JP2006352453A - Digital video recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital video recording device capable of performing dubbing by rapidly extracting only a copy free part when a copy once part and the copy free part coexist in a dubbing object title. <P>SOLUTION: A recording means includes a copy information recording means for recording copy information, which expresses whether whole data are the copy once data, whole data are the copy free data, or the copy once data and the copy free data coexist, in each one of M_VOB_GI, TM_ENT, and VOBU_ENT, which are the management information items, with respect to the MPEG data of the management object when the MPEG data is recorded in a first recording medium. A dubbing means copies only the MPEG data being the copy free data in a second recording medium, based on the copy information which is recorded respectively in the M_VOB_GI, the TM_ENT, and the VOBU_ENT. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a digital recording apparatus.

  In a recording device that records digital video on a large-capacity hard disk and saves the video that you want to retain on a removable medium such as a DVD, the part that records the input signal that can be recorded only once on the title to be dubbed (hereinafter referred to as copy-once section) And a part in which an input signal that can be copied any number of times (hereinafter referred to as a copy free part) is mixed, a technique is known in which only the copy free part is extracted and dubbed.

  Conventionally, the PES_scrambling_control flag recorded in the MPEG2 stream is checked to determine whether it is a copy-once part or a copy-free part from the MPEG2 stream. That is, if the PES_scrambling_control flag is sequentially checked from the beginning to the end of the MPEG2 stream, only the copy free part can be extracted and dubbed to a removable medium. However, with this method, it is necessary to check all MPEG 1 streams in the copy-once portion that cannot be dubbed, and processing takes time. Also, when all the target titles are recorded with copy-once, it is not possible to display to the user that dubbing is not possible until after checking all MPEG2 streams.

  An object of the present invention is to provide a digital recording apparatus capable of dubbing only a copy-free portion at a high speed when a copy-once portion and a copy-free portion are mixed in a dubbing target title.

  According to the first aspect of the present invention, the first recording medium, the second recording medium, the recording medium of any one of the first recording medium and the second recording medium obtained by encoding the input AV data And a dubbing means for copying the data recorded on the one recording medium to the other recording medium, the recording means records the data on the one recording medium. Is to record the management information on the one recording medium, and to the predetermined one or a plurality of management items in the management information, whether all of the data to be managed by the management item is copy-once or all Copy information recording means for recording copy information that indicates whether the copy is copy-free or whether copy-once and copy-free are mixed And dubbing means, based on the copy information recorded in the predetermined one or more management items, only the data is copy free, characterized in that copy to the other recording medium.

  The invention according to claim 2 is the invention according to claim 1, wherein copy information indicating that all are copy-free is first copy information, and copy information indicating that all is copy-once is second copy information. When the copy information indicating whether copy once and copy free are mixed is defined as the third copy information, the first management item, the second management item, and the first management item in the descending order of the hierarchy as the predetermined management items in the management information. There is a third management item, and the dubbing means determines whether the copy information recorded in the first management item is the first copy information, the second copy information, or the third copy information. When the copy information recorded in the first management item is determined to be the first copy information by the first determination unit and the first determination unit, the data to be managed by the first management item When the copy information recorded in the first management item by the means for copying to the recording medium and the first determination means is the second copy information, the other of the data to be managed by the first management item When the copy information recorded in the first management item is determined to be the third copy information by the means for prohibiting the copying to the recording medium and the first determination means, the second management in the first management item Second discrimination means for discriminating whether the copy information recorded in the second management item is first copy information, second copy information, or third copy information for each item. Means for copying all data to be managed by the second management item to the other recording medium when the copy information recorded in the second management item by the means is the first copy information; First When the discriminating means discriminates that the copy information recorded in the second management item is the second copy information, the copying of the data to be managed by the second management item to the other recording medium is prohibited. And when the copy information recorded in the second management item is the third copy information by the second determination unit, the third management item for each third management item in the second management item Is recorded in the third management item by the third determining means and the third determining means for determining whether the copy information recorded in the first copy information, the second copy information, or the third copy information. When it is determined that the copied copy information is the first copy information, the third determining unit copies all of the data to be managed by the third management item to the other recording medium, and the third determining unit performs the third determination. management Means for prohibiting copying of the data to be managed by the third management item to the other recording medium when it is determined that the copy information recorded in the item is the second copy information or the third copy information; It is characterized by having.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the copy information recording means records the copy information in an empty bit of the predetermined one or more management items in the management information. It is characterized by.

  According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the copy information recording means adds a copy information storage area to the predetermined one or more management items in the management information, and copies information Copy information is recorded in a storage area.

  According to the fifth aspect of the present invention, the first recording medium, the second recording medium, and the AV data to be input are MPEG-encoded to record any one of the first recording medium and the second recording medium. In a digital recording apparatus comprising recording means for recording on a medium and dubbing means for copying MPEG data recorded on the one recording medium to the other recording medium, the recording means records MPEG data on the one recording medium. In this case, the management information is recorded on the one recording medium in a format in accordance with the DVD-VR format, and M_VOB_GI, TM_ENT and VOBU_ENT in the management information are respectively recorded on the MPEG data to be managed. Whether everything is copy-once, everything is copy-free, Copy information recording means for recording copy information indicating whether P-once and copy-free are mixed is provided, and the dubbing means is copy-free based on the copy information recorded in each of M_VOB_GI, TM_ENT and VOBU_ENT. Only MPEG data is copied to the other recording medium.

  According to a sixth aspect of the present invention, in the fifth aspect of the invention, copy information indicating that all are copy free is first copy information, and copy information indicating that all are copy once is second copy information. If the copy information indicating whether copy once and copy free are mixed is defined as the third copy information, the dubbing means determines whether the copy information recorded in M_VOB_GI is the first copy information or the second copy information. If the copy information recorded in the M_VOB_GI is determined to be the first copy information by the first determination means for determining whether the copy information is the third copy information, the management target of the M_VOB_GI A means for copying certain MPEG data to the other recording medium, a copy recorded in M_VOB_GI by the first discrimination means When it is determined that the information is the second copy information, the copy information recorded in M_VOB_GI by the first determination unit, the means for prohibiting copying of the MPEG data to be managed by the M_VOB_GI to the other recording medium Is determined to be the third copy information, for each TM_ENT in the M_VOB_GI, whether the copy information recorded in TM_ENT is the first copy information, the second copy information, or the third copy information. If the second discriminating means discriminates whether the copy information recorded in TM_ENT is the first copy information by the second discriminating means or the second discriminating means, all the MPEG data to be managed by the TM_ENT The copy information recorded in TM_ENT by the means for copying to the other recording medium and the second discrimination means If it is determined that the copy information is two-copy information, the copy information recorded in TM_ENT by the second determination unit is prohibited from copying the MPEG data that is the management target of the TM_ENT to the other recording medium. If the copy information is determined to be copy information, the copy information recorded in VOBU_ENT is the first copy information, the second copy information, or the third copy information for each VOBU_ENT in the TM_ENT. When the third discriminating unit discriminates whether the copy information recorded in VOBU_ENT is the first copy information by the third discriminating unit, all the MPEG data managed by the VOBU_ENT Copying to the other recording medium, and the copy recorded in VOBU_ENT by the third discrimination means In the case where it is determined that the P information is the second copy information or the third copy information, there is provided means for prohibiting copying of the MPEG data to be managed by the VOBU_ENT to the other recording medium. And

  The invention according to claim 7 is the invention according to any one of claims 5 to 6, wherein the copy information recording means records the copy information in each empty bit of M_VOB_GI, TM_ENT and VOBU_ENT in the management information. To do.

  The invention according to claim 8 is the invention according to claims 5 to 6, wherein the copy information recording means adds a copy information storage area to each of M_VOB_GI, TM_ENT and VOBU_ENT in the management information, and Copy information is recorded.

  According to the present invention, when a copy-once portion and a copy-free portion are mixed in a title to be dubbed, only the copy-free portion can be extracted and dubbed at high speed.

  Embodiments of the present invention will be described below with reference to the drawings.

[1] Description of Configuration of Recording / Reproducing Device FIG. 1 shows a configuration of the recording / reproducing device.

  The recording / reproducing apparatus includes an input unit 1, a recording media unit 2, and an output unit 3. The input unit 1 includes a terrestrial analog tuner 11, an NTSC decoder 12, an audio A / D converter 13, and an MPEG encoder 14. The MPEG encoder 14 includes an MPEG video encoder 15, an MPEG audio encoder 16, a MUX (multiplexer) 17, and a buffer 18.

  The recording media unit 2 includes an HDD 21 and a DVD 22.

  The output unit 3 includes an MPEG decoder 31, an NTSC encoder 37, an audio D / A converter 38, and a TV 39. The MPEG decoder includes a DEMUX (demultiplexer) 32, a video buffer 33, an MPEG video decoder 34, an audio buffer 35, and an MPEG audio decoder 36.

  In the input unit 1, the video signal obtained by the terrestrial analog tuner 11 is NTSC-decoded by the NTSC decoder 12, sent to the MPEG video encoder 15 in the MPEG encoder 14, and encoded by the MPEG2 system. On the other hand, the audio signal obtained by the terrestrial analog tuner 11 is converted into a digital signal by the audio A / D converter 13 and then sent to the MPEG audio encoder 16 in the MPEG encoder 14 and encoded by the MPEG2 system. . The encoded video signal and audio signal are multiplexed by the MUX 17 and then sent to the recording media unit 2 via the buffer 18 and recorded on the HDD 21 or DVD 22.

  In the output unit 3, the MPEG data read from the recording media unit 2 is separated into a video signal and an audio signal by the DEMUX 32 in the MPEG decoder 31. The video signal obtained by the DEMUX 32 is sent to the MPEG video decoder 34 via the video buffer 33 and decoded, and then sent to the TV 39 via the NTSC encoder 37. The audio signal obtained by the DEMUX 32 is sent to the MPEG audio decoder 36 via the audio buffer 35 and decoded, and then sent to the TV 39 via the audio D / A converter 38.

  In this recording / reproducing apparatus, data recorded on the HDD 21 or DVD 22 in the recording medium unit 2 can be copied or moved bidirectionally by re-encoding dubbing or high-speed dubbing. In the re-encoding dubbing, after the data recorded on the HDD 21 or the DVD 22 is decoded by the MPEG decoder 31, the obtained data is encoded by the MPEG encoder 14 in the input unit 1, and the obtained MPEG data is stored in the HDD 21 or the DVD 22. To be recorded.

  In high-speed dubbing, data is directly copied or moved between the HDD 21 and the DVD 22 without going through the MPEG decoder 31 and the MPEG encoder 14. However, if the already recorded data consists of a copy-once part, only movement from the HDD to the DVD is permitted.

  In this embodiment, management information is recorded on the HDD 21 in a format according to the DVD-VR format. One video file is composed of one VOB (Video Object), and one VOB is composed of a plurality of VOBUs (Video Object Units). One VOBU is composed of a plurality of packs.

  FIG. 2 shows an outline of management information in the DVD-VR format.

(1) DVD-VR format management information RTR_VMG (Video Manager) includes the following information.
-RTR_VMGI (Video Manager Information): Management of the entire address information of RTR_VMG-M_AVFIT (Movie AV File Information Table): Management of Movie file information-S_AVFIT: Management of still image file information-ORG_PGCI: Management of information of original program (unit to be played) ・ UD_PGCIT: Management of playlist information ・ TXTDT_MG: Management of additional text information ・ MNFIT: Management of manufacturer information

(2) The M_AVFIT for managing movie file information is composed of the following information and the like.
M_AVFITI: Management of the end address of M_AVFIT, etc. M_AVFI: M_AVFI_GI and a plurality of M_VOBI (Movie Video Object Information). M_AVFI_GI manages the number of M_VOBI.

(3) The M_VOBI includes the following information.
・ M_VOBI_GI
・ TMAPI (Time MAP Information)
Each M_VOBI manages information as shown in Table 1.

  TMAPI consists of TMAP_GI, multiple TM_ENTs, and multiple VOBU_ENTs. TMAP_GI manages the number of TM_ENT, the number of VOBU_ENT, and the like. TM_ENT manages information as shown in Table 2, and VOBU_ENT manages information as shown in Table 3. TM_ENT is created every 10 seconds.

  This embodiment is characterized in that 2-bit copy information is stored in these management information. The copy information has values of 00b (all copy-free), 01b (all copy-once), and 10b (copy-free and copy-once mixed).

  The copy information is stored in M_VOB_GI, TM_ENT, and VOBU_ENT, respectively. As a storage method, two empty bits may be used, or one byte dedicated to copy information may be added. Here, as an example, a case where two free bits are used will be described. The copy information stored in M_VOB_GI is copy information in VOB units, the copy information stored in TM_ENT is copy information in TM_ENT units, and the copy information stored in VOBU_ENT is copy information in VOBU units. is there.

  In M_VOBI_GI, since a reserved area of 2 bits or more exists in VOB_TY (see Table 1), 2 bits in the area are used for recording copy information.

In TM_ENT, VOBU_ADR (see Table 2) takes a value of 32 bits, but even 30 bits can handle data sizes up to 2 TB, so the upper 2 bits are used for recording copy information.
In VOBU_ENT, the upper 1 bit of 1STREF_SZ (see Table 3) and the upper 1 bit of VOBU_SZ (see Table 3) are used for recording copy information. 1STREF_SZ can handle up to 256KB and VOBU_SZ up to 1MB. If the bit rate is about 10Mbps, it can be said that there is no practical problem.

  In this way, by using two free bits, it is possible to easily cope with each editing (scene deletion, title division, title combination) and dubbing of a playlist, which are the characteristics of the DVD-VR format.

  FIG. 3 shows an overall processing procedure when recording in units of M_VOB (Movie Video Object).

  CP_ONCE_VOB is a number for storing copy information in M_VOB units to be added to M_VOB_GI at the end of recording. CP_ONCE_CNT is a variable for storing the number of times that a copy-once input is detected while TM_ENT is recorded (10 seconds). CP_ONCE_FLG is a flag for storing whether or not a copy-once input is detected in an input signal check process described later.

  When recording is started, an initial value “3” is substituted into CP_ONCE_VOB (step S1). Also, “0” is substituted into CP_ONCE_CNT (step S2).

  Next, input signal check processing for checking copy information of the input signal and the like is performed for each video object unit (VOBU) (step S3). Details of this processing will be described later.

  Next, processing for adding copy information in units of VOBU_ENT to VOBU_ENT (copy information addition processing to VOBU_ENT) is performed (step S4). Details of this processing will be described later.

  Next, processing for adding TM_ENT unit copy information to TM_ENT (copy information addition processing to TM_ENT) is performed (step S5). Details of this processing will be described later.

  Next, a recording process for recording the MPEG stream on the HDD or the DVD is performed (step S6). Then, it is determined whether or not a recording end command has been input (step S7). If the recording end command has not been input, the process returns to step S3.

  If a recording end command has been input, the value of variable CP_ONCE_VOB is substituted into predetermined 2 bits (2 bits for recording copy information) of M_VOB_GI (step S8). That is, copy information is added to M_VOB_GI corresponding to M_VOB to be recorded. And this process is complete | finished.

  FIG. 4 shows a detailed processing procedure of step S3 (input signal check processing) in FIG.

  Copy information (copy once or copy free) of the input signal is acquired for each VOBU (step S11). If it is copy-once (YES in step S12), it is determined whether or not the variable CP_ONCE_VOB is “0” (step S13). Note that the initial setting value of the variable CP_ONCE_VOB is “3”.

  If the variable CP_ONCE_VOB is not “0”, it is determined whether or not the variable CP_ONCE_VOB is the initial setting value “3” (step S14). When the variable CP_ONCE_VOB is the initial setting value “3”, a value “1” indicating that all copies are copied is substituted into the variable CP_ONCE_VOB (step S15). Then, the process proceeds to step S17.

  If it is determined in step S14 that the variable CP_ONCE_VOB is not the initial setting value “3”, that is, if the variable CP_ONCE_VOB is “1” or “2”, it is not necessary to change the variable CP_ONCE_VOB. The process proceeds to step S17.

  If it is determined in step S13 that the variable CP_ONCE_VOB is “0”, it has already been confirmed that there is a copy-free VOBU in the recording target, so that the variable CP_ONCE_VOB includes copy-free and copy-once. A value “2” indicating the presence of both is substituted (step S16). Then, the process proceeds to step S17.

  In step S17, the value of the variable CP_ONCE_CNT is incremented by 1. Then, “1” indicating that the copy information acquired this time is copy once is substituted for the flag CP_ONCE_FLG (step S18). And it transfers to step 4 of FIG.

  If it is determined in step S12 that the copy is not copy-once, that is, if the copy is free, it is determined whether or not the variable CP_ONCE_VOB is "1" (step S19).

  If the variable CP_ONCE_VOB is not “1”, it is determined whether or not the variable CP_ONCE_VOB is the initial setting value “3” (step S20). When the variable CP_ONCE_VOB is the initial setting value “3”, a value “0” indicating that all of the variables CP_ONCE_VOB are copy-free is substituted (step S21). Then, the process proceeds to step S23.

  If it is determined in step S20 that the variable CP_ONCE_VOB is not the initial setting value “3”, that is, if the variable CP_ONCE_VOB is “0” or “2”, it is not necessary to change the variable CP_ONCE_VOB. Control goes to step S23.

  If it is determined in step S19 that the variable CP_ONCE_VOB is “1”, it has already been confirmed that a copy-once VOBU exists in the recording target, so that the variable CP_ONCE_VOB contains both copy-free and copy-once. A value “2” indicating that the image is present is substituted (step S22). Then, the process proceeds to step S23.

  In step S23, "0" indicating that the copy information acquired this time is copy free is substituted for the flag CP_ONCE_FLG. And it transfers to step 4 of FIG.

  FIG. 5 shows a detailed processing procedure of step S4 (processing for adding copy information to VOBU_ENT) in FIG.

  First, VOBU_ENT is acquired from the MPEG encoder 14 (step S21). It is determined whether CP_ONCE_FLG is 1 (step S22). If the flag CP_ONCE_FLG is 1, the VOBU corresponding to the acquired VOBU_ENT is copy-once. Therefore, “01b” indicating that all of the copy-once is set in predetermined 2 bits (2 bits for recording copy information) in VOBU_ENT ( Step S23). And it transfers to step S5 of FIG.

  If the flag CP_ONCE_FLG is 0, the VOBU corresponding to the acquired VOBU_ENT is copy-free. Therefore, the specified 2 bits (2 bits for recording copy information) in VOBU_ENT are all set to "00b" indicating that they are copy-free. (Step S24). And it transfers to step S5 of FIG.

  FIG. 6 shows a detailed processing procedure of step S5 (copy information addition processing to TM_ENT) of FIG.

  First, it is determined whether TM_ENT information can be acquired from the input signal currently input (step S31). If the TM_ENT information cannot be acquired, the process proceeds to step S6 in FIG.

  If it is determined that TM_ENT information can be acquired from the input signal currently input, TM_ENT is acquired from the MPEG encoder 14 (step S32). Then, it is determined whether or not the variable CP_ONCE_CNT is larger than 0 (step S33).

  If the variable CP_ONCE_CNT is 0, “00b” indicating that all the copies are free is set in predetermined 2 bits (2 bits for recording copy information) in TM_ENT (step S34). Then, the process proceeds to step S38.

  If it is determined in step S33 that the variable CP_ONCE_CNT is 1 or more, it is determined whether or not the variable CP_ONCE_CNT is a specified number (step S35). The specified number is the number of VOBU_ENT per TM_ENT. For example, in the case of an MPEG stream having 2 VOBU per second, there is one TM_ENT per 10 seconds, so the prescribed number is 20.

  When the variable CP_ONCE_CNT is a specified number, “01b” indicating that all the copies are once is set in predetermined 2 bits (2 bits for recording copy information) in TM_ENT (step S36). Then, the process proceeds to step S38.

  If it is determined in step S35 that the variable CP_ONCE_CNT is not the specified number, “10b” indicating that copy free and copy once are mixed in the predetermined 2 bits (2 bits for recording copy information) in TM_ENT. Set (step S37). Then, the process proceeds to step S38.

  In step S38, 0 is substituted into variable CP_ONCE_CNT. And it transfers to step S6 of FIG.

  FIG. 7 shows the overall processing procedure during dubbing.

  Here, dubbing includes both re-encoding dubbing and high-speed dubbing. It is determined whether or not the value of the copy information (2 bits) added to M_VOB_GI corresponding to M_VOB to be dubbed is “10b” (step S41). When the copy information (2 bits) added to M_VOB_GI is “10b”, it is determined that the VOBU constituting the dubbing target M_VOB includes copy free and copy once, and M_VOB A mixed dubbing process is performed (step S42). Details of this processing will be described later. And this process is complete | finished.

  If it is determined in step S41 that the copy information (2 bits) added to the M_VOB_GI is not “10b”, the copy information (2 bits) added to the M_VOB_GI is “00b”. It is discriminate | determined (step S43). When the copy information (2 bits) added to the M_VOB_GI is “00b”, all the VOBUs constituting the M_VOB to be dubbed are copy-free, so that the M_VOB to be dubbed All corresponding MPEG data is dubbed (step S44). And this process is complete | finished.

  If it is determined in step S43 that the value of the copy information (2 bits) added to the M_VOB_GI is not "00b", that is, the copy information (2 bits) added to the M_VOB_GI is In the case of “01b”, since all VOBUs constituting the M_VOB to be dubbed are copy-once, the current process is terminated without performing dubbing.

  FIG. 8 shows a detailed processing procedure of step S42 (M_VOB mixed dubbing processing) of FIG.

  First, 0 is substituted for the variable i (step S51). i is incremented by 1 (step S52). Next, it is determined whether or not the copy information (2 bits) added to TM_ENT # i is “10b” (step S53). When the copy information (2 bits) added to TM_ENT # i is "10b", it is judged that TM_ENT # i contains both copy-free VOBU and copy-once VOBU, and TM_ENT mixed dubbing processing Is performed (step S54). Details of this processing will be described later. Then, control goes to a step S57.

  If it is determined in step S53 that the copy information (2 bits) added to TM_ENT #i is not "10b", the copy information (2 bits) added to TM_ENT #i is "00b". Whether or not (step S55).

  When the copy information (2 bits) added to TM_ENT #i is "00b", that is, when all VOBUs included in TM_ENT #i are copy-free, TM_ENT #i All corresponding MPEG data is dubbed (step S56). Then, control goes to a step S57.

  If it is determined in step S55 that the copy information (2 bits) added to TM_ENT #i is not "00b", that is, the copy information (2 bits) is "01b" and is included in TM_ENT #i. If all the VOBUs that have been copied are copy-once, the process proceeds to step S57 without copying the MPEG data corresponding to TM_ENT # i.

  In step S57, it is determined whether i has reached the number of TM_ENTs in M_VOB. If i has not reached the number of TM_ENTs in M_VOB, the process returns to step S52. If i has reached the number of TM_ENTs in M_VOB, the current dubbing process is terminated.

  FIG. 9 shows a detailed processing procedure of step S54 (TM_ENT mixed dubbing processing) of FIG.

  First, 0 is substituted for variable j (step S61). j is incremented by 1 (step S62). Next, it is determined whether or not the copy information (2 bits) added to VOBU_ENT #j in TM_ENT #i is “00b” (step S63).

 If the copy information (2 bits) added to VOBU_ENT #j is "00b", it is determined that the VOBU in VOBU_ENT #j is copy free and all MPEG data corresponding to VOBU_ENT #j is dubbed. (Step S64). Then, the process proceeds to step S65.

  If it is determined in step S63 that the copy information (2 bits) added to VOBU_ENT #j is not "00b", that is, the copy information (2 bits) is "01b" and the VOBU in VOBU_ENT #j is The copy once is determined, and the process proceeds to step S65 without copying the MPEG data corresponding to VOBU_ENT #j.

  In step S65, it is determined whether j has reached the number of VOBU_ENTs in TM_ENT # i. If j has not reached the number of VOBU_ENT in TM_ENT #i, the process returns to step S62. If j has reached the number of VOBU_ENT in TM_ENT #i, the process proceeds to step S57 in FIG.

  FIG. 10 shows an example of management information to which copy information is added.

  Since the copy information added to M_VOBI # 1 is "1", M_VOB # 1 cannot be dubbed. Since the copy information added to M_VOBI # 3 is "0", all M_VOB # 3 can be dubbed.

  Since the copy information added to M_VOBI # 2 is "2", the copy information added to TM_ENT included in M_VOBI # 2 is checked. Since the copy information added to TM_ENT # 1 to # 2 is "0", MPEG data corresponding to these can be dubbed. Since the copy information added to TM_ENT # 4 to # 7 is "1", the MPEG data corresponding to these information cannot be dubbed.

  Since the copy information added to TM_ENT # 3 is “2”, VOBU_ENT included in TM_ENT # 3 is checked. Since the copy information added to VOBU_ENT # 1 to # 4 is "0", MPEG data corresponding to these can be dubbed. Since the copy information added to the VOBU_ENTs # 5 to # 9 is “1”, the MPEG data corresponding thereto cannot be dubbed. Even if a copy-free part and a copy-once part are mixed in VOBU_ENT, it can only be played back in units of VOBU. In this case, it is determined that the copy-once is a copy-once.

It is a block diagram which shows the structure of a recording / reproducing apparatus. It is a schematic diagram which shows the outline | summary of the management information of a DVD-VR format. It is a flowchart which shows the whole process sequence at the time of recording in M_VOB (Movie Video Object) unit. It is a flowchart which shows the detailed process sequence of step S3 (input signal check process) of FIG. 4 is a flowchart showing a detailed processing procedure of step S4 (processing for adding copy information to VOBU_ENT) in FIG. 4 is a flowchart showing a detailed processing procedure of step S5 (processing for adding copy information to TM_ENT) in FIG. It is a flowchart which shows the whole process sequence at the time of dubbing. It is a flowchart which shows the detailed process sequence of step S42 (M_VOB mixed dubbing process) of FIG. It is a flowchart which shows the detailed process sequence of step S54 (TM_ENT mixed dubbing process) of FIG. It is a schematic diagram which shows an example of the management information to which copy information is added.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Input part 2 Recording media part 3 Output part 11 Terrestrial analog tuner 12 NTSC decoder 13 Audio A / D converter 14 MPEG encoder 21 HDD
22 DVD
31 MPEG decoder 37 NTSC encoder 38 Audio D / A converter 39 TV

Claims (8)

First recording medium, second recording medium, recording means for encoding input AV data and recording the encoded AV data on one of the first recording medium and the second recording medium, and the one In a digital recording device comprising dubbing means for copying data recorded on the other recording medium to the other recording medium,
When recording the data on the one recording medium, the recording means records the management information on the one recording medium and manages the management item in one or more predetermined management items in the management information. For the target data, it is provided with copy information recording means for recording copy information indicating whether all are copy-once, all are copy-free, or whether copy-once and copy-free are mixed,
The digital recording apparatus, wherein the dubbing means copies only copy-free data to the other recording medium based on the copy information recorded in the predetermined one or more management items. Copy information indicating that all are copy free is first copy information, copy information indicating that all are copy once, second copy information, and copy information indicating whether copy once and copy free are mixed is third. When defined as copy information,
As the predetermined management items in the management information, there are a first management item, a second management item, and a third management item in descending order of hierarchy,
The dubbing means is
First discriminating means for discriminating whether the copy information recorded in the first management item is the first copy information, the second copy information, or the third copy information;
Means for copying the data to be managed by the first management item to the other recording medium when the copy information recorded in the first management item is the first copy information by the first determination means; ,
When it is determined that the copy information recorded in the first management item is the second copy information by the first determination means, the copy of the data to be managed by the first management item to the other recording medium is performed. Means to ban,
When it is determined that the copy information recorded in the first management item by the first determination unit is the third copy information, each second management item in the first management item is recorded in the second management item. A second discriminating means for discriminating whether the copied information is the first copy information, the second copy information or the third copy information;
When it is determined that the copy information recorded in the second management item is the first copy information by the second determination means, all of the data to be managed by the second management item is copied to the other recording medium. Means to
When it is determined that the copy information recorded in the second management item is the second copy information by the second determination unit, the data to be managed by the second management item is copied to the other recording medium. Means to ban,
When it is determined that the copy information recorded in the second management item is the third copy information by the second determination unit, the third management item in the second management item is recorded in the third management item. A third discriminating means for discriminating whether the copied copy information is first copy information, second copy information or third copy information;
When it is determined that the copy information recorded in the third management item is the first copy information by the third determination unit, all the data to be managed by the third management item is copied to the other recording medium. And the copy information recorded in the third management item by the third determination unit is the second copy information or the third copy information, the data of the management target of the third management item Means for prohibiting copying to the other recording medium;
The digital recording apparatus according to claim 1, further comprising: 3. The digital recording apparatus according to claim 1, wherein the copy information recording unit records the copy information in an empty bit of the predetermined one or more management items in the management information. The copy information recording means adds a copy information storage area to the predetermined one or a plurality of management items in the management information, and records the copy information in the copy information storage area. A digital recording device according to any one of the above. A first recording medium, a second recording medium, recording means for MPEG-encoding the input AV data and recording it on one of the first recording medium and the second recording medium; and In a digital recording apparatus provided with a dubbing means for copying MPEG data recorded on one recording medium to the other recording medium,
When recording the MPEG data on the one recording medium, the recording means records the management information on the one recording medium in a format in accordance with the DVD-VR format, and M_VOB_GI, TM_ENT and VOBU_ENT in the management information. Copy information recording means for recording copy information indicating whether copy-once, all copy-free, or copy-once and copy-free are mixed for each MPEG data to be managed With
The digital recording apparatus, wherein the dubbing means copies only copy-free MPEG data to the other recording medium based on copy information recorded in each of M_VOB_GI, TM_ENT and VOBU_ENT. Copy information indicating that all are copy free is first copy information, copy information indicating that all are copy once, second copy information, and copy information indicating whether copy once and copy free are mixed is third. When defined as copy information,
The dubbing means is
First determination means for determining whether the copy information recorded in M_VOB_GI is first copy information, second copy information, or third copy information;
Means for copying MPEG data, which is a management target of the M_VOB_GI, to the other recording medium when the copy information recorded in the M_VOB_GI is the first copy information by the first determination means;
Means for prohibiting copying of the MPEG data, which is a management target of the M_VOB_GI, to the other recording medium when the copy information recorded in the M_VOB_GI is the second copy information by the first determination means;
If it is determined by the first determination means that the copy information recorded in M_VOB_GI is the third copy information, whether the copy information recorded in TM_ENT is the first copy information for each TM_ENT in the M_VOB_GI. Second determination means for determining whether the copy information is second copy information or third copy information;
Means for copying all of the MPEG data to be managed by the TM_ENT to the other recording medium when the copy information recorded in the TM_ENT by the second determining means is determined to be the first copy information;
Means for prohibiting copying of the MPEG data to be managed by the TM_ENT to the other recording medium when the copy information recorded in the TM_ENT by the second determining means is determined to be the second copy information;
When the second determining means determines that the copy information recorded in TM_ENT is the third copy information, the copy information recorded in VOBU_ENT for each VOBU_ENT in the TM_ENT is the first copy information. Determining means for determining whether the copy information is second copy information or third copy information;
If the third discriminating means discriminates that the copy information recorded in VOBU_ENT is the first copy information, means for copying all of the MPEG data managed by the VOBU_ENT to the other recording medium; 3. When the discriminating means discriminates that the copy information recorded in VOBU_ENT is the second copy information or the third copy information, the copying of the MPEG data managed by the VOBU_ENT to the other recording medium is prohibited. Means to
The digital recording apparatus according to claim 5, further comprising: 7. The digital recording apparatus according to claim 5, wherein the copy information recording means records the copy information in each empty bit of M_VOB_GI, TM_ENT and VOBU_ENT in the management information. The copy information recording means adds a copy information storage area to each of M_VOB_GI, TM_ENT and VOBU_ENT in the management information, and records the copy information in the copy information storage area. Digital recording device.

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