JP2006115214A - Recording apparatus, recording method, recording program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording apparatus and a recording method capable of recording automatically inserted chapters to a memory with a small capacity at a low cost with a recording format capable of high speed data searching. <P>SOLUTION: In the recording apparatus 100 and the recording method, a buffer control section 104 determines a corresponding division compression data size (VOB size) to which management information, generated by a navigation data generation / correction section 102, is to be inserted on the basis of recording bit rate information R or the like of compression data of AV data, and controls storage of the compression data with the VOB size for inserting the management information to a buffer memory section 103. A recording medium recording section 105 records the compression data with the VOB size to which the management information is inserted to the recording medium. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a recording apparatus, a recording method, a recording program, and a recording medium, and in particular, a recording for recording AV information such as music / audio or a moving image on a digital recording medium such as a DVD, CD, HDD, or the like. The present invention relates to an apparatus, a recording method, a recording program, and a recording medium.

  Digital recording media capable of recording and holding AV (Audio & Visual) information such as music, audio, and moving pictures, etc., as the recording capacity of digital recording media has increased and the price has been reduced based on recent technological evolution, and this kind of digital recording Devices for recording AV information on a medium and reproducing AV information recorded on a digital recording medium have come to be provided with high quality and low cost.

  In particular, recently, devices that record DVD (Digital Versatile Disk) and HDD (Hard Disk Drive) instead of VTR (Video Tape Recorder) that records AV information on an information recording tape are becoming widespread, and further increase in recording capacity. The aim is to develop Blu-ray Disc.

  Here, a recording format for recording or reproducing AV information will be described for a DVD.

  In the case of a DVD, since the device was originally developed as a read-only device, AV information is recorded on the DVD disc with a recording structure suitable for reproduction by the read-only device. Therefore, the recording structure of the DVD disc is such that when recording AV information on the DVD disc, all the recording information about the AV information to be recorded is prepared, and then all the recording information is recorded on the DVD disc. It has become. The recording format has been standardized (hereinafter abbreviated as the DVD video standard) and is still used for the recording structure of a read-only DVD disc.

  Later, when DVD discs (DVD-RW, DVD + RW, DVD-RAM, etc.) capable of recording AV information in real time and their corresponding devices are developed, recording that sequentially records AV information in real time corresponding to these DVD media The format has been standardized (hereinafter abbreviated as VR (Video-Recording) standard) and is used in DVD recording / reproducing devices and the like.

  By the way, when considering the convenience of the user, the recording format conforming to the DVD video standard so that the recorded DVD disk can be reproduced by the reproduction-only DVD player even if the DVD recording / reproducing apparatus conforms to the VR standard. Therefore, it has been desired to be able to record on a DVD disc.

  Therefore, in a DVD recording / reproducing device or the like according to the VR standard, an AV stream indicating compression information of audio and video itself is recorded in a recording format according to the DVD video standard, while information and file information regarding the AV stream are recorded. Management information is recorded in an intermediate state that can be converted to the DVD video standard, and after the recording of all the recorded information on the DVD disc is completed, a method for converting to the DVD video standard (finalizing process) has been developed. It is used in actual equipment.

  Here, the logical format of the DVD video standard standardized in “DVD Specifications for Read-Only Disc Part 3 VIDEO SPECIFICATIONS Version 1.0” and “Version 1.1 December 1997” will be described with reference to FIG.

  FIG. 2 is a configuration diagram showing the configuration of the video title.

  A VTS (Video Title Set) 201 including information such as sound, image, language, etc. included in one title is one or more VOBs (Video Object: Video A portion composed of one or more VOBs excluding control data in the VTS is referred to as a VOBS (Video Object Set) 212.

  In the DVD video standard, the VOB 211 is composed of one or more cells (not shown), and one cell is composed of one or more VOBUs. Here, for simplicity of explanation, it is assumed that the VOB 211 is composed of one cell, and the VOB 211 and the cell coincide with each other. In this case, one VOB 211 is composed of one or more VOBUs (Video Object Units) 221.

  One VOBU 221 is stipulated in the DVD video standard to have a video playback time length of 0.4 to 1.0 seconds. However, as an exception, the VOBU 221 located at the end of the VOB 211 is defined to have a video playback time length of 0.4 seconds or more and 1.2 seconds or less.

  One VOBU 221 includes an A pack (audio pack) in which audio data as audio information is stored in addition to a navigation pack (navigation pack) 231 in which management information related to playback information and search information of the VOBU 221 is stored. Pack) 232, a V pack (video pack) 233 storing video data as video information, and a sub-picture pack containing sub-picture data as sub-video information. In FIG. 2, the sub-picture pack is not shown.

  In this one VOBU 221, the navigation pack 231 is always present at the head, but the A pack 232, the V pack 233, and the sub-picture pack are not necessarily present in the VOBU 221. The number and order can be arbitrarily set.

  In addition, video data of all V packs included in one VOBU 221 is composed of one or more GOPs (Group Of Picture). That is, one VOBU 221 constituting an AV stream (audio stream and video stream) is composed of an integer number of GOPs.

  The navigation pack 231 is positioned at the head of the VOBU 221 in units of 2 kbytes, for example, for the compressed stream of the AV stream.

  The navigation pack 231 includes a packet header 241, a system header 242, a PCI (Presentation Control Information) header 243, and a DSI (Data Search Information) header 244 in order from the top.

  The packet header 241 includes an identification code (Pack start Code) for identifying the beginning of the packet, that is, a pack, time information (System Clock Reference: SCR) indicating timing inputted to the decoder, and data transfer of the compressed stream Stores the rate (program mux rate).

  The system header 242 stores the number of audio streams, the number of video streams, the decoder buffer memory size necessary for decoding, and the like included in the VOBU 221.

  The PCI header 243 stores playback control information of the VOBU 221 such as the head recording address (NV PCK LBN), playback start time information (VOBU S PTM), playback end time information (VOBU E PTM), and the like.

  Also, in the DSI header 244, the reference frame address (VOBU STREF EA, VOBU 2NDREF EA, VOBU 3RDREF EA) included in this VOBU 221, playback start time information (VOB S PTM) of the VOB 211 to which this VOBU 221 belongs, and playback Search such as end time information (VOB E PTM), address information (FWDI, BWDI) of other VOBUs 221 to be reproduced within a maximum range of about 2 minutes from the reproduction start time of the VOB unit 221 in order to search this VOBU 221 Management information is stored.

  As described above, in the DVD video standard, time information on the reproduction time axis of the AV stream that has been recorded in advance and recording position information on the DVD disc (such as fast-forward reproduction by high-speed data search) can be easily realized. Based on the address information), it is stipulated that future time information and position information be recorded in the DSI header 244 constituting the navigation pack 231 of the AV stream. Specifically, as the future time information, the playback end time information on the playback time axis of the AV stream of the VOB 211 to which the VOBU 221 belongs, as the position information of the future, a maximum of 2 minutes from the playback start time of the VOBU 221 ( It is stipulated that address information of another VOBU 221 to be reproduced within a range after 120 seconds) is recorded.

  For this reason, a major problem for recording an AV stream of the DVD video standard in real time is that the DSI header 244 of the Navipack 231 has a maximum 120 times from the playback end time information of the VOB 211 to which the VOBU 221 belongs and the playback start time of the VOBU 221. Future time information and position information such as address information of other VOBUs 221 to be reproduced within a range after 2 seconds must be included, and these information is recorded in the DSI header 244 of the navigation pack 231 of the VOBU 221. It is necessary.

  In order to solve this problem, “Information recording apparatus, information recording method, and information recording medium on which recording control program is recorded” disclosed in Japanese Patent Application Laid-Open No. 2002-56609 receives video signals (video data) at a constant data rate. By adopting fixed bit rate recording using a fixed-rate encoding method that performs compression encoding, the VOBU playback time is constant, the VOBU size is constant, and the number of VOBUs included in the VOB is constant. As a result, the recording end information of the VOBU to which the VOBU to which the VOBU belongs and the recording position information of other VOBUs to be reproduced up to 120 sec ahead from the playback start time of the VOBU, which are future information that must be written in the navigation pack. Is solved by fixing.

  However, this method is more difficult to encode than variable bit rate recording using a variable rate encoding method in which the video signal (video data) is compression encoded at a variable data rate corresponding to each scene of the video signal. It is necessary to use fixed bit rate recording that causes poor recording quality even in high scenes. When recording is stopped, all VOBUs included in a predetermined VOB must be recorded and cannot be stopped immediately. There was a problem.

  On the other hand, “Recording apparatus and recording method” described in Japanese Patent Application Laid-Open No. 2002-335495 prepares a large recording buffer memory into which all one VOB is stored, and configures the VOB when the VOB is accumulated in the recording buffer memory This problem is solved by generating a navigation pack for each VOBU from the attribute information of the VOBU to be recorded, inserting the generated navigation pack at the head of each VOBU, and then recording it on the medium.

  Here, the minimum memory size of the recording buffer memory described in Japanese Patent Application Laid-Open No. 2002-335495, which is necessary for all the one VOB to enter, will be described with reference to FIG.

  FIG. 3 is a diagram showing a conventional method and a method of using the recording buffer memory according to the present invention, and FIG. 3A is a diagram showing a method of using the buffer memory of the conventional method.

  In the DVD video standard, the maximum number of cells in one video title set (VTS) is defined as 255. Therefore, the maximum number of VOBs constituting one VTS is also limited to 255 at the maximum because the VOB is composed of one or more cells.

  Thus, if the maximum recording capacity of the recording medium is C and the maximum number of cells, that is, the maximum number of VOBs is N (255), the VOB division timing is defined by C / N, which is the minimum size of VOB. Is done.

  In this way, as shown in FIG. 3A, the memory size 301 of the recording buffer memory defined by the C / N which is the minimum size of the VOB uses all the maximum recording capacity C of the recording medium. The memory size is the minimum necessary for recording one VTS.

  On the other hand, the end of the VOB is determined when the VOB size exceeds a predetermined threshold M, and this VOB size is detected in units of VOBU, so that the maximum time T that one VOBU can take is T The amount of data generated in the memory becomes a cause of variation in VOB size.

  In addition, a delay time d may occur from when the VOB size exceeds the threshold value M until the final VOBU is determined, and the amount of data generated within this delay time d is also equal to the VOB size. It causes variation.

  Further, the time for inserting the navigation information into the VOB stored in the recording buffer memory and the VOB information constituted by the VOB during the recording process in which the navigation information is inserted while accumulating the newly configured VOB are stored in the recording medium. The amount of data generated within the recording processing time α required for recording is also a factor of VOB size variation.

  Thus, for the purpose of recording control, from the point in time when the VOB size exceeds the threshold value M (division timing) to the recording processing time α for accumulating VOB information constituted by the VOB being recorded on the recording medium. Time (T + d + α) is required.

  For this reason, assuming that the maximum recordable bit rate is Rt, the recording buffer memory further includes Rt × (T + d + α) as the memory size 302 of the recording buffer memory for control as shown in FIG. is required.

On the basis of these, Japanese Patent Laid-Open No. 2002-335495 discloses the minimum recording buffer memory size B required for all the VOBs to enter is the minimum VOB size 301 and the recording buffer memory for control. The memory size 302 of
B = C / N + Rt × (T + d + α)
Has been shown to be.

  The publication also shows that the VOB division timing may be divided not only by the VOB size but also by the VOB recording time.

  Next, FIG. 9 shows an example of the functional configuration of the recording apparatus for recording AV data (AV information) on the recording medium in the recording format according to the DVD video standard, using the above-described conventional music / video data as an input. Will be described.

  FIG. 9 is a functional block diagram of an example of a conventional recording apparatus.

  The recording apparatus 900 includes an encoding unit 901, a navigation data generation unit 902, a buffer memory unit 903, a buffer memory control unit 904, and a recording medium recording unit 905.

  The encoding unit 901 compresses and encodes the input AV data, outputs the compressed data to the buffer memory unit 903, and outputs navigation information including reproduction information such as the size of the VOBU to the navigation data generation unit 902.

  As described above with reference to FIG. 2, the buffer memory control unit 904 stores the compressed data supplied from the encoding unit 901 to the buffer memory unit 903 in the buffer memory unit 903 in units of VOBs. Control.

  Based on the navigation information supplied from the encoding unit 901, the navigation data generation unit 902 stores the compressed data in VOB units in the buffer memory unit 903, and then, for each VOBU of the compressed data stored in VOB units, Based on the accumulated end time and size of the VOBU, the navigation data is generated for each VOBU.

  After that, the navigation data generation unit 902 inserts the generated navigation data for each VOBU into the head of the corresponding VOBU of the compressed data for the compressed data stored in the VOB unit of the buffer memory unit 903 to compress the compressed data. An AV stream according to the DVD video standard of data is generated.

  The recording medium recording unit 905 receives an AV stream in accordance with the DVD video standard of the compressed data generated by the buffer memory unit 903, and records the AV stream in the recording format data suitable for the recording format of the recording medium such as DVD or HDD. Thus, recording is performed on a recording medium (not shown).

  Next, the configuration and operation of each unit described above in the conventional recording apparatus 900 shown in FIG. 9 will be described in more detail with reference to FIG.

  FIG. 10 is an operation flowchart of the conventional recording apparatus shown in FIG.

  In FIG. 10, in step S02, the buffer memory unit 903 reads the compressed data generated and supplied by the encoding unit 901 on the buffer memory based on the control of the buffer memory control unit 904.

  In step S03, the buffer memory control unit 904 reads the compressed data stored in the buffer memory in the buffer memory unit 903 that is reading the compressed data, and the size of the compressed data is the minimum VOB size 301 shown in FIG. That is, it is determined whether or not C / N is exceeded.

  If the size of the compressed data already read and stored in the buffer memory in the buffer memory unit 903 does not exceed the minimum VOB size 301, that is, C / N, the buffer memory control unit 904 proceeds to step S04, for example, FIG. It is determined whether or not recording stop control based on a user's recording stop operation or the like from an operation unit (not shown) is input.

  In step S04, the buffer memory control unit 904 returns to step S02 again if recording stop control is not input from an operation unit (not shown) or the like, and stores the compressed data supplied from the encoding unit 901 in the buffer memory unit 903. The compressed data is continuously read as compressed data corresponding to the VOB unit being stored.

  The buffer memory control unit 904 has already read the data into the buffer memory in the buffer memory unit 903 when the recording stop control is input from the operation unit (not shown) or the like in the determination in step S04 or in the determination in step S03. If the size of the stored compressed data exceeds the minimum VOB size 301, that is, C / N, whether or not all the compressed data corresponding to the currently read VOBU has been written to the buffer memory is determined in step S05. judge. This is because the VOB is composed of an integer number of VOBUs, so that the VOB is not composed of VOBUs in a halfway state of reading compressed data. In particular, the determination in step S05 in the latter case corresponds to the determination of whether or not all the compressed data corresponding to the minimum VOB size 301, that is, the VOBU straddling the C / N, has been written on the buffer memory of the buffer memory unit 903. This is because the final VOBU corresponding to the VOB unit that is currently storing the compressed data is in a halfway state of reading compressed data, and the VOB is not completed and configured.

  If all the compressed data corresponding to the VOBU currently being read is not written in the buffer memory of the buffer memory unit 903 in step S05, the process proceeds to step S15, and the buffer memory unit 903 corresponds to the VOBU currently being read. The compressed data to be read is subsequently read as compressed data corresponding to the VOB unit in which the currently compressed data is stored, and the process returns to step S05.

  If all the compressed data corresponding to the currently read VOBU is written in the buffer memory of the buffer memory unit 903 in step S05, the process returns to step S02, and the compressed data continuously supplied from the encoding unit 901 is stored in the buffer memory. The unit 903 reads the data into the buffer memory based on the control of the buffer memory control unit 904. At this time, the buffer memory control unit 904 uses the compressed data continuously supplied from the encoding unit 901 as the compressed data corresponding to the next VOB unit of the VOB unit for which the accumulation of the compressed data has been completed in step S02. Reading continues on the buffer memory of the memory unit 903.

  In addition, in step S05, when all the compressed data corresponding to the VOBU that is currently being read when the recording stop control is input is read into the buffer memory of the buffer memory unit 903, or the minimum VOB size 301, that is, all compressed data corresponding to VOBUs straddling C / N are read on the buffer memory of the buffer memory unit 903, and thus the process proceeds to step S06.

  In step S06, the navigation data generation unit 902, based on the navigation information including the reproduction information such as the size of the VOBU supplied from the encoding unit 901, all the navigations of the VOBU included in the VOB that has been stored in the compressed data. Generate data.

  In step S07, the navigation data generation unit 902 inserts each of the generated navigation data of all VOBUs at the head of the compressed data of the corresponding VOBU included in the VOB already stored in the buffer memory unit 903, An AV stream according to the video standard is generated. Then, the buffer memory control unit 904 supplies the generated AV stream to the recording medium recording unit 905.

  In step S08, the recording medium recording unit 905, based on the AV stream according to the DVD video standard generated on the buffer memory supplied from the buffer memory unit 903, records the recording format of the AV stream according to the DVD video standard. Data is recorded and held on a recording medium (not shown), that is, a DVD disk.

JP 2002-56609 A JP 2002-335495 A

  As described above, according to the recording apparatus and the recording method of the prior art, the AV information is recorded on the DVD by recording / accumulating the AV information (AV data) in units of VOB using the recording buffer memory having a large memory size. It can be recorded on a DVD disc as a recording medium in a recording format according to the video standard.

  However, in consideration of user convenience, when considering inserting chapters at regular time intervals into an AV stream in accordance with the DVD video standard, so-called automatic chapter insertion, Problems arise.

That is, on the DVD video standard,
1) A chapter as a “bookmark” for jumping to a specific point can be inserted only at the cell boundary constituting the VOB.
2) Up to 99 chapters can be inserted for one VTS.
There are two restrictions.

  For this reason, when considering the content of one title in 6 hours, if chapters are inserted at intervals of 3 minutes, it is necessary to insert 119 chapters, which violates the standard. On the other hand, when chapters are inserted at intervals of 5 minutes, 59 chapters may be inserted, which does not violate the standard.

  If automatic insertion of chapters is not considered, when the maximum capacity C of the recording medium is 5600 MB and the maximum recording bit rate Rt in variable bit rate recording is 10 Mbps, the maximum number of cells in one VTS is defined as 255, Since the maximum number of VOBs constituting one VTS is also limited to a maximum of 255 because the VOB is composed of one or more cells, the minimum VOB size C / N is about 22 MB. = 5600 MB / 255, and a recording buffer memory having a memory size of 22 + 1.25 × (T + d + α) MB is required.

  Therefore, considering automatic chapter insertion at 5 minute intervals, it is necessary to create 59 cell boundaries at arbitrary positions.

  Therefore, the minimum VOB size C / N is about 28.6 MB = 5600 MB / (255-59), and the recording buffer memory needs 28.6 + 1.25 × (T + d + α) MB.

  Thus, in order to realize the automatic chapter insertion function at intervals of 5 minutes, a new memory of about 6.6 MB is required compared to the case where the automatic chapter insertion function is not realized. It is an important issue to be solved.

  Further, even when the automatic chapter insertion function is not realized, in order to insert a chapter at an arbitrary position, the possibility that the chapter can be inserted increases when the VOB size is increased. For this reason, it can be said that it is an important issue to make the VOB size as large as possible in order to make it possible to insert chapters at arbitrary locations.

  Further, the above-described time for inserting navigation information into the VOB stored in the recording buffer memory, and the VOB information configured by the VOB being recorded while inserting the navigation information while storing the newly configured VOB. The recording processing time α required for recording on the DVD disk as the recording medium is the seek time of the recording medium recording unit when recording is started on the DVD disk as the recording medium when continuous recording is interrupted, or It is not constant due to factors such as the difference in the inner and outer circumferences of the DVD disk cylinder and the adjustment time of the laser intensity by trial writing. For this reason, it is necessary for the recording buffer memory to secure a buffer capacity in consideration of the worst value of the recording processing time α. This is also a cause of an increase in the memory capacity and is an important problem to be solved.

  The present invention has been made in view of the above-described problems, and is an easy recording format capable of special reproduction such as fast-forward reproduction by high-speed data search, and has an automatic chapter insertion function, which increases the memory capacity associated with the function. An object of the present invention is to provide a recording apparatus, a recording method, a recording program, and a recording medium that can be realized at low cost.

  In order to solve the above-described problems, the recording apparatus of the present invention includes a management information generation unit (navigation data) that generates management information to be inserted into the divided compressed data for each divided compressed data formed by dividing the compressed data. Generation / correction unit), a data storage unit (buffer memory unit) for storing the corresponding divided compressed data for inserting the management information generated by the management information generating unit, and the divided compression stored in the data storage unit A recording apparatus comprising: a recording medium recording unit that records compressed data formed by inserting management information generated by the management information generating unit into data; and a recording bit rate of the compressed data Based on the information, a data storage control unit (buffer) that sets the data size of the divided compressed data stored in the data storage unit and controls the storage of the compressed data in the data storage unit Characterized in that it comprises a memory controller).

  The recording apparatus of the present invention includes a management information generation unit (navigation data generation / correction unit) that generates management information to be inserted into the divided compressed data for each divided compressed data formed by dividing the compressed data, A data storage unit (buffer memory unit) for storing the corresponding divided compressed data for inserting management information generated by the management information generating unit, and the management information generation in the divided compressed data stored in the data storage unit A recording apparatus comprising: a recording medium recording unit that records compressed data formed by inserting management information generated by the recording unit on a recording medium, the compressed data having the management information inserted by the recording medium recording unit A recording delay time acquisition unit (recording medium recording unit) that acquires information of a recording delay time from when recording is started until data is actually written to the recording medium, Data storage control that controls the accumulation of compressed data in the data storage unit by setting the data size of the divided compressed data stored in the data storage unit based on the recording delay time information supplied from this recording delay time acquisition unit Unit (buffer memory control unit).

  Further, in the recording apparatus of the present invention, the above-described data accumulation control unit (buffer memory control unit) of the recording apparatus further records and compresses the recording delay time information supplied from the recording delay time acquisition unit (recording medium recording unit). The data size of the divided compressed data stored in the data storage unit is set based on the data recording bit rate information, and the storage of the compressed data in the data storage unit is controlled.

  Here, in order to generate management information to be inserted into the divided compressed data for each divided compressed data formed by dividing the compressed data in the management information generation unit described above, the management information for each divided compressed data is newly created. This includes not only generating, but also reading management information that has already been inserted from the compressed data, correcting it, and regenerating it. The compressed data formed by inserting the management information generated by the management information generation unit into the divided compressed data stored in the data storage unit, which is recorded on the recording medium by the recording medium recording unit, The management information of the compressed data in which the management information has already been inserted is rewritten, and the compressed data in which the management information regenerated as described above is reinserted is also included.

  The recording method of the present invention is generated by a management information generation step for generating management information to be inserted into the divided compressed data and a management information generating step for each divided compressed data formed by dividing the compressed data. The data storage step for storing the corresponding divided compressed data for inserting management information in the data storage unit, and the divided compressed data stored in the data storage unit by the data storage unit step are generated by the management information generation step. A recording medium recording step of recording compressed data formed by inserting management information on a recording medium, the data storage step storing in the data storage unit based on recording bit rate information of the compressed data Data storage that sets the data size of the divided compressed data and controls the storage of compressed data in the data storage unit And having a control step.

  The recording method of the present invention is generated by a management information generation step for generating management information to be inserted into the divided compressed data and a management information generating step for each divided compressed data formed by dividing the compressed data. The data storage step for storing the corresponding divided compressed data for inserting management information in the data storage unit, and the divided compressed data stored in the data storage unit by the data storage unit step are generated by the management information generation step. A recording medium recording step for recording compressed data formed by inserting management information on a recording medium, wherein the recording medium recording step records the compressed data with management information inserted on the recording medium Recording delay time to acquire information of recording delay time from the start of recording until data is actually written to the recording medium. The data storage step sets the data size of the divided compressed data stored in the data storage unit based on the information of the recording delay time acquired by the recording delay time acquisition step, and the data storage unit And a data storage control step for controlling the storage of compressed data.

  Further, in the recording method of the present invention, the data storage step of the recording method described above is performed in the data storage unit based on the recording bit rate information of the compressed data and the recording delay time information acquired by the recording delay time acquisition step. It is characterized in that the data size of the divided compressed data to be stored is set and the storage of the compressed data in the data storage unit is controlled.

  Here, to generate management information to be inserted into the divided compressed data for each divided compressed data formed by dividing the compressed data in the management information generating step described above, the management information for each divided compressed data is newly created. This includes not only generating, but also reading management information that has already been inserted from the compressed data, correcting it, and regenerating it. The compressed data formed by inserting the management information generated by the management information generation unit into the divided compressed data stored in the data storage unit, which is recorded on the recording medium by the recording medium recording unit, The management information of the compressed data in which the management information has already been inserted is rewritten, and the compressed data in which the management information regenerated as described above is reinserted is also included.

  Furthermore, according to the recording program of the present invention, since the program for causing the recording method according to the present invention to be executed on the computer is programmed, the computer can function as the recording apparatus according to the present invention described above.

  Further, according to the recording medium of the present invention, the program for executing the recording method according to the present invention is recorded so as to be readable by the computer, so that the computer can function as the recording apparatus according to the present invention described above. .

  According to the recording apparatus, the recording method, the recording program, and the recording medium of the present invention, an automatic chapter insertion function is provided in an easy recording format capable of special reproduction such as fast-forward reproduction by high-speed data search. The increase in capacity can be suppressed and realized at low cost.

  According to the recording apparatus, recording method, recording program, and recording medium of the present invention, the corresponding divided compressed data for inserting the management information generated by the management information generation unit (navigation data generation / correction unit) The data storage unit (buffer memory unit) to be stored can be reduced, the capacity of a recording medium such as a RAM used as the data storage unit can be reduced, and the effect of reducing the cost of the recording apparatus itself can be achieved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 3A, the minimum recording buffer memory size B required in the prior art is C, the maximum recording capacity of the recording medium is C, the maximum number of cells, that is, the maximum number of VOBs is N, and the maximum recording capacity is The bit rate is Rt, the maximum time that one VOBU can take is T, and the delay time from the detection that the VOB size exceeds the threshold M to the final VOBU is determined is d, and stored in the recording buffer memory Recording process required for recording the VOB information composed of the VOB in which the navigation information is inserted while the navigation information is inserted into the recorded VOB and the VOB being recorded while the navigation information is inserted into the recording medium. If time is α,
B = C / N + Rt × (T + d + α)
It can be expressed as

  In other words, the minimum division timing of the VOB is defined by C / N which is the minimum VOB size 301, and the size B of the recording buffer memory is further added to the C / N as the minimum VOB size 301 and further for control recording. This indicates that Rt × (T + d + α) is necessary as the memory size 302 of the buffer memory.

  Therefore, in the case of the conventional recording apparatus 900, it is necessary to determine Rl (Rl <Rt) assuming the maximum recording bit rate Rt and to secure the size B of the recording buffer memory.

  FIG. 3B shows the usage state of the recording buffer memory when the recording bit rate Rl is lower than the maximum recording bit rate Rt.

The recording buffer memory shown in FIG.
1) VOB size 311 having the same fixed size as VOB size 301,
2) The memory size [R × (T + d + α)] varies according to the recording bit rate R, and when the recording bit rate Rl is lower than the maximum recording bit rate Rt, the memory size is [(Rt−Rl) × (T + d + α)]. Recording buffer memory 312 for control, which is decreased by
3) Unused buffer memory 313
It consists of three parts.

  Here, the memory size of the control recording buffer memory 312 varies depending on the recording bit rate R (for example, Rt or Rl), but the time for reading is constant.

  For this reason, when the recording bit rate R1 is low, the buffer memory 313 that is not used is wasted.

  In order to improve this problem, when recording at a low recording bit rate R1, as shown in FIG. 3C, a predetermined process for determining the position of the VOB minimum division timing, that is, the end of the VOB described above. When the threshold value M is variable and the recording bit rate Rl is low, the VOB size 321 is set by enlarging the memory size [(Rt−Rl) × (T + d + α)] of the unused buffer memory 313 described above. The recording buffer memory can be used effectively.

  That is, the VOB size 321 in FIG. 3C is a memory size [C / N + (Rt−Rl) × (T + d + α)] obtained by adding the VOB size 311 in FIG. 3B and the buffer memory 313 that is not used. ing.

  Here, when the recording bit rate R is equal to Rl in FIGS. 3C and 3B, the control time is the same. Therefore, the control recording buffer memory 322 in FIG. ) Has the same size [Rl × (T + d + α)] as the recording buffer memory 312 for control.

  Here, let us consider a case where it is assumed that the total control time (T + d + α) is 5 seconds by automatic chapter insertion at a 5-minute interval in the size of one title of 5600 MB described above.

  In the case of this low bit rate recording, it is assumed that the recording bit rate Rl is 0.25 Mbyte / sec and one title is recorded for 6 hours.

  In this case, 59 cell boundaries need to be newly created in 6 hours, the VOB size is about 28.6 MB = 5600 MB / (255-59) as described above, and the recording buffer memory has about 30 MB = 28. .6 + 0.25 × 5 MB is required.

  Next, consider the case of high bit rate recording.

  Assume that the recording bit rate Rt is 1.25 Mbyte / sec and one title is recorded for one hour.

  In this case, it is necessary to newly create 11 cell boundaries per hour, the VOB size is about 23.0 MB = 5600 MB / (255-11), and the recording buffer memory has about 30 MB = 23.0 + 1.25 × 5MB is enough.

  In this way, it can be seen that many chapters can be inserted by increasing the VOB size 321 as shown in FIG.

  On the other hand, when the conventional VOB size 301 as shown in FIG. 3A is fixed and not variable, about 35 MB = about 28.6 + 1.25 × 5 MB is required at the high bit rate. It can be seen that it is effective in saving memory.

  Details of the recording apparatus 100 of the present embodiment will be described with reference to FIG.

  FIG. 1 is a functional block diagram of a first embodiment of a recording apparatus according to the present invention.

  As shown in FIG. 1, the recording apparatus 100 of the present embodiment receives the conventional musical sound / video data shown in FIG. 9 as an input, and records AV data (AV information) on the recording medium in accordance with the DVD video standard. The recording apparatus 900 has substantially the same functional configuration as that of the recording apparatus 900, but the encoding control unit 106 is different.

  The recording apparatus 100 includes an encoding unit 101, a navigation data generating / modifying unit 102, a buffer memory unit 103, a buffer memory control unit 104, a recording medium recording unit 105, and an encoding control unit 106.

  The encoding unit 101 compresses and encodes the input AV data by a compression method according to the compression rate R (for example, Rt, Rl) controlled and set by the encoding control unit 106 and stores the compressed data in the buffer memory unit 103. In addition to outputting, navigation information including reproduction information such as the size of the VOBU 221 is output to the navigation data generating / modifying unit 102.

  The encoding control unit 106 determines a compression rate R (that is, Rt, Rl) for encoding the AV data by the encoding unit 101 according to the user setting, and controls / sets the compression method for recording by the encoding unit 101.

  The buffer memory control unit 104 receives the recording bit rate R set by the encoding control unit 106 and dynamically determines the VOB size according to the input recording bit rate R. As described with reference to FIG. The buffer memory unit 103 is controlled such that the compressed data supplied from the unit 101 to the buffer memory unit 103 is stored in the buffer memory of the buffer memory unit 103 in units of VOBs.

  Based on the navigation information supplied from the encoding unit 101, the navigation data generating / modifying unit 102 stores the compressed data in units of VOBs in which compressed data is currently stored in the buffer memory of the buffer memory unit 103, and then For each VOBU of compressed data in VOB units, navigation data for each VOBU is generated based on the accumulated end time, size, etc. of the VOBU.

  After that, the navigation data generation unit 102 inserts the generated navigation data for each VOBU into the head of the corresponding VOBU with respect to the compressed data in the VOB unit stored in the buffer memory unit 103, An AV stream according to the DVD video standard is generated.

  The recording medium recording unit 105 receives an AV stream in accordance with the DVD video standard of the compressed data generated by the buffer memory unit 103, and converts this into recording format data that matches the recording format of the recording medium such as a DVD or HDD. Recording is performed on a recording medium (not shown).

  Next, the configuration and operation of each unit described above in the recording apparatus 100 of the present embodiment illustrated in FIG. 1 will be described in detail with reference to FIG.

  FIG. 4 is an operation flowchart of the recording apparatus of the present embodiment shown in FIG.

  The flowchart in FIG. 4 is almost the same as the flowchart in FIG. 10, and the processing shown in step S01 is added, and the processing content shown in step S03 is changed by the added processing in step S01. Yes.

  In step S01, the encoding control unit 106 determines a recording bit rate R (for example, Rt, Rl) as a compression rate for encoding the AV data in the encoding unit 101 according to the recording setting specified by the user, and the determined recording. The bit rate R is supplied to the encoding unit 101 and the buffer memory control unit 104.

  Thus, in FIG. 1, when the recording bit rate R (that is, Rt, Rl) determined based on the user setting is supplied from the encoding control unit 106, the encoding unit 101 uses the supplied recording bit rate R. The input AV data is compression-encoded to generate compressed data. The compressed data generated by the encoding unit 601 is supplied to the buffer memory unit 103, and navigation information including reproduction information such as the size of the VOBU 221 by the compression method is supplied to the navigation data generating / modifying unit 102. Become.

  In step S03, the buffer memory control unit 104 obtains a VOB size for comparison with the size of the compressed data already read and accumulated in the buffer memory in the buffer memory unit 103 from the encoding control unit 106 described above. Based on the recording bit rate R determined based on the setting (that is, Rt, Rl), the minimum VOB size 301 in FIG. 3A and the VOB size 321 in FIG.

  For example, when a low bit rate Rl smaller than the maximum recording bit rate Rt is supplied from the encoding control unit 106 as the recording bit rate R determined based on the user setting, the buffer memory control unit 104 receives the minimum VOB size 301 [ C / N] is increased by the memory size decrease [(Rt−R1) × (T + d + α)] of the recording buffer memory for control based on the decrease in the recording bit rate R, and the VOB size 302 [C / N + ( Rt−Rl) × (T + d + α)] allows many chapters to be inserted.

  As described above, in the process shown in step S01 of FIG. 4, after the encoding control unit 106 determines the recording bit rate R, the recording bit rate R in the encoding unit 101 is set, and the buffer memory control unit 104 sets the VOB size. Corresponding to the determination.

  Note that, after an AV stream in accordance with the DVD video standard is generated from the input AV data based on the determined VOB size and recording of the recording format data of the AV stream on the recording medium is started, step S01 is performed. The VOB size determination shown in FIG. 5 is executed only once before the start of recording, unless the user subsequently changes the setting of the recording bit rate R.

  In step S02, the buffer memory unit 103 reads the compressed data supplied from the encoding unit 101 into the buffer memory based on the control by the buffer memory control unit 104.

  In step S03, the buffer memory control unit 104 determines that the size of the compressed data already read and stored in the buffer memory unit 103 that is reading the compressed data is the recording bit rate R in step S01. VOB size determined based on the above, specifically, the minimum VOB size 301 [C / N], or the memory size decrease [Rt × (T + d + α)] for the control recording buffer memory based on the decrease in the recording bit rate R [ It is determined whether or not the VOB size 303 [C / N + {(Rt−R1) × (T + d + α)}] increased by (Rt−R1) × (T + d + α)] is exceeded.

  The buffer memory control unit 104 determines the VOB size ([C / N]) in which the size of the compressed data already read and accumulated in the buffer memory in the buffer memory unit 103 is determined based on the recording bit rate R in step S01. Or, if [C / N + {(Rt−Rl) × (T + d + α)}]) is not exceeded, the process of step S04 is performed, and if the VOB size determined based on the recording bit rate R in step S01 is exceeded, The process of step S05 is performed.

  The processing contents of the units 101 to 106 in steps S04 to S08 and step S15 after step S04 are the same as the corresponding processing contents in steps S04 to S08 and step S15 in the operation flowchart shown in FIG. Detailed description is omitted.

  Thereby, according to the recording apparatus 100 of the present embodiment, when the recording bit rate R is reduced below the maximum recording bit rate Rt according to the user setting, the VOB size is set to the minimum VOB size [C / N]. On the other hand, since the memory size decrease [(Rt−R1) × (T + d + α)] of the recording buffer memory for control based on the decrease in the recording bit rate R can be automatically adjusted to a large value, the automatic chapter insertion function is provided. The increase in memory capacity associated with this can be suppressed and realized at low cost.

  In the recording apparatus 100 of the present embodiment, the encoding unit 101 supplies the compressed data obtained by compressing and encoding the AV data to the buffer memory unit 103 as it is, and the buffer memory unit 103 navigates the stored compressed data. Although the navigation data generated by the data generation / modification unit 102 is inserted, the configuration in which navigation data is inserted into compressed data obtained by compression-coding AV data is not limited to this.

  For example, the encoding unit 101 generates a navigation pack 231 in which correctable information is recorded at the head of each VOBU 221, and the buffer memory unit 103 is supplied with compressed data of AV data in which the correctable navigation pack 231 is inserted. The navigation data generation / correction unit 102 reads out the navigation data of the navigation pack 231 from the compressed data of the AV data in which the navigation pack 231 stored in the buffer memory unit 103 is inserted, and records the data. A configuration may be adopted in which the corrected navigation data is rewritten in the navigation pack 231 of the buffer memory unit 103 after correcting the data that has not been corrected or the data to be corrected. In this way, navigation data including future time information and position information can be inserted into the compressed data by reading the navigation data from the compressed data of the AV data, and correcting and rewriting the navigation data.

  Details of the recording apparatus 500 of the present embodiment will be described with reference to FIG.

  FIG. 5 is a functional block diagram of a second embodiment of the recording apparatus according to the present invention.

  As shown in FIG. 5, the recording apparatus 500 of the present embodiment is different from the recording apparatus 100 of the first embodiment shown in FIG. 1 configured to receive AV data (AV information) such as musical sound / video data. In contrast, compressed data obtained by compressing AV data is directly input to the recording apparatus 500, and does not include the encoding unit 101 (see FIG. 1).

  The recording apparatus 500 includes a recording information reading unit 501, a navigation data generation / modification unit 502, a buffer memory unit 503, a buffer memory control unit 504, and a recording medium recording unit 505.

  The recording information reading unit 501 receives compressed data obtained by compressing / encoding AV data, outputs the input compressed data to the buffer memory unit 503, and calculates the size of the VOBU from the input compressed data. And the like, and the recording bit rate information including the recording bit rate R (for example, Rt, Rl) used for the compression / encoding. Then, the recorded information reading unit 501 supplies the read navigation information to the navigation data generating / modifying unit 502 and supplies the read recorded bit rate information to the buffer memory control unit 504. That is, the recording information reading unit 501 functions as means for extracting the recording bit rate R (that is, Rt, Rl) from the input compressed data.

  The buffer memory control unit 504 is supplied with the read recording bit rate information from the recording information reading unit 501, and dynamically changes the buffer memory control unit 504 according to the recording bit rate R (Rt, Rl) based on the supplied recording bit rate information. The VOB size 301 or the VOB size 321 shown in FIG. 4 is determined, and the compressed data supplied from the recording information reading unit 501 to the buffer memory unit 503 is stored in the buffer memory of the buffer memory unit 503 in units of VOB. The memory unit 503 is controlled.

  Similarly, the navigation data generation / modification unit 502 stores the compressed data in VOB units in the buffer memory unit 503 on the basis of the navigation information supplied from the recorded information reading unit 501, and then, for each VOBU of the compressed data in the VOB unit. In addition, the navigation data for each VOBU is generated based on the end time and size of the stored VOBU.

  After that, the navigation data generation unit 502 inserts the generated navigation data for each VOBU into the compressed data stored in the buffer memory unit 503 at the head of the corresponding VOBU, and conforms to the DVD video standard for compressed data. An AV stream is generated.

  The recording medium recording unit 505 receives an AV stream in accordance with the DVD video standard of the compressed data generated by the buffer memory unit 503, and converts this into recording format data that matches the recording format of the recording medium such as a DVD or HDD. Recording is performed on a recording medium (not shown).

  Next, the configuration and operation of each unit described above in the recording apparatus 500 of the present embodiment shown in FIG. 5 will be described in detail with reference to FIG.

  In the case of the recording apparatus 500 of this embodiment shown in FIG. 5, the specific contents of the process for determining the VOB size from the recording bit rate shown in step S01 in FIG. The recording apparatus 500 is changed according to the configuration.

  That is, in the case of the recording apparatus 500 of the present embodiment, in step S01, the recorded information reading unit 501 uses the compressed data of the input AV data from the navigation data including reproduction information such as the size of the VOBU, and the compressed / compressed data. The recording bit rate information including the recording bit rate R (Rt or Rl) used for encoding is read. The read navigation information is supplied to the navigation data generation / correction unit 502, and the read recording bit rate information is supplied to the buffer memory control unit 504.

  Thereby, the buffer memory control unit 504 sets the VOB size for comparison with the size of the compressed data already read and stored in the buffer memory in the buffer memory unit 503 in step S03 of FIG. Based on the recording bit rate R (that is, Rt, Rl) included in the recording bit rate information read and supplied by the reading unit 501, the minimum VOB size 301 in FIG. 3A and the one in FIG. The change is made as described in the VOB size 321.

  For example, when a low bit rate Rl smaller than the maximum recording bit rate Rt is supplied as the recording bit rate R extracted from the recording information reading unit 501, the buffer memory control unit 504 reduces the minimum VOB size 301 [C / N] is increased by the memory size decrease [(Rt−R1) × (T + d + α)] of the recording buffer memory for control based on the decrease in the recording bit rate R, and the VOB size 302 [C / N + (Rt− Rl) × (T + d + α)], so that many chapters can be inserted.

  As described above, the processing shown in step S01 of FIG. 4 is performed by the recording apparatus 500 of the present embodiment after the recording information reading unit 501 extracts the recording bit rate R of the compressed data of the input AV data, This corresponds to determining the VOB size by the buffer memory control unit 504 based on the recording bit rate information including the extracted recording bit rate R.

  Note that, after an AV stream in accordance with the DVD video standard is generated from the input AV data based on the determined VOB size and recording of the recording format data of the AV stream on the recording medium is started, step S01 is performed. The VOB size determination shown in (1) is executed only once before the start of recording, except when the recording bit rate R of the compressed data is subsequently changed.

  In step S02, the buffer memory unit 503 reads the compressed data supplied from the recording information reading unit 501 into the buffer memory based on the control by the buffer memory control unit 504.

  In step S03, the buffer memory control unit 504 determines that the size of the compressed data already read and accumulated in the buffer memory in the buffer memory unit 503 that is reading this compressed data is the recording bit rate R in step S01. VOB size determined based on the above, specifically, the minimum VOB size 301 [C / N], or the memory size decrease [Rt × (T + d + α)] for the control recording buffer memory based on the decrease in the recording bit rate R [ It is determined whether or not the VOB size 303 [C / N + {(Rt−R1) × (T + d + α)}] increased by (Rt−R1) × (T + d + α)] is exceeded.

  The buffer memory control unit 504 determines the VOB size ([C / N]) in which the size of the compressed data already read and accumulated in the buffer memory in the buffer memory unit 503 is determined based on the recording bit rate R in step S01. Or if [C / N + {(Rt−Rl) × (T + d + α)}]) is not exceeded, the process of step S04 is performed, and if the VOB size determined based on the recording bit rate R in step S02 is exceeded, The process of step S05 is performed.

  The processing contents of the steps S04 to S08 and the steps S15 to S506 after this step S04 are the same as the corresponding processing contents of the corresponding steps S04 to S08 and step S15 in the operation flowchart shown in FIG. Detailed description is omitted. However, in this embodiment, in step S06, the navigation data generation unit 502 differs from the recording device 100 of the first embodiment in that the size of the VOBU supplied from the recording information reading unit 501 and the like. Based on the navigation information including the reproduction information, the navigation data of all the VOBUs included in the VOB in which the compressed data has been accumulated is generated.

  Thereby, according to the recording apparatus 500 of this embodiment, when the recording bit rate R is the compressed data of the recording bit rate R1 lower than the maximum recording bit rate Rt in accordance with the compressed data of the input AV data, the VOB The size is automatically reduced by the memory size decrease [(Rt−Rl) × (T + d + α)] of the recording buffer memory for control based on the low recording bit rate R with respect to the minimum VOB size [C / N]. Therefore, the automatic chapter insertion function can be realized at a low cost by suppressing an increase in memory capacity associated therewith.

  In the recording apparatus 500 of the present embodiment, the recording information reading unit 501 supplies the compressed data obtained by compression-coding AV data to the buffer memory unit 503 as it is, and the buffer memory unit 503 applies the compressed data to the stored compressed data. Although the navigation data generated by the navigation data generation / correction unit 502 is inserted, the configuration for inserting the navigation data into the compressed data obtained by compressing and encoding the AV data is not limited to this.

  For example, the recorded information reading unit 501 does not supply the compressed data of the supplied AV data as it is to the buffer memory unit 503, but generates a navigation pack 231 in which correctable information is recorded at the head of each VOBU 221. The unit 503 is configured to supply compressed data of AV data in which the correctable navigation pack 231 is inserted, and the navigation data generation / correction unit 502 is stored in the buffer memory unit 503. After the navigation data of the navigation pack 231 is read out from the compressed data of the AV data in which is inserted, the data not recorded or the data to be corrected is corrected, and the corrected navigation data is stored in the navigation pack of the buffer memory unit 503. It is good also as a structure rewritten in H.231. In this way, navigation data including future time information and position information can be inserted into the compressed data by reading the navigation data from the compressed data of the AV data, and correcting and rewriting the navigation data.

  Further, the recording information reading unit 501 adopts a functional configuration that does not generate information such as navigation information or recording bit rate information from the compressed data, and the navigation information or recording bit rate information is corrected from the recording information reading unit 501 by the navigation data correction. Instead of supplying the data to the generation unit 502 or the buffer memory control unit 504, a configuration in which the data is input and supplied may be adopted.

  FIG. 6 is a functional block diagram of a third embodiment of the recording apparatus according to the present invention.

  As shown in FIG. 6, the recording apparatus 500 of this embodiment receives AV data such as musical sound / video data as input, and records AV data (AV information) in a recording format according to the DVD video standard on a recording medium. 1 has substantially the same functional configuration as that of the recording apparatus 100 of the first embodiment shown in FIG. 1 except that the recording medium recording control unit 607 is further included.

  The recording apparatus 600 includes an encoding unit 601, a navigation data generation / modification unit 602, a buffer memory unit 603, a buffer memory control unit 604, a recording medium recording unit 605, an encoding control unit 606, and a recording medium recording control unit 607. It is configured.

  The encoding unit 601 compresses and encodes the input AV data by a compression method according to the compression rate R (for example, Rt, Rl) controlled and set by the encoding control unit 606, and the compressed data is stored in the buffer memory unit 603. In addition to outputting, navigation information including reproduction information such as the size of the VOBU 221 is output to the navigation data generating / modifying unit 602.

  The encoding control unit 606 determines a compression rate R (that is, Rt, Rl) for encoding AV data by the encoding unit 601 according to the user setting, and controls and sets the compression method for recording by the encoding unit 601.

  The buffer memory control unit 604 receives the recording bit rate R set by the encoding control unit 606 and the recording delay time α acquired from the recording medium recording unit 605 by the recording medium recording control unit 607, and receives the input recording bit rate R. Accordingly, the VOB size is dynamically determined, and the compressed data supplied from the encoding unit 601 to the buffer memory unit 603 is stored in the buffer memory of the buffer memory unit 603 in units of VOB as described with reference to FIG. The buffer memory unit 603 is controlled.

  Based on the navigation information supplied from the encoding unit 601, the navigation data generating / modifying unit 602 stores the compressed data in units of VOBs that are currently storing compressed data in the buffer memory of the buffer memory unit 603, and then For each VOBU of compressed data in VOB units, navigation data for each VOBU is generated based on the end time, size, etc. of the stored VOBU.

  Then, the navigation data generation unit 602 inserts the generated navigation data for each VOBU into the head of the corresponding VOBU with respect to the compressed data in the VOB unit stored in the buffer memory unit 603, and stores the compressed data An AV stream according to the DVD video standard is generated.

  The recording medium recording unit 605 receives an AV stream in accordance with the DVD video standard of the compressed data generated by the buffer memory unit 603, and converts this into recording format data that matches the recording format of the recording medium such as a DVD or HDD. Recording is performed on a recording medium (not shown).

  When starting recording, the recording medium recording control unit 607 instructs the recording medium recording unit 605 to output an expected time (recording delay time α) from when recording is instructed until recording is actually started. The recording medium recording control unit 607 supplies the recording delay time α obtained from the recording medium recording unit 605 to the buffer memory control unit 604.

  That is, as described with reference to FIG. 3, the recording processing time α for recording the VOB information on the recording medium depends on the seek time when the continuous recording is interrupted or when recording is started, and the difference between the inner and outer circumferences of the recording medium. It fluctuates depending on factors such as adjustment of the rotation speed and adjustment time of the laser intensity by trial writing. Therefore, it is necessary to secure a buffer capacity in the buffer memory unit 603 that is a recording buffer memory in consideration of the worst value for the recording processing time α.

  The recording medium recording control unit 607 instructs the recording medium recording unit 605 to supply an expected time from when the recording medium recording unit 605 instructs to start recording to when recording on the recording medium is actually started. Then, the recording medium recording control unit 607 supplies the expected time (recording processing time) acquired from the recording medium recording unit 605 in response to the expected time supply instruction to the buffer memory control unit 604 as the recording processing time α. .

  Next, the configuration and operation of each unit described above in the recording apparatus 600 of this embodiment shown in FIG. 6 will be described in more detail with reference to FIG.

  FIG. 7 is an operation flowchart of the recording apparatus of the present embodiment shown in FIG.

  The flowchart in FIG. 7 is almost the same as the flowchart in FIG. 4, and the processing shown in steps S09 and S10 is added, and the processing content shown in step S03 is changed by the added processing in steps S09 and S10. It has become a thing.

  The encoding control unit 606 determines a recording bit rate R (for example, Rt, Rl) that is a compression rate for encoding AV data in the encoding unit 601 according to the recording setting specified by the user, and uses the determined recording bit rate R The data is supplied to the encoding unit 601 and the buffer memory control unit 604.

  Thus, in FIG. 6, when the recording bit rate R (that is, Rt, Rl) determined based on the user setting is supplied from the encoding control unit 606, the encoding unit 601 uses the supplied recording bit rate R. The input AV data is compression-encoded to generate compressed data. The compressed data generated by the encoding unit 601 is supplied to the buffer memory unit 603, and navigation information including reproduction information such as the size of the VOBU 221 by the compression method is supplied to the navigation data generation / modification unit 602. become.

  In step S09, the estimated time from the start of recording by the recording medium recording unit 605 to the start of actual recording on the recording medium is determined based on the instruction from the recording medium recording control unit 607. By 607, it is read from the recording medium recording unit 605 as recording delay information. The read estimated time is supplied from the recording medium recording control unit 607 to the buffer memory control unit 604 as a recording delay time α.

  In step S10, the buffer memory control unit 604 compares the size of the compressed data already read and stored in the buffer memory in the buffer memory unit 603 in step S03 of FIG. 7 corresponding to step S03 of FIG. 3A based on the recording bit rate R determined based on the user setting from the encoding control unit 606 and the recording delay time α supplied from the recording medium recording control unit 607, as shown in FIG. As described with reference to the minimum VOB size 301 and the VOB size 321 in FIG.

  For example, when a low bit rate Rl smaller than the maximum recording bit rate Rt is supplied as the recording bit rate R determined based on the user setting from the encoding control unit 606, the buffer memory control unit 604, the minimum VOB size 301 [ C / N] is increased by the memory size decrease [(Rt−R1) × (T + d + α)] of the recording buffer memory for control based on the decrease in the recording bit rate R, and the VOB size 321 [C / N + ( Rt−Rl) × (T + d + α)] allows many chapters to be inserted.

  Further, the recording delay time α at the time of the above calculation is, for example, the seek time when continuous recording is interrupted or when recording is started, the adjustment of the rotational speed due to the difference between the inner and outer circumferences, and the laser intensity by trial writing. It becomes possible to change according to individual factors such as adjustment time and combinations of these individual factors.

  In step S02, the buffer memory unit 603 reads the compressed data supplied from the encoding unit 601 into the buffer memory based on the control by the buffer memory control unit 604.

  In step S03, the buffer memory control unit 604 determines that the size of the compressed data already read and accumulated in the buffer memory unit 603 that is reading this compressed data is the recording bit rate R in step S10. And the recording buffer memory for control based on the VOB size determined based on the recording delay time α, specifically, the minimum VOB size 301 [C / N], or the reduction in the recording bit rate R or the supplied recording delay time α. Whether or not the VOB size 321 [C / N + {(Rt−Rl) × (T + d + α)}] increased by [Rt × (T + d + α)] is increased by the memory size decrease [(Rt−Rl) × (T + d + α)]. Determine whether.

  The buffer memory control unit 604 determines the size of the compressed data already read and accumulated in the buffer memory in the buffer memory unit 603 based on the recording bit rate R and the recording delay time α in step S10 (VOB size ( If [C / N] or [C / N + {(Rt−Rl) × (T + d + α)}]) is not exceeded, the process of step S04 is performed, and based on the recording bit rate R and the recording delay time α in step S10. If the determined VOB size is exceeded, the process of step S05 is performed.

  With respect to the processing contents by the units 601 to 606 in steps S04 to S08 and step S15 after step S04, except for step S05, corresponding steps S04 to S08 and step S15 in the operation flowchart shown in FIG. 4 correspond. Since it is the same as the processing content, its detailed description is omitted.

  As for step S05, if all the compressed data corresponding to the VOBU currently being read is not written in the buffer memory, the process proceeds to step S15, and the compressed data corresponding to the VOBU currently being read is stored in the buffer memory unit 603. The point that the currently compressed data is continuously read as the compressed data corresponding to the VOB unit being stored is the same as the process of step S05 shown in FIG. However, when all the compressed data corresponding to the VOBU currently being read is written in the buffer memory, the process proceeds to the navigation data creation process shown in step S06, which is the same as the process in step S05 shown in FIG. However, returning to step S02, the buffer memory control unit 604 uses the compressed data continuously supplied from the encoding unit 601 as the compressed data corresponding to the next VOB unit of the VOB unit in which the compressed data has been accumulated. FIG. 4 shows that the VOB size is re-determined based on the recording bit rate R and the recording delay time α by executing the above-described steps S09 and S10 again when the data is continuously read into the buffer memory of the memory unit 603. This is different from the processing in step S05.

  Due to the difference in configuration, in this embodiment, in step S02, the compressed data continuously supplied from the encoding unit 601 is converted into buffer data corresponding to the next VOB unit of the VOB unit after the storage of the compressed data is completed. When the compressed data is continuously read into the memory unit 603, the recording delay time α for the recording medium of the recording medium recording unit 605 before the VOB unit is successively stored in the buffer memory unit 603 corresponding to the next VOB unit. It has been reflected.

  As a result, in the case of the present embodiment, as compared with the first embodiment in which the recording delay time α is fixed, the recording medium recording unit 605 further increases the recording delay time α in accordance with the change in the recording delay time α. The VOB size into which chapters can be inserted can be selected.

  Therefore, according to the recording apparatus 600 of this embodiment, when the recording bit rate R is reduced below the maximum recording bit rate Rt according to the user setting, the VOB size is set to the minimum VOB size [C / N]. Therefore, since the memory size of the recording buffer memory for control [(Rt−R1) × (T + d + α)] based on the decrease in the recording bit rate R can be automatically adjusted to a large value, the automatic chapter insertion function is provided. The increase in the memory capacity accompanying the above can be suppressed and realized at low cost.

  Further, the adjustment of the VOB size also includes the recording medium recording control unit 607, so that the recording delay time α of the compressed data corresponding to the previous VOB unit by the storage recording medium recording unit 605 for each VOB unit. Therefore, the VOB size [C / N + {(Rt−R1) × (T + d + α)}] can be determined, so that finer adjustment can be performed.

  In the recording apparatus 600 of this embodiment, the encoding unit 601 supplies the compressed data obtained by compressing and encoding the AV data to the buffer memory unit 603 as it is, and the buffer memory unit 603 navigates the stored compressed data. Although the navigation data generated by the data generation / correction unit 602 is inserted, the configuration in which navigation data is inserted into compressed data obtained by compression-coding AV data is not limited to this. This is the same as the case of the recording apparatus 100 of the first embodiment.

  FIG. 8 is a functional block diagram of a fourth embodiment of the recording apparatus according to the present invention.

  The recording apparatus 800 of this embodiment is different from the recording apparatus 600 of the third embodiment shown in FIG. 6 in the configuration in which AV data (AV information) such as musical sound / video data is input, and the recording apparatus 800 shown in FIG. Similarly to the recording apparatus 500 of the second embodiment, compressed data obtained by compressing AV data is directly input to the recording apparatus 600, and recording is performed instead of having the encoding unit 501 (see FIG. 6). The information reading unit 801 is included.

  The recording apparatus 800 includes a recording information reading unit 801, a navigation data generation / modification unit 802, a buffer memory unit 803, a buffer memory control unit 804, a recording medium recording unit 805, and a recording medium recording control unit 807. Yes.

  The recording information reading unit 801 in this embodiment is the same as the recording information reading unit 501 in the recording apparatus 500 of the second embodiment shown in FIG. 5, and other navigation data generation / modification unit 802 and buffer memory unit 803. The configuration of the buffer memory control unit 804, the recording medium recording unit 805, and the recording medium recording control unit 807 includes the corresponding navigation data generation / modification unit 602, buffer, and the like in the recording apparatus 600 of the third embodiment shown in FIG. The configuration is the same as that of the memory unit 603, the buffer memory control unit 604, the recording medium recording unit 605, and the recording medium recording control unit 607.

  Since the configuration and operation of the above-described units in the recording apparatus 800 of the present embodiment configured as described above are the same as the contents of the operation flowchart of the recording apparatus 600 of the third embodiment shown in FIG. The detailed explanation is omitted.

  As a result, in the case of the present embodiment, as compared with the second embodiment in which the recording delay time α is fixed, the recording medium recording unit 805 further increases the recording delay time α in accordance with the change in the recording delay time α. The VOB size into which chapters can be inserted can be selected.

  Therefore, according to the recording apparatus 800 of the present embodiment, similar to the recording apparatus 600 of the third embodiment, the automatic chapter insertion function can be realized at a low cost by suppressing an increase in memory capacity associated therewith.

  Further, the adjustment of the VOB size also includes the recording medium recording control unit 807, so that the recording delay time α of the compressed data corresponding to the previous VOB unit by the storage recording medium recording unit 805 is provided for each VOB unit. Therefore, the VOB size [C / N + {(Rt−R1) × (T + d + α)}] can be determined, so that finer adjustment can be performed.

  In the recording apparatus 600 of this embodiment, the recording information reading unit 801 supplies the compressed data obtained by compressing and encoding the AV data to the buffer memory unit 803 as it is, and the buffer memory unit 803 applies the compressed data to the stored compressed data. Although the navigation data generated by the navigation data generation / correction unit 502 is inserted, the configuration in which navigation data is inserted into compressed data obtained by compression-coding AV data is not limited to this. This is the same as the case of the recording apparatus 500 of the second embodiment.

  As described above, the recording apparatus and the recording method according to the embodiment of the present invention are configured. However, the recording method by the recording apparatuses 100, 500, 600, and 800 according to the above-described examples is executed by a computer. In addition, by recording the program on a computer-readable recording medium, a device such as a personal computer or a PDA can be recorded in the recording device 100 of each of the above-described embodiments. , 500, 600, and 800.

  The specific configuration of the recording apparatus and the recording method of the present embodiment also varies the memory size of the buffer memory unit according to the value of the recording bit rate R or the recording delay time α, and the automatic chapter insertion function is As long as the increase in the memory capacity associated with the function can be suppressed and realized at low cost, the configuration and procedure of each embodiment described above are not limited.

1 is a functional block diagram of a first embodiment of a recording apparatus according to the present invention. It is a block diagram which shows the structure of a video title. It is a figure which shows the conventional method and the utilization method of the recording buffer memory by this invention. 3 is an operation flowchart of the recording apparatus according to the first embodiment of the present invention. It is a functional block diagram of the 2nd example of the recorder concerning the present invention. It is a functional block diagram of the 3rd example of the recording device concerning the present invention. It is an operation | movement flowchart of the recording device of the 3rd Example in this invention. It is a functional block diagram of the 4th example of a recorder concerning the present invention. It is a functional block diagram of an example of a conventional recording apparatus. It is an operation | movement flowchart of the conventional recording device.

Explanation of symbols

100, 500, 600, 800 Recording device 101, 601 Encoding unit 501, 801 Recording information reading unit 102 502, 601, 802 Navigation data generation / modification unit 103 503, 603, 803 Buffer memory unit 104 504, 604, 804 Buffer memory Control unit 105 505, 605, 805 Recording medium recording unit 606 Encoding control unit 507, 807 Recording medium recording control unit 900 Recording device

Claims (12)

A management information generating unit that generates management information to be inserted into the divided compressed data for each divided compressed data formed by dividing the compressed data;
A data storage unit for storing the corresponding divided compressed data for inserting the management information generated by the management information generation unit;
A recording medium recording unit for recording compressed data formed by inserting the management information generated by the management information generating unit into the divided compressed data stored in the data storage unit on a recording medium; A device,
A data accumulation control unit configured to set the data size of the divided compressed data accumulated in the data accumulation unit based on the recording bit rate information of the compressed data and to control the accumulation of the compressed data in the data accumulation unit; A recording apparatus. A management information generating unit that generates management information to be inserted into the divided compressed data for each divided compressed data formed by dividing the compressed data;
A data storage unit for storing the corresponding divided compressed data for inserting the management information generated by the management information generation unit;
A recording medium recording unit for recording compressed data formed by inserting the management information generated by the management information generating unit into the divided compressed data stored in the data storage unit on a recording medium; A device,
Recording delay time acquisition for acquiring information of recording delay time from the start of recording to when data is actually written to the recording medium when recording the compressed data into which the management information is inserted by the recording medium recording unit to the recording medium And
Data for controlling the accumulation of compressed data in the data storage unit by setting the data size of the divided compressed data stored in the data storage unit based on the information of the recording delay time supplied from the recording delay time acquisition unit A recording apparatus comprising: an accumulation control unit. A management information generating unit that generates management information to be inserted into the divided compressed data for each divided compressed data formed by dividing the compressed data;
A data storage unit for storing the corresponding divided compressed data for inserting the management information generated by the management information generation unit;
A recording medium recording unit for recording compressed data formed by inserting the management information generated by the management information generating unit into the divided compressed data stored in the data storage unit on a recording medium; A device,
Recording delay time acquisition for acquiring information of recording delay time from the start of recording to when data is actually written to the recording medium when recording the compressed data into which the management information is inserted by the recording medium recording unit to the recording medium And
Based on the recording delay time information supplied from the recording delay time acquisition unit and the recording bit rate information of the compressed data, the data size of the divided compressed data stored in the data storage unit is set, and the data storage unit And a data storage control unit for controlling the storage of the compressed data. An encoding unit that compresses data to generate compressed data;
An encoding control unit that supplies desired recording bit rate information to the encoding unit and controls generation of compressed data by the encoding unit;
The compressed data generated by the encoding unit is supplied to the data storage unit, and the recording bit rate information supplied from the encoding control unit to the encoding unit is recorded to the data storage control unit. 4. The recording apparatus according to claim 1, wherein the recording apparatus is supplied as rate information. A recording information acquisition unit for acquiring recording bit rate information of compressed data supplied to the data storage unit;
The data storage unit is supplied with compressed data whose recording bit rate information has been acquired by the recording information acquisition unit, and the data storage control unit is compressed with the recording bit rate information acquired by the recording information acquisition unit. 4. The recording apparatus according to claim 1, wherein the recording apparatus is supplied as data recording bit rate information. A management information generation step for generating management information to be inserted into the divided compressed data for each divided compressed data formed by dividing the compressed data;
A data accumulating step for accumulating in the data accumulating unit the corresponding divided compressed data for inserting the management information generated by the management information generating step;
A recording medium recording step of recording the compressed data formed by inserting the management information generated by the management information generation step into the divided compressed data stored in the data storage unit by the data storage step, on a recording medium A recording method,
The data accumulation step includes a data accumulation control step for setting the data size of the divided compressed data accumulated in the data accumulation unit based on the recording bit rate information of the compressed data, and controlling accumulation of the compressed data in the data accumulation unit. A recording method comprising: A management information generation step for generating management information to be inserted into the divided compressed data for each divided compressed data formed by dividing the compressed data;
A data accumulating step for accumulating in the data accumulating unit the corresponding divided compressed data for inserting the management information generated by the management information generating step;
A recording medium recording step for recording the compressed data formed by inserting the management information generated by the management information generation step into the divided compressed data stored in the data storage unit by the data storage unit step on a recording medium; A recording method comprising:
The recording medium recording step is a recording delay time for acquiring information of a recording delay time from the start of recording until the data is actually written to the recording medium when the compressed data into which the management information is inserted is recorded on the recording medium. Has an acquisition step,
The data storage step sets the data size of the divided compressed data stored in the data storage unit based on the information of the recording delay time acquired by the recording delay time acquisition step, and stores the compressed data in the data storage unit. A recording method comprising a data accumulation control step for controlling accumulation. A management information generation step for generating management information to be inserted into the divided compressed data for each divided compressed data formed by dividing the compressed data;
A data accumulating step for accumulating in the data accumulating unit the corresponding divided compressed data for inserting the management information generated by the management information generating step;
A recording medium recording step for recording the compressed data formed by inserting the management information generated by the management information generation step into the divided compressed data stored in the data storage unit by the data storage unit step on a recording medium; A recording method comprising:
The recording medium recording step is a recording delay time for acquiring information of a recording delay time from the start of recording until the data is actually written to the recording medium when the compressed data into which the management information is inserted is recorded on the recording medium. Has an acquisition step,
The data storage step sets the data size of the divided compressed data stored in the data storage unit based on the recording bit rate information of the compressed data and the information of the recording delay time acquired by the recording delay time acquisition step, A recording method comprising a data accumulation control step for controlling accumulation of compressed data in a data accumulation unit. The method further includes an encoding step of generating compressed data by compressing the data with desired recording bit rate information, and the divided compressed data stored in the data storage unit by the data storage step is the compressed data generated by the encoding step. 7. The recording bit rate information of compressed data that is divided compressed data and used in the data accumulation control step is desired recording bit rate information when compressed data is generated in the encoding step. Or the recording method of 8. A recording information acquisition step of acquiring recording bit rate information of the compressed data supplied to the data storage unit, and the divided compressed data stored in the data storage unit by the data storage step is recorded by the recording information acquisition step; The compressed bit data of the compressed data from which the bit rate information is acquired, and the recording bit rate information of the compressed data used in the data storage control step is the recording bit rate information acquired in the recording information acquisition step. The recording method according to claim 6 or 8.   The program for making a computer perform the recording method in any one of Claims 6-10.   A computer-readable recording medium recording a program for causing a computer to execute the recording method according to claim 6.

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