1 creation unit 36 via the control line 44. The related information 1 creating unit 36 receiving the information stores and manages the information.

Further, in this program distribution event, the related information 1 creating unit 3 is connected to the input device 34 via the control line 42.
6, the program identification information of the program to be registered and the time-division frame identification number of the application data to be scrambled are passed. In response, the related information 1 creation unit 3
In 6, the work key (Kw) of the program identification information corresponding to the program identification information instructed from the control line 42 is searched from all the work key information held in the self-creation unit 36. The retrieved key is used for encrypting the scramble key information to be applied to the time-division frame of the application data. At this time, the creating unit 36 creates the scramble key information and encrypts it with the work key of the search result. I do. Further, the creating unit 36 creates the related information 1 (for example, the information area 57 in FIG. 9 described later) by adding the program identification information to the encrypted scramble key information so that the receiving side can identify the target program. . When the related information 1 is created, the related information 1 creating unit 36 gives the scrambler 3 via the control line 41 the time-division frame identification number of the target application data to be scrambled and the scramble key information.
(Ks). In accordance with the received information, the scrambler 3 scrambles the time-division frame of the target application data and outputs the data stream 40.

As described above, the related information 2 created by the related information 2 creating unit 35 and the related information 1 created by the related information 1 creating unit 36 by the above-described processing are respectively associated with the time-division frame creation. The related information 1 is passed to the means 33 and passed to the time-division frame creation means 32, and the time-division frame creation means 33 and 32 form time-division frames. At this time, the time-division frame of the related information 2 is assigned a time-division frame identification number indicating that it is the related information 2, and the time-division frame of the related information 1 uses the scramble key information of the related information 1. A time-division frame identification number indicating that it is related information 1 relating to application data of a program is added.

The time-division frame creating means 33 transmits the related information 2 to the multiplexing device 38 via the signal line 45. Further, the related information 1 converted into a time-division frame by the time-division frame generating means 32 is transmitted to the multiplexer 38 via the signal line 46 by the time-division frame generating means 32. Thus, the multiplexer 38 multiplexes the received time-division frame of the related information 2 or the received time-division frame of the relevant information 1 into, for example, the data stream 40 shown in FIG. Transmit.

Here, the structure of each time-division frame and data stream described above will be described.

FIG. 5 shows video Video, audio Audio, and data Da.
3 shows an example of a format configuration of a time-division frame of application data such as ta.

As shown in FIG. 5, time-division frames include:
Synchronous data 54 is attached. This is the same in the time division frame of the related information 1 or the related information 2. In addition, a time division frame identification number 55 is assigned to all time division frames. This also applies to the time division frame of the related information 1 or the related information 2. The time-division frame identification number 55 corresponds to MPEG2 SYSTEMS (ISO / IEC13818-
This corresponds to 1) Packet IDentifier (PID). The time division frame identification number 55 of the time division frame of the application data is set corresponding to the program of the application data.

Next, FIGS. 6, 7, and 8 show examples of the format configuration of the time-division frame of the related information 2. FIG. 6 shows the related information 2 storing the contract information, and FIG. FIG. 8 relates to the related information 2 storing the start of the announcement / information broadcast, and FIG. 8 relates to the related information 2 storing the start text of the emergency / notification information broadcast as mail data.

As shown in each figure, in the time-division frame of the related information 2, a receiver ID (for example, a receiver ID of Mr. P) 61 addressed to a specific subscriber is provided. Related information 2
, The same value is set as the time-division frame identification number regardless of its contents.

In the related information 2 storing the contract information shown in FIG. 6, an information area 63 is stored. This information area 6
In No. 3, security information 62 is stored as contract information addressed to the subscriber (for example, Mr. P). The security information 60 is, for example, an identification number of a program contracted by Mr. P and its work key Kw. In this case, the security information 60 is encrypted by the transmitting device using, for example, a unique key (Kp) unique to each subscriber.
However, if the confidentiality is protected by another mechanism, the encryption need not be performed.

In the time-division frame of the related information 2 storing the start of the emergency / announcement information broadcast of FIG. 7, an information area 65 including the emergency / announcement broadcast start notification parameter 64 is stored. Here, when the related information 2 storing the start of the emergency / notification information broadcast and the related information 2 storing the contract information are generated at the same time, the security information 62 similar to FIG. Accordingly, the two related information 2 may be combined into one time-division frame.

Next, the time division frame of the related information 2 in which the start sentence of the emergency / notification information broadcast of FIG. 8 is stored as mail data may be in any of the formats (I) and (II) in the figure. (I) in the information area 69 and (II) in the information area 70 include emergency / notification broadcast start notification mail data.

In the information area 69 of (I), a mail instruction 66 indicating that mail data is stored in the information area 69 is stored. The receiving side can recognize from the mail instruction 66 that mail data is stored in the information area 69. Further, (1) information area 69
Then, a mail content identifier 67 for identifying what the mail data is is stored. On the receiving side, the content of the mail data 68 (for example, whether or not the received mail data has been received) is identified by the mail content identifier 67.
Can be identified. Further, (1) a start notification parameter 64 similar to that of FIG. 7 is stored in the information area 69 to indicate that the mail data is a start notification mail of an emergency / notification broadcast. With the start notification parameter 64, (1) the receiving side that has processed the information area 69 can identify that the mail data 68 is an emergency / notification start notification mail.

Next, as in (I), the information area 70 of (II) includes a mail instruction 66 indicating that mail data is stored in the information area 70 and an identification of what the mail data is. A mail content identifier 67 is stored. Here, in (II), unlike the information area 69 of (I), by using this area of the mail content identifier 67, it is possible to recognize that the mail data 68 is an emergency / notification broadcast start notification mail. I have.

That is, the mail data is sent to the receiving side in an emergency /
In order to indicate that it is a notification broadcast start notification mail, in the information area 69 of (I), a start notification parameter is prepared in a separate area from the mail content identifier 67, while the information of (II) In the area 70, the area of the mail content identifier 67 is also used for storing the start notification parameter. Specifically, the mail content identifier 67 in the information area 70 of (II)
Is used as the value of the mail content identifier 67 of the mail data corresponding to the start notification parameter, or a value indicating the start notification parameter of the emergency / notification information broadcast is added. .

Next, FIG. 9 shows an example of the format configuration of the time division frame of the related information 1.

The time-division frame has a time-division frame identification number 59 indicating that it is related information 1 relating to application data of an arbitrary specific program. Also, an information area 57 is stored. In this information area 59,
The identification information 56 is stored so that the related information 1 can identify the target program, and the scramble key information 58 for descrambling the application data of the program is stored. The program identification information 56 may be encrypted. For example, a fixed key, a master key,
Alternatively, the data may be encrypted by the transmitting device using a different work key or the like which has been distributed to the receiver in advance using a fixed key or a master key. Further, for example, the scramble key information 58 of the application data of the program for which the conditional access control is not performed may not be encrypted.

Next, FIG. 10 shows an example of the format configuration of a data stream 40 in which these time-division frames are time-division multiplexed by the multiplexer 38.

In FIG. 10, the time-division frame 51 indicates the time-division frame of the related information 1 relating to the video data of the channel 1, and corresponds to the time-division frame of the related information 1 in FIG. The time-division frame 53 also indicates the time-division frame of the related information 1 related to the audio data of the channel 1, and corresponds to the time-division frame of the related information 1 in FIG. Further, the time division frames of reference numerals 48 and 50 indicate the time division frames of the related information 2. In particular, the time-division frame of reference numeral 48 is a time-division frame of related information 2 with a receiver ID assigned to Mr. P, and the time-division frame of reference numeral 50 is associated information with a receiver ID addressed to another specific subscriber. 2 is a time division frame. Each of the time division frames denoted by reference numerals 48 and 50 corresponds to the time division frame of the related information 2 in FIG. The time-division frame denoted by reference numeral 49 indicates a time-division frame of the application data. For convenience, in FIG.
The video data of channel 2 is shown. This code 49
5 correspond to the time-division frames of the application data in FIG. Further, the time-division frames 47 and 52 indicate the time-division frames of the related information 2 for distributing the start notification of the emergency / notification broadcast. In particular, the time-division frame 47 is a time-division frame of the related information 2 to which the receiver ID is assigned to Mr. P, and the related information 2 for distributing the start notification mail to Mr. P
Is a time division frame. The time division frame denoted by reference numeral 47 corresponds to the time division frame of the related information 2 in FIG. On the other hand, the time-division frame 52 is a time-division frame of the related information 2 with the receiver ID attached to the other specific subscribers, and is the related information 2 for distributing only the start notification of the emergency / announcement broadcast. This is a time division frame. That is, the time-division frame denoted by reference numeral 52 corresponds to the time-division frame of the related information 2 in FIG.

As described above, the data stream has a configuration in which the application data and the time-division frames of the related information 1 and the related information 2 are all multiplexed. Further, the data stream is transmitted by the transmitter section 60 in a form suitable for the transmission medium. The receiving device 7 also receives the data stream 39 in a form suitable for the transmission medium, and from this, restores the data stream in FIG. 10 and performs processing.

When transmitting the time-division frame of the related information 2 for notifying the start of the emergency / notification broadcast, the transmission device 5 transmits the predetermined program channel or a mail message for notifying the start of the emergency / notification broadcast. Emergency / announcement broadcast is performed on the notified program channel. The emergency / announcement broadcast is performed in the same manner as the broadcast of application data of a normal program. However, the broadcast reception without scrambling or the transmission of the related information 1 in a time-division frame without encrypting the scramble key may be performed so that the conditional access control is not performed.

Next, the details of the receiving device 7 will be described.

FIG. 11 shows the configuration of the receiving device 7.

As shown, the receiving device 7 is a receiver 91
And a removable security module 92 such as an IC card. A display device 2000 such as a television device is connected to the receiver 91. The demodulator 18 is provided in the transmission system 600 of FIG.
However, in this embodiment, it is incorporated in the receiver 91.

The security module 92 communicates with the receiver 91 via the communication interface 87. This security module 92 is an IC card (ISO / IEC7816)
In this case, the communication interface 87 only needs to perform T = 0 and T = 1 communication. The security module interface processing unit 86 controls communication with the security module 92 in the receiver 91. The security module interface processing unit 86 performs a process corresponding to the communication interface 87.

In the receiving apparatus 7, the receiver separates the related information 1 and the related information 2, and the security module 92 processes the related information 1 and the related information 2 to extract the scramble key, and The start notification of the notification broadcast is detected and notified to the receiver 91. The receiver 91 performs descrambling of the application data and notification of the start of the emergency / notification information.

Hereinafter, the operation will be described in detail.

First, as a preparation, different recipient IDs are provided for the security module 92 and are different for each recipient.
(For example, the recipient of Mr. P) to the communication interface 87
Then, the information is read out from the memory management unit 15 in the security module 92 via the security module interface processing unit 86 and set in the information destination separation unit 9 in the receiver 91. That is, this is the path 89.

Further, the time division frame identification number of the related information 2 is set in the separating unit 11, and the separating unit 11 converts the related information 2 from the data stream 17 in which the demodulator 18 demodulates the signal received from the transmitting device 5. It is set so that time-division frames are separated. Further, when the program is selected, the time-division frame identification number of the related information 1 of the application data of the selected program is set in the same manner as the related information 2.
The setting is made in the separating unit 11 so that the time-division frame of the target related information 1 is separated from the data stream 17.

When the separation unit 11 separates the time-division frame of the related information 2 in the receiver 91, the separation unit 11 transfers this to the information destination separation unit 9 via the signal line 20. All the related information 2 separated by the separation unit 11 is transferred to the information destination separation unit 9. Upon receiving the information, the information destination separating unit 9 sets the receiver ID value and the receiver ID of the related information 2.
Check with the value of the area. If they match, the information destination separating unit 9 passes the related information 2 to the security module 92 via the communication interface 87 via the security module interface processing unit 86 (path 90). On the other hand, if they do not match, the information destination separating unit 9 discards (ignores) the related information 2 received from the separating unit 11. That is, the related information 2 received by the information destination separating unit 9
If the destination corresponds to the recipient ID of the recipient, the destination separating section 9 transfers the related information 2 to the security module 92, and the related information 2 processing section 12 in the security module 92 receives the related information 2.

Here, FIG. 12 shows a data structure of the related information 2 which is separated by the information destination separating section 9 and passed to the related information 2 processing section 12 by the information destination separating section 9.

In FIG. 12, data (a) corresponds to a part of the data area after the receiver ID 61 in the information area 63 of FIG. That is, the receiving device such as the receiver ID 61 and the security information 62 in the information area 63 of FIG.
All the information necessary for the (subscriber) is as shown in FIG. 12A, and the information destination separating unit 9 transfers the information to the related information 2 processing unit 12.

Similarly, the data (b) in FIG. 12 corresponds to a part of the data area after the receiver ID 61 in the information area 65 in FIG. That is, the receiver ID 61 in the information area 65 of FIG. 7, the emergency / notification broadcast start notification parameter 6
4. All information necessary for the receiving device (subscriber) such as the security information 62 is data (b) in FIG. 12, and the information destination separating unit 9 passes it to the related information 2 processing unit 12.

Data (c) in FIG. 12 corresponds to a part of the data area after the receiver ID 61 in the information area 69 in FIG. 8 (I). Therefore, the receiver ID 61 in the information area 69 of FIG. 8 (I), the emergency / notification broadcast start notification parameter 64,
All the information necessary for the receiving device (subscriber) such as the mail content identifier 67 and the emergency / notification broadcast start notification mail data 68 are data (c) in FIG. 12, which are separated by the information destination separating unit 9 into the related information 2 processing unit. Hand over to 12.

The data (c ′) in FIG. 12 corresponds to a part of the data area after the receiver ID 61 in the information area 70 in FIG. 8 (II). 8 (II), the receiver ID 61, the mail content identifier 67 (as described above, the emergency / notification broadcast start notification parameter is stored in this area), the emergency / notification broadcast start notification mail data All information required for the receiving device (subscriber) such as 68 is the data shown in FIG.
(c ′), which is passed by the information destination separating unit 9 to the related information 2 processing unit 12.

In the related information 2 processing unit 12 of the security module 92 that has received the data (a), (b), (c), and (c ′) of FIG.
The value of the recipient ID managed in 5 is taken out, and this value is compared with the value of the recipient ID 61 in FIGS. 12 (a) (b) (c) (c ') to find a match. For example, the related information 2 processing unit 12 extracts the unique key (Kp, unique key of a different receiver for each receiver) stored in the memory management unit 15 via the same path 25. On the other hand, if there is no match, the received FIG.
The data of (a), (b), (c), and (c ') of No. 2 are discarded (ignored).

When the related information 2 processing unit 12 reads out the unique key (Pr.'S unique key) in the memory management unit 15 via the path 25, the processing unit 12 reads the unique key and the information area shown in FIG. 73, the decryption processing unit 1
Hand over to 3. Here, it is assumed that the security information 62 in the information area 73 and the information area 71 in FIG. 12 is encrypted with the unique key, and the information area 72 and the information area 74 do not include any encrypted data. Shall be. For this reason, in the processing of the related information 2 processing unit 12, only the unique key read by the related information 2 processing unit 12 and the data of the same information area 73, 71 are transferred to the decryption processing unit 13, and the information area 72,
The start notification parameter, the mail identifier, and the mail data in the information area 74 are extracted by themselves. However, when the data in the information area 72 and the information area 74 in FIG. 12 is also encrypted, the processing unit 12 passes the key for decrypting the encryption and the information area to the decryption processing unit 13.

In the decryption processing unit 13, the related information 2 processing unit 1
2, the information area 73 or the information area 71 received from the processing unit 12 is decrypted using a predetermined decryption algorithm.

When the information area 73 in FIG. 12A is decrypted, the decryption processing unit 13 stores the security information 62 in the area 73 in the memory management unit 15 via the path 26. As described above, the security information 62 is, for example, contracted program identification information and its work key Kw. On the other hand, when the information area 71 in FIG. 12B is decrypted, the decryption processing unit 13 transmits the security information 62 in the area 71 to the memory management unit 15 via the path 26, similarly to the information area 73. Store. The security information 62 is, similarly to the information area 73, the program identification information contracted by the receiver and the work key Kw as described above. Further, in the case of this information area 71, the decryption processing unit 1
3 notifies the related information 2 processing unit 12 of the start notification instruction via the path 23 according to the instruction of the emergency / notification broadcast start notification parameter 64, unlike the information area 73.

Note that, as described above, the information area 72 and the information area 74 shown in FIG. 12 do not contain any encrypted data. However, when these areas are also encrypted, the same decryption is performed. The decryption processing is performed by the processing unit 13, which is shown in FIG.
In the case where the information area 72 of (c) is decoded, similarly to the information area 71, the start notification parameter is transmitted to the relevant information 2 via the path 23 according to the instruction of the emergency / notification broadcast start notification parameter 64 in the area 72. Notify the processing unit 12. Further, in the case of the same information area 72, the decryption processing unit 13 sets the start notification parameter and the mail content identifier in the mail data 68.
Both are transferred to the related information 2 processing unit 12 via the path 23. Also, the information area 74 of FIG.
When the decryption process is performed by the third information processing unit 3, the mail content identifier 64 and the mail data 68 are transferred to the related information 2 processing unit 12 via the path 23. Conversely, if the detection result is not the start notification parameter of the emergency / announcement broadcast, the decoding processing unit 13
Only the mail identifier and mail data 68 in route 4 are routed 23
To the related information 2 processing unit 12 via

Through the above-described processing, the start notification parameter, the mail identifier, and the related information 2 from which the mail data was obtained
The processing unit 12 notifies the receiver 7 while communicating with the receiver 91 via the communication interface 87.

In order to notify the receiver 7 of such a start notification instruction, its start notification mail data, and normal mail data, the related information 2 processing unit 12 transmits the start notification mail data to the receiver 91 via the communication interface 87. FIG. 13 shows the contents of the message to be transmitted.

In FIG. 13, data (a) indicates that the security module 92 has received the related information 2 from the receiver 91 and the related information 2 processing unit 12 in the security module 92 has correctly processed the related information 2. This is an example of data in the case where the module 92 returns a response to the receiver 91 via the security module interface processing unit 86 via the communication interface 87. This is because when the security module 92 receives the data (a) in FIG.
After correctly processing the data (a) in FIG. 12 together with the decryption processing unit 13, the module 92 returns to the receiver 91 via the security module interface processing unit 86 in the communication interface 87. For example, reception data 7 indicating that the data has been correctly received
Reply only 5

The data (b) in FIG. 13 indicates that the security module 92 receives the related information 2 from the receiver 91,
Related information 2 processing unit 12 in security module 92
Is an example of data when the related information 2 is correctly processed and the module 92 notifies the receiver 91 via the communication interface 87 of the emergency / notification broadcast via the security module interface processing unit 86. This is because the security module 92 receives the data (b) in FIG. 12 and the related information 2 processing unit 12 in the module 92 correctly processes the data (b) in FIG. When the emergency notification message start notification parameter 64 is detected, the module 92 instructs the receiver 91 via the communication module 87 via the security module interface processing unit 86 to start notification of the emergency / notification broadcast. For example, as shown in FIG. 13B, only the reception and start notification instruction data 76 is returned. The data (a) of FIG. 13, that is, the received data 75 and the data of FIG.
(b) That is, for example, the value to be stored (the security module 92 sends back to the receiver 91) differs from the reception and start notification instruction data 76 only.

The data (c) and (c ′) shown in FIG. 13 indicate that the security module 92 receives the related information 2 from the receiver 91 and the related information 2 processing unit 12 in the security module 92 correctly reads the related information 2. Processing, module 9
2 is a communication interface 87 to the receiver 91 via the security module interface processing unit 86 for emergency /
It is an example of a data configuration when a start notification of an announcement broadcast and mail data of the start notification text are transferred.

The data (c) in FIG. 13 is the same as the data (c) in FIG.
Is received by the security module 92, the related information 2 processing unit 12 in the module 92 correctly processes the data (c) in FIG. 12 and detects the mail content identifier 67 in FIG. The related information 2 processing unit 12 recognizes that the mail data 68 is stored in the
When it is recognized that the mail data 68 is urgent / announcement broadcast start notification mail data by detecting the emergency / announcement broadcast start notification parameter 64, the communication interface 87 transmits the emergency / announcement broadcast start notification mail data via the security module interface processing unit 86. The module 92 instructs the receiver 91 of the start notification and the start notification mail data. In the data (c) of FIG. 13, the mail content identifier 67 corresponds to the mail content identifier 67 of the data (c) of FIG. 12, and the mail data 68 corresponds to the mail data 68 of the data (c) of FIG. The reception and start notification data 80 in FIG. 13C corresponds to the reception and start notification data 76 in FIG. 13B.

In this case, receiving the data (c) in FIG. 13, the receiver 91 can know the content of the mail data 68 from the mail content identifier 67 in FIG. 13 (c). Further receiver 9
1 is the reception and start notification instruction data 80 shown in FIG.
Thus, the user can know that the mail data 68 is the emergency notification mail start notification mail data.

On the other hand, the data (c ′) in FIG. 13 is received by the security module 92 from the data (c ′) in FIG. 12, and the related information 2 processing unit 12 in the module 92 processes the data (c ′) correctly. By detecting the mail content identifier 67 in FIG. 12 (c ′), it is recognized that the mail data 68 is stored in the related information 2, and the related information 2 processing unit 12
If it is recognized that the mail data 68 is the start notification mail data by detecting that the value of the mail content identifier 67 of 2 (c ′) is the start notification parameter value of the emergency / notification broadcast, the communication is started. In the interface 87, the module 92 instructs the receiver 91 via the security module interface processing unit 86 to the start notification and the start notification mail data.

In the data (c ′) of FIG. 13, the mail content identifier 67 corresponds to the mail content identifier 67 of the data (c ′) in FIG. 12, and the mail data 68 is the mail data identifier of the data (c ′) in FIG. 68. The value of the mail content identifier 67 in FIG. 13C is the value of the emergency / notification broadcast start notification parameter recognized from the value of the mail content identifier. The reception data 77 in FIG. 13 (c ′) corresponds to the reception data 75 in FIG. 13 (a). That is, the received data 7
Numeral 7 indicates to the receiver 91 that the security module 92 has correctly received and processed the information area 72 of FIG. 12 (c ′) as in the case of the data (a) of FIG.

In this case, the receiver 91 receives the data (c ′) in FIG. 13 and receives the mail content identifier 67 in FIG. 13 (c ′).
Can know the contents of the mail data 68. Further, the receiver 91 detects that the value of the mail content identifier 67 in FIG. 13 (c ′) is a value indicating the start instruction parameter of the emergency / notification broadcast, and thereby the mail data 68 You can know that it is the start notification mail data.

Here, the ordinary mail data is stored in the related information 2
When the processing unit 12 obtains the message, the same message as that shown in FIG. 13C is used. However, the mail content identifier in this case is not the value of the start notification parameter.

In FIG. 11, the output processing unit 16 in the receiver 91 that has received the data from the security module 92 performs an output process according to the content of the data. That is, when the data of FIGS. 13 (b), (c), and (c ′) including the value indicating the start notification parameter is received,
An output process for notifying the start of the notification broadcast is performed, and when a mail identifier and mail data that do not indicate the start notification parameter are received, a mail output process is performed.

A specific example of the output processing will be described later.

The processing of the related information 2 has been described above.

Hereinafter, the processing of the related information 1 and the application data will be described.

In FIG. 11, when the user performs a channel selection operation as described above and the separation unit 11 separates the time-division frame of the related information 1 at the receiver 91, the signal line 84 passes through the security module interface processing unit 86 via the security module interface processing unit 86. This is transferred to the security module 92 by the communication interface 87.

FIG. 12D shows an example of the data structure of the related information 1 passed to the security module 92. Information necessary for the receiving apparatus (viewing a selected program) such as the program identification information 56 and the scramble key information 58 in FIG.
2 is data (d), which is separated by the separation unit 11 into the related information 1
Transfer to the processing unit 14.

In the security module 92 receiving the data (d) in FIG. 12, the related information 1 processing unit 14
First, the data area of the program identification information 56 of the data (d) in FIG. 12 is extracted. Next, the extracted program identification information 56
Is searched to determine whether the target program data corresponding to. Here, the target program data is, for example, extracted program identification information. Therefore, the search to be performed here means that the related information 1 processing unit 14 searches whether the extracted program identification information is already stored and managed in the memory management unit 15 via the path 27.

As a result, if the storage management is performed, the management program 15 and the target program data in the management module 15 are also stored.
Key information stored and managed within (for example, work key Kw)
The related information 1 processing unit 14 reads out the information via the path 27.
Conversely, if not stored, the related information 1 processing unit 14 discards (ignores) the data (d) of FIG.

As a result of the search, when the related information 1 processing unit 14 reads the key information in the memory management unit 15,
Is the read key information and the received data of FIG.
(d) is transferred to the decryption processing unit 13 via the path 24.

In the decoding processing unit 13, the related information 1 processing unit 1
12 is decrypted in accordance with a predetermined decryption algorithm using the key information received from the data processing unit 14 in FIG. The result of the decryption processing is passed by the decryption processing unit 13 to the descrambler 10 of the receiver 91 via the communication interface. Here, the result of the decryption processing is the scramble key information 58 in the data (d) in FIG. 12, and the decryption processing unit 13 receives the decrypted scramble key information 58 to the descrambler 10. hand over.

When the program identification information 56 of FIG. 8 is encrypted, the program identification information 56 in the data (d) of FIG. 12 received by the related information 1 processing unit 14 is encrypted. As described above in the device, for example, the related information 1 processing unit 14 reads out the fixed key, master key, or work key separately prepared in advance from the network from the memory management unit 15 via the path 27, and reads the read key and its key. The encrypted data (program identification information 56) is first passed to the decryption processing unit 13. In response, the decryption processing unit 13 performs decryption processing,
The result is passed to the related information 1 processing unit 14. Thereafter, similar to the above-described processing of the related information 1 processing unit 14, the same processing unit 14
Searches for the program identification information 56 in the data stored in the memory management unit 15 and stores the corresponding key of the program identification information 56 in the management unit 15.
And passes the key and the data (d) of FIG. 12 to the decryption processing unit 13, and the processing unit 13 performs the decryption processing, thereby performing the decryption processing unit 13.
Passes the scramble key information 58 to the descrambler 10.

In the descrambler 10 of the receiver 91,
Using the received scramble key information 58, the user scrambles the application data of the program selected by the user in the time-division frame and outputs the scrambled data to the display device 2000.

FIG. 14 shows the contents of the memory management unit 15 used in the above processing.

The memory management unit 15 shown in FIG. 11 stores a receiver ID 81 (Mr. P's receiver ID) for identifying each subscriber and a receiver's unique key 82 (Mr. P's unique key) for each subscriber. And the right brain is pre-formed. The program identification information 83 and the work key information 83 corresponding thereto are stored in the related information 2 described above.
Will be stored. FIG. 14 shows that information on programs a and c is distributed and stored as contract information (security information) as program viewing conditions contracted by Mr. P. That is, the data of the program identification information a83 and its work key information Kwa83, and the data of the program identification information b83 and its work key information Kwb83 distributed to Mr. P in the time-division frame of the relevant information are stored by the processing of the above-described relevant information 2. ing.

The contract expiration date 83 and the encryption algorithm initial setting data 83 are also delivered to Mr. P as security information of the related information 2 in FIG. 6 or FIG. It is stored data and is security information necessary for the operation of a network used for measures against pirate such as a reception prohibition instruction, encryption algorithm data, and falsification. In general, if a network is operated, other key information and security information are also necessary, but in FIG. Note that such information can also be distributed as security information.

Hereinafter, the output processing performed by the output processing unit 16 in the receiver 91 will be described.

FIG. 15 shows an example of the output process.

FIG. 15 shows the appearance of the receiver 91, the security module 92, and the display device 2000.

By the way, in the output process, when the data of FIG. 13 (b) (c) (c ′) including the value indicating the start notification parameter is received, the output process for notifying the start of the emergency / notification broadcast is as follows. As the output process, the start / stop LED 95 for the emergency / notification broadcast corresponding to the output unit 13 in FIG. FIG. 1 also includes a value indicating a start notification parameter.
When the data of 3 (b) (c) (c ') is received, a buzzer 98 corresponding to the output unit 13 of FIG. 11 is sounded as output processing for notifying the start of emergency / notification broadcast. When the data of FIG. 13 (b) (c) (c ′) including the value indicating the start notification parameter is received, the MIX processing unit 1002 of FIG. , A buzzer sound is displayed from the speaker 99 of the display device 2000. Further, when the data of FIG. 13 (c) (c ′) including the value indicating the start notification parameter is received, as the output processing for notifying the start of the emergency / notification broadcast, via the MIX processing unit 1002 of FIG. In the upper part of the display screen of the display device 2000, a flashing display 96 of the reception of the emergency notification mail is performed. In addition, when data of a mail identifier and mail data that do not indicate the start notification parameter is received, the process shown in FIG.
By performing a blinking display 97 of the mail reception at the bottom of the display screen of the display device 2000 via the MIX processing unit 1002, the user is notified of the mail reception separately from the mail reception of the emergency / notification broadcast start notification. Also, in the case of the flashing display 96 of the emergency notification mail reception, the flashing display 9 of the mail reception
Also in the case of 7, when the user instructs to display the mail thereafter, the output processing unit 16 displays the mail data on the display screen via the MIX processing unit 1002.

These output processes may be used in combination as appropriate.

Here, the start notification LED 95 is provided, for example, in front of the receiver 91 as shown in FIG. 15, and notifies the user of the start of the emergency / notification broadcast by lighting or blinking. Providing the start notification LED 95 on the front in this way allows the user to be notified of the start of the emergency / notification broadcast even if the display device 2000 is in the power OFF state in FIG. 15, for example.

Similarly, by providing the buzzer 98 in the receiver 91, the user can be notified of the start of the emergency / notification broadcast even when the display device 2000 is in the power-off state.

Thus, even if the receiving device 7 and the display device 2000 are far apart and the user is watching the program, the user can be notified of the start of the emergency / notification broadcast. .

Here, the emergency /
The output of the notification broadcast start notification to the user is, for example, an IPPV (Impulse P
ay Per View) service, that is, a service in which the user pays the program viewing fee only for the amount of time the user has watched, gives the user the discomfort that the incoming mail display suddenly appears on the video of the purchased program. Although it rolls,
As described above, a plurality of values of the start instruction parameter of the emergency / announcement broadcast distributed in the related information 2 are prepared, and the output processing unit 16 determines which output If the switching is performed, for example, the transmitting side (service operator) selects and distributes the parameter value according to the urgency of the emergency / announcement broadcast, thereby giving the user uncomfortable feeling every time. can avoid.
That is, as described above, by preparing a plurality of values of the start instruction parameters of the emergency / announcement broadcast distributed in the related information 2 in advance, the emergency / announcement broadcast start notification as shown in FIG. The output side to the user can be controlled from the transmission side.

Hereinafter, a second embodiment of the present invention will be described.

The second embodiment is different from the first embodiment in that an emergency / announcement broadcast having a high degree of urgency is prepared to be performed in the future and all network subscribers must be notified of the start of the broadcast. Considering that it is necessary to transmit a time-division frame of the related information 2 including the receiver ID of the transmission destination and the start notification parameter for each transmission destination.

Here, sending the related information 2 individually to each receiver means that, in the first embodiment, for example, if there are 5,000 receivers, a time-division frame of at least 5,000 related information 2 is transmitted. In the case of a large-scale digital network, such as the device 5 having to transmit data, not only is it a significant obstacle to operating services in terms of effective use of transmission medium resources, but also there is a possibility that prompt start notification cannot be performed. Occurs.

In the second embodiment, in order to solve such a problem, apart from a different recipient ID for each recipient,
First, a network standard value fixedly specified in the network and common to all receivers and group information assigned to each receiver group are prepared in the network.
In addition to the one receiver ID value (for example, the receiver ID value of Mr. P), a network specified value and group information of a group to which the receiver of the receiver 7 belongs are given.

When the transmitting device 5 sends the related information 2 to one receiver, the receiver 5
When transmitting the time-division frame of the related information 2 with the ID and sending the related information 2 to all the recipients, the time division without including the group information in the related information 2 with the network default value as the receiver ID When transmitting a frame and sending related information 2 only to a certain group of recipients, a network-specific value is added as a recipient ID, and a time-division frame of related information 2 including group information of the group is transmitted. .

On the other hand, in the receiving device 7, in addition to the related information 2 with the unique receiver ID of the receiver using the receiving device 7, a network specified value is added as the receiver ID and the group information is not included. The related information 2 and the related information 2 including the group information of the group to which the receiver of the receiver 7 belongs with the network specified value as the receiver ID are combined with the receiver 7 in the first embodiment.
The processing is performed in the same manner as the processing of the related information 2 to which the receiver ID unique to the receiver using the information is attached.

Then, it is processed as described above as the related information 2 addressed to itself.

Thus, the problem that at least 5,000 subscribers need to distribute the related information 2 of the start notification to 5,000 subscribers can be solved.

The details will be described below.

First, FIG. 16 shows information stored in the memory management unit 15 of the security module 92 of the receiving device 7 in this case.

As shown in the figure, in this case, in addition to the information in the first embodiment shown in FIG. 14, the network management value and the group of the receiver Information is stored. These pieces of information may be stored in the security module in advance, or a receiver unique to the receiver of the receiver 7.
By transmitting the related information 2 with the ID as security information from the transmitting device 5 and transmitting the related information 2 to the receiving device 7 shown in the first embodiment, the information is stored in the memory management unit 15. You may.

Next, FIGS. 17 and 18 show examples of the format of the time-division frame of the related information 2 for notifying all the recipients or the group of the recipients of the start of the emergency / notification information.

FIG. 17 corresponds to the time-division frame of the related information 2 shown in FIG. 7 previously. The difference is that the network specified value 100 is stored in the area of the receiver ID 61 in FIG. And the information area 101 including the group information 3000. However, the group information 30
00 indicates that only the specific recipient group is notified of the start of the emergency / notification information, and the group information of that recipient group is included.

Next, FIG. 18 corresponds to the time-division frame of the related information 2 in FIG. 8 described above, and the difference is in the area of the receiver ID 61 in FIG. And the information areas 102, 1
03 in that group information 3000 is included. However, the group information 3000 includes the group information of the specific receiver group only when notifying the start of the emergency / notification information only to the specific receiver group.

Now, the receiver device 7 according to the second embodiment is described.
Then, in addition to the recipient ID value of the user, the network specified value is read from the memory management unit 15 in advance and set in the information destination separating unit 9 in the information destination separating unit 9.

In this state, when the separating unit 11 transfers the related information 2 to the information destination separating unit 9 via the path 20, the information destination separating unit 9 sets the value of the receiver ID 61 area of the related information 2 to the user ID. Only when the receiver ID value is the receiver ID value or when the value of the receiver ID 61 area of the related information 2 is the network specified value, the receiver I
The related information 2 in the portion after the D61 area is transferred to the related information 2 processing unit 12 in the security module 92 via the security module interface processing unit 86 via the communication interface 87.

FIG. 19 shows an example of the data structure of the data of the related information 2 separated by the information destination separating unit 9 and transferred to the related information 2 processing unit 12 of the security module 92.

As described above, the data of the related information 2 originally separated by the information destination separating unit 9 and passed to the related information 2 processing unit 12 is, as described above, the receiver ID value of the user (for example, the receiver ID value of Mr. P). ) Or the data of the related information 2 distributed by the network specified value. FIG. 19 shows only the data example of the related information 2 separated by the network specified value. Examples of the data configuration of the related information 2 separated by the recipient ID value of the user in the information destination separation unit 9 are shown in FIGS.
(c) It becomes the same as the data of (c ').

Data (a) in FIG. 19 corresponds to information area 1 in FIG.
01 corresponds to a part of the data area after the recipient ID 61 area (as described above, this area stores the network specified value 100). Therefore, the network specified value 100, the group information 3000, the emergency / announcement broadcast start notification parameter 6 in the information area 101 in FIG.
All information required for the receiving device (subscriber) such as No. 4
Data (a). This is transferred to the related information 2 processing unit 12 by the information destination separation unit 9.

The data (b) in FIG. 19 is also the data area in the information area 102 of FIG. 18 (I) following the receiver ID 61 area (the network area 100 is stored in this area as described above). Equivalent to part. Therefore, information required for the receiving device (subscriber) such as the network defined value 100, group information 3000, emergency / announcement broadcast start notification parameter 64, mail content identifier 67, and mail data 68 in the information area 102 of FIG. Are all data (a) in FIG. 19, which is
Delivered to the processing unit 12.

The data (c) in FIG. 19 is also the data area in the information area 103 of FIG. 18 (II) following the receiver ID 61 area (the network area 100 is stored in this area as described above). Equivalent to part. Therefore, FIG. 18 (II)
Network specified value 100 in the information area 103 of
Necessary for the receiving device (subscriber) such as group information 3000, mail content identifier 67 (as described above, an emergency / notification broadcast start notification parameter value is stored in this area), and emergency / notification broadcast start notification mail data 68. All information is in Figure 1
9 (c), which is passed to the related information 2 processing unit 12 by the information destination separating unit 9.

The related information 2 processing unit 12 which has received the data (a), (b), and (c) in FIG. Group information is set. When the network specified value is detected, the presence or absence of group information is checked next. If the group information is not included, similar to the related information 2 with its own receiver ID (similar to the first embodiment), The related information 2 is processed. On the other hand, if the group information is included, it is checked whether or not it matches the set group information.
This related information 2 is processed in the same manner as the related information 2 with the ID (similar to the first embodiment). If the group information included in the related information 2 does not match the group information read and set from the memory management unit 5, the related information 2 is discarded.

[0149] As described above, the related information 2 having the network specified value as the receiver ID and not including the group information is provided.
And the associated information 2 including the group information of the group to which the receiver of the receiving device 7 belongs with the network specified value as the receiver ID.
D is processed in the same manner as the related information 2 to which D is attached.
The data No. 3 is delivered to the output processing unit 16 of the receiver 91, and an output for notifying the start of the broadcast of the emergency / notification information is made as shown in FIG.

In the second embodiment, the start of emergency / notification information is notified only to a specific group by setting a different network specified value for each group of recipients without using group information. You may do so. This is, for example, from the transmitting device to each receiving device,
By distributing the network specified value set for the group to which the receiving device belongs as security information,
Network specified value memory management unit 1 corresponding to group
5 and the transmitting apparatus transmits the related information 2 including the notification of the start of the emergency / announcement broadcast, with the receiver ID of the related information 2 being the network specified value set for the group to be notified. Can be realized by:

Hereinafter, a third embodiment of the present invention will be described.

The third embodiment is different from the first and second embodiments in that the display device 7 is constituted by the display device 91 and the security module 92. The function of the security module 92 is changed to the display device 91. It is configured as a single display device 7 by being provided therein.

FIG. 20 shows a configuration of a display device 7 according to the second embodiment.

As shown, the display device 7 is connected to a display device 91.
Since the security module 92 and the security module 92 are integrated, the security module interface processing unit shown in FIG. 11 is not required. Other configurations and operations
This is the same as the first embodiment and the second embodiment.

Hereinafter, a fourth embodiment will be described.

In the fourth embodiment, the receiver 91 according to the first or second embodiment is configured as an expansion card mounted in an expansion slot of a computer.

FIG. 21 shows a configuration of a computer equipped with the receiver 91 according to the present embodiment.

As shown in the figure, the computer according to the present embodiment has a CPU 4000 and a CPU connected to a main memory 4001.
It has a bus 4010, an external storage device 4003 connected to an expansion bus 4020 connected to the CPU bus 4010 via a bus bridge circuit 4002, a display device 4005, and the like. The expansion slot 4 connected to the expansion bus 4020
004 has a receiver 91 attached thereto. The receiver 91 attached to the expansion slot 4004 operates according to the instruction of the CPU 4000, and the video and audio output from the receiver 91 to the expansion bus 4020 are sent to the display device 4005 and output. The signal transmitted from the transmitting device 5 is transmitted to the antenna 410
0 directly to the receiving device 7. The security module 92 is detachably attached to the receiver 91.

However, the security module 92
It may be configured to be mounted on an IC card driver or the like mounted on another expansion slot or the like connected to the expansion bus 4020. In this case, transmission and reception of data between the security module 92 and the receiver 91 are performed by the extension bus 4020,
This is performed via the CPU bus 4010 and the main memory 4001.

In the fourth embodiment, as in the third embodiment, the function of the security module may be incorporated in the receiver 91, and both may be integrated.

In the first embodiment, FIG.
The output module 16 and the output unit 1004 are provided on the security module 92 side.
At 92, the user may be notified of the start of the emergency / notification broadcast.

The embodiment of the present invention has been described above.

According to the above embodiments, in order to distribute the start notification of the emergency / notification broadcast to the receiver as the related information 2 for distributing the contract information such as the work key, the related information 2
The processing circuit for processing the start notification of the emergency / announcement broadcast can be processed, and the processing circuit for processing the time-division frame of the type newly allocated exclusively for the notification of the start of the related emergency / announcement information, etc. There is no need to provide

In the first embodiment, in particular, the processing relating to the related information 2 having different contents for each receiver is performed in the security module, and the receiver is provided with a standard and fixed processing which is not different for each receiver. It has only a processing function. For this reason, the circuit load on the receiver can be reduced and shared. For example, if the receiver has a function of controlling an LED display, a message display on a display device, and a buzzer output in response to a response from the security module, the security module is replaced with the one according to the first embodiment. By simply doing this, the start notification of the emergency / announcement broadcast using this receiver as it is becomes possible. In addition, the receiver according to the first embodiment, such a receiver that does not have a function of controlling the LED display, the message display on the display device, or the buzzer output in response to the response from the security module, Can be realized only by adding a function of performing the control of (1). As described above, FIG.
In the case where the output processing unit 16 and the output unit 1004 are provided on the security module 92 side, a function of controlling an LED display, a message display on a display device, and a buzzer output according to a response from the security module is provided. It is possible to notify the user of the start of the emergency / announcement broadcast by using the receiver which is not used as it is.

Further, the receiver according to the first embodiment can be shared as a receiver in a system that does not perform notification of emergency / notification information, and can exchange related information 1 and related information 2 simply by exchanging security modules. It can be used as a receiver in multiple systems with different formats and contents.

According to the second embodiment, the notification of the start of the emergency / announcement broadcast, which originally uses the related information 2 individually transmitted to each receiver, is delivered to the previous receiver at once. Or only to a specific group of recipients.

[0167]

As described above, according to the present invention, it is possible to broadcast emergency / notification information in a digital network without requiring a significant change in the receiver. Further, by using such a receiver, it is possible to realize the broadcast of emergency / notification information intended for a limited number of recipients. Also, broadcasting of emergency / announcement information intended for a limited number of recipients can be realized using a receiver that does not differ for each recipient.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a digital network according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating an operation of the transmission device according to the embodiment of the present invention.

FIG. 3 is a flowchart illustrating an operation of the receiving device according to the embodiment of the present invention.

FIG. 4 is a block diagram illustrating a configuration of a transmission device according to the embodiment of the present invention.

FIG. 5 is a diagram showing a format of a time division frame according to the first embodiment of the present invention.

FIG. 6 is a diagram showing a format of a time-division frame according to the first embodiment of the present invention.

FIG. 7 is a diagram illustrating a format of a time-division frame according to the first embodiment of the present invention.

FIG. 8 is a diagram showing a format of a time-division frame according to the first embodiment of the present invention.

FIG. 9 is a diagram showing a format of a time division frame according to the first embodiment of the present invention.

FIG. 10 is a diagram illustrating an example of a data stream according to the first embodiment of the present invention.

FIG. 11 is a block diagram illustrating a configuration of a receiving device according to the first embodiment of the present invention.

FIG. 12 is a diagram showing data transferred from the receiver to the security module in the first embodiment of the present invention.

FIG. 13 is a diagram showing data transferred from the security module to the receiver in the first embodiment of the present invention.

FIG. 14 is a diagram showing information stored in a memory management unit according to the first embodiment of the present invention.

FIG. 15 is a diagram showing an output process performed by an output processing unit according to the first embodiment of the present invention.

FIG. 16 is a diagram showing information stored in a memory management unit according to the second embodiment of the present invention.

FIG. 17 is a diagram illustrating a format of a time-division frame according to the second embodiment of the present invention.

FIG. 18 is a diagram showing a format of a time division frame according to the second embodiment of the present invention.

FIG. 19 is a diagram showing data transferred from the receiver to the security module in the second embodiment of the present invention.

FIG. 20 is a block diagram illustrating a configuration of a receiving device according to a third embodiment of the present invention.

FIG. 21 is a block diagram illustrating a configuration of a receiving device according to a fourth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Multiplexing apparatus, 2 ... Control information preparation part, 3 ... Scrambler, 5 ... Transmission apparatus, 7 ... Receiving apparatus, 9 ... Information destination separation part, 10 ... Descrambler, 11 ... Separation part, 12 ... Related information 2 processing Unit, 13: decoding processing unit (decoding algorithm),
14 ... related information 1 processing unit, 15 ... memory management unit, 16 ...
Output processing unit, 18 demodulator, 29 video encoder, 3
0: voice encoder, 31: time division frame creation unit, 3
2 ... time-division frame creation section for related information 1, 33 ... time-division frame creation section for related information 2, 34 ... input device, 35 ...
Related information 2 creating section, 36 ... Related information 1 creating section, 37 ... Scrambler, 38 ... Multiplexer

Claims (10)

[Claims] An encryption key for broadcasting a first type frame including scrambled application data and encrypting key information for descrambling the application data in a second type frame in a transmitting apparatus. The broadcast including the information, the third type of frame, including the decryption information for decrypting the key information, transmitted to each receiving device, and transmitted to each receiving device at each receiving device. number 3
Receiving the type frame, using the decryption information included in the received third type frame, decrypting the key information from the encryption key information included in the received second type frame, the decrypted key information In a digital network using descrambling and using application data included in the first type of frame received by the transmitting device, the transmitting device includes a notification of starting broadcasting of emergency / notification information in the third type of frame, When the third type frame transmitted to the receiving device includes the notification of the start of the broadcast of the emergency / notification information, the receiving device transmits the emergency / notification information to the receiving device. A method of notifying the start of broadcast of emergency / notification information, which notifies a user of the start of broadcast of emergency / notification information. 2. The method according to claim 1, wherein the transmitting device transmits the emergency / notification information to a plurality of receiving devices associated in advance with a predetermined specified value. When performing the notification of the broadcast start, the transmission of the third type frame including the notification of the broadcast start of the emergency / notification information addressed to the receiving device that performs the notification, the third type having the specified value as the destination The frame is transmitted by including a broadcast start notification of emergency / notification information, and the receiver device previously associated with the specified value is a third type frame to which the specified value is assigned as a destination. The emergency / announcement information broadcast start is received as a third type frame transmitted to the receiving device. 3. The method for notifying the start of broadcast of emergency / notification information according to claim 2, wherein the plurality of receiving devices associated in advance with the prescribed value are all receiving devices belonging to the digital network. The transmitting apparatus, when notifying the start of broadcasting of emergency / notification information to a group of some of the receiving apparatuses,
The transmission of the third type frame including the notification of the broadcast start of the notification information to the receiving device that performs the notification is performed by using the destination including the identification information of the group that performs the notification and the notification of the start of the broadcast of the emergency / notification information. The transmission is performed by transmitting a third type of frame to which a predetermined specified value is attached.
When the three types of frames include the identification information of the group, only when the receiving device belongs to the group indicated by the identification information of the group, the third type of the specified value is added as the destination. A method for notifying the start of broadcast of emergency / notification information, characterized by receiving a frame as a third type frame transmitted to the receiving device. 4. A digital network including a transmitting device and a plurality of receiving devices, wherein the transmitting device broadcasts a first type frame including application data obtained by scrambling, and a second type frame. Means for broadcasting including encrypted key information obtained by encrypting key information for descrambling the application data; and a third type frame including decryption information for decrypting the key information. Means for transmitting to a receiving device, and a means for transmitting to the receiving device that performs the notification, including a notification of the start of broadcasting of emergency / notification information in the third type of frame, the receiving device includes: Means for receiving a third type of frame transmitted to the receiving device, and decryption information included in the received third type of frame, using encryption key information included in the received second type of frame. Means for decrypting the key information, means for descrambling the application data included in the first type frame received with the decrypted key information, and means for decrypting the third type frame transmitted to the receiving apparatus. Means for notifying the user of the receiver device of the start of broadcast of the emergency / notification information when the notification of the start of broadcast of the emergency / notification information is included. 5. A first type frame including scrambled application data and broadcasting, and a second type frame including encryption key information obtained by encrypting key information for descrambling the application data. Broadcast,
A receiving device of a digital network including a transmission system for transmitting to each receiving device, including decryption information for decrypting the key information, in a third type of frame, wherein the transmitting device is transmitted to the receiving device. Means for receiving a third type of frame, and means for decrypting the key information from the encryption key information included in the received second type of frame, using the decryption information included in the received third type of frame Means for descrambling the application data contained in the first type frame received with the decrypted key information, and starting the broadcast of the emergency / notification information in the third type frame received and transmitted to the receiving device. Means for notifying the user of the receiver device of the start of broadcast of emergency / notification information when the notification is included. 6. A first type frame including scrambled application data and broadcast, and a second type frame including encryption key information obtained by encrypting key information for descrambling the application data. Broadcast,
A receiving device of a digital network including a transmission system for transmitting to a respective receiving device, including a decryption information for decrypting the key information, in a third type of frame, comprising: a receiver; An auxiliary device detachably mounted, the receiver comprising: means for receiving a third type of frame transmitted to the receiving device; and a third type of frame transmitted to the receiving device. Means for transmitting the contents of the frame to the auxiliary device; and
Means for transmitting the contents of the seed frame to the auxiliary device;
The first received with the key information received from the module device
Means for descrambling the application data contained in the seed frame, and means for notifying the user of the receiver device of the start of broadcasting of emergency / notification information according to the notification instruction received from the auxiliary device, The auxiliary device uses the decryption information included in the content of the third type of frame received from the receiver to extract the key from the encryption key information included in the content of the second type of frame received from the receiver. Means for decrypting information, means for transmitting the decrypted key information to the receiver, and the start of broadcast of emergency / notification information on the contents of the third type of frame received from the receiver and transmitted to the receiver. Means for transmitting the notification instruction to the receiver when the notification is included. 7. A broadcast including a scrambled application data in a first type frame, and encryption key information obtained by encrypting key information for descrambling the application data in a second type frame. Broadcast,
An auxiliary device detachably attached to a receiver of a digital network including a transmission system for transmitting to each receiving device, including decoding information for decoding the key information in a third type of frame, Using the decryption information included in the content of the third type of frame received from the receiver, decrypting the key information from the encryption key information included in the content of the second type of frame received from the receiver Means, means for transmitting the decrypted key information to the receiver, and notification of the start of broadcast of the emergency / notification information is included in the content of the third type frame transmitted from the receiver to the receiver. Means for transmitting the notification instruction to the receiver in the case where the information processing apparatus is in a standby state. 8. A broadcast including a scrambled application data in a first type frame and encryption key information in which key information for descrambling the application data is encrypted in a second type frame. Broadcast,
An auxiliary device detachably attached to a receiver of a digital network including a transmission system for transmitting to each receiving device, including decoding information for decoding the key information in a third type of frame, Using the decryption information included in the content of the third type of frame received from the receiver, decrypting the key information from the encryption key information included in the content of the second type of frame received from the receiver Means, means for transmitting the decrypted key information to the receiver, and notification of the start of broadcast of the emergency / notification information is included in the content of the third type frame transmitted from the receiver to the receiver. Means for notifying the user of the receiver of the start of broadcasting of emergency / notification information when the user is in the auxiliary device. 9. A first type frame including scrambled application data and broadcast, and a second type frame including encryption key information obtained by encrypting key information for descrambling the application data. Broadcast,
The third type of frame, including the decryption information for decrypting the key information, to constitute a receiving device of a digital network including a transmission system that transmits to each receiving device,
A receiver to which an auxiliary device is detachably attached, the receiving unit receiving a third type of frame transmitted to the receiving device, and a receiving unit for receiving the third type of frame transmitted to the receiving device. Means for transmitting the content to the auxiliary device; and
Means for transmitting the contents of the seed frame to the auxiliary device;
The first received with the key information received from the module device
Means for descrambling the application data included in the type frame, and means for notifying the user of the receiver apparatus of the start of broadcasting of emergency / notification information according to the notification instruction received from the auxiliary apparatus. Features receiver. 10. The receiver according to claim 9, wherein the receiver is formed as a card-type device mounted on a computer.