JP2006344253A - Recording device and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To record a data stream, to which a copy control signal is added, in a copyright-protected form on a recording medium that does not have copyright-protection function. <P>SOLUTION: The data stream, to which the copy control signal is added, is recorded on the recording medium 9 having no copyright protection function, and the file management information, concerning the data stream, is recorded separately on a recording medium 10 having the copyright protection function. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a recording apparatus and a reproducing apparatus using a file management method for managing a plurality of media.

Digital broadcasting started in recent years has made it possible to provide high-quality and high-quality programs, so that users can enjoy high-quality and high-quality programs. However, using digital technology makes it easy to copy large quantities of high-quality and high-quality programs and distribute them to the Internet without image or sound quality degradation. There is a risk that acts that violate copyrights, such as duplicating programs and retransmitting them over the Internet, will occur frequently. Therefore, in digital terrestrial broadcasting and BS digital television broadcasting, in order to protect the copyright of content, it is possible to distribute the copy control signal in a form added to the broadcast program and record the broadcast program with the copy control signal added. The copyright is protected by limiting the recording medium to a recording medium having a copyright protection function.
JP-A-62-237538

  Therefore, the user cannot record the data with the copy control signal added to a recording medium that does not have a copyright protection function. A recording medium with a copyright protection function is generally more expensive than a recording medium that does not have a copyright protection function, so it can be said that the purpose is to protect copyright for general users who do not intend to make unauthorized copies. , Resulting in a financial burden.

  In order to solve the above-described problem, the present invention records a recording medium having one copyright protection function by combining a plurality of recording media having no copyright protection and a recording medium having one copyright protection function. A recording apparatus and a reproducing apparatus for managing a plurality of recording media that do not have copyright protection and recording or reproducing data having a copy control signal on a recording medium that does not have a copyright function while preventing unauthorized copying An object is to provide an apparatus.

  A recording apparatus according to the present invention includes a stream determination unit that detects the presence or absence of a copy control signal added to a data stream, and a recording medium determination unit that determines a recording medium having a copyright function and a recording medium having no copyright function. A medium identifier generating unit that generates an identifier for identifying the recording medium, a file management information generating unit that generates file management information of the data stream, and the data stream data stream does not have the copyright protection function. The recording medium includes a recording unit that records the file management information of the data stream on the recording medium having the copyright protection function. It is also desirable to record a file management information group for managing a file management information group of a plurality of data streams recorded on a plurality of recording media with a single recording medium.

  A playback apparatus according to the present invention includes a recording medium determination unit that determines a recording medium that records a data stream entity and does not have a copyright protection function and a recording medium that records a file management information group of the data stream and has a copyright protection function A management information determination unit for specifying file management information of the data stream from a group of file management information recorded on the recording medium having the copyright protection function, and a file determined by the management information determination unit A file management information reading unit for reading management information, a medium data reading unit for reading a data stream specified by the file management information reading unit and reading the file management information, and data read by the medium data reading unit A playback unit that plays back the stream, and data generated by the playback unit Those having an output unit for outputting to. If the file management information of the data stream recorded on the recording medium without the copyright protection function does not exist in the file management information group recorded on the recording medium with the copyright protection function, a message is displayed on the OSD. It is desirable to provide an OSD generation unit that generates a message for displaying the message.

  When recording a broadcast program or the like on a recording medium, two pieces of information are recorded on the same recording medium: data stream information in which the contents of the broadcast program are recorded and file management information for managing files arranged on the recording medium. The The file management information is information for managing where the data recorded on the recording medium is arranged on the recording medium. By using this information, the position, size, and size of the data recorded on the recording medium is used. You can know how.

  In other words, without this file management information, the data recorded on the recording medium cannot be found and the data cannot be reproduced.

In the recording apparatus of the present invention, a method is proposed in which data stream information and file management information indicating the position of the file are not recorded on the same recording medium, but are recorded on different recording media. Since the file management information indicating where the data stream information is recorded is not recorded together with the medium on which the data stream information is recorded, only the recording medium on which the data stream is recorded is recorded. It is not possible to specify where the data is recorded on the medium, and the stream cannot be read out only by the medium on which the data stream is recorded. Furthermore, by providing a function having copyright protection in either one of them, it is possible to indirectly provide both the data stream and the file management information with a copyright function.
Further, since the data size of the file management information itself is smaller than that of the data stream, the file management information for the data streams of a plurality of recording media can be recorded on the recording medium for recording the file management information. Since a recording medium with a copyright function is more expensive than a recording medium without it, it manages the file management information of a recording medium without a copyright protection function with a recording medium with a single copyright protection function. By doing so, it is possible to reduce the burden on the user's recording medium as a whole.

(Embodiment 1)
First, a method for managing the data stream and the file management information on different recording media will be described. FIG. 1 is a schematic diagram showing the contents of information for managing file management information of a plurality of recording media with a single recording medium. Reference numeral 1 denotes a recording medium on which a data stream is recorded, and reference numeral 2 denotes a recording medium on which file management information indicating the location of the data stream is recorded. 3 is a recording medium identifier for identifying the recording medium itself, and 4 is a recorded data stream. In the present invention, since the data stream and the file management information are recorded on different recording media, it is necessary to recognize the recording medium on which the file management information indicating the location of the data stream is recorded. Reference numeral 5 denotes a management medium identifier for identifying a medium in which file management information of the recorded data stream 4 is recorded.

  The recording medium 1 on which this data stream is recorded knows the recording medium on which its own file management information is recorded by searching for the recording medium identifier 3 having the same identifier as the management medium identifier 5 recorded there. Can do. Therefore, if the file management information is acquired from the recording medium 2, the location of the data stream can be known.

  The recording medium 2 on which file management information is recorded forms a file management information group 6 in order to be able to record file management information of a plurality of recording media. The file management information group 6 manages file management information of a plurality of recording media by managing the identifier 3 for identifying the recording medium in which the data stream is recorded and the file management information 61 as a pair.

  In order to obtain a data stream recorded using the method of managing a plurality of recording media with this single recording medium, first, a recording having a recording medium identifier 3 that matches the management information identifier 5 recorded in the recording medium 1 The medium 2 is searched for and the file management information group 6 possessed by the recording medium 2 is obtained. From the file management information 6, a recording medium identification that matches the recording medium identifier 3 recorded on the recording medium 1 is found, and file management information 61 recorded in a pair with it is obtained. By using the file management information 61 obtained here, the location of the data stream of the recording medium 1 can be known, and the data stream can be acquired.

(Recording device)
Next, a recording apparatus having a method for recording the data stream and the file management information on different recording media will be described. FIG. 2 is a block diagram of a recording apparatus having a file management system for managing a plurality of media according to the present invention. Reference numeral 7 denotes an external input terminal, and reference numeral 8 denotes a stream determination unit that determines whether a copy control signal is added to the data stream input from the external input terminal 7. 9 is a recording medium having no copyright protection function, and 10 is a recording medium having a copyright function. Reference numeral 11 denotes a recording medium determination unit that determines whether the recording medium mounted on the device has the characteristics of the recording media 9 and 10. Reference numeral 12 denotes a file management information generation unit that generates management information of a data stream to be recorded on the recording medium 9. The file management information generating unit 12 also serves as a medium identifier generating unit that generates an identifier for identifying the recording media 9 and 10. A recording unit 13 records information on the recording media 9 and 10 based on the method of managing the data stream, the file management information, and the recording medium identifier in different recording media.

  Next, an outline of the operation of a recording apparatus having a file management method for managing a plurality of media will be described.

  FIG. 3 shows an operation flow when a data stream to which a copy control signal is added is recorded on a plurality of media.

  First, processing for recording data streams on a plurality of media is started. Then, the data stream input from the external input terminal 1 is acquired (step 1), and the stream determination unit 8 determines whether the acquired stream has a copy control signal added (step 2). If no copy control signal is added, the process is terminated. If a copy control signal has been added, the recording medium discriminating unit 11 that determines the medium characteristics determines the combination of the recording medium characteristics attached to the recording apparatus (step 3). If it is determined that each of the mounted recording media is not a combination of the recording media 9 and 10, the process is terminated. When it is determined that each mounted recording medium is a combination of the recording media 9 and 10, the file management information generating unit 12 generates an identifier 3 for identifying each recording medium (step 4). Next, the file management information generation unit 12 generates file management information necessary for recording the data stream input from the input terminal 7 on the recording medium 9 (step 5).

  The recording unit 13 records the data stream 4 arranged based on the file management information created by the file management information generation unit 12 on the recording medium 9, the identifier 3 indicating the recording medium itself, and the file management information of the data stream. The identifier 5 of the recording medium being recorded is recorded (step 6).

  Further, on the recording medium 10, the recording unit 13 records the file management information group 6 including the file management information of the data stream recorded on the recording medium 9 and the identifier 3 indicating the recording medium itself (step 6), and ends the processing. .

  As described above, a file management method for managing a plurality of media is realized by a recording apparatus that performs these operations.

(Playback device)
Next, a description will be given of a playback apparatus that reads data in which data entities and management information are recorded on different recording media using a file management method for managing a plurality of media. FIG. 4 is a block diagram of a playback unit of an apparatus having a file management method for managing a plurality of media according to the present invention.

  Reference numeral 14 denotes a recording medium determination unit that determines whether the recording medium mounted on the playback device has the characteristics of the recording media 9 and 10, and 15 reads data from the recording media 9 and 10 mounted on the playback device. A data reading unit 16 is a management information judging unit 16 for judging whether the file management information of the data stream recorded on the recording medium 9 is recorded on the recording medium 10. 17 is a file management information reading unit that acquires the position of the data stream based on the file management information recorded on the recording medium 9, 18 is a playback unit for playing back the data stream, and 19 is the playback unit 18. This is an external output terminal for outputting data output from the outside. Reference numeral 20 denotes an OSD generation unit that outputs information based on information determined by the management information determination unit 16, and reference numeral 21 denotes an OSD output terminal for outputting information generated by the OSD generation unit 20.

  Next, an outline of the operation of a playback apparatus having a file management system for managing a plurality of media will be described.

  FIG. 5 shows an operation flow when the data stream is reproduced when the data stream and the file management information are recorded on different recording media.

  First, a process of reproducing a data stream in which a data stream and file management information are recorded on different recording media is started. The recording medium discriminating unit 14 determines whether the recording medium attached to the reproducing apparatus is a combination of the recording medium 9 having the copyright protection function and the recording medium 10 having no copyright protection function (step 11). If it is not a combination of the recording media 9 and 10, the process is terminated. In the case of the combination of the recording media 9 and 10, the management information determination unit 16 determines whether the file management information of the data stream recorded on the recording medium 1 exists in the recording medium 10 (step 12).

  If there is no file management information, an OSD indicating that fact is displayed (step 15), and the process is terminated. If the file management information exists, the file management information reading unit 17 acquires the position of the data stream based on the management information. The medium data reading unit 15 reads the data stream of the recording medium 9 using the position of the acquired data stream (step 13), and the reproducing unit 18 reproduces the data stream (step 14), and the processing is ended.

  As described above, reproduction of a data stream of a medium in which file management information and a data stream are separately recorded is realized by a reproduction apparatus that performs these operations.

  In the present invention, when a recording medium that cannot be removed from the recording / reproducing device is used instead of the recording medium 10 having copyright protection, the recording medium cannot be removed even if the recording medium does not have a copyright protection function. Since unauthorized copying cannot be performed, it is handled in the same manner as a recording medium having copyright protection.

  The apparatus having a file management system for managing a plurality of media according to the present invention has a copyright protection function for file management information of a data stream to which a copy control signal recorded on a plurality of recording media not having a copyright protection function is added. It is possible to prevent copyright infringement due to unauthorized copying by recording and managing in a recording medium having In addition, since it becomes possible to record a data stream to which a copy control signal is added to an existing recording medium that does not have a copyright protection function, it is effective in the copyright protection field and the recording medium field.

Overview of management method for managing file management information for multiple media on a single medium Block diagram of a recording apparatus having a file management system for managing multiple media Operation flow diagram for recording data stream and file management information on different media Block diagram of a playback device having a file management method for managing multiple media Operation flow diagram for reproducing a data stream in which a data stream and file management information are recorded on different media

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recording medium in which data is recorded 2 Recording medium in which file management information is recorded 3 Recording medium identifier 4 Data stream 5 Management medium identifier
6 File management information group 7 Stream input unit 8 Stream discrimination unit 9 Recording medium without copyright protection 10 Recording medium with copyright protection 11 Recording medium judgment unit 12 File management information generation unit 13 Recording unit 14 Recording medium discrimination unit DESCRIPTION OF SYMBOLS 15 Medium data reading part 16 Management information discrimination | determination part 17 File management information reading part 18 Playback part 19 Stream output 20 OSD production | generation part 21 OSD output part 61 File management information

Claims (4)

A stream discriminating unit for detecting the presence or absence of a copy control signal added to a data stream, a recording medium discriminating unit for discriminating a recording medium having a copyright function and a recording medium having no copyright function, and identifying the recording medium A medium identifier generating unit that generates an identifier to be generated; a file management information generating unit that generates file management information of the data stream; and a data stream of the data stream on a recording medium that does not have the copyright protection function. A recording apparatus comprising: a recording unit that records the file management information on the recording medium having the copyright protection function. The recording apparatus according to claim 1, wherein a file management information group for managing a file management information group of a plurality of data streams recorded on a plurality of recording media by a single recording medium is recorded. A recording medium determination unit for determining a recording medium having a copyright protection function in which a data stream entity is recorded, a recording medium having no copyright protection function, and a file management information group of the data stream; and a file in the data stream A management information determination unit for specifying management information from a group of file management information recorded on the recording medium having the copyright protection function, and file management information for reading the file management information determined by the management information determination unit A reading unit, a medium data reading unit that reads the data stream specified by the file management information reading unit and reads the file management information, and a reproducing unit that reproduces the data stream read by the medium data reading unit; An output unit for outputting the data generated by the playback unit to the outside Playback apparatus according to claim that there were example. When the file management information of the data stream recorded on the recording medium not having the copyright protection function does not exist in the file management information group recorded on the recording medium having the copyright protection function, a message is displayed on the OSD. The playback apparatus according to claim 3, further comprising an OSD generation unit that generates a message for display.

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