JP2000350181A - Broadcast storage method and recording medium recording storage control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent concentration of a time band for a desired broadcast program and to collect the viewing charge by each contents generating agency by identifying the presence of a prescribed key code every time a plurality of scrambled contents data are received, descrambling the received contents data through the use of the key code when the key code is present, and storing the descrambled data. SOLUTION: A key code management section 24 of a broadcast station side unit 20 stores information denoting kinds of scrambling of all contents and information of key codes corresponding to the scramble in cross reference with each other. Then the key code management section 24 specifies contents received at present by a scramble processing section 23 on the basis of information of a distributor of contents and information of a product number received by a program management section 27 and gives the information of kinds of scramble corresponding to the specified contents to a scramble processing section 23. The scramble processing section 23 decides the kind of scramble according to this information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast storage method for storing broadcast contents such as audio and video in a television broadcast and a recording medium storing a storage control program.

[0002]

2. Description of the Related Art For example, in CS digital satellite broadcasting, various types of programs are simultaneously broadcast using a large number of channels. In the case of pay broadcasting, scramble processing is generally performed on broadcast data so that only a specific viewer who has contracted in advance can view the specific program. A specific viewer who has contracted can view the program by releasing the scramble using the distributed key code.

[0003] When watching this type of broadcast,
In general, a receiver receives a radio wave transmitted by a broadcasting station and immediately watches a program. For this reason, the broadcast needs to be transmitted at a time zone suitable for the viewer. For example, since it is meaningless to broadcast a program for children at night, the time zone for broadcasting a program for children is limited to daytime.

[0004]

As described above, the broadcast must be transmitted in a time zone suitable for the viewer. However, broadcast requests concentrate on a time zone called "golden hour" where there are many viewers. For this reason, especially when a plurality of content creators share one channel, the probability of being able to broadcast in a desired time zone is reduced.

[0005] Further, since the scramble processing of broadcast data is performed in units of channels, a viewer having a decoder capable of descrambling a specific channel can view all programs broadcast using the channel. Since the number of available channels is limited, it is necessary to assign the same channel to a plurality of content creators. By dividing the channel use time zone for each content creator, a plurality of content creators can share the same channel.

[0006] From the standpoint of providing pay-broadcast contents, it is desirable that a viewing fee can be collected independently for each content creator. However, at present, whether or not the viewer can view is determined only by whether or not the scramble can be canceled for each channel, so that it is impossible to collect a viewing fee independently for each content creator. According to the present invention, a broadcast storage method and a storage control program for preventing a desired time zone of broadcasting from being concentrated in a golden hour or the like and enabling a collection fee to be independently collected for each content creator are recorded. It is intended to provide a recording medium.

[0007]

According to a first aspect of the present invention, there is provided a broadcast storing method, wherein a broadcast transmitting apparatus uses a same channel by scrambling a plurality of encoded content data of different types from each other. The broadcast receiving device that sequentially transmits the broadcast data as broadcast data and receives the broadcast data receives the scrambled plurality of content data sequentially from the same channel, and each time the respective content data is received. Identifies whether or not a specific key code required for descrambling is present in the broadcast receiving side device. If the specific key code is present, the content received using the key code is identified. Unscramble the data and store the descrambled content data in a predetermined storage device, and the key code does not exist Characterized by omitting the accumulation of content data in case.

According to the first aspect of the present invention, since the broadcast receiving side device (viewer side device) stores the received content data in the storage device, even in an arbitrary time zone where the content data is not broadcasted. The viewer can reproduce and view the content data read from the storage device. For this reason, for example, even a program for children can be broadcast in the middle of the night, so that the time zone desired to be broadcast does not concentrate as in the golden hour.

[0009] Further, by applying different types of scrambling for each content, programs (contents) that can be viewed by a specific viewer and programs that cannot be viewed can be mixed in the same channel. Therefore, even when a plurality of content providers share one broadcast channel, each content provider can obtain a price for providing independent content.

Furthermore, since the descrambled content data is stored when a key code for descrambling is present, unnecessary content data that cannot be descrambled and cannot be viewed is not stored. The storage capacity of the device can be used effectively.

According to a second aspect of the present invention, in the broadcast storage method of the first aspect, the broadcast transmitting apparatus adds content identification information for distinguishing a plurality of content data to each content data as first content identification information. The broadcast receiving apparatus transmits the first content identification information added to the received content data and the content identification information associated with each key code existing in the broadcast receiving apparatus. The method is characterized in that it is compared with second content identification information to determine whether the specific key code exists.

As the content identification information, for example, information for identifying a distributor (producer), product number information, or the like may be used. By comparing the first content identification information included in the broadcast data with the second content identification information associated with each key code present on the broadcast receiving side, the content data being received using each key code It can be determined whether or not the scramble can be canceled.

According to a third aspect of the present invention, in the broadcast storing method in the broadcast receiving apparatus for receiving the broadcast data, the first step of sequentially receiving the scrambled encoded content data from the same channel is the same as the first step. A second step of identifying, for each content, the presence or absence of a key code required for descrambling each of the encoded content data received from the channel, and a key code required for descrambling exists. A third step of descrambling the encoded content data received using the key code, and, if the key code is present, storing the descrambled encoded content data in a predetermined storage device. And a fourth step of storing.

According to the third aspect, the coded content data included in the broadcast data is received in the first step. Whether or not there is a key code necessary for descrambling the encoded content data is identified for each content in the second step. If there is a key code, it is used to descramble it in a third step. If the key code exists, the descrambled encoded content data is stored in the fourth step.

Therefore, similarly to the first aspect, the viewer can reproduce and view the content data read from the storage device even in an arbitrary time zone in which the content data is not broadcast. In addition, since the descrambled content data is stored when a key code for descrambling is present, unnecessary content data that cannot be descrambled and cannot be viewed is not stored, and the storage device stores the content data. Effective use of capacity.

According to a fourth aspect of the present invention, in the broadcast storing method of the third aspect, in the second step, the content identification information for distinguishing each encoded content data is stored in the first step.
From the broadcast data received as the content identification information, and obtains, as the second content identification information, the content identification information associated with each key code present in the broadcast receiving side device, and obtains the first content identification information and , And comparing the second content identification information with the second content identification information to determine whether the key code exists.

As the content identification information, for example, information for identifying a distributor (producer), product number information, or the like may be used. By comparing the first content identification information included in the broadcast data with the second content identification information associated with each key code present on the broadcast receiving side, the content data being received using each key code It can be determined whether or not the scramble can be canceled.

According to a fifth aspect of the present invention, in the broadcast storage method of the third aspect, a fifth step of identifying whether or not there is information indicating a storage request for each of the encoded content data received from the same channel. And storing only the encoded content data for which there is information indicating a storage request, the descrambled encoded content data in the fourth step.

According to the fifth aspect, a program which the viewer wants to view from programs scheduled to be broadcast in advance is distinguished from unnecessary programs.
By registering information indicating a storage request for a program to be viewed, encoded content data can be accumulated only for a program that can be descrambled among programs to be viewed. This makes it possible to effectively use the storage capacity of the storage device without storing useless content data that is not viewed.

According to a sixth aspect of the present invention, there is provided a recording medium storing a storage control program in a broadcast receiving apparatus for receiving broadcast data, wherein the storage control program includes scrambled encoded content data in the same channel. And a second step of identifying for each content whether or not there is a key code necessary to descramble each of the encoded content data received from the same channel, and A third step of descrambling the encoded content data received using the key code when there is a key code necessary for descrambling; and And a fourth step of storing the decrypted encoded content data in a predetermined storage device. A recording medium recording a storage control program.

The method according to the third aspect can be implemented by reading and executing the storage control program from the recording medium according to the sixth aspect. According to a seventh aspect of the present invention, there is provided a recording medium storing the storage control program according to the sixth aspect, wherein in the second step, content identification information for distinguishing each encoded content data is set as first content identification information. The content identification information obtained from the received broadcast data and associated with each key code existing in the broadcast receiving device is stored in the second
A storage control program for obtaining whether the key code is present by comparing the first content identification information with the second content identification information. The recording medium on which it was recorded.

The method according to claim 4 can be implemented by reading and executing the storage control program from the recording medium according to claim 7. An eighth aspect of the present invention is a recording medium storing the storage control program according to the sixth aspect, wherein the storage medium identifies whether or not there is information indicating a storage request for each of the encoded content data received from the same channel. Recording a storage control program, further comprising the step of: storing encoded content data descrambled in the fourth step only for encoded content data in which information indicating a storage request exists. Recording medium.

By reading the storage control program from the recording medium of claim 8 and executing it, the method of claim 5 can be implemented.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a storage medium for storing a broadcast storage method and a storage control program according to the present invention will be described with reference to FIGS. This form corresponds to all claims.

FIG. 1 is a block diagram showing a configuration example of a system used in this embodiment. FIG. 2 is a flowchart showing the processing of the storage control unit of the viewer-side device. FIG. 3 is a schematic diagram showing a configuration example of the program management DB. FIG. 4 is a time chart showing a configuration example of broadcast data transmitted by a broadcasting station. FIG. 5 is a time chart showing a configuration example of broadcast data transmitted by a broadcasting station.

In this embodiment, it is assumed that broadcast contents are distributed using radio waves, such as terrestrial broadcasting and satellite broadcasting. That is, using the broadcast station apparatus 20 and the viewer apparatus 30 as shown in FIG. 1, the viewer apparatus 30 receives the radio wave transmitted from the broadcast station apparatus 20. In digital broadcasting, signals of a plurality of channels are generally multiplexed and transmitted from one broadcasting station on the same radio wave.
The broadcast station device 20 and the viewer-side device 30 are configured to support transmission and reception of only a single-channel signal.

Of course, if the signal is multiplexed using a plurality of main components of the broadcast station device 20, it is possible to cope with the signal transmission of a plurality of channels, and the received signal of the plurality of channels multiplexed in the viewer side device 30. Can be selectively or simultaneously received. The broadcasting station device 20 shown in FIG.
1, encoding unit 22, scramble processing unit 23, key code management unit 24, transmission unit 25, antenna 26, and program management unit 2
7 is provided.

The content transmitting section 21 is an apparatus for transmitting digital information such as a television program composed of video and audio, that is, content. For example, the content transmission unit 21 can be configured by a digital video tape recorder in which a program is stored in advance, or an analog tape recorder and an A / D converter. According to a predetermined schedule, it is necessary to sequentially transmit the specified contents at the specified time from the content transmission unit 21. The program management unit 27 manages such a transmission schedule, and the program management unit 27 controls the content transmission unit 21.

The program management section 27 holds, for each content, information for specifying a distributor (producer) and information on a product number as identification information for specifying each content. In synchronization with the transmission timing of each content, the information of the seller of the content and the information of the product number are applied to the key code management unit 24 and the transmission unit 25. The encoding unit 22 encodes the video and audio of the content transmitted by the content transmission unit 21 in order to compress the content. For example,
What is necessary is just to perform information coding of general MPEG2 format.

The content encoded by the encoding unit 22 is input to a scramble processing unit 23. The scramble processing unit 23 scrambles (encrypts) the content so that even if the content is received on the receiving side, the content cannot be viewed as it is in order to realize the pay broadcast.
Perform processing. The type of scrambling in the scramble processing unit 23 is controlled for each content.

In order to view scrambled content, a specific key code for descrambling the content is required. Since the type of scrambling in the scramble processing unit 23 is controlled for each content, the required key code also differs for each content. The key code management unit 24 holds the information of the type of scramble and the information of the key code corresponding to the scramble in association with each other for all the contents. Then, the key code management unit 24 specifies the content currently input to the scramble processing unit 23 based on the information of the seller and the product number of the content input from the program management unit 27, and The information of the associated scramble type is given to the scramble processing unit 23. According to this information, the scramble processing unit 23 determines the type of scramble.

The transmitting unit 25 combines the content data scrambled by the scramble processing unit 23, the signal output by the key code management unit 24, and the signal output by the program management unit 27, and To generate a digital signal. Further, the high-frequency signal modulated by the digital signal in the packet format is transmitted from the antenna 26 as a radio wave.

The broadcast data transmitted from the broadcast station device 20 via radio waves is configured as shown in FIG. 4, for example.
Referring to FIG. 4, each content 10 is composed of a number of packets 11. Each packet 11 includes a packet header 12 and a packet body 13.
The packet header 12 contains program data and other data. The program data includes seller information 14 and product number information 15. The program data is information transmitted by the program management unit 27. Information such as packet length and time is inserted into other data as needed.

In the example shown in FIG. 4, the control packet 11B is included in the packet 11. This control packet 1
1B, the program data 16 is stored in the packet body 13B.
And the encrypted key code 17. The encrypted key code 17 is obtained by encrypting a key code of a specific program (content specified by the program data 16) among the key codes held by the key code management unit 24. Control packet 1
1B is used to individually distribute a key code using broadcast data to a viewer who has requested in advance.

As shown in FIG. 1, the viewer-side device 30 includes an antenna 31, a storage unit 32, and a reproduction unit 33. The storage unit 32 includes a reception unit 34, a descrambling unit 35, a server 36, a CD-ROM drive 37, a storage control unit 38, a program management DB 39, an operation unit 40, a calendar unit 44, and a card reader 45. Includes a decoding unit 41, a display 42, and a speaker 43.

Radio waves transmitted from the broadcasting station device 20 are received by the antenna 31 and demodulated into broadcast data by the receiving unit 34. Since the data of each content included in the broadcast data demodulated by the receiving unit 34 is scrambled, it is necessary to descramble the scrambled data in order to view it. Therefore, the content data output from the receiving unit 34 is input to the descrambling unit 35 and descrambled. The descrambled content data is input to the server 36.

The server 36 is constituted by a large-capacity readable / writable storage device such as a hard disk. The server 36 sequentially stores the data of the content descrambled by the descrambler 35. The content data stored in the server 36 can be read later as needed.

That is, even if the viewer is not in the broadcast time zone of the desired program, if the content data of the program is stored in the server 36, the viewer can reproduce the information read from the server 36 to obtain the desired content. You can watch the desired program during the time period. When the viewer views the content, the reproducing unit 33 requests the server 36 to transmit the content. The content transmitted by the server 36 is decoded by the decoding unit 41 and is reproduced as, for example, video or audio. The decoding unit 41 performs a decoding process of a standard method (for example, MPEG2) specified in advance. The video output from the decoding unit 41 is displayed on the display 42 as visible information, and the audio is output from the speaker 43 as sound.

By the way, in order to descramble in the descrambling unit 35, it is necessary to provide the descrambling unit 35 with a key code suitable for the type of scrambling of each content. A key code for descrambling each content is distributed from a broadcasting station or a distributor to each viewer as needed. In other words, a viewer who wants to view sends a purchase of a key code for descrambling the desired program (content) to a seller or the like using a telephone or the like for each desired program (content). When the seller receives this notification, the seller distributes the key code corresponding to the desired program to the viewer.

When the broadcasting station device 20 shown in FIG. 1 is used,
After the distributor controls the key code management unit 24, the key code of the program desired by the viewer is extracted and encrypted.
It is distributed to the viewer by being included in the control packet 11B shown in FIG. The viewer who has notified the purchase of the key code is the viewer device 3
0 control packet 11B included in the broadcast data received
To decrypt the code and receive the key code. This key code information is stored in the database of the program management DB 39.

When the encrypted key code 17 is read, for example, by using ID information read from the IC card individually held by the viewer using the card reader 45, only the specific viewer who has purchased the key code 17 is read. Can break the code.

The operation unit 40 has key switches and display elements for input operation. By operating the operation unit 40, the viewer can specify whether or not each broadcasted program is to be stored in the server 36, for example. The accumulation control unit 38 is a control device such as a microcomputer, and controls the entire operation of the accumulation unit 32. In this embodiment, a CD-ROM on which predetermined program data is recorded is set in a CD-ROM drive 37 and the CD-ROM is
The storage control unit 38 executes the program read from the server. This program includes the contents of the processes (1) and (2) shown in FIG.

Of course, this program is stored in advance in a semiconductor ROM or the like, and the ROM is stored in the storage controller 3.
8, it is not necessary to use a CD-ROM.
The program management DB 39 stores, for example, data having a configuration as shown in FIG. In the example of FIG.
, Three program management data 19 (1), 19 (2), 19 (3) are registered. Each program management data 19 includes channel information, validity period information, seller information, product number information,
A key code and storage designation information are included.

Of each program management data 19, channel information, valid period information, vendor information and product number information are the same as the program data 16 distributed by the control packet 11B shown in FIG. 4, for example. Also, the program management data 19
Is a key code included in the control packet 1 shown in FIG.
It is a result of decrypting the encrypted key code 17 distributed in 1B. The storage designation information of the program management data 19 is information indicating whether or not the viewer desires to store the program in the server 36. The content of the storage designation information can be determined by the viewer by operating the operation unit 40.

In actual broadcast data, different types of scrambling may be applied to all contents, but the same type of scrambling may be applied to a plurality of contents as shown in FIG. 5, for example. In the example of FIG. 5, the contents 10 (1), 10 (3), 10 (5)), 10 (7)
Has a common “A” scramble, and the content 1
0 (2) and 10 (6) are scrambled in common "B".

For example, the same type of scrambling may be performed even if the contents are different from each other and the contents are sold by the same source. Even in such a case, a fee can be collected for each vendor, and a key code can be shared for each vendor. The storage control unit 38 of FIG. 1 executes the processing (1) and (2) shown in FIG. Processing (1) is processing
Even during the execution of (2), it is executed periodically and repeatedly.
First, the operation of the accumulation control unit 38 for the process (1) will be described.

In step S10, the control packet 11B
Is received or not. Upon receiving the control packet 11B, the process proceeds to step S11. In step S11,
Program data 16 included in received control packet 11B
And the encrypted key code 17 is obtained. Step S12
Then, the encryption of the encrypted key code 17 is decrypted to obtain the key code. For example, I read from the card reader 45
Attempt to decrypt the code using the ID information of the C card.
If the decoding is successful, the process proceeds to step S13.

In step S13, the program data 16 obtained in step S11 and the key code decrypted in step S12 are paired and stored in the program management DB 39 as shown in FIG. In step S14, each program management data 19 stored in the program management DB 39 is checked for expiration, and if any, the program management data 19 is deleted.

The program data 16 attached to the key information distributed from the distributor contains valid period information as shown in FIG. Key information whose validity period has passed cannot be used. Therefore, in step S14, the current date obtained from the calendar unit 44 is compared with the date of the validity period information of the program data 16 to check whether the date has expired. This allows
Expired useless program management data 19 can be deleted.

In step S15, it is determined whether or not an input from a user (viewer) for specifying whether or not each content is stored is made. If there is an input, the process proceeds to step S16, and the content of “save specification information” included in the program management data 19 of the program specified according to the input operation is updated. The content of the "save designation information" is "save request" or "no save request".

Next, the contents of the process (2) will be described.
In step S20, it is determined whether or not the content has been received. If it has been received, the process proceeds to step S21. In step S21, the program data included in the packet header 12 of the received packet 11, that is, the vendor information 1
4 and product number information 15 (see FIG. 4).

In step S22, the program data 16 of all the program management data 19 stored in the program management DB 39 is input. In step S23, the seller information 14 of one program data acquired in step S21
And product number information 15 and program management D in step S22.
The "sales source information" and "product number information" of each program data 16 input from B39 are compared. If any one of the program data 16 matches, a key code for descrambling the currently received content exists in the program management DB 39, and the process proceeds to step S24.

In step S24, the presence / absence of a save request is checked by referring to "save designation information" of the program management data 19 including the specific program data 16 for which a match was detected in step S23. If the content of the "save designation information" is "save request", the process proceeds to step S25, and if "save no request", the process returns to step S20. Step S25
Then, one key code is input from the program management data 19 including the specific program data 16 for which a match is detected in step S23, and the key code is provided to the descrambler 35. As a result, the descrambling unit 35 starts descrambling the content being received.

In step S26, the server 36 is controlled to store the descrambled content data output from the descrambler 35 in the server 36. This storage operation is continued until the broadcasting of one content ends. Also, the program data 16 of the content stored in the server 36 is stored in the server 36 in pairs with the content. Therefore, when the viewer plays back the content on the playback unit 33, the playback unit 33
By inputting the product number or the like of the content to 6, the content to be reproduced can be searched on the server 36 side.

A request for delivery of content from the reproducing unit 33 to the server 36 can be made at any time as long as the content is stored in the server 36. Therefore, for example, even contents registered at night can be reproduced and viewed at any time during the day. In the example of FIG. 5, the scramble of a plurality of contents can be released using the same key code, so that a plurality of contents can be stored with one key code. However, when different types of scrambling are performed on all contents, it is necessary to prepare a key code for each content. In that case, the key code needs to be distributed frequently, but since the sales of the key code are clarified for each content, it is possible for each content creator to earn income according to the sales become.

In this embodiment, the broadcast data including the encrypted key code is transmitted from the broadcast station apparatus 20 to each viewer-side apparatus 3.
Although the case where a key code is distributed for 0 is shown, the key code may be distributed using a public network such as the Internet or a telephone network separately from broadcast data. In this embodiment, a broadcast using radio waves such as a terrestrial broadcast and a satellite broadcast is assumed. The invention can be implemented.

Although this embodiment has been described assuming a broadcast using a single channel, the broadcast station apparatus 20 can multiplex and transmit broadcasts of a plurality of channels. Even in such a case, it is necessary to manage the type of scramble on a content basis, not on a channel basis. In the case where the broadcast station device 20 transmits a broadcast of a plurality of channels, the viewer-side device 30 also needs to receive the broadcast separately for each channel. Also in this case, it is necessary to manage the key code given to the descrambler 35 not on a channel basis but on a content basis. By including “channel information” in the program data 16 as shown in FIG. 3, a key code can be managed for each content and each channel. Since the channel can be identified on the receiving side, it is not necessary to include channel information in the program data of the actual broadcast data.

In this example, the case where the broadcast data is transmitted in the packet format has been described. However, the present invention can be applied to the case where the broadcast data is transmitted in a format other than the packet.

[0059]

According to the present invention, the broadcast station broadcasts the content with different scrambling for each content,
Even when a plurality of content providers are mixed and assigned to the same broadcast channel, each provider has a different key code, and each can sell the key code to the viewer in content units. Accordingly, each vendor can obtain independent profits for each content, and for example, a broadcasting mode in which time is divided and used according to the scale and the providing capability of the content provider can be realized.

When a different key code is used for each content, the sales of the key code become clear for each content. For this reason, it is possible for a company that has created popular content to obtain more income. Also,
In the present invention, since it is assumed that the broadcast is stored and then viewed, there is no need to broadcast during a time zone in which the viewer's viewing is most concentrated, and there is an advantage that one broadcast channel can be used for 24 hours without waste.

Further, the device on the viewer side can effectively use the limited storage capacity by automatically storing only the content having the key code. The stored content can be viewed at any time according to the viewer's convenience.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a system used in an embodiment.

FIG. 2 is a flowchart illustrating a process of a storage control unit of the viewer-side device.

FIG. 3 is a schematic diagram illustrating a configuration example of a program management DB.

FIG. 4 is a time chart showing a configuration example of broadcast data transmitted by a broadcasting station.

FIG. 5 is a time chart showing a configuration example of broadcast data transmitted by a broadcasting station.

[Explanation of symbols]

 10 Contents 11 Packet 11B Control Packet 12 Packet Header 13 Packet Body 14 Seller Information 15 Product Number Information 16 Program Data 17 Encrypted Key Code 19 Program Management Data 20 Broadcast Station 21 Content Transmitting Unit 22 Encoding Unit 23 Scramble Processing Unit 24 key code management unit 25 transmission unit 26 antenna 27 program management unit 30 viewer side device 31 antenna 32 storage unit 33 playback unit 34 reception unit 35 descrambler 36 server 37 CD-ROM drive 38 storage controller 39 program management DB 40 Operation unit 41 Decoding unit 42 Display 43 Speaker 44 Calendar unit 45 Card reader

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5B017 AA06 AA07 BA05 BA07 BB02 BB03 BB10 CA07 CA16 5C053 FA20 FA21 GB06 HA29 JA24 KA24 LA06 LA14 5C064 BA01 BA07 BB01 BB07 BC01 BC07 BC16 BC17 BC18 BC20 BC22 BC23 BC25 BD02 BD08 CB08 CC04

Claims (8)

[Claims] 1. A broadcast transmitting side apparatus, after scrambling a plurality of coded content data of different types from each other, sequentially transmits the coded content data as broadcast data using the same channel, and receives the broadcast data. The broadcast receiving apparatus sequentially receives the plurality of scrambled content data from the same channel, and a specific key code necessary for descrambling the content data each time the content data is received. Identify whether it exists in the broadcast receiving side device, if the specific key code exists,
Descramble the received content data using the key code and store the descrambled content data in a predetermined storage device.If the key code does not exist, omit the storage of the content data. Characteristic broadcast storage method. 2. The broadcast storage method according to claim 1, wherein the broadcast transmitting apparatus adds content identification information for distinguishing the plurality of content data to each content data as first content identification information. The broadcast receiving apparatus transmits the first content identification information added to the received content data and the second content identification information associated with each key code existing in the broadcast receiving apparatus. A method of storing broadcasts, comprising comparing whether or not the specific key code exists by comparing with content identification information. 3. A broadcast storing method in a broadcast receiving apparatus for receiving broadcast data, wherein a first step of sequentially receiving scrambled encoded content data from the same channel, and receiving from the same channel. A second step of identifying, for each content, the presence or absence of a key code necessary for descrambling each of the encoded content data, and when a key code required for descrambling exists, A third step of descrambling the encoded content data received using the key code, and storing the descrambled encoded content data in a predetermined storage device when the key code is present. 4. A broadcast storage method, comprising the steps of: 4. The broadcast storage method according to claim 3, wherein in the second step, content identification information for distinguishing each of the encoded content data is obtained from the broadcast data received as the first content identification information. And acquiring the content identification information associated with each key code existing in the broadcast receiving side device as second content identification information, and comparing the first content identification information with the second content identification information. And identifying whether the key code is present or not. 5. The broadcast storage method according to claim 3, further comprising a fifth step of identifying whether or not there is information indicating a storage request for each of the encoded content data received from the same channel. The fourth content only for encoded content data for which information indicating a storage request exists.
Storing the coded content data descrambled in step (b). 6. A storage medium storing a storage control program in a broadcast receiving apparatus for receiving broadcast data, wherein the storage control program includes scrambled encoded content data sequentially from the same channel. A first step of receiving, a second step of identifying, for each content, the presence or absence of a key code required to descramble each of the encoded content data received from the same channel, and descrambling. A third step of descrambling the encoded content data received using the key code when there is a key code necessary to perform the decoding, and descrambling when the key code exists. Storing the encoded content data in a predetermined storage device. A recording medium recording a control program. 7. A recording medium on which the storage control program according to claim 6 is recorded, wherein in the second step, content identification information for distinguishing each encoded content data is set as first content identification information. The first content identification information is obtained from the received broadcast data, and the content identification information associated with each key code existing in the broadcast receiving side device is obtained as the second content identification information. A storage medium on which a storage control program is recorded, wherein the storage control program identifies whether or not the key code exists by comparing it with content identification information. 8. A recording medium on which the storage control program according to claim 6 is recorded, wherein said storage medium identifies whether or not there is information indicating a storage request for each of the encoded content data received from the same channel. Recording a storage control program, further comprising the step of: storing encoded content data descrambled in the fourth step only for encoded content data in which information indicating a storage request exists. Recording medium.