JP2011113607A - Device and method for recording information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information recording device and information recording method, for preventing frequent occurrence of pseudo rewrite. <P>SOLUTION: The information recording device includes: a recording means which instructs recording of first new data to a write-once medium, records the first new data to a first recording area and manages the address of a second recording area as a first next recording address; and a rewrite means which instructs rewrite of the first new data, records the rewrite data corresponding to the first new data to the second recording area shown by the first next recording address, records the management data for accessing the second recording area instead of the first recording area in a management area, and manages the address of a third recording area as a second next recording address. The recording means instructs recording of the second new data to the third recording area shown by the second next recording address, and records the second new data to the third recording area. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an information recording apparatus and an information recording method for recording data on a write-once medium.

  Write-once (one-time write) media that can perform Pseudo Over Write are known. For example, when the recording control unit instructs rewriting to the first area where data has been recorded on the write-once medium in accordance with the file system read from the write-once medium, the disk drive unit 1002 causes the above-mentioned first Data is recorded in a second area in which no data is recorded, which is different from the first area. Further, the disk drive unit 1002 records management information for associating the address of the first area and the address of the second area with the management area of the write-once medium. When the recording control unit reads data from the first area, the disk drive unit 1002 reads data from the second area instead of the first area based on the management information. In this way, write-once media can be handled like rewritable media.

  As an example of the above technique, when a normal recording / reproducing area, a rewriting replacement area, and a replacement management area are provided in the main data area of the write-once recording medium, and there is a data write request at a data recorded address A technique has been proposed in which rewrite data is recorded in a rewrite replacement area, and replacement management information that associates data-recorded addresses with rewrite replacement area addresses is recorded in the replacement management area (see Patent Document 1). .

JP 2004-171714 A

  However, in the above-described pseudo-rewriting technique, pseudo-rewriting may occur frequently, and a more efficient pseudo-rewriting technique is desired.

  As a cause of frequent pseudo-rewriting, the recording control unit does not accurately manage the next writable address (hereinafter, abbreviated as NWA). As described above, when pseudo-rewriting occurs under the initiative of the disk drive unit 1002, rewriting data is recorded on the NWA, thereby updating the NWA. The disk drive unit 1002 accurately manages the update NWA, but the recording control unit does not manage the update NWA. For this reason, after the pseudo-rewrite occurs, the recording instruction of new data from the recording control unit may become a recording instruction to the data recorded area, and the disk drive unit 1002 can pseudo-rewrite the recording instruction of the new data. Will be processed. In this way, pseudo-rewriting occurs frequently.

  An object of the present invention is to provide an information recording apparatus and an information recording method capable of suppressing frequent occurrences of pseudo-rewriting.

  An information recording apparatus according to an embodiment of the present invention instructs to record first new data on a write-once medium, and records the first new data in a first recording area of the write-once medium. , Recording means for managing the address of the second recording area of the write-once medium as a first next recording address, instructing rewriting of the first new data, and indicated by the first next recording address Management data for recording rewrite data corresponding to the first new data in the second recording area and converting access to the first recording area into access to the second recording area Rewriting means for recording in a management area of the write-once medium and managing the address of the third recording area of the write-once medium as a second next recording address, and the recording means To the third recording area indicated by the second next recording address to instruct the recording of the second new data, and recording the second new data to the third recording area.

  An information recording method according to an embodiment of the present invention instructs recording of first new data on a write-once medium, and records the first new data on a first recording area of the write-once medium. The address of the second recording area of the write-once medium is managed as the first next recording address, the rewriting of the first new data is instructed, and the second indicated by the first next recording address Rewrite data corresponding to the first new data is recorded in the recording area, and management data for converting access to the first recording area into access to the second recording area is recorded on the write-once medium. And the address of the third recording area of the write-once medium is managed as a second next recording address, and the third recording area indicated by the second next recording address is stored in the third recording area. And second instructing recording of new data, and recording the second new data to the third recording area.

  ADVANTAGE OF THE INVENTION According to this invention, the information recording device and the information recording method which can suppress frequent occurrence of pseudo rewriting can be provided.

It is a figure which shows the whole block structure of the recording / reproducing apparatus (video recording device) to which this invention was applied. It is a figure which shows an example of continuous generation | occurrence | production of pseudo rewriting. It is a figure which shows an example of the process in which the file system manages NWA, and the data recording after pseudo rewriting is not handled as pseudo rewriting. It is a flowchart which shows an example of the recording process of new data or rewriting data. It is a figure which shows an example of the buffer for new data. It is a figure which shows an example of the buffer for rewriting data. It is a figure which shows an example of the process which records the data of the rewrite data buffer in a ECC block unit. For write-once media divided and managed in two zones (partitions 1 and 2), new data buffer and rewrite data buffer for one zone, new data buffer and rewrite data buffer for the other zone FIG. 5 is a diagram illustrating an example of a case of managing new data and rewrite data.

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

  FIG. 1 shows an overall block configuration of a recording / reproducing apparatus (video recording apparatus) to which the present invention is applied. In this embodiment, an apparatus (DVD-VR recorder with HDD) that can handle both an optical disk such as a DVD-R and a hard disk is shown as a recording medium. May be. In FIG. 1, each block is roughly divided. The main block of the recording unit is shown on the left side, and the main block of the playback unit is shown on the right side.

  The video recording apparatus in FIG. 1 has two types of disk drive units. First, an optical disc (DVD-RAM, DVD ± RW, DVD ± R, etc.) 1001 as a first medium, which is an information recording medium that can construct a video file, is rotated and a disc drive unit 1002 that reads and writes information is provided. Have. In addition, it includes a hard disk drive unit 2001 that drives a hard disk (HDD) as a second medium. The data processor unit 1003 can supply recording data to the disk drive unit 1002 and the hard disk drive unit 2001, and can receive a reproduced signal. The disk drive unit 1002 includes a rotation control system for the optical disk 1001, a laser drive system (using a red laser with a wavelength of 650 nm, or a blue laser with a wavelength of 405 nm or less), an optical system, and the like. The data processor unit 1003 handles recording or reproduction unit data, and includes a buffer circuit, a modulation / demodulation circuit, an error correction unit, and the like.

  Further, the video recording apparatus of FIG. 1 includes an encoder section 50 constituting the recording side, a decoder section 60 constituting the playback side, and a microcomputer block (also referred to as a system control section) 30 for controlling the operation of the apparatus main body. Is the main component. The encoder unit 50 includes a plurality of encoders, and each encoder includes a video and audio analog-to-digital converter that digitizes an input analog video signal or analog audio signal, a video encoder, and an audio encoder. Furthermore, a sub-picture encoder is also included. The output of the encoder unit 50 is converted into a predetermined DVD-RAM format by a formatter 51 including a buffer memory, and is supplied to the data processor unit 1003. The encoder unit 50 receives an external analog video signal and an external analog audio signal from the AV input unit 41 or an analog video signal and an analog audio signal from the TV tuner unit 42.

  The encoder unit 50 can also supply the compressed digital video signal or digital audio signal directly to the formatter 51 when a directly compressed digital video signal or digital audio signal is directly input. The encoder unit 50 can also directly supply the digital video signal and audio signal that have been converted from analog to digital to the video mixing unit 71 and the audio selector 76. In the video encoder included in the encoder unit 50, the digital video signal is converted into a digital video signal compressed at a variable bit rate based on the MPEG2 (or MPEG1 or MPEG4-AVC) standard. The digital audio signal is converted into a digital audio signal compressed at a fixed bit rate based on the MPEG or AC-3 standard or a linear PCM digital audio signal.

  When a sub-video signal is input from the AV input unit 41 (for example, a signal from a DVD video player with an independent output terminal of the sub-video signal) or a DVD video signal having such a data structure is broadcast and is transmitted to a TV tuner. When received by the unit 42, the sub-picture signal in the DVD video signal is encoded (run-length encoded) by the sub-picture encoder to become a sub-picture bitmap. The encoded digital video signal, digital audio signal, and sub-picture data are packed by the formatter 51 to become a video pack, an audio pack, and a sub-picture pack, and these are assembled and defined by the DVD-video standard. It is converted into a format (DVD video format) or a format defined in the DVD-recording standard (DVD-VR format).

  Here, the apparatus of FIG. 1 uses the data processor unit 1003 to send information (packets of video, audio, sub-picture data, etc.) formatted by the formatter 51 and the created management information to the hard disk drive unit 2001 or the data disk. It can be supplied to the drive unit 1002 and recorded on the hard disk or the optical disc 1001. Information recorded on the hard disk or the optical disk 1001 can also be recorded on the optical disk 1001 or the hard disk via the data processor unit 1003 and the disk drive unit 1002.

  It is also possible to perform an editing process such as deleting a part of video objects of a plurality of programs recorded on the hard disk or the optical disc 1001 or connecting objects of different programs. This is because the DVD-VR format used in one embodiment of the present invention defines a data unit to be handled and facilitates editing.

  The microcomputer block 30 includes an MPU (microprocessing unit) or CPU (central processing unit), a firmware ROM in which a control program and the like (firmware for performing control described in each flowchart) are written, It includes a work RAM for providing a work area necessary for program execution. The MPU of the microcomputer block 30 uses a RAM as a work area according to a control program stored in the ROM, detects a defect location, detects an unrecorded area, sets recording information recording position, UDF recording, AV address setting, history information Perform search processing and so on.

  That is, the microcomputer block 30 has an information processing unit necessary for overall control of the entire system. In addition to the firmware ROM, work RAM, and directory detection unit, although not shown, VMG (entire video management information) is shown. An information creation unit, a copy related information detection unit, a copy and scrambling information processing unit (RDI processing unit), a packet header processing unit, a sequence header processing unit, an aspect ratio information processing unit, and the like are provided.

  Here, in this apparatus, an extent representing an access unit is defined for the data recording area of the information recording medium using an address and data size information, and includes a plurality of extents, and includes a file. Data is recorded and played back using file entries to be managed. For this purpose, the microcomputer block 30 further includes a file entry management unit 301, which includes an extent management unit 302. The extent management unit 302 includes a deletion target extent processing unit 310, a recorded extent management unit 311, and a recordable extent management unit 312.

  Among the execution results of the above MPU, the contents to be notified to the user are displayed on the display unit 43 of the video recording apparatus or displayed on the monitor display 75 as OSD (on-screen display). The microcomputer block 30 also has a key input unit 44 for giving an operation signal for operating this apparatus. The key input unit 44 corresponds to, for example, operation switches provided on the main body of the video recording apparatus or a remote controller. Further, the input unit 44 may be a personal computer connected to the video recording apparatus according to the embodiment of the present invention using means such as wired communication, wireless communication, optical communication, or infrared communication. Regardless of the form, when the user operates the key input unit 44, recording processing of the input video / audio signal, playback processing of the recorded content, editing processing on the recorded content, and the like are performed. Can be applied.

  The timing at which the microcomputer block 30 controls the disk drive unit 1002, the hard disk drive unit 2001, the data processor unit 1003, the encoder unit 50, and / or the decoder unit 60 is time data from an STC (system time clock) 38. Can be performed based on. Recording and playback operations are normally executed in synchronization with the time clock from the STC 38, but other processes may be executed at a timing independent of the STC 38.

  The decoder unit 60 separates and extracts each pack from a DVD format signal having a pack structure, a memory used when pack separation or other signal processing is performed, and main video data (video packs) separated by the separator. V decoder that decodes the content), an SP decoder that decodes the sub-video data (sub-picture pack content) separated by the separator, and an A decoder that decodes the audio data (audio pack content) separated by the separator Have A video processor is also provided that appropriately synthesizes the decoded sub-video with the decoded main video and outputs the main video with a menu, a highlight button, subtitles, and other sub-videos.

  The output video signal of the decoder unit 60 is input to the video mixing unit 71. In the video mixing unit 71, text data is synthesized. The video mixing unit 71 is also connected to a line that directly takes in signals from the TV tuner 42 and the A / V input unit 41. A frame memory 72 used as a buffer is connected to the video mixing unit 71. When the output of the video mixing unit 71 is an analog output, it is output to the outside via an I / F (interface) 73, and when it is a digital output, it is output to the outside via a digital / analog converter 74.

  The output audio signal of the decoder unit 60 is analog-converted by the digital-analog converter 77 via the selector 76 and output to the outside. The selector 76 is controlled by a select signal from the microcomputer block 30. Thus, the selector 76 can directly select a signal that has passed through the encoder unit 50 when directly monitoring a digital signal from the TV tuner 42 or the A / V input unit 41.

  It should be noted that the formatter 51 of the encoder unit 50 creates segmentation information during recording and periodically sends it to the MPU of the microcomputer block 30 (information at the time of GOP head interrupt, etc.). The segmentation information includes the number of VOBU packs, the end address of the I picture from the beginning of the VOBU, and the playback time of the VOBU. At the same time, information from the aspect information processing unit is sent to the MPU at the start of recording, and the MPU creates VOB stream information (STI). Here, the STI stores resolution data, aspect data, and the like, and at the time of reproduction, each decoder unit is initialized based on this information.

  In the apparatus shown in FIG. 1, one video file is stored on one disc. In order to continue playback without interruption while accessing (seeking) data, a minimum continuous information unit (size) is determined. This unit is called an extent (or CDA). The extent size is, for example, a multiple of an ECC (error correction code) block (32 sectors), and the file system performs recording in units of this extent.

  The data processor unit 1003 receives data in VOBU units from the formatter of the encoder unit 50 and supplies data in extent units to the disk drive unit 1002 or the hard disk drive unit 2001. Further, the MPU of the microcomputer block 30 creates management information necessary for reproducing the recorded data. When the MPU recognizes a data recording end command, it sends the created management information to the data processor unit 1003. Thereby, the management information is recorded on the disc. Therefore, when encoding is performed, the MPU of the microcomputer block 30 receives data unit information (eg, segmentation information) from the encoder unit 50. Further, the MPU of the microcomputer block 30 recognizes management information (file system) read from the optical disk and the hard disk at the start of recording, recognizes an unrecorded area of each disk, and on the disk via the data processor unit 1003. The data recording area is set in.

  Hereinafter, processing of software (microcomputer block 30 and the like) in the present invention will be described.

  The microcomputer block 30 (recording means, rewriting means) refers to the file system read from the pseudo-rewritable recordable medium to be processed, and instructs the recordable medium to record data. For example, in response to a rewrite instruction from the microcomputer block 30, the disk drive unit 1002 (recording means, rewriting means) executes a pseudo rewrite process as follows.

  When the microcomputer block 30 instructs rewriting (writing rewrite data) to the first recorded data area of the write-once medium, the disk drive unit 1002 stores data that is different from the first area. Data is recorded in the second area of the recording. Further, the disk drive unit 1002 records management information in which the address of the first area and the address of the second area are associated with the management area of the write-once medium. When the microcomputer block 30 tries to read data from the first area, the disk drive unit 1002 responds to the data from the second area instead of the first area based on management information. Read. Thereby, the write-once medium can be handled like a rewritable medium.

  In the pseudo-rewriting process described above, the disk drive unit 1002 automatically selects a second area for recording rewrite data from the free areas remaining on the write-once medium. For example, the disk drive unit 1002 always manages the NWA1, records the rewrite data in the area indicated by the NWA1 (in this case, the second area), and updates the NWA1 to the NWA2. Furthermore, when recording new data or rewrite data, the disk drive unit 1002 records the new data or rewrite data in the area indicated by NWA2.

  If the microcomputer block 30 (software) does not accurately manage the NWA, the free space of the write-once media managed by the microcomputer block 30 (software) and the free space of the actual write-once media Will be in a different state.

  For example, as shown in FIG. 2, when data is recorded in order from the top of a write-once medium, if a rewrite (pseudo-rewrite) occurs once in the middle, the disk drive unit 1002 causes a part of an empty area (NWA Rewrite data is recorded in the area indicated by. At this point, the free space of the write-once medium managed by the microcomputer block 30 (software) is different from the free space of the actual write-once medium. That is, the microcomputer block 30 manages the data recorded area in which the rewrite data is recorded as a free area. For this reason, after the occurrence of pseudo-rewriting, a new data recording instruction from the microcomputer block 30 becomes a recording instruction to the data recorded area, and the disk drive unit 1002 processes the new data recording instruction by pseudo-rewriting. It will be. That is, there is a possibility that the recording of new data after the occurrence of the pseudo-rewrite becomes a pseudo-rewrite process. In this way, pseudo-rewriting occurs frequently.

  Therefore, the microcomputer block 30 of the recording / reproducing apparatus of this embodiment reconfirms the free space when writing new data to the write-once medium, and the free space managed by the microcomputer block 30 and the actual space are checked. Consistency with the free area is instructed, and an instruction to write new data to the actual free area is given. Thereby, generation | occurrence | production of pseudo-rewriting can be suppressed.

  For this purpose, the microcomputer block 30 of the recording / reproducing apparatus of the present embodiment accurately manages the NWA. Thereby, as shown in FIG. 3, the frequent occurrence of pseudo-rewriting can be suppressed.

  As shown in FIG. 3, the microcomputer block 30 refers to the file system read from the pseudo-rewritable write-once medium to be processed, and records data in order from the top of the write-once medium. For example, the microcomputer block 30 instructs the recording of the first data, and in response to this, the disk drive unit 1002 records the first data in the first area of the write-once medium. Further, the microcomputer block 30 and the disk drive unit 1002 manage the address of the second area of the write-once medium as NWA1. The second area is, for example, the area next to the first area.

  Subsequently, when the microcomputer block 30 instructs to rewrite the first data, the disk drive unit 1002 correspondingly corresponds to the first data corresponding to the first data for the second area indicated by NWA1. One rewrite data is recorded, and management data for converting access to the first area into access to the second area is recorded in the management area of the write-once medium. Further, the microcomputer block 30 and the disk drive unit 1002 manage the address of the third area of the write-once medium as NWA2. The third region is, for example, a region next to the second region.

  Subsequently, when the microcomputer block 30 instructs the recording of the second data on the write-once medium, the microcomputer block 30 manages the correct NWA (NWA2), so the microcomputer block 30 The recording of the second data is instructed. In response to this, the disk drive unit 1002 records the second data in the third area indicated by NWA2. Further, the microcomputer block 30 and the disk drive unit 1002 manage the address of the fourth area of the write-once medium as NWA3. The fourth region is, for example, a region next to the third region.

  In this way, not only the disk drive unit 1002 but also the microcomputer block 30 accurately manages the NWA, so that the free space of the write-once medium managed by the microcomputer block 30 (software) is actually 2 can be made to coincide with the free space of the write-once medium, and the frequent occurrence of pseudo-rewriting shown in FIG. 2 can be suppressed.

  Furthermore, the microcomputer block 30 of the recording / reproducing apparatus of this embodiment uses the buffer memory 52 to efficiently write new data and rewrite data to the write-once medium. As a result, the number of times of writing to the write-once medium can be suppressed, and useless consumption of the write-once medium can be suppressed.

  With reference to the flowchart shown in FIG. 4, the recording process of new data or rewrite data will be described.

  When recording data on a pseudo-rewritable write-once medium, the microcomputer block 30 of the recording / reproducing apparatus first uses the information on the write-once medium to determine the type of recorded data (ST101).

  When the microcomputer block 30 determines that the recording data is new recording data (ST101, YES), the recording position of the recording data (recording position on the write-once medium) is acquired and managed based on the managed NWA. The recording position (recording position on the new data buffer) of the recording data is acquired based on the NWS (Next Writable sector) (ST102), and the recording data is recorded in the new data buffer (ST103). If the microcomputer block 30 determines that the recording data is rewritten recording data (ST101, NO), the recording position of the recording data is acquired based on the managed NWA, and the recording data is written to the rewriting data buffer ( ST109). The buffer memory 52 includes a new data buffer (first memory area) and a rewritten data buffer (second memory area).

  First, recording of new recording data will be described. For example, as shown in FIG. 5, the size of the new data buffer is the same size as the write unit (1 ECC block = 32 sectors) on the write-once medium. In the write-once medium, the recordable part is limited to the ECC block next to the recorded area. For this reason, the microcomputer block 30 records the recording contents of one ECC block from the NWA in the write-once medium in the new data buffer. The recording unit of recording data for the new data buffer is 1 sector.

  The conditions under which the recording content of the new data buffer is recorded on the write-once medium are as follows.

(1) When the new data buffer is filled with recording data When the new data buffer is filled with recording data (ST104, NO), that is, when recording data for one ECC block is recorded in the new data buffer At that time, the recording data of the new data buffer is recorded in one ECC block of the medium (ST105). Thereafter, the new data buffer is used as a buffer for recording in the next ECC block.

(2) When a medium is taken out When the processing for the medium is closed by taking out the medium or the like, the recording data in the new data buffer is recorded on the medium. At this time, regardless of the size of the recording data stored in the new data buffer, the recording data stored in the new data buffer is processed into data of 1 ECC block size, and the processed 1 ECC block size data is converted to 1 ECC of the medium. Recorded in the block.

(3) When pseudo rewrite processing is required for media When pseudo rewrite processing is required for media, the recording data in the new data buffer is recorded on the media before the pseudo rewrite processing. That is, the recording data of the new data buffer is recorded on the medium before the NWA is changed. At this time, regardless of the size of the recording data stored in the new data buffer, the recording data stored in the new data buffer is processed into data of 1 ECC block size, and the processed 1 ECC block size data is converted to 1 ECC of the medium. Recorded in the block. For this reason, if pseudo-rewriting occurs frequently, the use efficiency of the write-once medium decreases. For this reason, the microcomputer block 30 of the recording / reproducing apparatus of this embodiment accurately manages NWA, and uses a new data buffer and a rewritten data buffer separately to suppress frequent occurrence of pseudo-rewriting.

  Next, recording of rewrite recording data will be described. As shown in FIG. 6, rewrite recording data is recorded in the rewrite data buffer in units of one sector. The conditions under which the recording contents of the rewritable data buffer are recorded on the write-once medium are as follows. As described above, before recording the recording data recorded in the rewritable data buffer on the write-once medium, if the recording data is recorded in the new data buffer, it is recorded in the new data buffer. The recorded data is recorded on a write-once medium first.

(1) When the rewrite data buffer is filled with recording data The rewriting data buffer is filled with recording data, and no further recording data can be recorded in the rewriting data buffer (NO in ST106). If the recording data is recorded in the new data buffer, the recording data recorded in the new data buffer is first recorded on the write-once medium (ST107). Thereafter, the oldest recording data stored in the rewrite data buffer is recorded on the write-once medium (ST108). At that time, the recording data in the same ECC block as the oldest recording data is simultaneously recorded on the write-once medium (see FIG. 7). That is, ECC block data is generated from these recording data, and the ECC block data is recorded on the write-once medium. Of the recorded data stored in the rewritable data buffer, the recorded data recorded on the write-once medium can be overwritten, and if there is rewritable recorded data to be stored in the rewritable data buffer, this stored data is stored. The rewritable recording data is overwritten on the recording data already recorded on the write-once medium (ST109).

(2) When the media is taken out As with the new data buffer, when the processing for the media is closed by taking out the media and the recording data is recorded in the new data buffer, Recording data recorded in the new data buffer is recorded on the write-once medium first. Thereafter, the recording data stored in the rewrite data buffer is recorded on the write-once medium.

  As described above, when the new data buffer and the rewrite data buffer are not used, that is, when the new record data and the rewrite data are handled by one buffer, new record data less than one ECC block is accumulated in the buffer. If rewrite data to be stored in the buffer is generated in this state, immediately, new recording data that is less than one ECC block stored in the buffer is processed into one ECC block data, and the processed one ECC block data is write-once type. The media must be recorded and the buffer must be freed for rewrite data. In this case, the recording efficiency is poor.

  On the other hand, as described above, by using the new data buffer and the rewrite data buffer, the new recording data and the rewriting data can be stored simultaneously, and the recording efficiency can be improved.

  Next, the suppression of frequent occurrences of pseudo-rewriting for zone-controlled write-once media will be described. There are two types of once-write media: a type in which data is recorded in order from the beginning of the recording area, and a type in which the recording area is divided into a plurality of zones and each zone is used according to the application. The recording / reproducing apparatus according to the present embodiment can more effectively suppress the frequent occurrence of pseudo-rewriting with respect to the write-once media that are zone-managed.

  For example, when a file system of UDF2.50 or higher is used, it has a metadata partition as a file management structure. This file management structure is also used in the pseudo-rewrite method (UDF2.60). For this reason, when using the data management method according to the present embodiment (the method for managing the newly recorded data and the rewrite data separately as described above), the metadata partition use is separate from the normal partition buffer. Need to have a buffer.

  Therefore, for example, as shown in FIG. 8, a write-once medium divided and managed in two zones (partitions 1 and 2) is assumed. One zone (partition 1 or 2) corresponds to the normal partition described above, and the other zone (partition 2 or 1) corresponds to the metadata partition described above. In this case, the buffer memory 52 of the recording / reproducing apparatus includes a new data buffer B11 for partition 1 (first memory area), a rewrite data buffer B12 for partition 1 (second memory area), and a partition 2 buffer. A new data buffer B21 (third memory area) and a rewrite data buffer B22 for partition 2 (fourth memory area).

  As a result, new recording data and rewrite data for partition 1 can be stored simultaneously, and new recording data and rewrite data for partition 2 can be stored simultaneously, and recording efficiency can be improved.

  Hereinafter, the effects of the present embodiment will be summarized.

  (1) By using the new data buffer and the rewrite buffer, new recording data and rewrite data can be stored simultaneously. As a result, it is possible to avoid a situation where data that is less than the recording unit must be processed and recorded into data in the recording unit. As a result, the number of times of writing (number of times of writing new recording data, rewriting data (Number of times of writing) can be reduced.

  (2) Accurately grasp the writing position (NWA) of the new recording data and instruct the writing of the new recording data to the correct writing position (NWA) before rewriting the recorded data. As a result, the new recording data can be recorded at the correct writing position (NWA) without replacing the recording of the new recording data with the pseudo rewriting (without causing the pseudo rewriting).

  As described above, it is possible to increase the read / write time for the pseudo-rewritable write-once medium.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. In addition, the embodiments may be appropriately combined as much as possible, and in that case, the combined effect can be obtained. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the column of the effect of the invention Can be obtained as an invention.

30 ... Microcomputer block, 52 ... Buffer memory, 1002 ... Disk drive unit

Claims (6)

Instructing the recording of the first new data on the write-once medium, recording the first new data on the first recording area of the write-once medium, and the address of the second recording area of the write-once medium Recording means for managing as a first next recording address;
Rewriting of the first new data is instructed, rewriting data corresponding to the first new data is recorded in the second recording area indicated by the first next recording address, and the first Management data for converting access to the recording area to access to the second recording area is recorded in the management area of the write-once medium, and the address of the third recording area of the write-once medium is second Rewriting means managed as a recording address;
With
The recording means instructs the third recording area indicated by the second next recording address to record second new data, and the second new data is recorded to the third recording area. Record data,
An information recording apparatus characterized by that. A first buffer for buffering the first or second new data;
A second buffer for buffering the rewrite data;
The information recording apparatus according to claim 1, further comprising: The recording control means records the first buffering data on the write-once medium when the first buffering data of the first buffer reaches a predetermined size,
The rewrite control unit records the second buffering data on the write-once medium when the second buffering data of the second buffer reaches a predetermined size;
The information recording apparatus according to claim 2.   If the second buffering data has reached a predetermined size even if the first buffering data has not reached a predetermined size, the recording control means may perform the second buffering by the rewrite control means. 4. The information recording apparatus according to claim 3, wherein the first buffering data is processed into data of a predetermined size and recorded on the write-once medium before recording the ring data. A first buffer for buffering the first or second new data for recording in a first zone of the write-once medium;
A second buffer for buffering the first rewritable data for recording in the first zone of the write-once medium;
A third buffer for buffering third new data to be recorded in the second zone of the write-once medium;
A fourth buffer for buffering second rewritable data for recording in the second zone of the write-once medium;
The information recording apparatus according to claim 1, further comprising: Instructing recording of the first new data on the write-once medium, recording the first new data on the first recording area of the write-once medium, and the address of the second recording area of the write-once medium As the first next recording address,
Rewriting of the first new data is instructed, rewriting data corresponding to the first new data is recorded in the second recording area indicated by the first next recording address, and the first Management data for converting access to the recording area to access to the second recording area is recorded in the management area of the write-once medium, and the address of the third recording area of the write-once medium is second Managed as a recording address,
Instructing the third recording area indicated by the second next recording address to record second new data, and recording the second new data in the third recording area;
An information recording method characterized by the above.

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