JP2008278334A - Recorder, control method of recorder, program and storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To arrange a moving image data-recording area so as to enable seamless reproduction in a recording medium. <P>SOLUTION: This recorder first discriminates reproduced data of a data-recording area recorded in the recording medium by a reproduction control means and a data discriminating means. The recording control means also determines whether to secure a blank data recording area of a predetermined size, after a data-recording area recorded in the recording medium, on the basis of the result of the discrimination and secures a blank recording area for recording moving image data. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a recording apparatus using a recording medium such as a magneto-optical disk, a control method for the recording apparatus, a program, and a storage medium.

  An image recording apparatus and an image reproducing apparatus for recording or reproducing still image data and / or moving image data using an optical disk recording medium such as a DVD disk or a Blu-ray (registered trademark) disk as a recording medium have been proposed. Yes. The optical disk recording medium used in these devices has a disadvantage that the seek speed is lower than that of, for example, a hard disk (hereinafter referred to as HDD). It is necessary to continuously reproduce (hereinafter, seamless reproduction) the moving image data recorded on these optical disc recording media without causing a failure such as freeze (the movement of the image stops). For this purpose, moving image data to be reproduced needs to be continuously recorded on the optical disc recording medium. Furthermore, when moving image data is distributed and recorded in a plurality of areas on the disc, the physical arrangement relationship of the plurality of moving image data on the optical disc recording medium becomes important.

  11 and 12 are diagrams showing the arrangement of moving image data recorded on the optical disc at the time of reproduction and the state of the amount of moving image data stored in the buffer.

  (A) and (b) of FIG. 11 are diagrams for explaining an example of arrangement of moving image data when moving image data recorded on a recording medium can be seamlessly reproduced. On the other hand, FIGS. 12A and 12B are diagrams for explaining an example of the arrangement of moving image data when it is impossible to seamlessly reproduce the moving image data recorded on the recording medium. is there.

  In FIG. 11A, moving image data (moving image clip) is recorded on an optical disc in a distributed manner in three recording areas, a moving image data recording area Ma, a moving image data recording area Mb, and a moving image data recording area Mc. It is assumed that In the figure, the left direction is the inner circumference side of the optical disk recording medium, and the right direction is the outer circumference side of the optical disk recording medium. Further, normal recording and reproduction are performed from the inner circumference side to the outer circumference side of the optical disk recording medium. Accordingly, in each data recording area, the inner peripheral side of the optical disk recording medium is the starting end and the outer peripheral side is the end. As shown in FIG. 11A, reproduction of moving image data recorded from the inner periphery side of the optical disk recording medium is started using an optical pickup (not shown). Then, first, in the section (1) of FIG. 11B, the moving image data reproduced from the moving image data recording area Ma is stored in the buffer provided in the reproduction circuit. Then, from the time point S when moving image data of a predetermined amount of data is accumulated in the buffer, the moving image data accumulated in the buffer are sequentially read out, such as demultiplexing and decoding. Decoding processing is started. Then, at an appropriate timing, the image data obtained by the decoding process is supplied to the display device and displayed.

  In this case, when the reading of the moving image data reproduced from the moving image data recording area Ma to the buffer ends at the end of the data recording area, the process proceeds to section (2). Subsequently, decoding processing such as demultiplexing and decoding of the moving image data reproduced from the moving image data recording area Ma is continued. Simultaneously with the decoding process, a seek operation including the movement of the optical pickup to the moving image data recording area Mb is executed. In the seek operation, if the seek speed is high, the seek time is naturally shortened.

  The decoding operation of the moving image data reproduced from the moving image data recording area Ma proceeds, and the seek operation ends before the moving image data reproduced from the moving image data recording area Ma is completely removed from the buffer. Section (3) Migrate to

  In this section (3), the reading of moving image data sequentially reproduced from the beginning of the moving image data recording area Mb into the buffer and the decoding processing of the read moving image data are executed simultaneously. Hereinafter, the section (4) operates in the same manner as the section (2), the section (5) operates in the same manner as the section (3), and the section (6) operates in the same manner as the section (2).

  In this way, in the example shown in FIGS. 11A and 11B, before the moving image data decoding process of the previous moving image data recording area accumulated in the buffer is finished, the next moving image data recording area is processed. The seek operation to the beginning of is completed. Since accumulation of moving image data in the next moving image data recording area is started in the buffer, moving image data can be seamlessly reproduced.

  The amount of moving image data recorded in the moving image data recording area necessary for seamless playback is determined by the bit rate of the moving image data recorded in the moving image data recording area being decoded and the subsequent moving image data recording. The distance to the area is greatly related.

  If the seek time to the beginning of the subsequent moving image data recording area is shorter than a predetermined time, the section (2) shown in the figure is shortened. Therefore, the amount of moving image data recorded in the moving image data recording area currently being decoded may be small. Conversely, if the seek time is longer than a predetermined time, the amount of moving image data recorded in the moving image data recording area currently being decoded must be large.

  Further, if the bit rate of the moving image data recorded in the moving image data recording area currently being decoded is low, the slope of the decrease in the buffer accumulation amount in the section (2) becomes gentle. Therefore, similarly, the data amount of moving image data recorded in the moving image data recording area currently being decoded may be small. Conversely, when the bit rate of the recorded moving image data is high, the amount of moving image data recorded in the moving image data recording area currently being decoded must be large.

  On the other hand, in FIG. 12A, it is assumed that the moving image data is distributed and arranged in the moving image data recording area Ma and the moving image data recording area Mc and is recorded on the optical disc recording medium.

  In this case, similarly to the case of FIG. 11A, the reproduction of the moving image data recorded from the inner peripheral side of the optical disk recording medium is started using the optical pickup. Then, as shown in FIG. 12B, the moving image data sequentially reproduced from the beginning of the moving image data recording area Ma in the section (1) is stored in the buffer of the reproducing circuit. Decoding processing such as demultiplexing and decoding of moving image data is started from time S when a predetermined amount of moving image data is accumulated in the buffer.

  When the reading of the moving image data reproduced from the moving image data recording area Ma into the buffer is completed, the section (2) is entered. A seek operation is performed on the moving image data recording area Mc while performing decoding processing such as demultiplexing and decoding of the moving image data from the moving image data recording area Ma.

  In the example of FIG. 12B, the decoding process of the moving image data reproduced from the moving image data recording area Ma is executed, and the moving image data reproduced from the moving image data recording area Ma is completely lost from the buffer. The seek operation does not end. For this reason, in the section (3), the buffer underflows (data becomes 0), the operation of the decoding process is stopped, and thus the display image of the display device is frozen.

  When entering the section (4), the seek operation is completed, and accumulation of moving image data reproduced from the beginning of the moving image data recording area Mc is started in the buffer, the decoding process is resumed, and at an appropriate timing. The freeze of the playback image is canceled. Hereinafter, the section (5) operates in the same manner as the description of the section (2). If the seek operation to the beginning of the next moving image data recording area is not completed before the decoding of the moving image data stored in the buffer is completed in this way, the moving image data cannot be seamlessly reproduced.

  The situation in which the buffer described above causes underflow naturally occurs when, for example, one or all of the recorded moving image data is deleted in an image capturing device capable of editing moving image data. obtain. Furthermore, in an imaging apparatus capable of recording non-moving image data such as still image data, it may occur when a large number of still images are shot and recorded on a recording medium during shooting of moving images.

  In order to realize seamless playback, regarding the restrictions on the physical arrangement of the recording area of the recording medium, in the DVD video standard, moving image data that guarantees seamless playback is limited to those that are physically arranged continuously. It is prescribed. Further, the DVD video recording (VR) standard defines the minimum size (size) of the recording area of each moving image data in which moving image data is arranged.

  In the BD-ROM (Blu-ray Disc (registered trademark) -ROM) standard, the bit rate of moving image data that guarantees seamless reproduction, the minimum size of the recording area of each moving image data, and the recording area of each moving image data The physical distance is specified.

In order to protect these restrictions with an imaging device capable of recording in real time such as a digital video camera, for example, in Patent Document 1, only moving image data recording areas of a predetermined size or more are selected to record moving image data. A method has been proposed. For example, Patent Document 2 proposes a method of rearranging in a recording area of moving image data of a predetermined size or more by defragmenting recorded moving image data.
JP 2000-013728 A JP 2005-004830 A

  However, the methods disclosed in Patent Documents 1 and 2 cannot cope with the restriction on the distance between two moving image data recording areas that ensure seamless reproduction in the BD-ROM standard, for example. In addition, it is necessary to always arrange the moving image data recording area in consideration of the worst seek operation time, so that the empty data recording area of the recording medium cannot be used efficiently.

  In the method disclosed in Patent Document 1, the minimum recording time is set according to the bit rate of moving image data, the writing of data other than moving image data (for example, still image data) is restricted, and the moving image data is edited. Restrictions such as deletion in are necessary for seamless playback. In addition, the method disclosed in Patent Document 2 has a problem that it may not be effective for a write-once recording medium (a recording medium that can be recorded only once and cannot be rewritten).

  Therefore, an object of the present invention is to provide a recording apparatus capable of recording or rearranging a plurality of moving image data data recording areas so that seamless reproduction is possible on the recording medium. There is to do.

In order to achieve the above object, a recording apparatus according to an embodiment of the present invention includes:
A recording device for recording data on a recording medium,
Recording control means;
Disc control means for controlling the recording control means,
The disk control means for recording non-moving image data on the recording medium for recording moving image data of a second size each time the first size of the non-moving image data is recorded. The recording control means is controlled to provide an empty data recording area for recording.

In order to achieve the above object, a recording apparatus according to another embodiment of the present invention includes:
A recording device for recording data on a write-once recording medium,
Recording control means;
Disc control means for controlling the recording control means,
When recording the moving image data on the recording medium, the disk control means provides an empty data recording area for the second size every time the first size of the moving image data is recorded. The recording control means is controlled.

In order to achieve the above object, a recording apparatus according to still another embodiment of the present invention includes:
A recording device for recording data on a recording medium,
Recording control means;
Disc control means for controlling the recording control means,
The disk control means includes
When moving image data to be reproduced continuously is recorded in two non-continuous data recording areas on the recording medium, the data recording for the first continuous size between the two data recording areas A data recording area for rearranging the moving image data for a second size is provided for each area or in an empty data recording area in which neither the moving image data nor the non-moving image data is recorded. Controlling the recording control means to move the moving image data of the second size recorded in any one of the two data recording areas and record it in the data recording area for rearrangement of the moving image data; It is characterized by that.

In order to achieve the above object, a recording apparatus according to still another embodiment of the present invention includes:
A recording device for recording data on a write-once recording medium,
Recording control means;
Disc control means for controlling the recording control means,
The write-once recording medium is recorded so as to enable seamless reproduction by providing an empty data recording area for a second size for moving image data rearrangement every time the first size of moving image data is recorded. With
When a part of the moving image data recorded on the recording medium is deleted and the moving image data to be reproduced continuously is recorded in two non-continuous data recording areas on the recording medium The recording control so that moving image data of the second size recorded in one of the two data recording areas is moved and recorded in the data recording area for rearrangement of the moving image data. The means is controlled.

In order to achieve the above object, a control method for a recording apparatus according to still another embodiment of the present invention includes:
A control method of a recording apparatus for recording data on a recording medium,
Recording control process;
A disk control step for controlling the recording control step,
The disk control step is for recording moving image data for a second size each time the first size of the non-moving image data is recorded when recording the non-moving image data on the recording medium. The recording control step is controlled so as to record by providing an empty data recording area.

In order to achieve the above object, a control method for a recording apparatus according to still another embodiment of the present invention includes:
A control method for a recording apparatus for recording data on a write-once recording medium,
Recording control process;
A disk control step for controlling the recording control step,
In recording the moving image data on the recording medium, the disk control step records an empty data recording area for the second size every time the first size of the moving image data is recorded. The recording control step is controlled.

In order to achieve the above object, a control method for a recording apparatus according to still another embodiment of the present invention includes:
A control method of a recording apparatus for recording data on a recording medium,
Recording control process;
A disk control step for controlling the recording control step,
The disk control process includes:
When moving image data to be reproduced continuously is recorded in two non-continuous data recording areas on the recording medium, the data recording for the first continuous size between the two data recording areas A data recording area for rearranging the moving image data for a second size is provided for each area or in an empty data recording area in which neither the moving image data nor the non-moving image data is recorded. Controlling the recording control step so that moving image data of the second size recorded in any one of the two data recording areas is moved and recorded in the data recording area for rearrangement of the moving image data; It is characterized by that.

In order to achieve the above object, a control method for a recording apparatus according to still another embodiment of the present invention includes:
A control method for a recording apparatus for recording data on a write-once recording medium,
Recording control process;
A disk control step for controlling the recording control step,
The write-once recording medium is recorded so as to enable seamless reproduction by providing an empty data recording area for a second size for moving image data rearrangement every time the first size of moving image data is recorded. With
When a part of the moving image data recorded on the recording medium is deleted and the moving image data to be reproduced continuously is recorded in two non-continuous data recording areas on the recording medium The recording control so that moving image data of the second size recorded in one of the two data recording areas is moved and recorded in the data recording area for rearrangement of the moving image data. The process is controlled.

  According to the present invention, it is possible to record moving image data so that seamless reproduction is possible on a recording medium.

<Embodiment 1>
In the recording apparatus according to Embodiment 1 of the present invention described below, a randomly accessible and removable DVD disk is used as a recording medium that is an optical disk. Then, video data and audio data are compressed and recorded in a format compliant with the BD-ROM standard, and H.264 is used for compressing and encoding video data. A case where the present invention is applied to an image pickup apparatus including an image recording apparatus adopting the H.264 (MPEG4-AVC) standard will be described as an example.

In FIG. 1, reference numeral 101 denotes a control unit that controls the entire imaging apparatus including the recording apparatus. Reference numeral 102 denotes an optical system capable of changing the focal length and exposure state, and reference numeral 103 denotes an image pickup device such as a CCD (Charge Coupled Device), which has a function of converting light imaged by the optical system 102 into an electric signal. Have. Reference numeral 104 denotes a signal processing unit that performs predetermined signal processing such as white balance and gamma correction on an input image signal, and temporarily records it in a memory 113 described later as moving image data or still image data.

Reference numeral 105 denotes an MPEG2 encoding / decoding unit that converts moving image data temporarily recorded in the memory 113 to H.264. H.264 data, or H.264 data It has a function of decoding moving image data from H.264 data.

  Reference numeral 106 denotes a JPEG encoding / decoding unit, which encodes still image data temporarily recorded in the memory 113 according to the JPEG method. The JPEG encoding / decoding unit 105 has a function of decoding data encoded by the JPEG method, decoding still image data, and writing back to the memory 113.

  Reference numeral 107 denotes a microphone, which has a function of converting sound into an audio signal. Reference numeral 108 denotes a speaker, which has a function of converting an audio signal into audio, contrary to a microphone.

  Reference numeral 109 denotes an audio encoding / decoding unit, which has a function of encoding an audio signal input from the microphone 107 into a predetermined code format and temporarily storing it in the memory 113. Further, it has a function of decoding an audio signal from predetermined encoded data stored in the memory 113. As the predetermined code format, for example, AC3 (Audio Code number 3) is used in the first embodiment. Reference numerals 110 and 111 denote a disk control unit and a DVD disk which is a randomly accessible and removable recording medium, respectively.

  The disk control unit 110 includes a medium determination unit 120, a data determination unit 121, a seek control unit 122, a recording control unit 123, and a reproduction control unit 124, and controls the entire disk control. Further, the disk control unit 110 has a seek motor for moving the optical pickup and the pickup in the disk radial direction. The disk control unit 110 including the above executes the operation of each part including the operation of the embodiment of the present invention under the control of the control unit 101.

  Schematically, H.V. is moving image data stored in the memory 113. H.264 data and audio data AC3 data are multiplexed and recorded on the DVD disk 111, and conversely, the H.264 data recorded on the DVD disk 111 is recorded. H.264 data and AC3 data are reproduced. From the reproduced data, H. H.264 data and AC3 data are separated and stored in a predetermined area of the memory 113. Similarly, JPEG data which is still image data is also recorded on the DVD disk 111 and reproduced.

  Reference numeral 112 denotes a flash memory, which is used for storing a program operated by the control unit 101 and storing and saving various setting data. Since the data stored in the flash memory 112 is retained even when the power of the flash memory 112 is turned off, the data is also used for retaining management data and the like that need to be retained even after the power is turned off.

  Reference numeral 113 denotes a memory. H.264 data buffer, AC3 data buffer, JPEG data buffer, CPU work area memory included in the control unit 101, and the like.

  Reference numeral 114 denotes a display unit, which has a function as a display device for the decoded image data and a function as a viewfinder at the time of photographing. Furthermore, it also has a function as an operation screen when the user operates the imaging apparatus including the recording apparatus according to the first embodiment of the present invention. Reference numeral 115 denotes an internal bus, which is used for access to each block from the control unit 101 and data transfer between the blocks executed via the memory 113. Note that an instruction from the user is input from a pointing device or a keypad included in the input unit 116.

  In the imaging apparatus including the recording apparatus according to the first embodiment configured as described above, an operation mode for recording a still image (hereinafter referred to as a still image recording mode) and an operation mode for recording a moving image (hereinafter, referred to as a still image recording mode). Video recording mode and description). Then, the user selects one of the recording modes via the input unit 116. Then, the control unit 101 selects and activates the still image recording mode or the moving image recording mode from the selected mode and the state in the loaded DVD disc 111, and transfers the still image data or moving image data to the DVD disc 111. Can be recorded.

  When activated in the moving image recording mode, the moving image data is stored in the H.264 format based on the moving image aspect ratio, the compression encoding format, the resolution, the audio encoding compression encoding format, and the number of channels. The data is compressed by the H.264 system. Further, it is recorded on the DVD disc 111 in accordance with a predetermined digital moving image format, here, UDF (Universal Disc Format).

  When activated in the still image recording mode, still image data is compressed into a digital still image format by JPEG compression. Here, the data is recorded on the loaded DVD disc 111 according to the UDF specification in a format compliant with DCF (Design Rule for Camera File system).

  All image data recorded on the DVD disk 111 is divided and recorded in units of sectors (2 kbytes), which is the minimum access unit of the DVD disk 111. When recording data by adding data to the DVD disk 111, a recording area (hereinafter referred to as a data recording area) consisting of one or more physically continuous sectors is secured on the DVD disk 111; The data is recorded by being divided at the position of the data recording area. Further, when image data is additionally recorded, it is recorded from the inner periphery of the DVD disk 111 toward the outer periphery. The data recording area starts at the start on the inner circumference side and ends at the end on the outer circumference side.

  Next, referring to FIG. 2, an empty data recording area for adding and recording moving image data to the DVD disc 111 necessary for seamless reproduction is secured, and image data is added and recorded. The method of performing will be described.

  When recording of moving image data or still image data to be added to the DVD disc 111 is instructed by the user's operation from the input unit 116, it is necessary to add to the DVD disc 111 first in step S201 after the start of processing. The number of sectors A1 of the image data is determined. For this determination, for example, the image determination unit 121 determines and determines image data to be recorded.

  In step S202, it is determined whether or not recorded moving image data that has already been recorded, that is, a data recording area of a recorded moving image, exists on the DVD disc 111. Specifically, for example, the determination can be made based on management information recorded on the disc. The management information includes file system information such as UDF, and the reproduction control unit 124 reproduces the management information from the DVD disc 111, and confirms the file name and extension of recorded data on the disc based on this management information. be able to.

  If no moving image data is recorded on the DVD disc 111, the process proceeds to step S211. In this case, still image data may be recorded, but moving image data is not recorded, so that consideration of seamless reproduction is unnecessary. Accordingly, in step S211, image data to be additionally recorded is recorded following the end of the preceding recorded data recording area on the outermost peripheral side on the DVD disk 111. That is, the image data to be additionally recorded is continuously added and recorded under the control of the recording control unit 123 in the preceding data recording area starting from the sector next to the sector with the largest address among the recorded sectors. When the image data to be added is recorded for the A1 sector, the process proceeds to step S212, and the process ends. In this case, the image data to be added has the same operation regardless of whether it is moving image data or still image data.

  On the other hand, if it is determined in step S202 that there is moving image data already recorded in the data recording area on the DVD disc 111, the process proceeds to step S203, and the image data to be added next is still image data. It is determined whether or not. This determination is performed by the data determination unit 121, for example. If the image data to be added is still image data, the process proceeds to step S204.

  In step S204, the still image data recording area continues continuously for B1 sectors (for the first size) from the outermost side to the innermost side of the preceding data recording area sectors that have already been recorded. Check whether or not. That is, it is determined whether or not still image data continues for B1 sectors or more from the end of the recorded area (in this case, moving image data) of the preceding recorded data on the outermost periphery side. That is, it is checked whether the still image data of the B1 sector or more continues from the end of the moving image data confirmed in step S202, including the added still image data.

  When the still image data continues for the B1 sector, the process proceeds to step S205, and an empty data recording area of the C1 sector (for the second size) is recorded on the DVD disk 111 for recording moving image data, and the process returns to step S204. For example, the recording control unit 123 secures the empty data recording area for the C1 sector.

  For example, if the DVD disk 111 is a write-once recording medium, a method for securing an empty data recording area for the C1 sector on the DVD disk 111 may be a reserved zone defined in the DVD standard. If the DVD disk 111 is a rewritable recording medium, 0 may be recorded as fixed pattern data, and an unrecorded area recognized as unused on the file system may be used. In this case, the determination of the DVD disk 111 itself is executed by the medium determination unit 120.

  In this case, a C1 cluster having a predetermined size is set as the minimum size, and an empty data recording area having a size equal to or larger than the C1 cluster is secured. Returning to step S204, since an empty data recording area for C1 sector is secured this time, there is no continuous still image data, and the process proceeds to step S206, where image data to be additionally recorded is recorded.

  If it is determined in step S204 that the interval from the end of the recorded area of the outermost recorded image data (in this case, moving image data) from the recording area does not reach the B1 sector, the process proceeds to step S206.

  In step S206, image data to be additionally recorded (in this case, still image data) is recorded for one sector, following the end of the still image data recording area on the outermost periphery side or following the end of the reserved empty data recording area. In step S207, the number of sectors A1 to be recorded is decremented by one.

  In step S208, it is determined whether or not recording of additional image data (still image data) has been completed. If all of the data has been recorded, the process proceeds to step S209 to complete additional recording. However, if there is still image data to be recorded, the process returns to step S204, and the same processing is repeated until all the recording sector numbers A1 have been recorded. In this case, if the recording sector number A1 is larger than the B1 sector interval, an empty data recording area for the second C1 cluster is secured in step S204.

  Returning to step S203, this time, if the image data to be added is moving image data, the process proceeds to step S210, and the image data to be added (in this case, from the leading end of the preceding empty data recording area on the outermost side). (Moving image data) is recorded for one sector. In step S213, the number of sectors A1 of moving image data to be recorded is decremented by one as in step S207.

  Next, the process proceeds to step S214, and similarly to step S208, it is determined whether or not recording has been completed for all moving image data corresponding to the number of sectors A1 to be additionally recorded. If recording has been completed, the process proceeds to step S215. End recording. However, if there is still image data to be recorded, the process returns to step S210, and the same processing is repeated until all the recording sector numbers A1 of the moving image data to be additionally recorded have been recorded. In this case, regardless of whether seamless reproduction is possible or not, it is only necessary to record the moving image data to be additionally recorded in the empty data recording area near the recorded moving image data recording area.

  FIG. 3 is a diagram showing the state of the data recording area on the DVD disk 111 when recording is sequentially added according to the contents of the flowchart of FIG. At the top, the entire DVD disk 111 is in an unrecorded area.

  Regarding the number of sectors B1 with an interval corresponding to the maximum sector size between moving image data recording areas enabling seamless reproduction, and the minimum number of sectors C1 of the empty data recording area secured for additional recording of moving image data Determined according to the recording format. B2 corresponds to the first sector, and C1 corresponds to the second size.

  That is, as described above, for seamless playback, the maximum size B1 of the interval between the data recording areas of the moving image data to be additionally recorded and the minimum size C1 of the empty data recording area to be secured are recorded on the recording medium. The seek time is determined in relation to the associated seek speed. Alternatively, the size of the interval between the data recording areas of the moving image data to be additionally recorded and the size of the empty data recording area may be determined in association with the bit rate of the moving image data to be additionally recorded. The seek speed is basically determined by the seek control unit 122 for each drive of the recording medium, and the seek time is determined by the seek control unit 122 according to the arrangement relationship between the seek speed and the preceding data recording area. Is done. The same applies to the embodiments described below.

  As described above, according to the recording apparatus according to Embodiment 1 of the present invention, an empty data recording area for arranging moving image data necessary for seamless reproduction is secured and secured on a DVD disk that is a removable recording medium. It is possible to record moving image data using an empty area.

<Embodiment 2>
In the first embodiment, the method for satisfying the arrangement condition necessary for seamless reproduction of the moving image data on the DVD disk 111 when moving image data or still image data is additionally recorded has been described. In the recording apparatus according to the second embodiment of the present application, a method for performing rearrangement of moving image data and satisfying an arrangement condition necessary for seamless reproduction will be described.

  In the following description of the embodiments, the first size is the maximum distance between the two moving image data recording areas necessary for seamless reproduction, and the second size is the moving image data. This corresponds to the minimum distance of the data recording area secured for recording.

  Here, it is assumed that the moving image data is arranged on the DVD disk 111 which is a removable recording medium so that seamless playback is possible. In this state, when one part of the data recording area of the recorded moving image data on the DVD disc 111 is deleted, the remaining moving image data recording areas are efficiently rearranged so that they can be seamlessly reproduced. The method will be described with reference to FIG. The configuration of the recording apparatus according to the second embodiment is basically the same as that of the imaging apparatus that is the recording apparatus according to the first embodiment illustrated in FIG. 1, and detailed description thereof is omitted.

  Assume that after deleting a portion of moving image data on the DVD disc 111 according to a user instruction, the user issues an instruction to rearrange image data via the input unit 116 to the imaging apparatus in step S401. . In step S402, the data recording area including the moving image data having the smallest physical address on the DVD disk 111 is checked, and the resulting data recording area is defined as the data recording area A2.

  Next, in step S403, a data recording area having a physical address larger than that of the data recording area A2 on the DVD disc 111, that is, a moving image data recorded on the outer peripheral side is searched. If there is no rearrangement, there is no need for rearrangement, and the process proceeds to step S410 to end the rearrangement process.

  However, if there is a data recording area in which moving image data having a physical address larger than that of the data recording area A2 is recorded, the process proceeds to step S404. The data recording area in which the moving image data is recorded has the smallest physical address and is defined as the subsequent data recording area B2. These operations are executed by the data determination unit 121 and the reproduction control unit 124.

  In step S405, an interval that is a physical distance from the end of the preceding data recording area A2 to the position of the starting end of the subsequent data recording area B2 is calculated. If the calculation result in step S406 is not larger than the predetermined number of sectors C2 (for the first size), seamless reproduction is possible as it is. Accordingly, in step S407, the data recording area B2 is redefined as a new data recording area A2, and the process returns to step S403 to repeat the same processing.

  However, in step S405, if the physical distance from the end of the preceding data recording area A2 to the starting position of the succeeding data recording area B2 is larger than the predetermined number of sectors C2, rearrangement for seamless reproduction is necessary. It is determined that there is, and the process proceeds to step S407.

  Next, in step S407, on the DVD disc 111, the sector number D2 (for the second size) equal to or larger than a predetermined size within the interval of the sector number C2 from the end of the preceding data recording area A2. It is determined whether or not there is an empty data recording area. If not, the seamless reproduction from the preceding data recording area A2 in which the moving image data is recorded to the subsequent data recording area B2 in which the moving image data is recorded is given up. In step S406, the data recording area B2 is similarly redefined as a new data recording area A2, and the same processing is repeated from step S403.

  However, if there is an empty data recording area for rearrangement in step S407, an empty data recording area for the number of sectors D2 is secured, and the process proceeds to step S408. In step S408, moving image data for a predetermined number of sectors D2 is moved from the starting end of the subsequent data recording area B2 where moving image data is recorded to the reserved empty data recording area and recorded. Then, the sector number D2 from the head of the data recording area B2 is set as an empty data recording area. This sector number D2 corresponds to the second size.

  Next, in step S409, the same processing is repeated from step S403, with the data recording area in which the moving image data is moved and recorded by the movement described above as a new data recording area A2.

  FIG. 5 is a diagram showing a transition state of the data recording area of the DVD disk 111 when rearrangement is performed based on the content of the flowchart of FIG. The top shows the initial state of the DVD disc 111. After the moving image data Y is deleted from the moving image data X, Y and Z, the moving image data is sequentially rearranged in the area for rearrangement. Indicates the transition to be performed.

  When executing the rearrangement, it is preferable that the amount of data to be moved is small and the distance to be moved is small in consideration of the processing speed. Therefore, in FIG. 5, the rearranged moving image data is recorded in a rearranged manner by being rearranged in the rearrangement area based on the above idea.

  A sector number C2 which is an interval corresponding to the maximum physical distance allowed for seamless reproduction, and a sector number D2 corresponding to the data recording area size of the minimum moving image data of the secured moving image data, Determine according to seek speed. These are determined by the seek control unit 122.

  In the recording apparatus according to the second embodiment of the present invention, it is possible to make a state in which seamless playback is possible by rearranging a part of the data recording area on the removable DVD disk 111 that is randomly accessible. It becomes possible.

<Embodiment 3>
As in the second embodiment, a state is assumed in which a data recording area of moving image data is arranged on a physically accessible disc that can be accessed on a removable and removable DVD disk 111. In this case, when a portion of the recorded moving image data on the DVD disc 111 is deleted, a portion of the data is efficiently rearranged so that the remaining moving image data has a physical arrangement that can be seamlessly reproduced. The second method will be described. Note that the configuration of the recording apparatus is the same as that of the first embodiment, and a description thereof will be omitted.

  Hereinafter, after a part of the recorded moving image data is deleted, the remaining moving image data recorded in the data recording area on the DVD disc 111 is efficiently rearranged so that the physical arrangement can be seamlessly reproduced. The method 2 will be described with reference to FIG.

  After the moving image data Y is deleted by the user instruction, it is assumed that an instruction for rearrangement of the data recording area of the image data is issued in step S601 by a user input of the input unit 116. Then, in step S602, the data recording area in which the moving image data having the largest physical address (outer peripheral side) on the DVD disc 111 is defined as a data recording area A3.

  In step S603, a data recording area in which moving image data having a physical address smaller than that of the data recording area A3 is searched. If not, there is no need for rearrangement, and the process advances to step S610 to end the rearrangement process. If there is a data recording area in which moving image data having a physical address smaller than the data recording area A3 (inner circumference side) is recorded, the process proceeds to step S604, and the data recording area on the outermost circumference side other than the data recording area A3 is assumed. It is defined as the preceding data recording area B3.

  In step S605, an interval that is a physical distance from the position of the start end of the subsequent data recording area A3 on the DVD disc 111 to the end of the data recording area B3 is calculated. If the calculation result in step S606 is not greater than the predetermined number of sectors C3 (for the first size), seamless reproduction is possible. Therefore, in step S607, the data recording area B3 is redefined as a new data recording area A3, and the same processing is repeated from S603. If it is larger than the predetermined number of sectors C3 in S606, it is determined that rearrangement is necessary, and the process proceeds to step S607.

  Next, in step S607, continuous empty data recording areas having a predetermined number of sectors D3 or more within the number of sectors C from the start position of the data recording area A3 on the DVD disk 111 toward the inner periphery. It is determined whether or not there is. If not, the seamless reproduction from the preceding data recording area B3 where the moving image data is recorded to the subsequent data recording area A3 where the moving image data is recorded is given up. Then, the data recording area B3 is redefined as a new data recording area A3, and the same processing is repeated from step S603. Note that D3 corresponds to the second size.

  If there is an empty data recording area for rearrangement on the DVD disk 111 in step S607, an empty data recording area of sector size D3 is secured, and the process proceeds to step S608. In step S608, the moving data is recorded by moving from the end of the preceding data recording area B3 where the moving image data is recorded to the empty data recording area in which moving image data of a predetermined sector size D3 is secured. The D3 sector from the end of B3 is defined as an empty data recording area. In this case, an empty data recording area having a predetermined size D3 as a unit and a size larger than D3 may be used.

  Next, in step S609, the same processing is repeated from step S603, with the data recording area from which one copy of the image data has been deleted as a result of the movement described above as a new data recording area A3. The above operation is also executed by the data determination unit 121, the recording control unit 123, and the reproduction control unit 124 included in the disc control unit 110 under the control of the control unit 101.

  FIG. 7 is a diagram showing the state of the data recording area of the DVD disk 111 when rearrangement is performed based on the content of the flowchart of FIG. The top shows the initial state of the DVD disc 111, and shows a transition in which the moving image data is sequentially rearranged after the moving image data Y is deleted.

  C3 (for the second size) corresponding to the maximum empty data recording area allowed for seamless reproduction and the number of sectors D3 corresponding to the data recording area size in which the minimum moving image data of moving image data to be secured is recorded The (first size) is the same as in the second embodiment.

  As described above, according to the third embodiment of the present invention, by rearranging a part of the data recording area in which the moving image data is recorded on the DVD disk 111 that is randomly accessible and removable, It becomes possible to make the seamless playback possible.

<Embodiment 4>
The case where a write-once, so-called write-once recording medium is used in the recording apparatus according to Embodiment 4 of the present invention will be described.

  Currently, there are rewritable discs that can be rewritten repeatedly, such as DVD-RW, and write-once discs as write-once recording media, such as DVD-R.

  In this embodiment, the empty data recording for arranging the data recording area in which the moving image data necessary for seamless reproduction in consideration of the deletion of the image data is recorded on the write-once disk that is a write-once recording medium. A method for securing the area will be described. Further, when a part of recorded moving image data is deleted, a method for efficiently rearranging the data recording area using the empty data recording area so that the remaining moving image data can be physically arranged so as to be seamlessly reproduced. explain. Since the configuration of the image recording apparatus is the same as that of the first embodiment, the description thereof is omitted.

  Hereinafter, a method for securing an empty data recording area for arranging a data recording area in which moving image data necessary for seamless reproduction in consideration of deletion of image data will be described with reference to FIG.

  When additional recording of image data to the DVD disc 111 such as shooting of moving images and still images occurs due to the user's operation of the input unit 116, first, in step S801 after the start of the processing, the addition to the DVD disc 111 is performed. The number of sectors A4 that needs to be recorded is determined. Next, the process proceeds to step S802, where it is determined whether or not there is a data recording area in which moving image data already recorded exists on the DVD disk 111. The determination method is the same as the determination in the first embodiment.

  If the moving image data is not recorded, the process proceeds to step S810. Then, moving image data to be recorded is continuously added from the data recording area of the sector next to the recorded sector having the largest physical address, which is the end of the data recording area of the recorded non-image data. Record. That is, moving image data is additionally recorded for A4 sectors following the end of the outermost recorded data recording area. Thereafter, the process proceeds to step S811, and the additional recording process is terminated.

  In step S803, it is determined whether the recorded data recording area having the largest physical address continues for a predetermined number of sectors B4 or more. If the moving image data has a predetermined number of sectors B4, the process proceeds to step S804. An empty data recording area having a continuous sector number C4 is secured from the end of the preceding data recording area. When an empty data recording area is secured in step S804, the process returns to step S803. This time, since an empty data recording area is secured, the process proceeds to step S805. The first size corresponds to the B4 sector, and the second size corresponds to the C4 sector.

  If it is determined in step S803 that the data recording area in which moving image data is recorded has not reached the number of sectors B4 having a predetermined size, the process proceeds to step S805. Then, one sector of image data to be additionally recorded is recorded following the end of the data recording area of the recorded sector having the largest physical address or following the end of the secured empty data recording area.

  In step S806, the number of sectors A4 to be recorded is decremented by 1. Next, the process proceeds to step S807, where it is determined whether or not the recording of moving image data for the A4 sector that needs additional recording has been completed. If it has been recorded, the process proceeds to step S808, and the additional recording process ends. If there is unrecorded moving image data, the process returns to step S803 and the same processing is repeated.

  FIG. 9 is a diagram showing the state of the data recording area of the DVD disc 111 related to the determination in step S804 based on the content of the flowchart of FIG. The top shows the state of the empty data recording area on the DVD disc 111, and the transition of the data recording area where moving image data and still image data are additionally recorded is shown below.

  The number of sectors B4 corresponding to the maximum continuous sector size interval and the number of sectors C4 of the size of the empty data recording area reserved for moving image data additional recording may be determined according to the corresponding format. For example, in the video camera which is the recording apparatus of the present embodiment, the sector number C4 is set to twice the size of the data recording area in which the minimum moving image data of moving image data according to the bit rate of moving image data is recorded. To do. Further, a sector number B4 is obtained by subtracting the sector number C4 from the distance between data recording areas in which moving image data capable of seamless reproduction is recorded.

  When an empty data recording area is secured according to these values, moving image data is additionally recorded in order from the empty data recording area having the smallest physical address in the empty data recording area. As a result, all moving image data can be additionally recorded while an empty data recording area is secured in a data recording area arranged so as to be seamlessly reproducible.

  Next, a method of rearranging moving image data recorded in the remaining data recording area so that seamless reproduction is possible when a portion of the recorded moving image data described above is deleted will be described. The method for rearranging moving image data recorded in the remaining data recording area so that seamless reproduction is possible when one portion of the recorded moving image data is deleted is the same as in the second and third embodiments. Therefore, explanation is omitted.

  Even when a write-once recording medium is used, seamless playback is possible by rearranging data recording areas using empty data recording areas secured in accordance with the values described in the second and third embodiments. Will be rearranged.

  FIG. 10 is a diagram showing states 1 to 4 of the data recording area of the DVD disc 111 when rearrangement is performed based on the content of the flowchart in the second embodiment.

  As described above, according to the fourth embodiment of the present invention, by rearranging the data recording areas of the DVD disc 111, the data recording areas can be rearranged in a state where seamless playback is possible. .

  In the above description of the embodiment, the still image data does not have to be image data, but may be non-moving image data. As the non-moving image data, various data such as text data and control data can be considered in addition to the still image data.

  The present invention can also be implemented by supplying a storage medium storing software program codes for realizing the functions of the above-described embodiments to a system or apparatus.

  That is, the object of the present invention can also be achieved by reading and executing a program code stored in a storage medium by a computer (or CPU or MPU) of the system or apparatus. In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention. As a storage medium for supplying the program code, for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS or the like running on the computer performs actual processing based on an instruction of the program code. One part or all may be performed. Thus, the present invention includes a case where the functions of the above-described embodiments are realized by the processing.

  Furthermore, in the present invention, the program code read from the storage medium can be written in a memory provided in a function expansion board inserted in the computer or a function expansion unit connected to the computer. Therefore, when the function expansion board or the CPU provided in the function expansion unit performs part or all of the actual processing based on the written program code instruction, the function of the above-described embodiment is realized by the processing. Is also included.

It is a figure explaining the basic composition of an imaging device provided with the recording device concerning each embodiment of the present invention. 6 is a flowchart for explaining an additional recording operation of the recording apparatus according to the first embodiment of the invention. It is an example showing the state of the data recording area of the recording medium for each additional recording of the recording apparatus according to the first embodiment of the present invention. 10 is a flowchart for explaining the rearrangement operation of the recording apparatus according to the second embodiment of the invention. It is the example which showed the state of the data recording area of the recording medium at the time of the rearrangement of the recording device concerning Embodiment 2 of this invention. 12 is a flowchart for explaining an operation of rearrangement of the recording apparatus according to the third embodiment of the invention. It is the example which showed the state of the data recording area of the recording medium at the time of rearrangement of the recording device concerning Embodiment 3 of this invention. It is a flowchart explaining the operation | movement of the additional recording of the recording device which concerns on Embodiment 4 of this invention. It is the example which showed the state of the data recording area of the recording medium for every additional recording at the time of using a write-once type recording medium of the recording device which concerns on Embodiment 4 of this invention. It is the example which showed the state of the data recording area of the recording medium at the time of rearrangement in the case of using a write-once recording medium of the recording apparatus which concerns on Embodiment 4 of this invention. It is a figure explaining the relationship between arrangement | positioning of the data recording area | region of the moving image data on a recording medium, and the accumulation amount of a buffer in case seamless reproduction is possible. It is a figure explaining the relationship between arrangement | positioning of the data recording area | region of the moving image data on a recording medium, and the accumulation amount of a buffer when seamless reproduction is impossible.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Control part 102 Optical system 103 Image pick-up element 104 Signal processing part 105 MPEG2 encoding / decoding part 106 JPEG encoding / decoding part 107 Microphone 108 Speaker 109 Audio | voice encoding / decoding part 110 Disk control part 111 DVD disk 112 Flash Memory 113 Memory 114 Display unit 115 Internal bus 116 Input unit 120 Medium determination unit 121 Data determination unit 123 Recording control unit 124 Playback control unit

Claims (16)

A recording device for recording data on a recording medium,
Recording control means;
Disc control means for controlling the recording control means,
The disk control means for recording non-moving image data on the recording medium for recording moving image data of a second size each time the first size of the non-moving image data is recorded. A recording apparatus, wherein the recording control means is controlled to provide an empty data recording area for recording. Further comprising data discriminating means for discriminating whether moving image data is recorded on the recording medium;
The disc control means, when the data discriminating means discriminates that the moving image data is not recorded on the recording medium, does not provide an empty data recording area for the second size. When moving image data is recorded and it is determined that the moving image data is recorded on the recording medium, the second size is recorded each time the first size of the non-moving image data is recorded. 2. The recording apparatus according to claim 1, wherein the recording control unit is controlled to provide an empty data recording area for recording moving image data of a size. A recording device for recording data on a write-once recording medium,
Recording control means;
Disc control means for controlling the recording control means,
When recording the moving image data on the recording medium, the disk control means provides an empty data recording area for the second size every time the first size of the moving image data is recorded. A recording apparatus for controlling the recording control means. A recording device for recording data on a recording medium,
Recording control means;
Disc control means for controlling the recording control means,
The disk control means includes
When moving image data to be reproduced continuously is recorded in two non-continuous data recording areas on the recording medium, the data recording for the first continuous size between the two data recording areas A data recording area for rearranging the moving image data for a second size is provided for each area or in an empty data recording area in which neither the moving image data nor the non-moving image data is recorded. Controlling the recording control means to move the moving image data of the second size recorded in any one of the two data recording areas and record it in the data recording area for rearrangement of the moving image data; A recording apparatus. The disk control means includes
For each data recording area or empty data recording area of the non-moving image data for the first size continuous in the direction in which the address increases from the end of the data recording area with the smaller address of the two data recording areas Provided with a data recording area for rearranging the moving image data, and moving the moving image data in the data recording area having the larger address of the two data recording areas to relocate the moving image data 5. The recording apparatus according to claim 4, wherein the recording control means is controlled to record in the data recording area. The disk control means includes
The moving image for each data recording area or empty data recording area of the non-moving image data corresponding to the first size that continues in the direction in which the address decreases from the beginning of the larger recording area of the two recording areas. A data recording area for data rearrangement is provided, and moving image data in an area having a smaller address of the two recording areas is moved and recorded with respect to the data recording area for rearrangement of the moving image data. The recording apparatus according to claim 4, wherein the recording control unit is controlled to do so.   The recording apparatus according to claim 1, wherein the first size and the second size are determined in association with a rate of the moving image data.   The recording medium is an optical disc, and the first size and the second size are determined based on a seek time of a pickup in a playback device that plays back moving image data recorded on the optical disc. The recording apparatus according to any one of claims 1 to 6. A medium discrimination means;
When the recording control unit determines that the recording medium is a rewritable recording medium, the recording control unit records the empty pattern by recording fixed pattern data when the empty data recording area is provided. The recording apparatus according to claim 1, wherein a data recording area is secured. A recording device for recording data on a write-once recording medium,
Recording control means;
Disc control means for controlling the recording control means,
The write-once recording medium is recorded so as to enable seamless reproduction by providing an empty data recording area for a second size for moving image data rearrangement every time the first size of moving image data is recorded. With
When a part of the moving image data recorded on the recording medium is deleted and the moving image data to be reproduced continuously is recorded in two non-continuous data recording areas on the recording medium The recording control so that moving image data of the second size recorded in one of the two data recording areas is moved and recorded in the data recording area for rearrangement of the moving image data. A recording apparatus characterized by controlling the means. A control method of a recording apparatus for recording data on a recording medium,
Recording control process;
A disk control step for controlling the recording control step,
The disk control step is for recording moving image data for a second size each time the first size of the non-moving image data is recorded when recording the non-moving image data on the recording medium. A control method for a recording apparatus, wherein the recording control step is controlled so as to record by providing an empty data recording area. A control method for a recording apparatus for recording data on a write-once recording medium,
Recording control process;
A disk control step for controlling the recording control step,
In recording the moving image data on the recording medium, the disk control step records an empty data recording area for the second size every time the first size of the moving image data is recorded. A control method for a recording apparatus, wherein the recording control step is controlled. A control method of a recording apparatus for recording data on a recording medium,
Recording control process;
A disk control step for controlling the recording control step,
The disk control process includes:
When moving image data to be reproduced continuously is recorded in two non-continuous data recording areas on the recording medium, the data recording for the first continuous size between the two data recording areas A data recording area for rearranging the moving image data for a second size is provided for each area or in an empty data recording area in which neither the moving image data nor the non-moving image data is recorded. Controlling the recording control step so that moving image data of the second size recorded in any one of the two data recording areas is moved and recorded in the data recording area for rearrangement of the moving image data; A control method for a recording apparatus. A control method for a recording apparatus for recording data on a write-once recording medium,
Recording control process;
A disk control step for controlling the recording control step,
The write-once recording medium is recorded so as to enable seamless reproduction by providing an empty data recording area for a second size for moving image data rearrangement every time the first size of moving image data is recorded. With
When a part of the moving image data recorded on the recording medium is deleted and the moving image data to be reproduced continuously is recorded in two non-continuous data recording areas on the recording medium The recording control so that moving image data of the second size recorded in one of the two data recording areas is moved and recorded in the data recording area for rearrangement of the moving image data. A method for controlling a recording apparatus, characterized by controlling a process.   The program for making a computer perform each process of the control method of the recording device of any one of Claims 11 thru | or 14.   15. A computer-readable storage medium storing a program for causing a computer to execute each step of the recording apparatus control method according to claim 11.

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