JP2009015887A - Information recording and playback apparatus and data management method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information recording and playback apparatus that allows a recording medium to be used efficiently by averaging the use of a recording area in recording information in a recording apparatus with a large recording capacity. <P>SOLUTION: The information recording and playback apparatus includes a recording apparatus 201 that has a first recording area and a second recording area different from the first recording area and stores video and audio data, a chapter setting processing section 80 that separates inputted target recording information into data of a main part and data of an attached part attached to the main part, and a recording control section 30 that records the data of the main part and the data of the attached part which are separated by a boundary setting section in the first recording area and the second recording area of the recording apparatus respectively, so that it is possible to use the recording apparatus efficiently regardless of the type of image to be recorded. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an information recording / reproducing apparatus for recording information including a video signal and an audio signal distributed by a public broadcast or a cable network supplied from a ground wave or a broadcasting satellite, and reproducing the already recorded information. The present invention relates to a data management method.

  TV receivers that receive and play back video information (video signals) and audio signals (audio signals), recording and playback devices (video recorders) and video imaging devices (video cameras) that can record and store received video and audio The spread and development of this is remarkable. In addition, even in personal computers, there are many cases where a function for receiving a television broadcast and reproducing video and audio is already provided as a standard specification.

  In recording such a large amount of information, improvement in recording capacity and cost reduction of a recording device represented by a hard disk device also greatly contribute.

  However, as the capacity of the recording apparatus increases, more information is recorded (stored), and recording is performed in different recording areas for each type of information, and can be continuously reproduced for each type of information during playback. Has already been put to practical use.

For example, in Patent Document 1, a CM (commercial message) is detected from a change in an audio signal of a broadcast wave received by a receiving unit, stored separately from the main part, and after reproducing the main part continuously during playback. A recording / playback apparatus for playing a CM is disclosed.
JP 2002-135728 A

  However, in the above-mentioned document, there is a description that “the recording medium is divided into a recording area for recording commercial message broadcasts and a recording area for recording other broadcast waves”. When a hard disk device having a large recording capacity is used, it is expected that recording on a specific recording area of the hard disk device and reproduction from that area will be repeated.

That is, even in a hard disk device, frequent repetitive recording and reproduction with respect to a part of the recording area leads to deterioration of the recording area, and recording to a part of the recording area is sufficient although the remaining recording capacity is sufficient. It may be difficult to perform recording, and it is preferable to record in a plurality of locations in the recording area. On the other hand, if there are too many dispersed locations, not only will the time required to move the recording / reproducing head during seek / access increase, but also the unrecorded area will spread over a wide area, increasing the burden on the recording / reproducing head and its drive mechanism. Will do.
SUMMARY OF THE INVENTION An object of the present invention is to efficiently use a recording apparatus regardless of the type of video to be recorded by averaging recording areas used for recording information in a recording apparatus having a large recording capacity. It is to provide a possible information recording / reproducing apparatus.

  The present invention has been made based on the above problems, and has a recording device that has a second recording area different from the first recording area and the first recording area and holds video and audio data. The data to be recorded is divided into main part data and accessory part data attached to the main part, and the main part data and the accessory part data divided by the boundary setting part are respectively described above. An information recording / reproducing apparatus having a recording control unit for recording in a first recording area and a second recording area of a recording apparatus.

  By using one embodiment of the present invention, when data is recorded on a recording medium having a large recording capacity such as a hard disk, the recording position at the time of data recording is changed in the recording area, so that the fragment in the hard disk Can be suppressed, and the occurrence of a small capacity free extent that cannot be used for recording purposes can be suppressed. Thereby, the capacity (usable capacity) that can be recorded on the hard disk can be improved.

  In addition, by averaging the recording amount, it becomes possible to efficiently use a recording medium having a large recording capacity represented by a hard disk (HDD) regardless of the type and size of the video to be recorded.

  Further, in information recording and reproduction, frequent access in a specific recording area close to the head of the recording area is alleviated, and deterioration of a part of the recording area is also suppressed.

  Embodiments of the present invention will be described below 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, the recording medium is shown as an apparatus (DVD-VR recorder with HDD) that can handle both an optical disk such as a DVD-R and a hard disk. However, a semiconductor memory or the like is appropriately used as the recording medium. May be.

  The video recording apparatus (information recording / reproducing apparatus) in FIG. 1 has two types of disk drive units. In FIG. 1, the left side shows the main blocks of the recording unit, and the right side shows the main blocks of the playback unit.

  A video recording apparatus 1 shown in FIG. 1 includes a disk drive unit 101 that executes writing of information on an optical disk M as a first medium, which is an information recording medium capable of constructing a video file, and reproduction of information from the optical disk M; It has a hard disk drive unit (HDD) 201 that executes writing of information to a hard disk as a second medium and reproduction of information from the hard disk. As the optical disk M, “-RAM” and “± RW” that can be arbitrarily rewritten in each of the HD (High Definition) DVD standard and the DVD standard, and “± R” that cannot be rewritten but can be recorded. For example, -DL having two recording layers and a further increased recording capacity can be used. The disk drive unit 101 emits a rotation control system for the optical disk M, a laser drive system (not shown, but a red laser element that emits red light having a wavelength of 650 nm, or blue light having a wavelength of 405 nm or less. A blue laser) and an optical system.

  The video recording apparatus 1 also includes a data processor unit 111 that supplies recording data to the disk drive unit 101 and the hard disk drive unit 201 and receives signals reproduced by the respective drive units. The data processor unit 111 handles data for recording and reproduction units, and includes a buffer circuit, a modulation / demodulation circuit, an error correction unit, etc., although not described in detail.

  The video recording apparatus 1 includes an encoder unit 50 that constitutes a recording side, a decoder unit 60 that constitutes a reproduction side, and a main control block (MPU (microprocessing unit) or CPU (central processing unit) that controls the operation of the apparatus body. 30) (which may be referred to as a system control unit).

  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 format of the HD DVD standard or the DVD standard by a formatter 51 including a buffer memory and supplied to the data processor unit 111. The encoder unit 50 receives an external analog video signal and an external analog audio signal from the A / V (A, audio / V, video) input unit 41 or an analog video signal and an analog audio signal from the TV tuner unit 42. The

  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 analog-digital converted digital video signal and audio signal 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. In the encoder unit 50, 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 digital audio signal of linear PCM.

  In the video encoder included in the encoder unit 50, when the sub video signal is further input to the AV input unit 41 from, for example, a DVD video player with an independent output terminal for the sub video signal, or such a data configuration is used. When the TV tuner unit 42 receives the DVD video signal as a broadcast wave, the sub video signal in the DVD video signal is encoded (run-length encoded) by the sub video encoder, and a sub video bitmap is obtained.

  The encoded digital video signal, digital audio signal, and sub-picture data are packed by the formatter 51 as a video pack, an audio pack, and a sub-picture pack. The individual packs are further assembled and converted into a format defined by the DVD-video standard (DVD video format) or a format defined by the DVD-recording standard (DVD-VR format).

  In the video recording apparatus 1 shown in FIG. 1, the information formatted by the formatter 51 (packs of video, audio, sub-video data, etc.) and the created management information are sent via the data processor unit 111 to the hard disk drive unit 201. Alternatively, it can be supplied to the disk drive unit 101 and recorded on a hard disk (HDD) or optical disk M. Information recorded on the hard disk (HDD) or the optical disk M can also be recorded on the optical disk M or the hard disk via the data processor unit 111 and the disk drive unit 101. It is also possible to perform an editing process such as deleting a part of a video object of a program recorded on a hard disk (HDD) or an optical disk M, or connecting different video objects.

  Although not described in detail, the main control block (system control unit) 30 includes an MPU or CPU, a firmware ROM in which a control program or the like (firmware or the like for performing control described in each flowchart), and a program are written. This includes a work RAM (SDRAM (Synchronous Dynamic Random Access Memory)) that provides a work area necessary for execution. The MPU of the main control block 30 uses a RAM as a work area according to a control program stored in the firmware ROM, detects a defect location, detects an unrecorded area, sets recording information recording position, UDF recording, AV address setting, history Execute information retrieval processing.

  That is, the main control 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 (total video management information) 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. The main control block 30 further includes a file entry management unit 301, and the file entry management unit 301 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 main control block 30, contents to be notified to the user are displayed on the display unit 43 provided integrally with the video recording apparatus 1 or on a monitor display 75 connected to the video recording apparatus 1. OSD (On Screen Display) is displayed.

  The main control block 30 has a key input unit 44 for inputting an operation signal for operating the video recording apparatus 1. The key input unit 44 corresponds to, for example, operation switches provided on the main body of the video recording apparatus or a remote control device. Further, the key input unit 44 may be a personal computer (PC) connected by means of wired communication, wireless communication, optical communication, infrared communication, or the like. In any form, the user operates the key input unit 44 to perform recording processing of the input video / audio signal, playback processing of the recorded content, or editing processing on the recorded content. Can do.

  The timing at which the main control block 30 controls the disk drive unit 111, the hard disk drive unit 201, the data processor unit 111, the encoder unit 50, and / or the decoder unit 60 is from an STC (System Time Clock) 38. It is defined based on the time data. The 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 individual packs from a DVD format signal having a pack structure, a memory used when performing pack separation and other signal processing, and main video data (video) separated by the separator. V (Video, video) decoder that decodes (pack contents), SP (Sub Pack) decoder that decodes sub-picture data (sub-picture pack contents) separated by a separator, and separator An A (Audio) decoder that decodes audio data (contents of the audio pack). Although not described in detail, the decoder unit 60 appropriately synthesizes the decoded sub-video with the decoded main video, and superimposes the menu, highlight button, subtitles, and other sub-videos on the main video and outputs the video processor. It has.

  The output video signal of the decoder unit 60 is input to a video mixing (V 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. Further, when the output of the video mixing unit 71 is an analog output, it is externally output via an I / F (interface) 73, and when it is a digital output, it is externally output via a digital-analog (D / A) converter 74. Is output.

  The output audio signal of the decoder unit 60 is converted into an analog signal by a digital-analog converter (D / A) 77 via a selector 76 and output to the outside. The selector 76 is controlled by a select signal from the main control block 30. 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.

  Note that the formatter 51 of the encoder unit 50 creates each segmentation information during recording and periodically sends it to the MPU of the main control 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). Note that the STI stores resolution data, aspect data, and the like, and at the time of reproduction, initial setting is performed in each decoder unit based on this information (STI).

  In the video recording apparatus 1 shown in FIG. 1, one video file is stored on one disc. On the other hand, a minimum continuous information unit (size) is determined in order to continue reproduction without interruption while accessing (seeking) data. This unit is called an extent (or CDA). The extent size is, for example, a multiple of an ECC (error correction code) block (16 sectors), and the file system performs recording in units of this extent.

  The data processor unit 111 receives data in VOBU units from the formatter 51 of the encoder unit 50 and supplies data in extent units to the disk drive unit 101 or the hard disk drive unit 201.

  On the other hand, the MPU of the main control block 30 creates management information necessary for reproducing the recorded data, and sends the created management information to the data processor unit 111 when the data recording end command is recognized. Thereby, management information is recorded on the hard disk / optical disk. Accordingly, when encoding is being performed, the MPU of the main control block 30 receives data unit information (eg, segmentation information) from the encoder unit 50.

  The MPU of the main control block 30 recognizes management information (file system) read from a recording target (namely, an optical disk or a hard disk) at the start of recording, recognizes an unrecorded area of each disk, and the data processor unit 111. A data recording area is set on the disc (to be recorded) via

  In the video recording apparatus 1, for example, when a recorded target is an arbitrary program of a television broadcast, and a recorded television program is reproduced, for example, a part attached to a main part such as a CM (commercial message) It is desired to reproduce the main part continuously by reproducing the main part independently of the main part. For this reason, the main control block 30 further includes a chapter boundary setting processing unit 80 described later with reference to FIGS. 2 to 5 for extracting “CM part”, which is information other than “main part”. It is connected.

  By the way, in the video recording apparatus 1 described above, when video is recorded, for example, when video and audio data are recorded on a rewritable data recording medium such as a hard disk unit (HDD) 201 or repeatedly reproduced, a specific recording area is used. The recording area may be deteriorated by being accessed frequently. Also, when playing back recorded TV programs, it is desired to play back the main part continuously by playing the part attached to the main part such as CM (Commercial Message) independently from the main part. Has been. It is possible to delete a part attached to the main part such as a CM from a recorded TV program. In that case, however, a relatively short recording area (recordable area remaining when the CM is excluded) is provided. There are a plurality of points, and the data in the HDD is managed in a complicated state. This increases the burden on the recording / reproducing head and its driving mechanism when seeking / accessing the hard disk.

  From such a background, when recording a video, by analyzing the video / audio, for example, a CM (commercial message) is extracted, and the main part and the CM part are extracted to the hard disk in the hard disk drive unit (HDD) 201. By dividing and recording (parts attached to the main part), it is possible to reduce the time during which the recording / reproducing head is moved when the main part is continuously reproduced, and the recording / reproducing head and its driving mechanism can be used. The burden can be suppressed.

  However, in many cases, the main part and the part attached to the main part are greatly different in length (temporal ratio), and in normal playback, a specific recording area (main part) is frequently used. Since the recording area is accessed, the recording area in which the main part is recorded is deteriorated, resulting in non-uniformity (non-averaging) of the recorded recording area. Therefore, when actually recording video, the recording area of the hard disk is divided into a plurality of, for example, two in advance, and the size of the recording area used for recording the main part is equal to that of the pre-allocated recording area. When the percentage of the size exceeds the specified ratio, the recording area allocated to the recording of the main part and the recording area allocated to the recording of the attached part can be interchanged so that the recording area of the hard disk can be used uniformly. Promoted.

  Note that a part attached to the main part such as CM (commercial message) can be easily extracted by a chapter boundary setting processing unit described below with reference to FIGS.

  In FIG. 2, the chapter boundary setting processing unit 80 includes first delimiter information (chapter division points) acquired by the video structuring processing unit 80p and second delimiter information acquired by the arbitrary section detection processing unit 80q ( Based on the arbitrary section information, voice section information, or CM section information), it is detected that “CM” is included. Note that the video structuring processing unit 80 does not adopt the first delimiter information when the first delimiter information exists in an arbitrary section set by the second delimiter information. FIG. 3 shows the main part extracted in order to explain the operation of the chapter boundary setting processing unit 80 described in FIG.

  The arbitrary section detection processing unit 80q shown in FIG.

  The silence detection device 81 detects a portion where the sound level is below a threshold for a predetermined time as a silence portion.

  The silence detection device 81 outputs silence information and supplies it to the silence time recording device 82.

  The silent part time recording device 82 holds silent time information that is information on the time when the silent part in the program is determined.

  The silent time information recorded in the silent time recording device 82 is processed by the silent part interval calculating device 83.

  When the silent part interval calculation device 83 is further blocked, the silent part time interval measuring unit 83a for determining whether the time interval between the silent part and the next silent part is a multiple of a certain time (A), and the time interval If it is a multiple of the fixed time (A), the silent part count processing unit 83b that counts the detection of the silent part, and if the number of silent parts is equal to or greater than the threshold (B), the silent part that appears first and last On the other hand, it includes a silence condition determination unit 83c for setting delimiter information.

  As shown in FIG. 3, an input, that is, a video signal and an audio signal supplied from the A / V input unit 41 or the TEV tuner unit 42 are input to the video structuring processing unit 80p and the arbitrary section detection processing unit 80q.

  The video signal and audio signal input to each of the first delimiter information (referred to as structured information) and the second delimiter information (referred to as arbitrary section information) are included in a chapter boundary setting processing unit 80r. Is input.

  The chapter boundary setting unit 80r obtains third delimiter information obtained by superimposing the first and second delimiter information. However, the chapter division points that meet the predetermined condition are not adopted, and the adopted chapter division points are inserted into the management information of the recording device 13.

  FIG. 23 describes the operation of the chapter boundary setting processing unit 80 in more detail.

  With respect to the time direction (a series of changes in time, usually integration) of an arbitrary program, the video structuring processing unit 80p performs chapter division points (first delimiter information) like c1, c2,..., C5. Is detected.

  On the other hand, in the time direction of the same program, the arbitrary section detection processing unit 80q detects the second delimiter information m1, m2, m3, and m4, and the arbitrary section is between m1 and m2, and between m3 and m4. It is assumed that

  Then, the delimiter information c3 detected by the video structuring processing unit 80p exists in the arbitrary section (m1-m2). In such a case, the delimiter information c3 is not adopted.

  As a result, chapter division points are not added within an arbitrary section (for example, a section in which stereo audio is continuous). The arbitrary section is, for example, a section where the audio mode is continuous without changing, or a section where the stereo mode is continuous. Furthermore, it is a section where audio frequencies within a predetermined band are continuous.

  In the chapter boundary setting processing unit and the arbitrary section detection processing unit shown in FIGS. 2 to 4, as shown in FIG. 5, the arbitrary section detection processing unit 80q can be used for CM section detection.

  For example, it is assumed that a section of m1-m2 and a section of m3-m4 are detected as CM sections. It is assumed that the delimiter information c3 detected by the video structuring processing unit 80p exists in this CM section (m1-m2). In such a case, the delimiter information c3 is not adopted. As a result, chapter division points are not set in the CM section.

  When actually recording a video, the CM portion is detected by the above-described FIGS. 2 to 5, and for example, as shown in FIGS. 6A and 6B, the hard disk drive unit (HDD) divided into two parts is detected. ) Each of a part used for recording the main part in 201 (recording position A of the first recording area) and a part used for recording the attached part (recording area B of the second recording area) The main part and the attached part may be recorded in order.

  More specifically, as shown in FIG. 8, when the hard disk of the hard disk drive unit (HDD) 201 is initialized, an initial recording position is set <81 blocks>. At this time, for example, the recording area is roughly divided into two near the center (center), the top area is the recording area A (first recording area), and the area from the center to the end is the recording area B (second area). Recording area). This state corresponds to FIG.

  Next, for example, the main part is recorded in the first recording area (recording area A) of the recording areas of the hard disk divided into two parts, and the second recording area (recording position B) is attached to the main part. The portion to be recorded may be recorded <82 blocks>. This state corresponds to FIG.

  When there is a request from the user, for example, the attached portion recorded in the recording area B (second recording area) is deleted <83 blocks>. This state corresponds to FIG.

  Hereinafter, in actual video recording, as shown in FIG. 9, according to FIGS. 2 to 5, the main part (the main part data that will surely be reproduced) and the attached part (may not be reproduced in some cases). <91 blocks: analysis of recorded data (main part data / attached data)>.

  Subsequently, based on the determination result <block 92>, the main part and the attached part are recorded at different recording positions based on the attributes (main part / attached) of the respective data <93 blocks (Main part → recording from recording position A), 94 blocks (attached → recording from recording position B)>.

  Thereafter, the program is recorded by repeating <91 blocks> to <94 blocks> until the scheduled recording end time or until the recording stop is instructed (by the user) <95 blocks>.

  By this method, the data of the main part and the data of the attached part can be recorded together in one place. In addition, even when the attached data is deleted, the remaining data in the hard disk recording area is prevented from being divided (subdivided) into small pieces and relatively short recording areas. .

  FIG. 10 shows an example of another embodiment of the recording operation shown in FIG.

  Although the recording area of the hard disk drive unit (HDD) 201 is divided into, for example, two parts and the main part and the attached part are separately recorded using FIG. 8 and FIG. In this case, the main part and the part attached to the main part are greatly different in length (temporal ratio), and a specific recording area (main part) is frequently accessed during normal playback. For this reason, it is known that the recording area in which the main part is recorded deteriorates (non-averaged) in the recorded recording area.

  For this reason, as shown in FIG. 10, when actually recording a video, the recording area of the hard disk in the hard disk drive (HDD) unit 201 is divided into, for example, two parts and used for recording the main part. When the ratio of the size of the recording area to the size of the recording area A (first recording area) allocated in advance exceeds a predetermined ratio or a preset threshold value, the main part is recorded. The assigned recording area (recording area A) and the attached recording area (recording area B) are switched (hereinafter, the main part is recorded in the recording area B, and the attached part is recorded in the recording area A). This facilitates uniform use of the recording area of the hard disk.

  More specifically, in <95 block> of FIG. 9, the amount of data recorded in each recording area (recording area A, recording area B) is calculated when the designated recording operation is completed. <101 block: calculation of the recording amount at the recording positions A and B>, when it is determined that the deviation of the recording amount (use ratio (or occupation amount) or remaining recordable amount) is larger than a predetermined value < Block 102: The recording capacity usage ratio at the recording position A and the recording position B is more than a certain deviation>, data recorded at the recording position A and data recorded at the recording position B from the subsequent (next) recording <103 block: exchange recording positions A and B> makes it possible to suppress non-uniformity (non-averaging) of recorded recording areas, ie, occurrence of bias.

  As shown in FIGS. 7A to 7C, recording capacity thresholds Ca and Cb are set for the recording position A (first recording area) and the recording position B (second recording area), respectively. As shown in FIG. 11, at the end of the previous recording (recording), the recorded amount at each of the recording position A and the recording position B is calculated <block 111: the recording amount at the recording positions A and B is calculated. > When the total recording amount is equal to or greater than the threshold value <112 block: the recording amount at the recording position A is equal to or greater than the threshold value Ca> or <113 block: the recording amount at the recording position B is equal to or greater than the threshold value Cb When it is detected that b) corresponds)>, the recording position A and the recording position B at the time of the next recording are exchanged <block 114: exchange the recording positions A and B>. .

  In this case, when recording (recording) is subsequently repeated, the threshold Cb moved in the recording area A in association with the recording area B, and the threshold Ca moved in the recording area B in association with the recording area A This further suppresses the occurrence of bias in the recording amount (usage ratio (or occupation amount) or remaining recordable amount) of each recording area.

  In other words, the recording capacity can be averaged between the recording position A and the recording position B also by the method shown in FIG.

  As described above, according to the embodiment of the present invention, when data is recorded on a recording medium having a large recording capacity such as a hard disk, the recording position at the time of data recording is changed in the recording area. It is possible to suppress internal fragments, and it is possible to suppress the occurrence of a small capacity free extent that cannot be used for recording purposes. Thereby, the capacity (usable capacity) that can be recorded on the hard disk can be improved.

  In addition, by averaging the recording amount, it becomes possible to efficiently use a recording medium having a large recording capacity represented by a hard disk (HDD) regardless of the type and size of the video to be recorded.

  Further, in information recording and reproduction, frequent access in a specific recording area close to the head of the recording area is alleviated, and deterioration of a part of the recording area is also suppressed.

  It should be noted that the content of the present invention is not limited to the form described here, and it goes without saying that various other forms can be taken without departing from the spirit of the invention. In addition, the embodiments may be implemented by appropriately combining them as much as possible, or by deleting a part thereof, and in that case, various effects resulting from the combination or deletion can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS Schematic which shows an example of the information recording / reproducing apparatus with which embodiment of this invention is applied. Schematic which shows an example of embodiment of the chapter boundary setting process part integrated in the video recording device shown in FIG. FIG. 3 is a schematic diagram illustrating an example of a segmentation method (for one program) by the chapter boundary setting processing unit illustrated in FIG. 2. FIG. 4 is a schematic diagram for explaining another example of a segmentation method (for one program) by the chapter boundary setting processing unit shown in FIG. 3. FIG. 5 is a schematic diagram illustrating still another example of a method of segmentation (for one program) by the chapter boundary setting processing unit illustrated in FIG. 4. In the information recording / reproducing apparatus shown in FIG. 1, the recording area in the HDD (hard disk drive) is divided into a plurality (for example, two), and the main part (of the program to be recorded) and the attached part are respectively recorded. The schematic diagram which shows typically the state divided and recorded in. In the information recording / reproducing apparatus shown in FIG. 1, the recording area in the HDD (hard disk drive) is divided into a plurality (for example, two), and the main part (of the program to be recorded) and the attached part are respectively recorded. The schematic diagram which shows typically the example which suppresses the nonuniformity of the usage rate for every recording area by changing a recording area while recording by classifying. Schematic explaining an example of a procedure for dividing (classifying) the recording area in the hard disk shown in FIG. Schematic explaining an example of a procedure for recording information (data) in a recording area in a hard disk divided (divided) by the procedure shown in FIG. FIG. 9 is a schematic diagram for explaining an example of a procedure for changing a recording area following recording of information (data) in a recording area in an information segmented (divided) hard disk recorded by the procedure shown in FIG. 8. FIG. 9 is a schematic diagram for explaining another example of a procedure for changing a recording area following recording of information (data) in a recording area in an information segmented (divided) hard disk recorded by the procedure shown in FIG. 8.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Information recording / reproducing apparatus (video recording device), 30 ... Main control block (system control part), 38 ... STC (system time clock), 41 ... A / V input part, 42 ... Tuner part, 50 ... Encoder part, DESCRIPTION OF SYMBOLS 60 ... Decoder part, 80 ... Chapter boundary setting process part, 80p ... Video structure process part, 80q ... Arbitrary section detection process part, 101 ... Disk drive part, 111 ... Data processor part, 201 ... Hard disk drive (HDD) part.

Claims (7)

A recording apparatus having a second recording area different from the first recording area and the first recording area and holding video and audio data;
A boundary setting unit that divides the input recording target information into data of the main part and data of the attached part attached to the main part;
A recording control unit for recording the data of the main part and the data of the attached part divided by the boundary setting unit in the first recording area and the second recording area of the recording device, respectively;
An information recording / reproducing apparatus comprising:   2. The information recording according to claim 1, wherein data of a main part is recorded in a first recording area of the recording apparatus, and data of an attached part is recorded in a second recording area of the recording apparatus. Playback device.   3. The information according to claim 1, wherein the first recording area and the second recording area of the recording apparatus are exchanged based on an amount of data recorded in at least one of the recording areas. Recording / playback device.   Each of the first recording area and the second recording area of the recording apparatus has a recording data amount threshold value with respect to a recordable recording capacity, and when the data recorded in any recording area reaches the threshold value 4. The information recording / reproducing apparatus according to claim 3, wherein the first recording area and the second recording area of the recording apparatus are exchanged. Initialize the recording area of the recording medium,
The initialized recording area is divided into manageable areas as at least two recording areas,
Identify the data to be recorded into a first data group and a second data group attached to the first data group,
A data management method comprising: sequentially recording each identified data group in two divided recording areas.   The data divided into the first data group and the second data group includes a recording area that has been recorded so far when the amount of data recorded in at least one recording area reaches a predetermined size. 6. The data management method according to claim 5, wherein the data is recorded in different recording areas.   Each recording area has a recording data amount threshold value with respect to the recordable recording capacity. When the recording data amount recorded in any recording area reaches the threshold value, the first data group and the second data group are recorded. 6. The data management method according to claim 5, wherein the recording area in which the data group is recorded is exchanged.

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