JP5006434B2 - Content management device - Google Patents

Description

  The present invention relates to a content management apparatus that manages reproduction of content after the content has been moved.

  In recent years, digital video recorders that receive analog television (SDTV) broadcast signals, digitize them, compress them, and record them on an optical disk such as a hard disk (HDD) or DVD-RAM have become widespread. Further, digital video recorders capable of recording satellite wave and terrestrial digital high-definition television (HDTV) broadcast signals have begun to be commercialized.

  Unlike analog TV broadcast signals, digital TV broadcast signals are characterized in that image quality and sound quality do not deteriorate even when copying is repeated. Therefore, it is important to establish a mechanism for preventing unauthorized copying in order to protect the copyright of the content. In a digital television broadcast signal, a copy control signal is multiplexed with a digital video / audio content, and a mechanism called copy-once that allows recording only once when a broadcast signal is received is introduced. As a result, the copyright of the content is protected.

  When the copy-once digital video / audio content is recorded on a recording medium such as an HDD or a DVD-RAM, the copy-once digital video / audio content is prohibited from being copied and rewritten to a control signal that cannot be copied at that time. However, it is allowed to move (move) the content from the recording medium (first recording medium) on which the content is recorded to another recording medium (second recording medium).

  For example, the “content copy management method, recording / playback apparatus, and playback apparatus” of Patent Document 1 has the same number of virtual contents as the number of rights that can be copied, moves the virtual contents during copying, and erases the virtual contents of the movement source To do. Furthermore, a technique is disclosed in which unauthorized duplication is not performed by increasing or decreasing the number of copy rights of the copy source and the copy destination by the number moved.

JP 2002-358241 A

  However, although it is permitted to move content from the first recording medium to the second recording medium, the content recorded on the first recording medium is processed so as not to be reproducible (reproduction is disabled). It is processed. For this reason, for example, when content is moved from a first recording medium to a second recording medium (for example, a memory card) in order to reproduce the content on a mobile terminal, the quality of the content such as image quality is deteriorated and moved. Only low-quality content can be played. Therefore, high-quality content before the move can be played back, and in order to protect the copyright of the content, the content before the move and the content after the move cannot be played back simultaneously, so that the copyright of the content cannot be played back. It is conceivable that a technique for managing the content and the content after the move is provided.

  By the way, for the purpose of reducing the capacity of content stored in the second recording medium, the user may want to move only a part of the content. For example, when moving the contents of a television program, the user may want to move except the CM portion. However, conventionally, it is possible to reproduce the content before the move, and it is impossible to simultaneously reproduce a part of the content before the move (partial content) and a part of the content after the move. Thus, there is no method for managing the content before the move and the content after the move. Therefore, it is desired to provide such a method. In addition, when a part of the content is moved, there is no method for continuously reproducing the content of the part that is the object of movement and the content of the part that is not the object of movement in the original order. Therefore, it is desired to provide such a method.

  In view of the above problems, an object of the present invention is to provide a content management apparatus that outputs partial content that is a part of content and prevents the output source partial content and the output destination partial content from being played back simultaneously. And

In order to solve the above problems and achieve the above object, a content management apparatus according to the present invention stores a part of data of copyright-managed content recorded on a first recording medium in a second recording medium. Conversion means for converting to data for recording on a medium, output means for outputting the converted data to the second recording medium, and the data before conversion remain on the first recording medium and, when the output unit outputs the data after the conversion into the second recording medium, of the content recorded on the first recording medium, as data before the conversion can not be reproduced And a reproduction controller for processing the data before conversion.

  In addition, the playback controller may be configured not to be able to play back the data by preventing the data before conversion from being read from the first recording medium.

  In addition, the content management apparatus further includes an acquisition unit that acquires the converted data from the second recording medium, and the reproduction controller has the data before the conversion remaining on the first recording medium. If the acquisition unit acquires the converted data from the second recording medium, the pre-conversion data recorded on the first recording medium is stored. The data before conversion may be processed so that it can be played back by the device itself.

  In addition, when the reproduction controller processes the pre-conversion data recorded on the first recording medium so that the data can be reproduced on its own device, the post-conversion data recorded on the second recording medium The converted data may be processed so that the data cannot be reproduced.

  The content management apparatus of the present invention is an apparatus for managing the reproduction of the content after a part of the content recorded on the first recording medium is output to the second recording medium. Output means for outputting a part of the content recorded on the recording medium to the second recording medium, and when the output means outputs a part of the content, the output means is recorded on the first recording medium. Replay disable means for disabling a part of the content, a pre-output identifier as an identifier for the part of the content recorded on the first recording medium, and processing performed by the output means An identifier assigning means for assigning a post-output identifier as an identifier to a part of the content recorded on the second recording medium; a medium identifier obtaining means for obtaining an identifier of the recording medium; When the output unit outputs a part of the content, the identifier of the first recording medium and the identifier of the second recording medium acquired by the medium identifier acquisition unit, the identifier before output, and the after output When the storage means for storing an identifier and the output means output a part of the content, the pre-output identifier is recorded on the first recording medium and the post-output on the second recording medium Control means for controlling the identifier to be recorded; content identifier obtaining means for obtaining the identifier of the content; and after the output means outputs a part of the content, the medium identifier obtaining means performs the first recording. An identifier of the medium and an identifier of the second recording medium are acquired, and the content identifier acquisition unit acquires the previous identifier from the first recording medium. A playback unit that plays back the content when the pre-output identifier is acquired, the post-output identifier is acquired from the second recording medium, and each acquired identifier is stored in the storage unit; Good.

  In the content management apparatus of the present invention, the identifier of the first recording medium and the identifier of the second recording medium are not only stored in the storage unit, but are also recorded in the first recording medium. When the pre-output identifier, which is a partial identifier of content, and the post-output identifier, which is a partial identifier of the content recorded on the second recording medium, are stored in the storage unit , Play the content. That is, the content management apparatus of the present invention manages not only the identifier of the first recording medium and the identifier of the second recording medium but also the pre-output identifier and the post-output identifier that are content identifiers. Even when a part of the content is moved to the second recording medium, the entire content can be continuously reproduced in order.

  The content management apparatus of the present invention further includes identifier generation means for generating the pre-output identifier and the post-output identifier, and the identifier providing means is a part of the content recorded on the first recording medium. The pre-output identifier generated by the identifier generation unit is added to the content, and the post-output identifier generated by the identifier generation unit is added to a part of the content recorded on the second recording medium. Good.

  In addition, the identifier assigning unit further assigns a remaining part identifier as an identifier to the remaining part of the content, and the storage unit further stores the remaining part identifier when the output unit outputs a part of the content. The control means further controls the remaining identifier to be recorded on the first recording medium when the output means outputs a part of the content, and the reproducing means includes the output means After outputting a part of the content, when the remaining identifier is further acquired from the first recording medium by the content identifier acquiring unit, and the acquired remaining identifier is stored in the storage unit, It is preferable to play the content.

  Further, the storage means stores one or both of the leading edge position and the trailing edge position of a part of the content recorded on the first recording medium when the output means outputs a part of the content. Preferably, the reproduction means reproduces the content by using one or both of the leading end position and the terminal end position stored in the storage means.

  In addition, the playback unit may play back the content by playing back the remaining part of the content and playing back a part of the content disabled by the playback disabler.

  In addition, the playback unit may play back the content by playing back the remaining part of the content and playing back a part of the content output to the second recording medium.

  Further, the content management apparatus of the present invention is a medium that can rewrite data recorded on the first recording medium, and a medium on which the second recording medium can record data. Medium judging means for judging whether or not the data is recorded, the output means is a medium capable of rewriting data recorded on the first recording medium, and the second recording medium is data When the medium determining unit determines that the medium can be recorded, a part of the content recorded on the first recording medium may be output to the second recording medium.

  The storage unit may delete the stored information when the playback unit plays back the content.

  The content management apparatus of the present invention may further include an encryption unit that encrypts information stored in the storage unit, and a decryption unit that decrypts the information encrypted by the encryption unit. .

  In addition, the content management apparatus of the present invention further includes conversion means for converting the quality of a part of the content output by the output means, and the output means is one of the contents processed by the conversion means. May be output to the second recording medium.

  Further, the converting means may decode a part of the content disabled by the playback disable means based on an instruction from the outside, and convert the quality of the part of the content.

  In addition, when the content is a video signal, the conversion unit converts part or all of the compression method, bit rate, image size, and frame rate of the video signal, and when the content is an audio signal, A part or all of the audio signal compression method, bit rate, sampling number, and channel number may be converted.

  Furthermore, the present invention can be realized as a method using the characteristic configuration means of the content management apparatus of the present invention as a step, or as a program including these steps, or a CD-ROM or the like in which the program is stored. It can also be realized as a recording medium or an integrated circuit. The program can also be distributed via a transmission medium such as a communication network.

  The present invention can provide a content management apparatus that outputs partial content that is part of content and prevents the output source partial content and the output destination partial content from being played back simultaneously.

  According to the present invention, even when a part of digital video / audio content is recompressed and encoded to reduce the data rate or resolution and output (record) to an external recording medium, the output source partial content and the output destination partial content Are not reproduced at the same time, and the entire content can be reproduced with the original quality. In addition, since the original content can be restored any number of times, it is possible to start over even if the content recompression encoding fails.

1 is a diagram illustrating the appearance of a content management device 1 and a portable recording medium 2 according to Embodiment 1. FIG. 2 is a block diagram illustrating the configuration of a content management device 1 and a portable recording medium 2 according to Embodiment 1. FIG. 5 is a diagram for illustrating a partial move in the first embodiment. FIG. 4 is a first flowchart showing an operation of the content management apparatus 1 according to the first embodiment. 3 is a diagram illustrating content information according to Embodiment 1. FIG. 6 is a second flowchart showing the operation of the content management apparatus 1 according to the first embodiment. 6 is a block diagram illustrating configurations of a content management apparatus 100 and a portable recording medium 2 according to Embodiment 2. FIG. FIG. 10 is a diagram for explaining a partial move in a second embodiment. FIG. 6 is a block diagram illustrating the configuration of a content management apparatus 101 and a portable recording medium 2 according to a third embodiment. It is a figure for demonstrating all the moves. It is a figure for demonstrating the effect of a partial move again and a content management apparatus.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment 1)
First, the configuration of the content management apparatus 1 according to the first embodiment will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a diagram showing the appearance of the content management apparatus 1 and the portable recording medium 2 according to the first embodiment. The content management apparatus 1 is an apparatus that moves content to a disc-shaped portable recording medium 2 and reproduces the content. When the content management apparatus 1 moves the content to the portable recording medium 2, the content management device 1 does not delete the content but makes it possible to restore the content later and disables the reproduction. The portable recording medium 2 is an example of a second recording medium and is a medium on which content is recorded. In the first embodiment, the first recording medium is a content storage unit 13 described later, which is provided in the content management device 1.

  FIG. 2 is a block diagram showing the configuration of the content management device 1 and the portable recording medium 2. As shown in FIG. 2, the content management apparatus 1 includes a receiving unit 11, a control unit 12, a content storage unit 13, a determination unit 14, a conversion unit 15, an identifier generation unit 16, and an identifier assignment unit 17. The move processing unit 18, the reproduction disabling unit 19, the medium identifier acquisition unit 20, the management information storage unit 21, the content identifier acquisition unit 22, and the reproduction unit 23. The functions of the components constituting the content management apparatus 1 will be described together with the operations when the operation of the content management apparatus 1 is described later.

Next, the operation of the content management apparatus 1 according to the first embodiment will be described.
In the first embodiment, it is assumed that a digital signal such as a terrestrial digital broadcast signal has already been received by the reception unit 11 and has already been stored in the content storage unit 13 as the first content 111 by the control unit 12. The digital signal is assumed to be a signal to which a copy-once restriction is imposed and is a stream encoded by the MPEG2 system.

  In the first embodiment, it is assumed that the content management apparatus 1 moves a part of the first content 111 to the portable recording medium 2. Specifically, as shown in FIG. 3, the content T1 (“content Ta1”) when the first content 111 stored in the content storage unit 13 is divided into four contents T0 to T3. ) And the content T3 (may be described as “content Ta3”) are assumed to be moved to the portable recording medium 2.

  Thereafter, it is assumed that the content management apparatus 1 reproduces the entire first content 111.

(Partial move)
First, the case where the content T1 and the content T3 which are a part of the 1st content 111 are moved to the portable recording medium 2 is demonstrated using FIG. FIG. 4 is a flowchart showing each procedure when the content T1 and the content T3 are moved to the portable recording medium 2.

  Assume that the positions of the content T1 and the content T3 to be partially moved on the stream are as follows. That is, for the content T1, the start position is pi0 and the end position is po0, and for the content T3, the start position is pi1 and the end position is po1.

  The determination unit 14 reads the media information of the content storage unit 13 and the media information of the portable recording medium 2, and the content storage unit 13 and the portable recording medium 2 move the content stored in the content storage unit 13. It is determined whether the medium can be used (S1). For example, the determination unit 14 determines whether the content storage unit 13 and the portable recording medium 2 are recording media that can rewrite already recorded data. At the same time, the determination unit 14 determines whether the content storage unit 13 and the portable recording medium 2 are recording media having a mechanism for protecting copyright. Based on the two determination results, the determination unit 14 determines whether or not the content storage unit 13 and the portable recording medium 2 are media capable of moving content (S1). Specifically, when the content storage unit 13 is a write-once recording medium, data that has already been recorded cannot be erased, so the determination unit 14 cannot move the content. The medium is determined (No in S1). Further, when the portable recording medium 2 is a recording medium that can rewrite data like DVD + RW, but does not have a mechanism for protecting copyright, the determination unit 14 determines that the portable recording medium 2 is a content. Is determined to be a medium that cannot be moved (No in S1). When the determination unit 14 determines that the content storage unit 13 and the portable recording medium 2 are not media that can move the content (No in S1), the content management device 1 notifies the determination result to the outside. To finish the operation.

  On the other hand, when the determination unit 14 determines that the content storage unit 13 and the portable recording medium 2 are media that can move content (Yes in S1), each component of the content management device 1 The following operations are performed.

  The control unit 12 sequentially reads the stream from the start position pi0 to the end position po0 of the content T1 and the stream from the start position pi1 to the end position po1 of the content T3 stored in the content storage unit 13 (S2). .

  The conversion unit 15 performs conversion processing such as reducing the image quality and sound quality of the compression-coded content T1 and content T3 (S3). For example, the conversion unit 15 decodes the compression-encoded content T1 and content T3 into a baseband video signal and an audio signal, re-compresses and encodes the decoded video signal and audio signal according to the parameters, and after conversion Stream is generated (S3). Examples of parameters for video include information for specifying a compression method, an image size, a bit rate, a frame rate, and the like. As parameters for audio, information specifying a compression method, a bit rate, the number of samples, the number of channels, and the like can be given. Specifically, the first content 111 including the content T1 and the content T3 is an HDTV broadcast signal stream, the portable recording medium 2 is a DVD-RAM, and the conversion unit 15 converts the HDTV broadcast signal. When converting content into SDTV broadcast signal content, the conversion unit 15 performs the following operation. That is, the conversion unit 15 converts the image size of the video from the HD size (for example, 1920 × 1080 interlace) to the SD size (for example, 720 × 480 interlace), and is about 10 Mbps or less together with the audio signal. The bit rates of the content T1 and the content T3 are converted. For the audio signal, the conversion unit 15 converts the AAC format used in broadcasting, for example, to the AC-3 format. The parameters may be determined in advance or set by the user.

  Further, in the following, for simplification of description, as shown in FIG. 3, the content T1 and the content T3 that are to be moved and are not converted by the conversion unit 15, are converted into the pre-conversion content Ta1 and the pre-conversion content Ta3, respectively. Is written. In addition, the content T1 and the content T3 after being converted by the conversion unit 15 are referred to as a converted content Tb1 and a converted content Tb3, respectively.

  Note that, as described above, the conversion unit 15 may perform the conversion process so that the content compression method before conversion and the content compression method after conversion are different. The compression methods include MPEG1, MPEG2, MPEG4, H.264. H.264, a compression method such as DV compression is included.

  The identifier generation unit 16 generates an identifier “B0” as an identifier to be assigned to the unmoved content T0 stored in the content storage unit 13, and is assigned to the unmoved content T2 stored in the content storage unit 13. An identifier “B2” is generated as an identifier (S4). Further, the identifier generating unit 16 generates the identifier “C1” as the identifier given to the pre-conversion content Ta1, and the identifier “C3” as the identifier given to the pre-conversion content Ta3 (S4). Further, the identifier generation unit 16 generates an identifier “D1” as an identifier given to the converted content Tb1, and generates an identifier “D3” as an identifier given to the converted content Tb3 (S4).

  When the identifier generation unit 16 generates an identifier to be assigned to each content, information on the manufacturer that manufactured the content management device 1, information on the content management device 1 (for example, the serial number of the content management device 1), content conversion date and time Each identifier is generated using information such as a random number.

  As shown in FIG. 3, the identifier assigning unit 17 deletes the identifier A assigned to the first content 111 stored in the content storage unit 13, and assigns the identifier “B0” to the content T0 that is not moved. The identifier “B2” is assigned to the content T2 that is not moved (S4). Further, the identifier assigning unit 17 assigns the identifier “C1” to the pre-conversion content Ta1, and assigns the identifier “C3” to the pre-conversion content Ta3 (S4). Further, the identifier assigning unit 17 assigns the identifier “D1” to the converted content Tb1, and assigns the identifier “D3” to the converted content Tb3 (S4).

  The move processing unit 18 records the stream converted by the conversion unit 15, that is, the converted content Tb1 and the converted content Tb3 on the portable recording medium 2 (S5). At this time, the move processing unit 18 records the identifier “D1” of the converted content Tb1 and the identifier “D3” of the converted content Tb3 on the portable recording medium 2 by storing them in the stream (S5). . For example, the move processing unit 18 stores the identifier “D1” of the converted content Tb1 and the identifier “D3” of the converted content Tb3 in the user area in the stream. When the converted content Tb1 and the converted content Tb3 are recorded on the portable recording medium 2, the move processing unit 18 performs the recording process after performing the scramble process based on a mechanism for protecting the copyright such as CPRM. Do. At this time, the move processing unit 18 also scrambles the identifier “D1” and the identifier “D3”, and then stores them in the user area in the stream.

  When the move processing unit 18 records the converted content Tb1 and the converted content Tb3 on the portable recording medium 2, the playback disable unit 19 includes the pre-conversion content Ta1 and the pre-conversion content Ta3 stored in the content storage unit 13. Can be restored later (S5). For example, the playback disable unit 19 disables playback by encrypting the pre-conversion content Ta1 and the pre-conversion content Ta3 into invalid data. Alternatively, the reproduction disabler 19 assigns pointers to the start position pi0 and end position po0 of the pre-conversion content Ta1, and the start position pi1 and end position po1 of the pre-conversion content Ta3, and stores them in the content storage unit 13. When the first content 111 including the pre-conversion content Ta1 and the pre-conversion content Ta3 is reproduced, it is forcibly skipped from the start position pi0 of the pre-conversion content Ta1 to the end position po0, and the pre-conversion content Ta3 The pre-conversion content Ta1 and the pre-conversion content Ta3 are disabled to be reproduced so that the pre-conversion content Ta1 and the pre-conversion content Ta3 are not reproduced by forcibly skipping from the head position pi1 to the end position po1.

  The medium identifier acquisition unit 20 acquires the identifier of the recording medium (S6). Specifically, the medium identifier acquisition unit 20 acquires the medium identifier α that is the identifier from the content storage unit 13 and also acquires the medium identifier β that is the identifier from the portable recording medium 2 (S6).

  The control unit 12 acquires the file management information FA including information for specifying the position where the content T0, the pre-conversion content Ta1, the content T2, and the pre-conversion content Ta3 are stored on the content storage unit 13 (S7). ).

  Further, as shown in FIG. 5, the control unit 12 includes a medium identifier α, which is an identifier related to the content storage unit 13, an identifier “B0” of the content T0, an identifier “B2” of the content T2, and an identifier of the content Ta1 before conversion. “C1” and the identifier “C3” of the pre-conversion content Ta3 are associated with each other and stored in the management information storage unit 21 (S8). At that time, the control unit 12 manages the start position pi0 and end position po0 of the pre-conversion content Ta1 on the original stream, and the start position pi1 and end position po1 of the pre-conversion content Ta3 in association with the medium identifier α and the like. The information is stored in the information storage unit 21 (S8). Further, the control unit 12 stores the file management information FA in the management information storage unit 21 in association with the medium identifier α or the like (S8). Further, the control unit 12 deletes the file management information FA from the content storage unit 13.

  Further, the control unit 12 associates the medium identifier β, which is an identifier related to the portable recording medium 2, the identifier “D1” of the converted content Tb1, and the identifier “D3” of the converted content Tb3, and stores the management information The data is stored in the unit 21 (S8). Hereinafter, for simplicity of explanation, information stored in the management information storage unit 21 is referred to as “content information”.

(Reverse move and replay)
Next, after the converted content Tb1 and the converted content Tb3 that are part of the first content 111 are partially moved to the portable recording medium 2, the first content 111 is restored (reversely moved). The case of reproduction will be described with reference to FIG. FIG. 6 is a flowchart showing each procedure when the first content 111 is restored and reproduced after the converted content Tb1 and the converted content Tb3 are partially moved.

  Whether the determination unit 14 is a medium in which the content storage unit 13 and the portable recording medium 2 can reversely move the converted content Tb1 and the converted content Tb3 partially moved by the portable recording medium 2 It is determined whether or not (S11). For example, as in the case where the converted content Tb1 and the converted content Tb3 are partially moved to the portable recording medium 2, the determination unit 14 has already recorded the content storage unit 13 and the portable recording medium 2. It is determined whether or not the recording medium can rewrite existing data. At the same time, the determination unit 14 determines whether the content storage unit 13 and the portable recording medium 2 are recording media having a mechanism for protecting copyright. Based on the two determination results, the determination unit 14 determines whether or not the content storage unit 13 and the portable recording medium 2 are media that can be reversely moved (S11). When the determination unit 14 determines that the content storage unit 13 and the portable recording medium 2 are not media that can be moved backward (No in S11), the content management device 1 notifies the determination result to the outside. To finish the operation.

  On the other hand, when the determination unit 14 determines that the content storage unit 13 and the portable recording medium 2 are media that can be moved backward (Yes in S11), each component of the content management device 1 is as follows. Perform the operation.

  The medium identifier acquisition unit 20 acquires the identifier of the recording medium (S12). Specifically, the medium identifier acquisition unit 20 acquires a medium identifier α that is an identifier of the content storage unit 13 and also acquires a medium identifier β that is an identifier of the portable recording medium 2 (S12).

  The content identifier acquisition unit 22 receives the identifier “B0” of the content T0, the identifier “B2” of the content T2, the identifier “C1” of the content Ta1 before conversion, and the identifier “C3” of the content Ta3 before conversion from the content storage unit 13. Obtain (S13). Further, the content identifier acquisition unit 22 acquires the identifier “D1” of the converted content Tb1 and the identifier “D3” of the converted content Tb3 from the portable recording medium 2 (S13). Note that the pre-conversion content Ta1 and the pre-conversion content Ta3 are stored in the content storage unit 13 in a disabled state.

  The control unit 12 acquires the file management information FA from the content storage unit 13 (S14).

  The determination unit 14 is content information in which each identifier acquired by the medium identifier acquisition unit 20 and the content identifier acquisition unit 22 is stored in the management information storage unit 21 in order to determine whether the reverse move can be performed. (S15). Note that the determination unit 14 determines the start position pi0 and the end position po0 of the pre-conversion content Ta1 and the start position pi1 and the end position po1 of the pre-conversion content Ta3 in order to determine whether the reverse move can be performed. Do not use.

  When the determination unit 14 determines that all the identifiers acquired by the medium identifier acquisition unit 20 and the like are not included in the content information (No in S15), the content management device 1 notifies the determination result to the outside. To finish the operation.

  In contrast, when the determination unit 14 determines that all the identifiers acquired by the medium identifier acquisition unit 20 and the like are included in the content information stored in the management information storage unit 21 (Yes in S15). The control unit 12 stores the file management information FA in the content storage unit 13 again. The unreproducible part 19 uses the re-stored file management information FA, and is stored in the content storage part 13 in a state of being unreproducible and is a part of the first content 111 before conversion. The content Ta1 and the pre-conversion content Ta3 are restored (S16). For example, the reproduction disabler 19 restores the pre-conversion content Ta1 and the pre-conversion content Ta3 to a reproducible state by erasing the pointer stored in the content storage unit 13 or decrypting the encryption (S16). ). At the same time, the reproduction disabling unit 19 erases the converted content Tb1 and the converted content Tb3 stored in the portable recording medium 2.

  The reproduction unit 23 then stores the content T0, the pre-conversion content Ta1, the content T2, and the pre-conversion content Ta3 stored in the content storage unit 13 into the content T0, the pre-conversion content Ta1, the content T2, and the pre-conversion content Ta3. By playing back in this order, the first content 111 is played back (S16).

  In the embodiment described above, the conversion unit 15 performs conversion processing such as reducing the image quality and sound quality on the pre-conversion content Ta1 and the pre-conversion content Ta3. The pre-conversion content Ta1 and the pre-conversion content Ta3, which are a part of the first content 111, stored in the reproduction disabled state in the unit 13, are restored. However, the conversion unit 15 may not perform the conversion process. In this case, when the determination unit 14 determines that each piece of information acquired by the medium identifier acquisition unit 20 or the like is included in the content information stored in the management information storage unit 21, the move processing unit 18 The converted content Tb1 (which is not actually converted) and the converted content Tb3 (which is not actually converted) are acquired from the mold recording medium 2. Then, the reproduction unit 23 converts the content T0 and the content T2 stored in the content storage unit 13 and the converted content Tb1 and the converted content Tb3 acquired by the move processing unit 18 into the content T0 and the converted content Tb1. The first content 111 may be reproduced by reproducing the content T2 and the converted content Tb3 in this order.

  In this method, when the move processing unit 18 records the converted content Tb1 and the converted content Tb3 on the portable recording medium 2, the reproduction disabling unit 19 uses the pre-conversion content Ta1 stored in the content storage unit 13 and This is effective when the pre-conversion content Ta3 is deleted instead of being made unreproducible in a state where it can be restored later, and then the first content 111 is reproduced.

  The reproduction disable unit 19 may delete the pre-conversion content Ta1 and the pre-conversion content Ta3 stored in the content storage unit 13 instead of disabling the reproduction. In the case of deletion, the reproduction disabler 19 deletes, for example, the portion related to the pre-conversion content Ta1 and the pre-conversion content Ta3 in the file management information of the first content 111, thereby the pre-conversion content Ta1 and the pre-conversion content Ta3. May be deleted.

  The content information stored in the management information storage unit 21 includes the pre-conversion content Ta1 and pre-conversion content Ta3 stored in the content storage unit 13, and the post-conversion content stored in the portable recording medium 2. Information indicating which of Tb1 and converted content Tb3 is the original may be included.

  In Embodiment 1 described above, the content storage unit 13 is used as an example of the first recording medium. However, the first recording medium may not be provided in the content management apparatus 1. Similar to the portable recording medium 2, it may be a recording medium external to the content management apparatus 1. When the first recording medium is a DVD-R, since the DVD-R is a write-once recording medium, the determination unit 14 is a medium that cannot move the content stored in the first recording medium. It is determined that

  When the playback unit 23 plays back the first content 111, the playback disable unit 19 does not delete the converted content Tb1 and the converted content Tb3 stored in the portable recording medium 2, It may be disabled. For example, the reproduction disabling unit 19 moves the file management information of the converted content Tb1 and the converted content Tb3 to an area that the user cannot access. Alternatively, the reproduction disabler 19 encrypts the converted content Tb1 and the converted content Tb3. Thereby, the reproduction disabler 19 may disable the reproduction of the converted content Tb1 and the converted content Tb3 stored in the portable recording medium 2.

  Further, when the playback unit 23 plays back the first content 111, the control unit 12 may delete the content information stored in the management information storage unit 21.

  Further, the conversion unit 15 may decrypt the content that has been made unreproducible based on an external instruction such as a user instruction, and newly perform a conversion process on a part of the content. Thereby, even if the user fails to recompress and encode the content, the user can start over.

  In addition, the move processing unit 18 is used as an example of the output unit. However, if the portable recording medium 2 can record data by itself, the move processing unit 18 is replaced with a unit for outputting content. Also good.

(Embodiment 2)
Next, the content management apparatus 100 of Embodiment 2 is demonstrated using FIG.

  FIG. 7 is a block diagram illustrating a configuration of the content management apparatus 100 according to the second embodiment. The content management apparatus 100 according to the second embodiment is different from the content management apparatus 1 in that the content management apparatus 100 according to the second embodiment includes a content combining unit 50 that is not included in the content management apparatus 1 according to the first embodiment. Therefore, hereinafter, only the points of the content management apparatus 100 that are different from the content management apparatus 1 will be described.

(Partial move)
When the move processing unit 18 records the converted content Tb1 and the converted content Tb3 on the portable recording medium 2 as shown in FIG. 8, the content combining unit 50 and the content T0 stored in the content storage unit 13 The stream T02 is generated by combining the content T2. The content combining unit 50 combines the pre-conversion content Ta1 and the pre-conversion content Ta3 to generate a pre-conversion stream Ta13. Then, the content combination unit 50 records the combined stream T02 and pre-conversion stream Ta13 in the content storage unit 13. At that time, the content combining unit 50 deletes the first content 111 that is an original stream.

  The identifier generation unit 16 generates an identifier “B” as an identifier given to the stream T02 that is not moved, and an identifier “C” as an identifier given to the stream Ta13 before conversion to be moved. When the pre-conversion stream Ta13 is recorded on the portable recording medium 2, it is recorded as the post-conversion stream Tb13. Then, the identifier generation unit 16 generates an identifier “D” as an identifier given to the converted stream Tb13 after being moved. The identifier assigning unit 17 assigns the identifier “B” to the stream T02, assigns the identifier “C” to the stream Ta13 before conversion, and assigns the identifier “D” to the stream Tb13 after conversion.

  The move processing unit 18 records the converted stream Tb13 on the portable recording medium 2. At this time, the move processing unit 18 records the identifier “D” of the converted stream Tb13 in the portable recording medium 2 by storing it in the converted stream Tb13. For example, the move processing unit 18 stores the identifier “D” of the converted stream Tb13 in the user area in the converted stream Tb13.

  The playback disable unit 19 disables playback of the pre-conversion stream Ta13 generated by combining the pre-conversion content Ta1 and the pre-conversion content Ta3 that are partially moved as described in the first embodiment. To do.

  The control unit 12 associates the medium identifier α, which is an identifier related to the content storage unit 13, the identifier “B” of the stream T02 and the identifier “C” of the stream Ta13 before conversion, and stores them in the management information storage unit 21. At that time, the control unit 12 configures the pre-conversion content Ta1 and the pre-conversion content Ta3 of the pre-conversion content Ta1 and the pre-conversion content Ta1 and the pre-conversion content Ta3 of the pre-conversion stream Ta13 on the original stream. The start position pi1 and the end position po1 are stored in the management information storage unit 21 in association with the medium identifier α and the like. Further, the control unit 12 stores the file management information of the stream T02 and the stream Ta13 before conversion on the content storage unit 13 in the management information storage unit 21 in association with the medium identifier α and the like.

  Further, the control unit 12 associates the medium identifier β, which is an identifier related to the portable recording medium 2, and the identifier “D” of the converted stream Tb13 and stores them in the management information storage unit 21.

  The information stored in the management information storage unit 21 is “content information”.

(Reverse move and replay)
The medium identifier acquisition unit 20 acquires the identifier of the recording medium. That is, the medium identifier acquisition unit 20 acquires a medium identifier α that is an identifier of the content storage unit 13 and also acquires a medium identifier β that is an identifier of the portable recording medium 2.

  The content identifier acquisition unit 22 acquires the identifier “B” of the stream T02 and the identifier “C” of the stream Ta13 before conversion from the content storage unit 13. Further, the content identifier acquisition unit 22 acquires the identifier “D” of the converted stream Tb13 from the portable recording medium 2.

  The determination unit 14 includes all the identifiers acquired by the medium identifier acquisition unit 20 and the like in the content information stored in the management information storage unit 21 in order to determine whether the reverse move can be performed. It is determined whether or not.

  When the determination unit 14 determines that all the identifiers acquired by the medium identifier acquisition unit 20 and the like are included in the content information, the playback disable unit 19 stores the playback disabled state in the content storage unit 13. The pre-conversion stream Ta13 that is part of the first content 111 is restored.

  Based on the pointer information on the original stream, the reproducing unit 23 combines the respective contents in order of the content T0, the pre-conversion content Ta1, the content T2, and the pre-conversion content Ta3 to reproduce the first content. Content 111 is reproduced.

(Embodiment 3)
Next, the content management apparatus 101 of Embodiment 3 is demonstrated using FIG.

  FIG. 9 is a block diagram illustrating a configuration of the content management apparatus 101 according to the third embodiment. The content management apparatus 101 according to the third embodiment is different from the content management apparatus 1 only in that it includes an encryption processing unit 51 that is not included in the content management apparatus 1 according to the first embodiment. Therefore, hereinafter, only the difference of the content management apparatus 101 from the content management apparatus 1 will be described.

  In the first embodiment, when the move processing unit 18 records the converted content Tb1 and the converted content Tb3 on the portable recording medium 2, the control unit 12 stores the content information in the management information storage unit 21.

  On the other hand, in Embodiment 3, when the move processing unit 18 records the converted content Tb1 and the converted content Tb3 on the portable recording medium 2, the encryption processing unit 51 encrypts the content information, and the control unit 12 The content information encrypted by the encryption processing unit 51 is stored in the management information storage unit 21. During the reverse move process, the encryption processing unit 51 decrypts the encrypted content information, and passes the decrypted content information to the determination unit 14.

  The encryption processing unit 51 may encrypt only a part of the content information, for example, only the file management information.

  In the above-described embodiment, the case where the content management apparatus 1 moves a part of the first content 111 to the portable recording medium 2 has been described. The content management apparatus 1 can also move the entire first content 111 to the portable recording medium 2. In that case, as shown in FIG. 10, the content management apparatus 1 assigns the identifier “A” to the first content 111 and assigns the identifier “X” to the content recorded on the portable recording medium 2. During the reverse move and playback process, the content management device 1 stores the first content 111 or the portable recording medium 2 in the same manner as when playing the pre-conversion content Ta1 or the post-conversion content Tb1 corresponding to the pre-conversion content Ta1 shown in FIG. Play back the recorded content.

  Further, as shown in FIG. 11, the content management apparatus 1 moves a part of the first content 111 to the portable recording medium 2 and then moves a part of the content moved to the portable recording medium 2 to the portable type. Further movement to the recording medium 200 is possible. The content management apparatus 1 reproduces the entire content when the identifiers of the two contents as well as the identifiers of the two recording media are included in the content information stored in the management information storage unit 21. As described above, the content management apparatus 1 manages not only the identifier of the recording medium but also the identifier of the content.

  When managing only the identifier of the recording medium, if the contents Ta1 and Ta3 to which the identifiers “C1” and “C3” are assigned are the majority of the first contents 111, they are recorded on the portable recording medium 2. If the content Tc1 to which some identifiers “E” of the content Tb1 and Tb3 corresponding to the content Ta1 and Ta3 are assigned is deleted, the identifier “G” corresponding to the content Tc2 to which the remaining identifier “F” is assigned is obtained. The given content Td can be copied to the portable recording medium 200. However, as described above, the content management apparatus 1 manages not only the identifier of the recording medium but also the identifier of the content. Therefore, the problem that the content Td with the identifier “G” is copied to the portable recording medium 200 does not occur.

  The content management apparatus of the present invention receives digital video / audio data whose copyright is protected by a signal such as a digital television broadcast, records the data on a first recording medium such as an HDD, disables the reproduction, and stores the data as a second data. It is useful as a device for reproducing the data after being output to the recording medium.

DESCRIPTION OF SYMBOLS 1 Content management apparatus 2 Portable recording medium 11 Receiving part 12 Control part 13 Content memory | storage part 14 Judgment part 15 Conversion part 16 Identifier production | generation part 17 Identifier assignment part 18 Move process part 19 Reproduction | regeneration disabling part 20 Medium identifier acquisition part 21 Management information Storage unit 22 Content identifier acquisition unit 23 Playback unit

Claims (4)

Conversion means for converting a part of the copyright-managed content recorded on the first recording medium into data for recording on the second recording medium;
Output means for outputting the converted data to the second recording medium;
When the pre-conversion data remains on the first recording medium and the output means outputs the converted data to the second recording medium, the data is recorded on the first recording medium. and among the contents are such that said pre-conversion data can not be reproduced, the content management apparatus and a reproduction controller for processing on the pre-conversion data. The content management apparatus according to claim 1, wherein the playback controller prevents the data before conversion from being played back by preventing the data from being converted from being read from the first recording medium. The content management device further includes an acquisition unit that acquires the converted data from the second recording medium,
The reproduction controller is processed so that the data before conversion remains on the first recording medium and cannot be reproduced, and the acquisition unit acquires the converted data from the second recording medium. 3. The content management according to claim 1, wherein the pre-conversion data recorded in the first recording medium is processed with respect to the pre-conversion data so that the self-device can reproduce the pre-conversion data. apparatus. The reproduction controller reproduces the converted data recorded on the second recording medium when the pre-conversion data recorded on the first recording medium is processed so that it can be reproduced on its own device. The content management apparatus according to claim 3, wherein the converted data is processed so that it cannot be performed.

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