CN1783298B - Digital information recording and reproducing device and digital information recording method - Google Patents

Abstract

The present invention provides the following methods in order to solve the problem that the copyright owner cannot limit the number of backups and realize copyright protection for the content of "Copy One Generation" because there is no means to limit the number of backups to other media. That is, the method for recording and reproducing digital information is as follows: receiving the first digital information and the copy control information of the first digital information, and the copy control information is information for controlling recording to the recording medium of the aforementioned digital information; When the control information indicates that only one generation (Copy OneGeneration) is allowed to be recorded, the first digital information is recorded as the first digital information and the second digital information on the first recording medium in multiples, and the first digital information and the second digital information are recorded on the first recording medium. The aforementioned second digital information is in a different format or a different bit rate.

Description

Digital information recording and reproducing device and digital information recording method

technical field

The present invention relates to a device capable of restricting recording to a recording medium of digital information requiring copyright protection.

Background technique

There is Japanese Unexamined Patent Application Publication No. 2002-319227 as a document related to a digital content recording and reproducing device that supports copy generation control. This publication relates to a digital content recording and reproducing device that, when recording on a recording medium content whose copy control information indicates that only one generation (Copy One Generation) can be copied, passes Recording as "Copy One Generation", recording one copy and repairing the damaged part, or by recording multiple copies of the same content on the recording medium, after backing up on other media, the information on the hard disk can be viewed and viewed.

In recent years, mobile terminals such as mobile phones are equipped with high-precision liquid crystal displays, and the environment in which digital content can be viewed and listened to even when traveling or traveling has been improved. Under the aforementioned environment, it is conceivable to transfer one of the plurality of digital contents recorded on the recording/playback device disclosed in Patent Document 1 to the aforementioned mobile terminal for viewing and listening.

However, in the recording and reproducing device disclosed in Patent Document 1, no specific implementation means is described. In addition, since there is no means to limit the number of backups to other media, the copyright owner cannot specify the number of backups for "Copy One Generation" and realize copyright protection.

In addition, as other media to be backed up, various media such as semiconductor memory and optical disk can be considered. Compared with the hard disk connected to the recording and reproducing device, since their recordable capacity is reduced, it is necessary to start from the time of recording. The compression rate is converted to a compression rate suitable for various media.

Contents of the invention

In order to solve the above-mentioned problems, the present invention provides the following means.

The first solution is a method for recording and reproducing digital information and a digital information recording and reproducing device using the method. The method for recording and reproducing digital information includes: receiving first digital information and copy control information of the first digital information, the The copy control information is information for controlling the recording of the digital information to the recording medium. When the received copy control information indicates that only one generation (Copy One Generation) is allowed to be recorded, record a plurality of the digital information on the first recording medium. The first digital information is used as the first digital information and the second digital information, and the first digital information and the second digital information are in different formats or different bit rates.

The second solution is a method for recording and reproducing digital information and a digital information recording and reproducing device using the method. The method for recording and reproducing digital information includes: receiving digital information and copy control information of the digital information, and the copy control information is Information for controlling the recording of the digital information on the recording medium, recording the digital information on the first recording medium, and re-recording the digital information when copying the recorded digital information to the second recording medium to the first recording medium.

The third solution is a method for recording and reproducing digital information and a digital information recording and reproducing device using the method. The method for recording and reproducing digital information includes: receiving digital information and copy control information of the digital information, and the copy control information is Information that controls the recording of the digital information to the recording medium, and specifies the allowed number of copies of the digital information. After the first digital information is recorded on the first recording medium, the first digital information is automatically used as the second Digital information is copied onto said first recording medium.

According to the present invention, it is possible to provide an apparatus and method capable of restricting recording to a recording medium of a recording and reproducing apparatus requiring copyright protection of digital information, which is more convenient to use.

Description of drawings

FIG. 1 is a block diagram showing one embodiment of a digital information recording and reproducing apparatus according to the first embodiment of the present invention.

FIG. 2 is a diagram showing the configuration of recording management information according to the first embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration example of an encryption control unit according to the first embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration example of a decryption control unit according to the first embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration example of a key generation unit according to the first embodiment of the present invention.

FIG. 6 is a block diagram showing an embodiment of a digital information recording and reproducing device according to a second embodiment of the present invention.

FIG. 7 is a block diagram showing an embodiment of a digital information recording and reproducing device according to a third embodiment of the present invention.

FIG. 8 is a diagram showing a configuration of recording management information according to a third embodiment of the present invention.

FIG. 9 is a block diagram showing an embodiment of a digital information recording and reproducing apparatus according to a fourth embodiment of the present invention.

FIG. 10 is a block diagram showing an embodiment of a digital information recording and reproducing apparatus according to a fifth embodiment of the present invention.

FIG. 11 is a diagram showing a configuration of recording management information according to a fifth embodiment of the present invention.

Fig. 12 is a block diagram showing an embodiment of a digital information recording and reproducing device according to a sixth embodiment of the present invention.

FIG. 13 is a block diagram showing an embodiment of a digital information recording and reproducing apparatus according to a seventh embodiment of the present invention.

FIG. 14 is a diagram showing an embodiment of an operation screen according to the first embodiment of the present invention.

FIG. 15 is a diagram showing one embodiment of an operation screen according to the third embodiment of the present invention.

FIG. 16 is a diagram showing an embodiment of an operation screen according to a fifth embodiment of the present invention.

Fig. 17 is a diagram showing an embodiment of a digital information recording and reproducing device according to a seventh embodiment of the present invention.

Fig. 18 is a diagram showing an embodiment of a digital information recording and reproducing device according to a seventh embodiment of the present invention.

Fig. 19 is a diagram showing an embodiment of digital broadcasting according to the eighth embodiment of the present invention.

FIG. 20 is a diagram showing an embodiment of an information providing station according to an eighth embodiment of the present invention.

Detailed ways

Embodiments of the information recording and reproducing apparatus according to the present invention will be described below.

Example 1

1. Configuration example for simultaneous copying and moving

Generally, "moving" means transferring content from a first recording medium to a second recording medium, and "copying" means duplicating the same content. That is, "move" does not add the same content, and "copy" adds the same content. However, in this patent application, "copying" also includes "moving" that does not add the same content.

1 is a block diagram of an example of a digital information recording and reproducing apparatus 100 that records content to which a copy generation control signal is added on a recording medium such as a hard disk, and allows the recorded content to be moved a specified number of times to another recording medium.

1 in the figure is an input terminal for inputting, for example, an MPEG2 transport stream (hereinafter referred to as MPEG2-TS) used in digital broadcasting. Reference numeral 2 designates a control signal detection section, which detects copy generation control information included in the input MPEG2-TS, and transmits the detection result to the control section 10 through the control bus 22 . 3 is a switching part, and the flow of information from the aforementioned control signal detection part 2 and the decryption control part 14 described later is switched by the control part 10. 13 is an encryption control part, which will be encrypted by the input MPEG2-TS. 4 is a recording control part, which issues a command to record the information flow recorded on the recording medium 6 or caches the management information in the memory 9, and transmits the information flow. 5 is an input and output part, which connects the recording medium 6 to the digital information recording and reproducing device 100, and performs data transmission. Reference numeral 6 denotes a recording medium, which is constituted by, for example, a hard disk or the like. 7 is a reproduction control unit, which after issuing a command to the recording medium 6 and reproducing the management information and stream, buffers them in the memory 9 and outputs the stream to the decryption control unit 14 . In addition, the playback control section 7 provides, for example, management information or information flow to the playback disable control circuit 8 in accordance with the detection result of the control signal detection section 2 . The unreproducible control circuit 8 performs conversion processing of the inputted management information or information stream which cannot be restored, and supplies it to the recording control section 4. 9 is a memory, which buffers the information streams from the aforementioned recording control section 4 and the aforementioned playback control section 7 in different areas, reads or writes them in time-division, and continuously accesses a buffer, such as a semiconductor memory constitute. 14 is a decryption control part, which decrypts the encrypted MPEG2-TS. 10 is a control part, for example composed of a microprocessor, which controls the digital information recording and reproducing device 100. 11 is a moving count information updating part, which detects the number of times the content recorded on the recording medium 6 is moved, and sends the result to the control part. 12 is an output terminal, which outputs the content decrypted by the aforementioned decryption control section 14 . 22 is a control bus, and data communication is performed between the control unit 10 and each block connected to the control bus. 23 is a remote interface control part, which transmits a signal for the user to operate the digital information recording and reproducing device 100 from the outside to the control part 10 through the input and output part 24 .

FIG. 2 is a diagram showing an example of recording content on the recording medium 6 described above.

On a content-by-content basis, management information representing the content and data as the actual state of the content are recorded to the management information area 501 and the data area 502, respectively. For example, the file number 503 indicating the title of the content, the head address of the data and the record size 504, the copy information 508, the number of moves 509, the key 506, and the like are recorded in the management information. Content is written in the data area from an address corresponding to the head address 504 recorded in the management information area 501 . File number 1, file number 2, .

The duplication information 508 is the duplication generation control information detected by the aforementioned control signal detection section 2, for example, it can be considered to use a 2-bit signal to specify

00＝Copy Free

10=Only allow to copy 1 generation (Copy One Generation)

11 = Copy Never. In the digital information recording and reproducing apparatus 100, for the content recorded with "Copy One Generation", it is also possible to define the content that has been copied once by 01=Copy One Generation as being unable to copy more (Copy NoMore).

Regarding these, the specifications defined by ARIB-B21 (Association of Radio Industries and Business Association: Association of Radio Industries and Business Data Broadcasting System Operation Specifications) can be referred to.

The number of times of movement 509, for example, accommodates the allowed number of times to move the content that can be recorded in the same or different format as (Copy One Generation) as (Copy No More), for example, the input indicates that 3 times are allowed 2.

2. Description of the encryption/decryption control part

FIG. 3 shows an example of the configuration of the encryption control section 13. As shown in FIG. The plural numbers 201, 202, and 203 are key information, for example, unique information embedded in the recording medium 6 and a random number calculated by a random number generator are used as a seed for key calculation. 204 is an input terminal for inputting the result held in the update part of the number of times of movement information as one of the key information. One or more of the aforementioned key information 201 to 204 corresponds to the key 506 in the management information area 501 . 205 is a key generation part, which generates a key from the aforementioned key information. 206 is an input terminal, which is directly connected to the switching section 3 corresponding to the undecrypted signal. 207 is an scrambler, 208 is an output terminal, and the signal encrypted by the scrambler 207 is supplied to the recording control section 4 .

FIG. 4 shows an example of the configuration of the decryption control section 14. As shown in FIG. Like the encryption control unit 13, the key information 201, 202, 203 and the key information from the input terminal 204 are supplied to the key generation unit 205 to generate a decryption key. 209 is an input terminal for supplying a signal for reproducing the encrypted content recorded on the recording medium 6 by the reproduction control unit 7 . 210 is a decoder, and 211 is an output terminal, which generates a signal decoded by the decoder 210 .

FIG. 5 is a diagram showing the configuration of the aforementioned key generation unit 205 . 201, 202, 203, and 204 in the figure are key information, 212, 214 are registers, and 213 is a hash function calculator. The aforementioned register 212 temporarily stores the key information and inputs it to the hash function calculator 213 . The output calculated by the hash function operator 213 is held in the register 214 as an encryption key or a decoding key. Here, as an example of key information, 168 bits that connect key information 1 of 128 bits, key information 2 of 8 bits, key information 3 of 16 bits, and key information 4 of 16 bits are supplied to the hash Hash function calculator 212 . The 168 bits are subjected to a hash operation in the hash function calculator 212, and for example 128 bits of the calculation result are extracted and used as a key. Hash The hash function is a function that is difficult to analogize the input function from the output result, and the key information as secret information cannot be obtained from the data key. In the present invention, there is no particular limitation on the number, connection method, and bit width of the aforementioned keys.

In the aforementioned configuration, since the "number of times of duplication" as one piece of key information changes every time the data is moved, the key is calculated at this time, and the key information 506 in the management information area 501 is updated.

Since the key is different for the same content, the recorded content cannot be decrypted even if only the "number of copies" is changed, so that the number of transfers of the content can be more reliably limited, and a high degree of copyright protection can be realized.

In addition, by changing any one of the aforementioned 201, 202, 203, and 204 when moving, restrictions on movement can also be prescribed.

3. Action description

Next, when the content of file number 1 is recorded, the copy generation control signal is "Copy One Generation", and the operation of allowing three moves out of the number of moves 509 will be described.

First, at the time of recording, the recording management information 501 such as the address of the recording target of the content is set on the control unit 10 , and is recorded on the recording medium 6 through the recording control unit 4 . Next, MPEG2-TS is input from the input terminal 1, the copy generation control information attached to the specific packet is detected in the control information detection part 2, and the detection result "10" is notified to the control part 10 via the control bus 22. Since the copy management information received by the aforementioned control section 10 is "Copy One Generation", further copying "Copy No More" is prohibited, and is included in the copy information 508 of the aforementioned content.

In addition, when recording the above-mentioned content, the number of times of copying can be 3 times, and "2" from 3 minus 1 is set to the key information 214 to generate a key, and the used key information is used as the key of the management information area 501 Information 1 is recorded. Then, until the end of the recorded content, the encrypted recording is continued in the data area 502, and the specified recording is terminated, or the size and the address are recorded together with the address when the user's stop request is input from the remote interface control section 23. Although the aforementioned content is "Copy No More" in the copy management information, it can be moved twice.

Next, playback (movement) of the content of file number 1 will be described. FIG. 14 is an example of an operation screen for a user to operate by connecting the output terminal 12 of the digital information recording and reproducing apparatus 100 to a decoder, a monitor, and the like.

In the figure, (a) is a diagram showing a list of recorded contents, (b) is a diagram showing a screen for confirming the number of transfers transferred from (a), and (c) is a screen showing a screen for selecting a transfer object after transferring from (b). In the figure, (d) shows an example of the screen showing the end of movement and subtracting the number of times allowed to move, and (e) further shows an example of transitioning from (d), performing the permitted number of times of movement, and deleting content from the title bar. 401 is the title of the recorded content, 402 is the recording date, 403 is the recording mode showing the bit transfer rate at the time of recording, 404 is the number of times that can be moved, and 405 is a menu for selecting the moving object.

First, when the control unit 10 detects from the remote interface control unit 23 a signal indicating that the user has selected "replay" or "move", it reads out the management information area 501 recorded in the recording medium 6, and displays a list of recorded contents. (a) screen in the figure. When the control section 10 in Fig. 2 detects the signal showing that the title "AAAAA" has been selected by the user, the information of the file number 1 corresponding to the content of "AAAAA" is read out, and at this moment, transition to (b) The screen displays the number of possible moves to the user, prompts confirmation of the move, and waits for input.

Thus, the user can recognize the number of times that can be moved, realize the remaining number of times, and execute it.

When the user's permission is detected, it transitions to the screen (c) in the figure to determine the moving object. Here, the screen (b) and the screen (c) in the figure may be the same screen.

When the user selects an object to move, the key information 506 is read from the management information in FIG. 2 . Next, the read values are set to the respective key information of the decryption control section 14 in FIG. 1 and a decoding key is generated. Furthermore, the generated decryption key is set in the decryption control unit 14 .

Also, the number of times of movement information update unit 11 refers to the number of times of movement 509 in the management information, and retains the value "1" obtained by subtracting "1" from the original value "2". In addition, the control unit 10 recreates the file number n having the same data size as the file number 1 in the management information area 501 in FIG. At the same time, the management information of the file number 1 is supplied from the playback control section 7 to the disablement control section 8, and the original data is rewritten, for example, all to "1" after calculation processing, and the result is held.

Even if the management information calculated in the above-mentioned disabled control section 8 is used only as the key information 506, since the original key is not generated, the same effect can be obtained, and the required control time is minimized.

In addition, after the switch section 3 is switched to the signal from the playback control section 7, the contents of the specified size are extracted from the head address recorded in the address 1, and the moving process is started. At this time, the playback control section 7 changes the copy management information of the content to be moved to "CopyOne Generation".

After the reproduced content is decrypted on the decryption control section 14, simultaneously with output from the output terminal 12, the copy management information is passed through the aforementioned switching section 3, the aforementioned encryption control section 13, the aforementioned recording control section 4, and the aforementioned memory 9 as "Copy The contents of "No More" are sequentially recorded from the head address of address n assigned file number n. The number of copies of one of the key information at this time becomes "1". The playback control section 7 buffers each content in the memory 9, and the recording control section 4 performs time-sharing control on the recording medium 6 to continuously perform recording and playback. When reproduction and recording of the designated size are completed, the calculation result of the file number 1 held in the disablement control unit 8 is written in the management information area of the file number 1 through the recording control unit 4 .

Then, by rewriting the file number of the management information of the file number n to 1, the content of the file number 1 whose copy number is reduced by 1 exists in the aforementioned recording medium 6 . FIG. 14( d ) becomes the operation screen at the end of the movement, and the copy count is changed to "1".

In addition, when the copy number "1" is moved, no copy is generated in the management information area 501, and when the move is completed, the management information that cannot be reproduced is rewritten by the management information of the file number 1 in the disabled control unit 8. Thereby, as shown in the screen (e), the content of the title "AAAAA" is deleted.

Through the aforementioned configuration, it is possible to realize a recording and reproducing device that records "Copy One Generation" content with a copy generation control signal, and limits the number of transfers of content that has become "Copy No More", so that the copyright owner of the content can protect the copyright. In addition, the user can move the same content to other recording media within a specified number of times, and since the content exists in the recording and playback device even after moving, the convenience of viewing and listening can be improved. In addition, since a plurality of identical contents are not prepared, the capacity of the recording medium 6 can be effectively used.

Example 2

4. Application example of recording to the recorder

Next, an example in which the digital information recording and reproducing apparatus 100 of the first embodiment is applied to a digital broadcast recorder 1000 will be described using FIG. 6 . For the contents of the same function, the same symbols are used, and descriptions are omitted.

301 is an input terminal for inputting, for example, radio waves from a relay station such as a broadcast satellite. 302 is a tuning section, where the frequency of radio waves in the RF band is converted to an IF band (Intermediate Frequency), and output to the demodulation section 303 as a signal of a fixed frequency band that does not depend on the receiving channel. The demodulation section 303 demodulates the modulation operation performed in the bit stream input from the tuning section 302 for transmission. In the error correction section 304 , an encoding error occurred during transmission is detected, and the error correction is performed, and then output to the filter section 304 . After the filtering section 305 deciphers the transmission of the MPEG2-TS input from the recording medium 304, it selects the 1-transmitter frequency for multiplexing the program recorded on the recording medium 6, and the bit stream in the selected 1-conveyor Separate audio and video packets into 1 program. 306 is a time stamp adding part, and the packet interval at the time of reception is kept even during reproduction on the time adjustment part 307 described later, so the PTS (Presentation TimeStamp) as time management information is detected from the received packet. ) and the STC (System TimeClock) inside the reference decoder of the MPEG system add a time stamp at the time corrected by the aforementioned detection results, and supply the MPEG2-TS with the time stamp to the input terminal 1 of the digital information reproduction device 100, Encrypted recording is performed on the recording medium 6 .

When reproducing, the TS packet decrypted from the output terminal 12 of the digital information recording and reproducing apparatus 100 is received, and the time adjustment part 307 refers to the added time stamp, and the PTS as the time management information of the reproducing output is at the same time as the STC. The storage unit is reproduced and output. The output of the aforementioned timing adjustment section 307 is supplied to an AV decoder 308 on which input audio and video data are decoded, audio data is output to a digital encoder 309, and video data is output to a video DAC 311, respectively. The digital encoder 309 converts the video data received from the AV decoder 308 into a TV output signal, and outputs it to the outside through the output terminal 310. Audio DAC 311 converts audio data received from AV decoder 308 into an analog signal, and outputs it to the outside through output terminal 312 . In addition, in order to move the content to the second recorder or recording medium, the output terminal 12 detects the copy management information on the second control signal detection part 313 and converts "CopyOne Generation" to "Copy No More", and uses the second The content encrypted by the encryption control unit 314 is supplied to the digital interface control unit 315 , and the content is transferred to the second recorder or recording medium connected to the output terminal 316 .

In this configuration, as shown in the description of Embodiment 1, it is possible to record the digital broadcast content of "Copy One Generation" to the first recording medium with the recorder 1000, such as a hard disk. It is a function to perform a limited number of transfers to removable second recorders or recording media such as DVHS, optical discs, and memory cards as "Copy No More" content. Therefore, the copyright owner of the content can protect the copyright. In addition, the user can move the same content to another recording medium within a specified number of times, and the content exists in the recording and reproducing device even after moving, so it can be viewed and listened to, and usability is improved. In addition, since a plurality of identical contents are not prepared, the capacity of the hard disk can be effectively used.

As an alternative to the aforementioned digital interface control section 315, a second recording control section may be provided to similarly perform movement of other recording media with a limited number of times. In addition, because encryption is carried out on the mobile object, the copyright can also be protected.

Example 3

5. Pre-create the composition of copying, moving and deleting

Next, an example in which content for moving is generated in advance when recording content and deleted when moving is performed will be described using FIG. 7 . For the same functions, the same symbols are used and descriptions are omitted.

In the figure, 15 and 16 are encoders, and for the input content, the second and third recording media connected to one of the output terminals 12, 18, 19 are connected to the recording capacity, and the compression rate is used for encoding.

For example, the compression rate is down-converted from a high-definition (High Definition, hereinafter referred to as HD) method in digital broadcasting such as high-definition broadcasting to a standard definition (hereinafter referred to as SD) to obtain an optimum recording capacity. The encoding method is not limited to this, and it may be converted to a bit rate compatible with the recording medium as an MPEG4 or H.264 encoder. The aforementioned first and second encoders 15 and 16 compress the signal from the control signal detection section 2 and output it to the switching section 3 . The control section 10 time-divisionally switches the aforementioned switch section 3, supplies the outputs of the aforementioned control signal detection section 2 and the aforementioned encoders 15, 16 to the recording control section 4 via the encryption control section 13, and temporarily passes through the recording control section 4 at any time. While storing in the memory 9, the information stream temporarily stored in the memory 9 is recorded in the recording medium 6.

According to such a configuration, the received content, the second content compressed by the first encoder, and the third content compressed by the second encoder can be recorded on the recording medium 6 with the same configuration.

FIG. 8 shows an example of the management information area 501 and the data area 502 of the recording medium 6. As shown in FIG. In the management information area 501, for the same content, three files having different bit rates, file number 0_1, file number 0_2, and file number 0_3, are generated. The number of copies is set to "1" because only one copy is allowed. According to the bit rate of the management information, for example, the content for the card, the content for the optical disc, and the content for IEEE1394 are displayed to the user; For example, the ATAPI interface for output terminal 19 and recording to an optical disc is equipped with an IEEE1394 interface for distributing IEEE1394 content to the output terminal 12 and AV decoder 308, and recording to a D-VHS recorder. By selecting it, there is a function that does not require fine settings when moving.

In addition, on the contrary, the bit rate of the encoder 15 and/or the encoder 16 can be set arbitrarily by the user, and a more suitable bit rate can be generated on the recording medium connected to the output terminals 12, 18, 19. The content can be optimized for the capacity of the recording medium 6 and the execution speed of the movement.

Also, by setting the encoder 15 and the encoder 16 to the same compression ratio, two contents having the same compression ratio can be generated.

In addition, even if the aforementioned encoders 15 and 16 are deleted and switched by the aforementioned switching section 3, three contents with the same compression rate can be generated.

6. Action description

Next, the operation of moving the content recorded on the recording medium 6 will be described for the file number 1_2.

The control unit 10 reads the management information area 501 from the recording medium 6 when moving the content. FIG. 15 is an example of an operation screen for a user to operate by connecting a decoder and a monitor to the generation terminal 12 of the digital information recording and reproducing apparatus 100 .

In the figure, (a) is a diagram showing a list of recorded contents, (b) is a diagram showing a screen for migrating from (a) and confirming files that can be moved, and (c) is a diagram showing migrating from (b) and selecting a moving object. In the diagram of the screen, (d) is a diagram showing a screen that further transitions from (c) and deleted the moved recording mode, and (e) is a screen showing that the content is deleted from the title after the allowed number of shifts is performed. .

When the user "moves", first, the control unit 10 reads out the management information area 501 recorded on the recording medium 6, and displays the screen (a). When the user selects the title "BBBBB" corresponding to the file number 1, the screen transitions to (b) and a file at a bit rate that can be moved is displayed.

Next, if the file "LP mode" to be moved is selected, the screen transitions to (c), and the moving target is determined as "memory card", for example. When the transition to moving is performed, the moving count information update unit 11 refers to the moving count 509 in the management information area 501, changes it to "1" and holds it. In addition, the control unit 10 supplies the management information of the file number 1_2 from the playback control unit 7 to the disablement control unit 8, performs calculation processing such as rewriting all the addresses 504 to "1", and further replaces the value of the number of shifts 509 After updating the value of the part for the number of moves information, keep the result.

When the setting is completed, the movement starts, and the reading of the content of the specified size starts from the head address recorded at address 5 . At this time, the playback control section 7 changes the copy management information of the moved content to "Copy One Generation".

The reproduced content is decrypted and output from the output terminal 12 . When the reproduction of the specified size is completed, the recording control unit 4 writes the calculation result of the file number 1_2 held in the disablement control unit 8 into the management information area of the file number 1_2.

As a result, it becomes the screen (d) in which "LP mode" is deleted. If the "SP mode" is further moved, the screen becomes (e), and the title "BBBBB" corresponding to the file number 1 is deleted.

In the aforementioned configuration, since the copy generation control signal records "Copy One Generation" content, since it is possible to realize a recording and reproducing device that limits the number of transfers of the same content with different bit rates as "Copy No More" content, it is possible for the copyright owner Protect copyright. In addition, the user can move the same content at an appropriate bit rate to another recording medium within a specified number of times, and since the content exists in the recording and reproducing device even after moving, viewing and listening can be performed. In addition, since the content to be moved has already been generated at the time of recording, the time required for moving can be shortened and the convenience of use can be improved.

Example 4

7. Application example of recorder

Fig. 9 is a block diagram showing an embodiment in which the digital information recording and reproducing apparatus of Embodiment 3 is applied to a digital broadcast recorder.

Adopt to connect the optical disc as the second recording medium on the recording control part 319, connect the memory card as the third recording medium on the recording control part 323, connect the memory card as the fourth recording medium on the output terminal 316 of the digital interface control part 315. Configuration of D-VHS recorder with IEEE1394 interface.

According to this configuration, each recording medium can be moved once, and the same content can be moved twice to the same recording medium by switching the content output to the output terminals 12, 18, 19 by the playback control section.

In addition, the copy generation management information is output from the output terminals 12, 18, and 19 from "Copy NoMore" as "Copy One Generation" in the playback control section. In the control signal detection sections 313, 317, 321, the copy generation control signal is detected, and the content is recorded on each recording medium by changing from "Copy One Generation" to "Copy No More". Here, the digital information recording and reproducing device 100 is integrated with other components. For example, when LSI (Large Scale Integrated Circuit) is used, the control signal detection sections 313, 317, and 321 may be omitted, and the copy generation control signal may be shifted to the "Copy No More" state. Through the composition in the early stage, the simplification of the circuit can be achieved, and the cost of the LSI can be reduced.

By configuring the digital broadcast recorder as above, since it is possible to record the "Copy One Generation" content with the copy generation control signal, it is possible to limit the number of transfers of the same content with the "Copy NoMore" bit rate. For the copyright owner , can protect copyright. In addition, the user can move the same content at an appropriate bit rate to other recorders and recording media within a specified number of times. Since the content exists in the above-mentioned digital playback recorder even after the move, it is possible to perform video recording. listen. In addition, since the content to be moved has already been generated at the time of recording, the time required for moving can be shortened and the convenience of use can be improved.

In Embodiments 3 and 4, an example in which the bit rate is different for the same content is described, but the present invention is not limited to this, and it goes without saying that an example in which the format is different may also be used.

Example 5

8. Count down the number of rights to move. Copying is made while moving, but the user can only see the remaining number of entitlements.

Next, using FIG. 10 and FIG. 14 , an example will be described in which the moving content is generated in advance, the moving content is re-recorded when the moving is performed, and the user is only notified of the number of times the user can move.

16 is an example of an operation screen for a user to operate by connecting a decoder, a monitor, etc. to the generation terminal 12 of the digital information recording and reproducing apparatus 100. (a) is a diagram showing a list of recorded contents, (b) is a diagram showing a screen for checking files that can be moved from (a), and (c) is a screen showing migration from (b) and selecting a moving object. In the diagram of the screen, (d) is a diagram showing a screen showing transition from (c) and deleting the moved recording mode, and (e) is a screen showing that the content is deleted from the title after the allowed number of shifts is performed.

The signal switched by the switching section 3 in FIG.

The output of the switching section 3 is sequentially encrypted in the encryption control section 13 , and recorded in the recording medium 6 while being temporarily stored in the memory 9 by the recording control section 4 . As the key at this time, for the same content, the copyright of the content can be protected for either a common value or a different value.

In addition, by using the value of the number of movement information updating section 11 as one of the key information and changing it every time it is moved, it is also possible to increase the strength of protection for the content protection of the entire system. When recording content, the encoder 15 and the encoder 16 generate content of different bit rates and generate three file numbers, which is the same as that of the third embodiment. Here, when moving, the switching part 3 is set as an output from the decryption control part 7, and the content of the moving object is encrypted and recorded on the recording medium 6 again and the number of times of moving recorded in the management information area 501 509 and copy information 508 are different in that the same contents with different rates are the same.

In such a form, the number of possible moves and the rate of moving contents are displayed to prompt the user to make a decision, as in (b) screen is displayed to the user. When the movement is completed, it will change to (c) screen, and the number of times that can be moved will be reduced.

Next, although in the case of moving, it becomes (d) screen, and the number of times of moving is reduced to one, but since the content of each bit rate exists in the recording medium 6, "SP mode" and "LP mode" can be selected. "One of them.

When the transfer permission count is "0", all management information is disabled by the disabling control section 8, and the screen (e) is deleted from the title.

FIG. 11 is a diagram showing a management information area 501 and a data area 502 recorded on the recording medium 6 . In this example, the copy information 508 and the number of shifts 509 are made the same in units of content. At the time of playback, the content at the bit rate selected by the user is played back, and at the end of each shift, the common shift count 509 is reduced, and when the shift count 509 is "0", it is deleted from the management information area 501 .

With the aforementioned configuration, since the copy generation control signal can be used to record "Copy One Generation" content and limit the number of transfers of the same content as "Copy No More" with a different bit rate, the copyright can be protected for the copyright owner. In addition, since the user can move the same content at the same or different bit rate to another recording medium within a specified number of times, the content exists in the recording and reproducing device even after moving, so viewing and listening can be performed. In addition, since the moved content is generated at the time of recording, the time required for moving can be shortened. Also, since the content at the bit rate shifted once is re-recorded again, the content at the same bit rate can be shifted multiple times within a specified number of times. In addition, the user can set the bit rate of the encoder 15 and the encoder 16 arbitrarily, and preset the optimum capacity for the second and third recording media, thereby improving the convenience of use.

9. Application example of recorder

Fig. 12 is an embodiment in which the digital information recording and reproducing device of Embodiment 5 is applied to a digital broadcast recorder. The output terminal 12 outputs content for display on a display and for transfer to a second recording medium. The content converted to the bit rate transferred to the third recording medium is output to the output terminal 18 . In addition, the content converted to the bit rate transferred to the fourth recording medium is output to the output terminal 19. The moved content is recorded again on the recording medium 6 through the switching section 20 and the switching section 3, and only the number of times of movement information is reduced. Therefore, for example, even if the content whose bit rate has been converted is moved from the output terminal 12, if the number of copies information is not "0", the content of the same rate can be moved again later.

With the digital playback recorder of the aforementioned configuration, since it is possible to record "Copy One Generation" content by copying the generation control signal and limit the number of times of movement of the same content as "Copy No More" with a different bit rate, for the copyright owner, Copyright can be protected. In addition, since the user can move the same content at the same or different bit rate to another recording medium within a specified number of times, the content exists in the recording and reproducing device even after moving, so viewing and listening can be performed. In addition, since the moved content is generated at the time of recording, the time required for moving can be shortened. Also, since the content at the bit rate shifted once is re-recorded again, the content at the same bit rate can be recorded multiple times within a specified number of times. In addition, the user can set the bit rate of the encoder 15 and the encoder 16 arbitrarily, and preset the optimum capacity for the second and third recording media, thereby improving the convenience of use.

In addition, when recording to the second, third, and fourth recording media, the encryption control sections 314, 319, and 323 suitable for the respective formats are also added to perform encryption, so copyright protection can be realized even in moving objects.

Example 6

10. Perform pulldown at idle time

Next, an example in which recorded content is down-converted to generate mobile content at idle times when recording and playback operations are not performed will be described using FIG. 13 .

A configuration is adopted in which the switch section 21 is newly installed at the input of the encoder 15 to input the outputs of the control signal detection section 2 and the decryption control section 14 . Normally, the switching section 21 selectively controls the detecting section 2 to perform compression processing at a bit rate specified by the user. One of the outputs of the aforementioned encoder 15 and the control signal detecting section 2 is recorded on the recording medium 6 at the switching section 3 . Here, the control section 10 starts at a time when the timer recording is not set or at a time zone set by the user (such as late at night, etc.), reproduces the content recorded on the recording medium 6, and switches the switching section 21 to the decryption control section 14, A finite number of the same content is generated with bitrate shifted. Every time playback for bit conversion is performed, a new file number 503 is added to the management information area 501, and a file for moving of the allowed number of times of copying is generated. When the number of times allowed for file copying is not generated, it is managed so that when the file is moved, the number of times of file generation for moving is automatically reduced so that the number of times allowed is not exceeded.

With such a configuration, since a copy generation control signal can be used to record "Copy One Generation" content and limit the number of transfers of the same content as "Copy No More" with a different bit rate, the copyright can be protected for the copyright owner. In addition, the user can move the same content at the same or different bit rate to another recording medium within a specified number of times, and since the content exists in the recording and reproducing device even after moving, viewing and listening can be performed. In addition, since moving content is generated during the time period when the user is not using it, the time required for moving can be shortened. Also, since the content at the bit rate shifted once is re-recorded again, the content at the same bit rate can be recorded multiple times within a specified number of times. Improve the convenience of use.

In addition, by providing one encoder 15, it is possible to reduce the cost of an LSI or a recording/reproducing device,

In addition, although this embodiment describes the case where down-conversion is performed during idle time, the present invention is not limited thereto, and content for movement may be generated without down-conversion. Ease of use can be improved for users who want to move without sacrificing quality.

Example 7

11. Example of a recorder that reproduces and records content recorded on a DVD, etc.

FIG. 17 shows an example of reproducing content recorded on an optical disk as the second recording medium 320 and recording it on the first recording medium 6 in the digital information recording and reproducing apparatus according to the fourth embodiment.

The copy generation control signal is pre-recorded as "Copy One Generation" by the manufacturer of the recording medium 320 on the content to be recorded.

The aforementioned recording medium 320 is inserted into the tray of the recorder 1000, and if a signal indicating that the user has selected the recording start is input to the input and output part 25, the content is reproduced from the recording medium 320 through the reproduction control part 325, and the decryption control part 326 The encrypted content is decrypted and supplied to the input terminal 1.

With such a configuration, the number of shifts can be specified even in content recorded on an optical disc or the like that is only intended to be reproduced, and the usability of the recorder 1000 can be improved.

FIG. 18 shows an example in which the content recorded on an optical disc as the second recording medium 320 is reproduced and recorded on the first recording medium 6 by the digital information recording and reproducing apparatus of the fifth embodiment.

In such a configuration, the number of times of movement of the content recorded on the recording medium 320 can be specified, thereby improving the usability of the recorder 1000 .

Here, a method of switching the content input to the input terminal 1 of the recorder 100 shown in FIGS. 17 and 18 from both the digital broadcast and the recording medium 320 may be adopted.

Also, the same effect can be obtained by making the recording medium to be reproduced such that the recording medium 324 and the recording medium 320 can be selected.

Example 8

12. Examples of relationship between digital broadcast applications and recorders

Next, an overall description will be given of the above-mentioned digital broadcast television playback system applied to the above-mentioned embodiment using FIG. 19 and FIG. 20 .

FIG. 19 is a block diagram showing an embodiment of the overall system used in the present invention, showing the case of sending and receiving information during playback, or recording and playback as an example. The digital information recording and reproducing apparatus of the present invention is included in this figure. 601 is an information providing station such as a broadcasting station, 602 is a relay station, 1000 is a recorder including a digital information recording and reproducing device, 604 is a display, and 605 is a second recording and reproducing device. In addition, when recording for playback or the like here, it may be recorded on either the first recording medium 6 included in the digital recording and reproducing device, the second recording and reproducing device 605, or both.

An information providing station 601 such as a broadcasting station transmits a signal electric wave modulated by information through a relay station 602 such as a broadcasting satellite, for example. Of course, other methods such as transmission by cable, transmission by telephone line, transmission by ground wave, etc. may also be used. The radio wave of this signal received by the recorder 1000 on the receiving side is demodulated and converted into an information signal, and then converted into a signal suitable for recording on the first recording medium 6 or the second recording and reproducing device 605 as necessary, and then recording is performed. . In addition, it is transmitted to the display 604 . Here, the user can directly view and listen to the content of the information.

In addition, the information reproduced on the first recording medium 6 and the second recording and reproducing device 605 is sent to the display 604 through the recorder 1000, and the original information such as video and audio can be viewed and listened to. When a detachable recording medium on which information is prerecorded is provided, the reproduction operation of, for example, the second recording and reproducing device 605 after mounting the recording medium is performed. In addition, although information reception between devices is often performed by digital signals, for example, the recorder 1000 and the display 604 may be connected by analog signals.

FIG. 20 is a block diagram showing a configuration example of an information providing station 601 such as a broadcasting station in the implementation system. 701 is a source generating part, 702 is an encoding circuit for compression by MPEG method, 703 is a scrambling circuit, 704 is a modulation circuit, 705 is a transmitting antenna, 706 is a management information giving circuit, and 707 is an input terminal. Information such as video and audio generated in the source generating part 701 composed of a camera and a recording and reproducing device can be transmitted with a smaller occupied frequency domain, and the data volume can be compressed through the encoding circuit 702 . Transmission encryption is performed on the scramble circuit 703 as necessary so that only specific viewers can view and listen. After the signal is modulated so as to be a signal suitable for transmission by the modulation circuit 704, it is transmitted as radio waves from the transmission antenna 705 to the relay station 602 such as a broadcasting satellite or the like. At this time, in the management information adding circuit 706, the aforementioned copy control information is started, and information such as the current time is added. In addition, inputting, for example, request information from the input terminal 707 via a telephone line or the like was omitted in the previous FIG. 19 . This can be used in a system that determines information to be sent in response to requests from viewers such as video requests. In addition, in practice, methods such as time-sharing and spectrum diffusion are used to multiplex multiple pieces of information on one radio wave.

Although it is not shown in FIG. 20 for simplicity, in this case, there are multiple systems of the source generation part 701 and the encoding loop 702, and between the encoding loop 702 and the scrambling loop 703, a plurality of information multiplexers are set. multiplexed multiplexing loop. In the aforementioned management information giving circuit 706, the digital broadcast operator can limit the number of times of movement on the digital information recording and reproducing device 1000 by specifying the number of times of movement for the content, and protect the copyright of the content. It is a digital playback system that can move the same content multiple times within the number of times set on the side, improving the convenience of use.

Although in FIGS. 19 and 20, information is transmitted by the transmitting antenna via the relay station, it is not limited thereto. For example, the information providing station may be a server, and the connection from the server to the digital information recording and reproducing apparatus may be via the Internet.

In addition, of course, a combination of the above-mentioned embodiments may also be an embodiment of the present patent application.

Claims (21)

1. A digital information recording method, characterized in that, receiving first digital information and copy control information for said first digital information, The copy control information is information for controlling recording of the digital information on a recording medium, When the received copy control information indicates that only one generation is allowed to be recorded, record the first digital information on the first recording medium as the first digital recording information and the second digital recording information, and record as a plurality of digital information , said first digital record and said second digital record are in different formats or different bit rates, When copying the first or second digital recording information recorded on the first recording medium to the second recording medium, the first or second digital recording information recorded on the first recording medium At least some of it cannot be reproduced. 2. The digital information recording method according to claim 1, wherein: The time at which the plurality of digital information is recorded as the first digital record information and the second digital record information is the time at which the first digital information is received. 3. A digital information recording method, characterized in that, receiving digital information and copy control information for said digital information, The copy control information is information for controlling recording of the digital information on a recording medium, recording said digital information on a first recording medium, When copying the recorded digital information to a second recording medium, rewriting the digital information into newly created digital information having the same content as the digital information, and recording it on the first recording medium, when recording the digital information to the first recording medium, recording the encrypted digital information, When re-recording the re-created digital information on the first recording medium, the re-created digital information is encrypted by using a key different from the key used for the encryption, and then recorded . 4. The digital information recording method according to claim 3, wherein when the digital information is recorded on the first recording medium, the permitted number of copies is used as a key. 5. A digital information recording and reproducing apparatus, which receives digital information including image information and/or audio information, and copy control information as information for controlling recording of said digital information on a recording medium, and records said digital information in said digital information. on the above-mentioned medium and reproduce it, it is characterized in that it has A recording circuit that performs prescribed processing on the digital information and records it, a reproduction circuit that performs predetermined processing on the digital information and outputs it; and a control loop controlling said recording loop and said reproduction loop, The control circuit controls the recording circuit to record a plurality of the digital information on the first recording medium in different formats or different bit rates when the copy control information indicates that only one generation of recording is permitted. 6. The digital information recording and reproducing apparatus according to claim 5, wherein: The control circuit performs control so that at least a part of the digital information recorded on the first recording medium cannot be reproduced when the digital information recorded on the first recording medium is copied to the second recording medium. . 7. A digital information recording and reproducing apparatus, which receives digital information including image information and/or audio information, and copy control information as information for controlling recording of said digital information on a recording medium, and records said digital information on said digital information. on the above-mentioned medium and reproduce it, it is characterized in that it has a recording circuit for performing prescribed processing on said digital information and recording it on a first recording medium, a reproducing circuit that performs predetermined processing on the digital information and outputs it from the first recording medium, a control loop controlling said recording loop and said reproduction loop, encrypting the received digital information, outputting the encryption circuit to said recording circuit, and a decryption circuit for decrypting the encrypted digital information output from the reproduction circuit, The control circuit performs control so that when the digital information recorded on the first recording medium is copied to the second recording medium, the digital information is rewritten into newly created digital information having the same content as the digital information. information, recorded on said first recording medium, The control circuit controls so that when copying to the second recording medium, the digital information decrypted by the decryption circuit is output to the second recording medium, and is also output to the encryption circuit, and the encryption circuit uses A key different from that of the received digital information encrypts the output digital information. 8. The digital information recording and reproducing apparatus according to claim 7, wherein: When recording digital information to the first recording medium, the permitted number of copies is used for a key. 9. A digital information recording method, characterized in that, receiving digital information and copy control information for said digital information, The copy control information is information for controlling recording of the digital information on a recording medium, In the case that the received copy control information indicates that only one generation of recording is allowed, recording the digital information together with the allowed number of copies of the digital information on the first recording medium, When the recorded digital information is moved to the second recording medium, the digital information is rewritten into newly created digital information having the same content as the digital information, and the newly created digital information and the updated The allowed number of copies is recorded on the first recording medium, and when the recorded digital information or the recreated digital information is moved to the second recording medium, the recorded digital information or the recreated digital information At least a part of the created digital information cannot be reproduced. 10. The digital information recording method according to claim 9, wherein the permitted number of copies recorded on the first recording medium is output to a display device. 11. A digital information recording and reproducing device for recording and reproducing digital information including image information or audio information on a recording medium, characterized in that: In the digital information, copy control information indicating whether to allow the digital information to be recorded on the recording medium is included, have: A recording circuit that performs prescribed processing on the digital information and records it, A playback circuit that performs predetermined processing on the digital information and outputs it, a control detection loop for detecting said copy control information from said digital information, an unreproducible circuit for making at least a part of the digital information recorded on the recording medium unreproducible, a copy count information updating circuit for updating copy count information indicating a predetermined allowable count of copy to the recording medium of the digital information, and a recording and reproduction control circuit for controlling a reproduction operation of the reproduction circuit and a recording operation of the recording circuit based on a detection result detected by the detection circuit, the recording and reproduction control loop controls the recording loop, In the case where the copy control information indicates that only one generation of recording is permitted, together with the digital information, the digital information is converted into converted digital information of a predetermined number of predetermined bit rates, and the number of times of copy information is recorded in the on the recording media, Furthermore, the recording/playback control circuit, based on the copy control information detected by the control detection circuit, controlling the non-reproducible operation of the non-reproducible circuit and the update operation of the copy number information update circuit, When the copy control information of the digital information or the converted digital information reproduced from the recording medium indicates that re-recording is not permitted, and the digital information or the converted digital information is transferred to a device connected to When the other recording medium of the recording device on the reproducing device is moved, After the allowable number of times is reduced by the copy count update circuit, the copy count information is updated, and the digital information is rewritten by the recording circuit into recreated digital information having the same content as the digital information, and the rewritten The created digital information or the converted digital information, the copy control information and the copy count information are recorded on the recording medium again, and at the same time, the reproduced digital information or the converted digital information is reproduced by the non-reproducible circuit Cannot be reproduced again. 12. The digital information recording and reproducing apparatus according to claim 11, wherein: The recording/playback control circuit converts to a recordable bit rate of the other recording medium included in the recording device. 13. The digital information recording and reproducing apparatus according to claim 12, wherein: The recording device may mount the other recording medium having one or more different formats. 14. The digital information recording and reproducing apparatus according to claim 11, wherein: The recording circuit encrypts the digital information or the converted digital information and records it on the recording medium, The reproduction circuit decrypts and outputs the encrypted digital information or the converted digital information reproduced from the recording medium. 15. The digital information recording and reproducing apparatus according to claim 14, wherein: The recording circuit and the reproduction circuit use the copy count information as a kind of key. 16. The digital information recording and reproducing apparatus according to claim 13, wherein: The recording and reproducing control circuit may select one or more other recording media as moving objects of the digital information for the user in advance, and the selected other recording media may be converted to a recordable bit rate. 17. The digital information recording and reproducing apparatus according to claim 13, wherein: For each of the digital information, the movable object of the digital information recorded on the recording medium is displayed to the user, so that the other recording medium as the moving object can be selected. 18. The digital information recording and reproducing apparatus according to claim 13, wherein: The number of times of copying information is displayed to the user for each of the digital information as the number of possible transfers of the digital information recorded on the recording medium. 19. A digital information recording and reproducing device for recording and reproducing digital information including image information or audio information on a recording medium, characterized in that: In the digital information, copy control information indicating whether to allow the digital information to be recorded on the recording medium is included, have: A recording circuit that performs prescribed processing on the digital information and records it, A playback circuit that performs predetermined processing on the digital information and outputs it, a control detection loop for detecting said copy control information from said digital information, an unreproducible circuit for making at least a part of the digital information recorded on the recording medium unreproducible, a copy count information updating circuit for updating copy count information indicating a predetermined allowable count of copy to the recording medium of the digital information, and a recording and reproduction control circuit for controlling a reproduction operation of the reproduction circuit and a recording operation of the recording circuit based on a detection result detected by the detection circuit, the recording and reproduction control loop controls the recording loop, When the copy control information indicates that only one generation of recording is allowed, record the digital information and the number of times of copy information on the recording medium, Furthermore, the recording/playback control circuit, based on the copy control information detected by the control detection circuit and the number of times of copying information reproduced, controlling the non-reproducible operation of the non-reproducible circuit and the update operation of the copy number information update circuit, When the copy control information reproduced from the recording medium indicates that further recording is not permitted and the digital information is moved to the other recording medium having a recording device connected to the reproduction device , through the copy count update circuit, after reducing the allowable count, update the copy count information, rewrite the digital information into recreated digital information having the same content as the digital information through the recording circuit, and The recreated digital information and the updated copy number information are recorded on the recording medium, and at the same time, the reproduced digital information cannot be reproduced again through the non-reproducible circuit, The recording circuit encrypts the digital information and records it to the recording medium, the reproduction circuit decrypts and outputs the encrypted digital information reproduced from the recording medium, The recording circuit encrypts the regenerated digital information with a key different from that of the encrypted digital information reproduced by the reproduction circuit, and records it on the recording medium. 20. The digital information recording and reproducing apparatus according to claim 19, wherein the recording circuit and the reproducing circuit use the copy count information as a key. 21. The digital information recording and reproducing apparatus according to claim 19, wherein, as the number of transferable times of the digital information recorded on the recording medium, the number of times of copying is divided for each of the digital information. The information is displayed and communicated to the user.

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