JP2007281772A - Recording unit, method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To record a file with a smaller built-in memory capacity, enabling playback even on the occurrence of an accident, such as power interruption and medium ejection, during video recording. <P>SOLUTION: A write controller 34 controls to write image data on a recording medium in order of compression, as a first file, and also controls to write management information of the image data on the recording medium in order of compression of the image data, as a second file. A readout controller 36 controls to read out the first file and the second file from the recording medium. A generator 37 generates a third file having the compressed image data and the management information stored therein, from the first file and the second file being read out. The present invention is applicable to, for example, a recording device capable of recording image data, such as a digital video camera and a mobile phone. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a recording apparatus and method, and a program, and in particular, writes image data and management information thereof as files to a recording medium, and stores image data and management information from each file read from the recording medium. The present invention relates to a recording apparatus and method, and a program, which are capable of creating other recorded files.

  An ISO base data format file consists of two objects: a compressed video / audio signal part called mdat and an information part called moov called image size, compressed data size, image aspect, and playback time. Is done. In encoding processing performed in real time, moov is usually recorded in a volatile built-in memory at any time due to its data structure, and is collectively recorded at the end of the file at the end of recording.

  Some of these files are downloaded and played back, and the total time length of the data to be played back is specified and displayed based on the total time length included in the moov (see, for example, Patent Document 1). .

  In this way, for example, when a user downloads content in a fee structure that is charged according to the usage time, the user may be worried that the usage fee is unknown, or when the remaining battery capacity is low, Anxiety that may be cut off can be resolved.

JP 2004-7610 A

  However, in an apparatus that records on a non-volatile recording medium while encoding in real time, the upper limit of the recording time is determined by the capacity of the built-in memory, so the capacity of the memory is increased to realize long-time recording. The increase in the capacity of the built-in memory leads to an increase in cost. Also, even if a file is recorded over a long period of time, if an accident such as a power failure or media being removed in the last few seconds occurs, the moov of that file will not be recorded normally and the file cannot be played back It becomes a thing.

  The present invention has been made in view of such a situation, and can record a file with a smaller capacity of the built-in memory, and even when an accident such as a power failure or a media being removed during recording occurs. It is possible to record a reproducible file.

  A recording apparatus according to one aspect of the present invention is a recording apparatus that records compressed image data on a non-volatile recording medium, and the compressed order of the image data on the recording medium is a first file. And writing control means for controlling writing of the management information of the image data to the recording medium in the order of compression of the image data as a second file, and the writing from the recording medium Read control means for controlling reading of the first file and the second file, the compressed image data and the management information from the read first file and the second file, Generating means for generating a third file in which is stored.

  The write control means can add the image data to one first file in the order of compression and add the management information to one second file.

  The writing control means controls writing of the generated third file to the recording medium and deletes the first file and the second file recorded on the recording medium. Can do.

  The recording apparatus further includes a power supply that supplies power and a state determination unit that determines whether or not a state of the connected recording medium is normal, and the writing control unit supplies the power When it is determined that the power source and the connected recording medium are normal, it is determined whether all of the image data and all of the management information have been written, and the generation means causes the image to be generated. When it is determined that all of the data and all of the management information have been written, the third file in which all of the image data and all of the management information are stored from the first file and the second file. File can be generated.

  The reading control means searches the first file and the second file from the recording medium, and as a result of the search, the first file and the second file exist on the recording medium. In this case, the reading of the first file and the second file can be controlled.

  A recording method according to an aspect of the present invention is a recording method for recording compressed image data on a non-volatile recording medium, and the compressed order of the image data on the recording medium is a first file. And writing the management information of the image data to the recording medium in the order of compression of the image data as a second file, and controlling the writing of the first file from the recording medium. A third file in which the compressed image data and the management information are stored from the read first file and the second file. The step of generating is included.

  A program according to one aspect of the present invention is a program for causing a computer to perform processing for recording compressed image data on a non-volatile recording medium, and the image data to the recording medium as a first file. Control the writing of the management information of the image data to the recording medium in the order of the compression of the image data as the second file, and control writing from the recording medium The reading of the first file and the second file is controlled, and the compressed image data and the management information are stored from the read first file and the second file. Generating a third file.

  In one aspect of the present invention, the writing of the image data in the compressed order to the recording medium as the first file is controlled, and the order of the compression of the image data as the second file is controlled. The writing of the management information of the image data to the recording medium is controlled, the reading of the first file and the second file from the recording medium is controlled, and the first read A third file storing the compressed image data and the management information is generated from the file and the second file.

  As described above, according to one aspect of the present invention, compressed image data can be recorded on a nonvolatile recording medium. In addition, according to one aspect of the present invention, a file can be recorded with a smaller internal memory capacity, and a file that can be played even in the event of an accident such as a power failure or media being removed during recording. Can be recorded.

  Embodiments of the present invention will be described below. Correspondences between the constituent elements of the present invention and the embodiments described in the specification or the drawings are exemplified as follows. This description is intended to confirm that the embodiments supporting the present invention are described in the specification or the drawings. Therefore, even if there is an embodiment which is described in the specification or the drawings but is not described here as an embodiment corresponding to the constituent elements of the present invention, that is not the case. It does not mean that the form does not correspond to the constituent requirements. Conversely, even if an embodiment is described here as corresponding to a configuration requirement, that means that the embodiment does not correspond to a configuration requirement other than the configuration requirement. It's not something to do.

  A recording apparatus according to an aspect of the present invention is a recording apparatus that records compressed image data on a non-volatile recording medium, and the recording medium as a first file (for example, the mdat file 71 in FIG. 2) Control of writing the image data in the compressed order, and the management information of the image data in the order of compression of the image data as a second file (for example, the moov file 72 in FIG. 2) Write control means (for example, the write control unit 34 in FIG. 1) for controlling writing to the recording medium, and read control means for controlling reading of the first file and the second file from the recording medium (For example, the read control unit 36 in FIG. 1), and the compressed image data and the management information are stored from the read first file and the second file. Third generating means for generating a file (e.g., generator 37 of FIG. 1) and a.

  The write control means can add the image data to one first file in the order of compression and also add the management information to one second file (for example, step S13 in FIG. 4). And step S14).

  The writing control means controls writing of the generated third file to the recording medium and deletes the first file and the second file recorded on the recording medium. (For example, step S19 and step S20 in FIG. 4).

  The recording apparatus further includes a power supply that supplies power and a state determination unit that determines whether the state of the connected recording medium is normal (for example, the state determination unit 35 in FIG. 1), The writing control means determines whether all of the image data and all of the management information have been written when it is determined that the power supply for supplying power and the connected recording medium are in a normal state. (For example, in step S16 in FIG. 4), when it is determined that all of the image data and all of the management information have been written, the generation unit, from the first file and the second file, The third file storing all of the image data and all of the management information can be generated (for example, step S18 in FIG. 4).

  The read control unit searches the recording medium for the first file and the second file (for example, step S31 in FIG. 5), and as a result of the search, the first file and the second file are stored in the recording medium. When the second file exists, the reading of the first file and the second file can be controlled (for example, step S33 in FIG. 5).

  A recording method according to one aspect of the present invention is a recording method for recording compressed image data on a non-volatile recording medium, and the recording medium as a first file (for example, the mdat file 71 in FIG. 2). Control of writing the image data in the compressed order, and the management information of the image data in the order of compression of the image data as a second file (for example, the moov file 72 in FIG. 2) The writing to the recording medium is controlled (for example, step S13 and step S14 in FIG. 4), and the reading of the first file and the second file from the recording medium is controlled (for example, FIG. 4). Step S17), generating a third file storing the compressed image data and the management information from the read first file and second file. For example, including a step S18) Step of FIG.

  A program according to one aspect of the present invention is a program that causes a computer to perform processing for recording compressed image data on a non-volatile recording medium, and as a first file (for example, the mdat file 71 in FIG. 2). And controlling the writing of the image data to the recording medium in the compressed order, and the images in the order of compression of the image data as a second file (for example, the moov file 72 in FIG. 2). Control writing of data management information to the recording medium, control reading of the first file and the second file from the recording medium, and read the first file and the first file Generating a third file storing the compressed image data and the management information from the second file.

  FIG. 1 is a block diagram showing an example of the configuration of a recording apparatus according to an embodiment of the present invention.

  The recording apparatus 1 in FIG. 1 includes an input unit 11, a control unit 12, a reproduction unit 13, and a power supply unit 14. The recording device 1 is connected to a nonvolatile memory 15 and a drive 16. Further, a removable medium 17 is attached to the drive 16.

  The input unit 11 inputs an image signal supplied from an external device (not shown) and supplies the input image signal to the control unit 12. For example, the input unit 11 sequentially inputs image signals that are temporally continuous, and supplies the image signals to the control unit 12 in the input order. More specifically, the image signal is a moving image signal including an audio signal, and is temporally continuous in the order of frames.

  Note that the image signal may be another type of temporally continuous signal, for example, an audio signal or a signal for displaying a plurality of still images in order in time.

  Further, the input unit 11 supplies an input signal corresponding to a user operation to the control unit 12.

  The control unit 12 includes, for example, a microprocessor and controls the entire recording apparatus 1 according to a program stored in a volatile memory 31 described later. The control unit 12 generates image data by encoding the image signal supplied from the input unit 11. The control unit 12 records the generated image data in the nonvolatile memory 15.

  The reproduction unit 13 reproduces the image data supplied from the control unit 12. For example, the reproducing unit 13 reproduces the image data by decoding the encoded image data.

  The power supply unit 14 acquires power from a battery (not shown) or an external power source connected to the recording apparatus 1 and supplies power to each unit of the recording apparatus 1.

  The non-volatile memory 15 is configured by, for example, a Memory Stick (trademark), an HDD (Hard Disk Drive), or the like, and is attached to the recording device 1 as necessary. The nonvolatile memory 15 only needs to be a writable nonvolatile recording medium, and may be constituted by a drive to which an optical disk or a magnetic disk is mounted. The nonvolatile memory 15 records various data including image data supplied from the control unit 12 or programs executed by the control unit 12.

  As shown in FIG. 2, the nonvolatile memory 15 records an mdat file 71 and a moov file 72 written by the control unit 12.

  The drive 16 includes a magnetic disk (including a flexible disk), an optical disk (including a CD-ROM (Compact Disc-Read Only Memory), a DVD (Digital Versatile Disc), a magneto-optical disk), or a semiconductor memory. A removable medium 17 is loaded as necessary. The drive 16 exchanges data with the control unit 12 and records the data received from the control unit 12 on the removable medium 17 or supplies data or a program read from the removable medium 17 to the control unit 12. Yes. For example, the removable medium 17 records a program executed by the control unit 12 that is a microprocessor, and the drive 16 supplies the program read from the removable medium 17 to the control unit 12.

  The removable medium 17 may be the same type of recording medium as the nonvolatile memory 15.

  The control unit 12 includes a volatile memory 31, a compression unit 32, a management information acquisition unit 33, a write control unit 34, a state determination unit 35, a read control unit 36, and a generation unit 37. For example, the compression unit 32, the management information acquisition unit 32, the write control unit 34, the state determination unit 35, the read control unit 36, and the generation unit 37 are realized by the control unit 12 executing a program.

  The volatile memory 31 is a volatile storage medium such as DRAM (Dynamic Random Access Memory) or SRAM (Static Random Access Memory), and temporarily stores image data corresponding to the image signal supplied from the input unit 11. To do. For example, when an image signal that is an analog signal is input to the input unit 11, the control unit 12 quantizes the image signal, and thus the volatile memory 31 stores image data obtained by quantizing the image signal. To do. For example, when an image signal that is a digital signal is input to the input unit 11, the volatile memory 31 stores image data corresponding to the digital signal.

  Since the image signals are temporally continuous and sequentially input, the volatile memory 31 stores the image data in order according to the input order. The volatile memory 31 temporarily stores data necessary for the operation of the control unit 12.

  The compression unit 32 sequentially compresses and encodes the image data temporarily stored in the volatile memory 31 using a predetermined method. Specifically, for example, the compression unit 32 stores the image data stored in the volatile memory 31 in the order of input of the image signals in accordance with the image signals sequentially supplied from the input unit 11. According to the MP4 file format. The compression unit 32 sequentially supplies the actual data of the image data obtained by compression encoding to the write control unit 34 as mdat data. The actual data is data obtained by encoding the content stored in the mdat box in a file conforming to the MP4 file format. An image signal is obtained by encoding the actual data.

  The management information acquisition unit 33 sequentially acquires, from the compression unit 32, management information indicating the encoding method, the actual data size, the range, and the like of the image data compressed and encoded by the compression unit 32. The management information acquisition unit 33 sequentially supplies the acquired management information to the write control unit 34 as moov data.

  The compression unit 32 sequentially supplies the actual data of the compressed and encoded image data to the write control unit 34 as mdat data, and sequentially manages the management information obtained by the compression encoding of the image data. , And may be supplied to the write control unit 34 as moov data.

  The write control unit 34 controls writing of the mdat data supplied from the compression unit 32 in the compressed order as the mdat file 71 to the nonvolatile memory 15.

  That is, when the supplied mdat data is actual data of the image data first compressed in the compression unit 32 for the image data to be recorded, the write control unit 34 stores the mdat file 71 for storing mdat data. Is generated. Then, the write control unit 34 supplies the generated mdat file 71 to the nonvolatile memory 15 and causes the nonvolatile memory 15 to record the mdat file 71.

  Further, the write control unit 34 causes the non-volatile memory 15 to write the mdat data supplied from the compression unit 32 to the mdat file 71 in the compressed order for the image data to be recorded.

  Furthermore, the write control unit 34 controls the writing of the moov data supplied from the management information acquisition unit 33 as the moov file 72 to the nonvolatile memory 15.

  That is, when the supplied moov data is the management information of the data first compressed in the compression unit 32 for the image data to be recorded, the writing control unit 34 stores the moov file 72 for storing the moov data. Generate. Then, the write control unit 34 supplies the generated moov file 72 to the nonvolatile memory 15 and causes the nonvolatile memory 15 to record the moov file 72.

  The writing control unit 34 stores the moov data supplied from the management information acquisition unit 33 in the non-volatile memory 15 so that the image data to be recorded is stored in the moov file 72 in the order in which the image data is compressed. Let it be written.

  Further, the write control unit 34 writes the MP4 format file supplied from the generation unit 37, that is, a file conforming to the MP4 file format, into the nonvolatile memory 15.

  The write control unit 34 includes a conversion unit 51 and a deletion unit 52.

  The conversion unit 51 converts the mdat data supplied from the compression unit 32 so that it can be added to the mdat file 71 of the nonvolatile memory 15. Also, the conversion unit 51 converts the moov data supplied from the management information acquisition unit 33 so that it can be added to the moov file 72 in the nonvolatile memory 15.

  The deletion unit 52 deletes the mdat file 71 and the moov file 72 recorded in the non-volatile memory 15 as the write control unit 34 writes the MP4 format file supplied from the generation unit 37 to the non-volatile memory 15. To do.

  Further, the writing control unit 34 determines whether all of the image data and all of the management information have been written to the nonvolatile memory 15. When it is determined that all of the image data and all of the management information have been written, the write control unit 34 supplies information indicating that all of the image data and all of the management information have been written to the read control unit 36. .

  The state determination unit 35 determines whether the power supply that supplies power and the state of the connected recording medium are normal. That is, the state determination unit 35 determines whether the power supply state from the power supply unit 14 to each unit of the recording apparatus 1 and the connection state of the nonvolatile memory 15 are normal.

  When it is determined that the state of the power supply and the recording medium is normal, the state determination unit 35 supplies information indicating that the state of the power supply and the recording medium is normal to the read control unit 36.

  The read control unit 36 is non-volatile according to information indicating that all of the image data and all of the management information have been written from the write control unit 34 and information indicating that the power supply and the recording medium are in a normal state. The reading of the mdat file 71 and the moov file 72 from the memory 15 is controlled. The read control unit 36 supplies the read mdat file 71 and moov file 72 to the generation unit 37.

  The read control unit 36 includes a search unit 53. The search unit 53 searches the mdat file 71 and the moov file 72 from the files recorded in the nonvolatile memory 15.

  In addition, when the mdat file 71 and the moov file 72 exist in the nonvolatile memory 15 as a result of the search by the search unit 53, the read control unit 36 controls reading of the mdat file 71 and the moov file 72.

  The generation unit 37 generates an MP4 format file in which mdat data as compressed image data and moov data as management information are stored from the mdat file 71 and the moov file 72 supplied from the read control unit 36. To do. The generation unit 37 supplies the generated MP4 format file to the write control unit 34.

  FIG. 3 is a diagram illustrating an example of the configuration of an MP4 format file generated by the generation unit 37.

  The generated MP4 format file shown in FIG. 3 is composed of a header, mdat, and moov. The header is, for example, data representing a file type description, and there is only one header in the file. As described above, mdat is actual data of compressed image data. As described above, moov is data representing management information of compressed image data.

  Next, file recording processing in the recording apparatus 1 will be described.

  For example, the control unit 12 of the recording apparatus 1 starts the processing when a signal indicating the user's operation for starting the file recording process and the image data supplied from the input unit 11 are input.

  FIG. 4 is a flowchart illustrating an example of file recording processing in the recording apparatus 1.

  In step S11, the compression unit 32 compresses the input image data. Specifically, the compression unit 32 sequentially compresses and encodes the image data supplied from the input unit 11 by a predetermined method. The compression unit 32 sequentially supplies the actual data of the compressed and encoded image data to the write control unit 34 as mdat data.

  In step S <b> 12, the management information acquisition unit 33 sequentially acquires management information among the image data compression-encoded by the compression unit 32. The management information acquisition unit 33 sequentially supplies the acquired management information to the write control unit 34 as moov data.

  In step S <b> 13, the write control unit 34 writes the compressed image data to the mdat file 71. That is, in the first step S13, when the mdat data that is the actual data of the image data first compressed by the compression unit 32 is supplied to the image data to be recorded, the write control unit 34 receives the mdat data. Mdat file 71 is stored. The write control unit 34 supplies the generated mdat file 71 to the nonvolatile memory 15 and writes the mdat file 71 in the nonvolatile memory 15.

  In step S <b> 14, the write control unit 34 writes the acquired management information in the moov file 72. That is, in the first step S14, the write control unit 34 is supplied with moov data, which is management information of data first compressed by the compression unit 32, from the management information acquisition unit 33 for the image data to be recorded. Then, a moov file 72 for storing the moov data is generated. The write control unit 34 supplies the generated moov file 72 to the nonvolatile memory 15 and writes the moov file 72 in the nonvolatile memory 15.

  In step S15, the state determination unit 35 determines whether or not the state of the power source that supplies power and the connected recording medium are normal. That is, the state determination unit 35 determines whether the power supply state from the power supply unit 14 to each unit of the recording apparatus 1 and the connection state of the nonvolatile memory 15 are normal.

  In step S15, when it is determined that the power supply and the recording medium are normal, the state determination unit 35 supplies information indicating that the power supply and the recording medium are normal to the read control unit 36, and performs processing. Advances to step S16.

  In step S <b> 16, the writing control unit 34 determines whether or not all data for the image data to be recorded has been recorded in the nonvolatile memory 15, that is, all of the image data and all of the management information are stored in the nonvolatile memory 15. It is determined whether or not it has been written.

  If it is determined in step S16 that the image data to be recorded has not been recorded in the nonvolatile memory 15, that is, it is determined that not all of the image data and all of the management information has been written. Returning to step S11, the processing after step S11 is repeated.

  In step S13 after the second time, the write control unit 34 controls writing of the image data (mdat data) supplied from the compression unit 32 to the nonvolatile memory 15 in the compressed order as the mdat file 71. That is, in the second and subsequent steps S13, the writing control unit 34 stores the mdat data supplied from the compression unit 32 for the image data to be recorded in the mdat file 71 of the nonvolatile memory 15 in the order of compression. Let it be written.

  More specifically, the conversion unit 51 of the write control unit 34 converts the mdat data supplied from the compression unit 32 so that it can be added to the mdat file 71 of the nonvolatile memory 15. The write control unit 34 causes the non-volatile memory 15 to write the mdat data converted so that it can be additionally written to the mdat file 71 in the order of compression.

  In step S14 after the second time, the writing control unit 34 stores the management information (moov data) nonvolatile memory 15 supplied from the management information acquisition unit 33 in the order of compression of the image data as the moov file 72. Control writing to. That is, in the second and subsequent steps S14, the write control unit 34 stores the moov data supplied from the management information acquisition unit 33 for the image data to be recorded in the nonvolatile memory in the order in which the image data is compressed. Write to the moov file 72.

  More specifically, the conversion unit 51 of the write control unit 34 converts the moov data supplied from the management information acquisition unit 33 so that it can be added to the moov file 72 of the nonvolatile memory 15. The writing control unit 34 causes the moov data converted so that it can be additionally written to the nonvolatile memory 15 to be stored in the moov file 72 in the order of compression of the image data.

  In this way, the compressed image data and its management information are written in the nonvolatile memory 15 as the mdat file 71 and the moov file 72 in the order in which the image data is compressed.

  On the other hand, if it is determined in step S16 that all the image data to be recorded has been recorded in the nonvolatile memory 15, that is, all of the image data and all of the management information have been written in the nonvolatile memory 15. The writing control unit 34 supplies information indicating that all of the image data and all of the management information have been written to the reading control unit 36, and the process proceeds to step S17.

  In step S17, the read control unit 36 writes all of the image data and all of the management information in the nonvolatile memory 15, and the state of the power supply and the recording medium is normal, so the mdat file 71 from the nonvolatile memory 15 and Controls reading of the moov file 72. The read control unit 36 supplies the read mdat file 71 and moov file 72 to the generation unit 37.

  In step S18, the generation unit 37 extracts mdat data that is all of the compressed image data and moov data that is all of the management information from the mdat file 71 and the moov file 72 supplied from the read control unit 36. Then, an MP4 format file in which mdat data that is all of the compressed image data and moov data that is all of the management information is stored is generated. The generation unit 37 supplies the generated MP4 format file to the write control unit 34.

  In step S <b> 19, the write control unit 34 writes the MP4 format file supplied from the generation unit 37 in the nonvolatile memory 15.

  In step S20, the deletion unit 52 of the write control unit 34 deletes the mdat file 71 and the moov file 72 read in step S17, which are recorded in the nonvolatile memory 15, The process ends.

  On the other hand, if it is determined in step S15 that the state of the power source and the recording medium is not normal, the process ends.

  As described above, the recording device 1 writes the image data and the management information thereof as files on the recording medium, and the image data and the management information are obtained from the image data and the management information recorded as files on the recording medium. A stored file that conforms to the standard can be created.

  Next, data restoration processing in the recording apparatus 1 will be described.

  The control unit 12 of the recording apparatus 1 is, for example, shown in FIG. 4 after an accident such as a power failure or removal of the recording medium occurs while writing image data and management information thereof as files to the recording medium. In step S15 of the flowchart, after it is determined that the power supply and the recording medium are not normal, the data recovery process is started when the power supply is turned on or the recording medium is inserted.

  FIG. 5 is a flowchart illustrating an example of data restoration processing in the recording apparatus 1.

  In step S <b> 31, the search unit 53 of the read control unit 36 searches for the mdat file 71 and the moov file 72 from the files recorded in the nonvolatile memory 15.

  In step S32, the search unit 53 determines whether or not the mdat file 71 and the moov file 72 exist. If it is determined in step S32 that the mdat file 71 and the moov file 72 exist, that is, if the mdat file 71 and the moov file 72 are recorded in the nonvolatile memory 15 as a result of the search, the process proceeds to step S33. move on.

  In step S33, the read control unit 36 reads the mdat file 71 and the moov file 72 from the nonvolatile memory 15 because the mdat file 71 and the moov file 72 exist in the nonvolatile memory 15 as a result of the search by the search unit 53. To control. The read control unit 36 supplies the read mdat file 71 and moov file 72 to the generation unit 37.

  In step S34, the generation unit 37 extracts the compressed mdat data and the management information moov data from the mdat file 71 and the moov file 72 supplied from the read control unit 36, and compresses them. An MP4 format file storing the mdat data that is the image data and the moov data that is the management information is generated. That is, the generation unit 37 restores an MP4 format file from the mdat file 71 and the moov file 72. The generation unit 37 supplies the restored MP4 format file to the write control unit 34.

  In step S <b> 35, the write control unit 34 writes the restored MP4 format file supplied from the generation unit 37 to the nonvolatile memory 15.

  In step S36, the deletion unit 52 of the write control unit 34 deletes the mdat file 71 and the moov file 72 read in step S33, which are recorded in the nonvolatile memory 15, The process ends.

  On the other hand, if it is determined in step S32 that the mdat file 71 or the moov file 72 does not exist, that is, if the mdat file 71 and the moov file 72 are not recorded in the nonvolatile memory 15 as a result of the search, the process is performed. finish.

  As described above, the recording device 1 can record a reproducible file even in the event of a power failure during recording or an accident such as the recording medium being the nonvolatile memory 15 being removed.

  In the above description, the mdat file 71, the moov file 72, and the MP4 format file are recorded in the nonvolatile memory 15, but may be recorded in the removable medium 17 via the drive 16.

  In addition, the file generated by the generation unit 37 is not limited to the MP4 file format, and may be a file conforming to the ISO base data format.

  As described above, when image data recording is controlled, compressed image data can be recorded on a nonvolatile recording medium. In addition, the writing of the image data in the compressed order to the recording medium as the first file is controlled, and the recording medium for the management information of the image data in the order of the compression of the image data as the second file Control the writing to the recording medium, the reading of the first file and the second file from the recording medium, the compressed image data and management from the read first file and the second file When a third file storing information is generated, the file can be recorded with a smaller internal memory capacity, and an accident such as a power failure or media being removed during recording occurs. Even in such a case, a reproducible file can be recorded.

  Further, the present invention can be applied to a digital video camera, a mobile phone, or the like that can record image data.

  The embodiment of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

It is a figure which shows the example of the recording device which is one embodiment of this invention. It is a figure which shows the example of a structure of a non-volatile memory. It is a figure which shows the example of a structure of the file of MP4 format. 10 is a flowchart illustrating an example of file recording processing. It is a flowchart explaining the example of the process of a data return.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Recording device, 11 Input part, 12 Control part, 13 Playback part, 14 Power supply part, 15 Non-volatile memory, 16 Drive, 17 Removable media, 31 Volatile memory, 32 Compression part, 33 Management information acquisition part, 34 Writing Control unit, 35 state determination unit, 36 read control unit, 37 generation unit, 51 conversion unit, 52 deletion unit, 53 search unit, 71 mdat file, 72 moov file

Claims (7)

In a recording apparatus for recording compressed image data on a non-volatile recording medium,
Control of writing the image data in the compressed order to the recording medium as the first file, and the management information of the image data in the order of compression of the image data as the second file Write control means for controlling writing to the recording medium;
Read control means for controlling reading of the first file and the second file from the recording medium;
A recording apparatus comprising: a generating unit configured to generate a third file storing the compressed image data and the management information from the read first file and the second file. The information processing apparatus according to claim 1, wherein the writing control unit adds the image data to one first file in the order of compression, and adds the management information to one second file. The write control means controls writing of the generated third file to the recording medium and deletes the first file and the second file recorded on the recording medium. The recording apparatus according to 1. A power supply for supplying power, and a state determination means for determining whether the state of the connected recording medium is normal,
The writing control means determines whether all of the image data and all of the management information have been written when it is determined that the power supply that supplies power and the state of the connected recording medium are normal. Judgment,
When it is determined that all of the image data and all of the management information have been written, the generation means, from the first file and the second file, adds all of the image data and all of the management information. The information processing apparatus according to claim 3, wherein the third file in which is stored is generated. The read control unit searches the first file and the second file from the recording medium, and the first file and the second file exist on the recording medium as a result of the search The information processing apparatus according to claim 3, wherein reading of the first file and the second file is controlled. In a recording method for recording compressed image data on a non-volatile recording medium,
Control of writing the image data in the compressed order to the recording medium as the first file, and the management information of the image data in the order of compression of the image data as the second file Controlling writing to the recording medium,
Controlling reading of the first file and the second file from the recording medium;
A recording method including a step of generating a third file storing the compressed image data and the management information from the read first file and the second file. In a program for causing a computer to perform processing for recording compressed image data on a non-volatile recording medium,
Control of writing the image data in the compressed order to the recording medium as the first file, and the management information of the image data in the order of compression of the image data as the second file Controlling writing to the recording medium,
Controlling reading of the first file and the second file from the recording medium;
A program including a step of generating a third file storing the compressed image data and the management information from the read first file and the second file.

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