JP4957498B2 - Recording apparatus, recording method, and program - Google Patents

Description

  The present invention relates to a recording apparatus, a recording method, and a program.

  2. Description of the Related Art Conventionally, as described in Patent Document 1 below, for example, an apparatus that records data such as input video on a recording medium such as an optical disk in units of clips is known. Here, the clip is a unit of the number of times of imaging processing, and one clip is imaging processing or recording from when the recording button (REC button) of the recording / playback apparatus is operated until the stop button (STOP button) is operated. This corresponds to the imaging process from the operation of the button (REC button) to the operation of the pause button (PAUSE button).

  When video data is recorded on the optical disc, management data is created for each clip. When the disc is inserted, the management information related to all clips recorded on the optical disc is read. Therefore, if the number of clips recorded on the optical disc increases excessively, a lot of time is spent reading the management information, and recording or playback is performed. The standby time for starting becomes longer. For this reason, a certain limit is imposed on the number of clips that can be recorded. In the case of an optical disc, only the number of clips of 300 clips or less can be recorded on the optical disc.

JP 2005-4850 A

  However, if the number of clips that can be recorded is limited, for example, if the operation of recording to pause to recording to pause is repeated in a short time, even if the substantial recording time is short, the clip There is a problem that the number increases and the remaining amount of clips that can be recorded decreases.

  For this reason, when continuous recording is performed by operating the pause button, it is conceivable that new recording is performed in the same clip as the video captured immediately before without creating a new clip. . According to such a method, even when the recording is repeatedly performed by operating the pause button, a plurality of recordings are performed in the same clip, so that the number of recorded clips can be suppressed. It is.

  However, when recording a plurality of data in the same clip, it is necessary to record management information such as a footer and a header at the end of each data recording. At this time, if recording is started again immediately after the pause, writing of the previous data footer, header, etc. has not been completed, so it becomes difficult to record the data immediately after resumption of recording.

  Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to record when a plurality of data can be recorded in a single clip set on a recording medium. It is an object to provide a new and improved recording apparatus, recording method, and program capable of reliably recording data immediately after resuming recording even when recording is resumed immediately after stopping.

  In order to solve the above-described problem, according to an aspect of the present invention, a plurality of pieces of separated data separated in time series are continuously recorded in a single clip for data recording set on a recording medium. A continuation recording unit, and a management information recording cancellation unit that cancels recording of management information related to the one separated data when the next separated data is continuously recorded after the recording of the one separated data is completed. A recording device is provided.

  According to the above configuration, in the recording apparatus in which a plurality of pieces of separated data separated in time series are continuously recorded in a single data recording clip set on the recording medium, one piece of separated data is recorded. When the next separated data is continuously recorded after the process is completed, the recording of the management information related to one separated data is canceled. Accordingly, it is possible to greatly shorten the section in which the input video is not recorded, and it is possible to reliably record the input data from the start of recording the next separated data.

  The management information record canceling unit records the management information when the time until the recording instruction of the next separated data is received is shorter than a predetermined value after the recording of the separated data is completed. You may cancel. According to such a configuration, even after the recording of one separated data is completed, the input data is not recorded from the start of recording the next separated data, even when the time until receiving the instruction for recording the next separated data is short. It becomes possible to record reliably.

  In order to solve the above-described problem, according to another aspect of the present invention, a plurality of separated data separated in time series in a single clip for data recording set on a recording medium is continuously generated. And a step of canceling the recording of the management information related to the first separated data when the next separated data is continuously recorded after the recording of the first separated data is completed. Provided.

  According to the above configuration, in the method of continuously recording a plurality of separated data separated in time series in a single clip for data recording set on a recording medium, recording of one separated data is completed After that, when the next separated data is continuously recorded, the recording of the management information related to one separated data is canceled. Accordingly, it is possible to greatly shorten the section in which the input video is not recorded, and it is possible to reliably record the input data from the start of recording the next separated data.

  Further, in the step of canceling the recording of the management information, the management information when the time until receiving an instruction to record the next separated data is shorter than a predetermined value after the recording of the first separated data is completed. The recording may be canceled. According to such a configuration, even after the recording of one separated data is completed, the input data is not recorded from the start of recording the next separated data, even when the time until receiving the instruction for recording the next separated data is short. It becomes possible to record reliably.

  In order to solve the above-described problem, according to another aspect of the present invention, a plurality of separated data separated in time series in a single clip for data recording set on a recording medium is continuously generated. Means for recording on the first separation data, and when recording the next separation data continuously, means for canceling the recording of the management information relating to the first separation data for causing the computer to function A program is provided.

  According to the above configuration, in the program for continuously recording a plurality of separated data separated in time series in a single data recording clip set on the recording medium, recording of one separated data is completed. After that, when the next separated data is continuously recorded, the recording of the management information related to one separated data is canceled. Accordingly, it is possible to greatly shorten the section in which the input video is not recorded, and it is possible to reliably record the input data from the start of recording the next separated data.

  According to the present invention, when a plurality of data can be recorded in a single clip set on the recording medium, the data immediately after the resumption of recording can be ensured even when the recording is resumed immediately after the recording is stopped. Can be recorded.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  FIG. 1 is a schematic diagram showing a configuration example of a recording / reproducing apparatus 100 according to an embodiment of the present invention, and shows a configuration example of a recorder that records data on a medium 200 such as an optical disc. As shown in FIG. 1, the recording / reproducing apparatus 100 includes a video recording / reproducing memory 102, a video recording / reproducing block 104, a proxy (PROXY) recording / reproducing DSP (Digital Signal Processor) 106, and a control task 108. ing. A medium (recording medium such as an optical disk) 200 for storing a video signal converted into digital data is inserted into the recording / reproducing apparatus 100. In this embodiment, an optical disk is illustrated as the medium 200.

  The video recording / playback memory 102 is a memory for storing data read from the optical disc 200 and data to be written to the optical disc 200. The video recording / playback memory 102 stores data obtained by converting a video signal into digital data. The video recording / playback memory 102 has a main video memory area 102a and a PROXY video memory area 102b. Data sent from the video recording / reproducing block 104 is stored in the main video memory area 102a. In the PROXY video memory area 102b, data sent from the PROXY recording / playback DSP 106 is stored.

  In the recording / reproducing apparatus 100 of the present embodiment, the captured video is compressed at a higher compression rate than the main line data, in addition to the main line data compressed at a relatively low compression rate so as to minimize the deterioration of image quality. The proxy video data (low-resolution video data) is recorded on the optical disc 200. In addition to the main line audio data, high-compression proxy audio data (audio data) and metadata are created as necessary for the captured audio. Proxy video data and proxy audio data are data for performing so-called non-linear editing that is generally performed in recent years, and are high-compression, low-resolution audio, video, and metadata for editing and high-speed access. . Proxy video data, proxy audio data, and the like are used as editing materials after being taken into a personal computer, for example.

  The video recording / playback block 104 receives input of video / audio data (hereinafter referred to as input video). The input signal is a video or audio signal acquired by a video camera (not shown), a video or audio signal reproduced from an arbitrary recording medium (not shown), or the like. The video recording / playback block 104 receives the operation system control from the control task 108, converts (encodes) the input video to predetermined digital data, records it on the optical disc 200, and reads out the data recorded on the optical disc 200. And output as a video signal. In response to a command from the video recording / reproducing block 104, the video recording / reproducing memory 102 records the stored data on the optical disc 200, and stores the data read from the optical disc 200.

  The PROXY recording / playback DSP 106 receives the operation system control from the control task 108, converts (encodes) the signal received from the video recording / playback block 104 into a PROXY image during ENC operation, and writes it to the video recording / playback memory 102. Do. Further, during the DEC operation, the PROXY image is converted (decoded) into video output data (DEC image) and output to the display device 300 such as a monitor.

  The control task 108 controls the video recording / playback block 104 and the PROXY recording / playback DSP 106 in accordance with a recording instruction input from the operation panel 400. The operation panel 400 is provided with a recording button (REC) 402, a pause button (PAUSE) 404, and a recording stop button (STOP) 406.

  When the recording button (REC) 402 is pressed (during recording), the control task 108 switches the PROXY recording / playback DSP 106 to the ENC operation. Further, the control task 108 performs control so that the video recording / playback block 104 converts the input signal into a recording format, stores the converted input signal in the video recording / playback memory 102, and writes it to the optical disc 200 during recording. Do. The control task 108 performs write control when writing to the optical disc 200 and performs read control when reading from the optical disc 200.

  FIG. 2 is a schematic diagram showing a data flow in the configuration of FIG. In FIG. 2, the arrows indicated by broken lines indicate the flow of data when the main line drawing is recorded. Moreover, the arrow shown with a dashed-dotted line has shown the flow of the data at the time of recording a PROXY image.

  As shown in FIG. 2, when a main line image is recorded, the input video is sent from the video recording / playback block 104 to the video recording / playback memory 102 and recorded on the optical disc 200. The input video is output from the video recording / playback block 104 to the display device 300 via the PROXY recording / playback DSP 106.

  On the other hand, when a PROXY image is recorded, an ENC operation is performed, and video data (ENC image) is sent from the PROXY recording / playback DSP 106 to the video recording / playback memory 102 and recorded on the optical disc 200.

  The recording / reproducing apparatus 100 includes a pickup unit (not shown) for recording information on the optical disc 200. At the time of recording, the pickup unit records a recording signal on the optical disc 200 with laser light. At the time of reproduction, the optical disc 200 is irradiated with laser light, and the reflected light is photoelectrically converted to generate a current signal. In addition, the recording / reproducing apparatus 100 includes a signal processing unit that modulates data to be recorded on the optical disc 200 to generate a recording signal and supplies the recording signal to the pickup unit. The signal processing unit also demodulates the signal read by the pickup unit to generate reproduction data.

  FIG. 3 is a schematic diagram showing data written on the optical disc 200 in the recording / reproducing apparatus 110 of the present embodiment. The recording / reproducing apparatus 100 according to the present embodiment can write data continuously in one clip by operating a pause button (REC PAUSE) 404. FIG. 3 shows data (separated data) written continuously in one clip by this operation.

  As shown in FIG. 3, first, recording of take 1 is started (REC START) by first pressing the recording button 402, and then recording of take 1 is ended when the pause button 404 is pressed down. . Next, when the pause button 404 is pushed down again or the recording button 402 is pushed down, recording of the take 2 is started (REC START). In this way, data of take 1 (Take 1), take 2 (Take 2)... Take 4 (Take 4) can be sequentially recorded in one clip. After the pause button 404 is depressed, a new recording is performed within the same clip by depressing the pause button 404 or the recording button 402. Continuous recording (continuous recording; continuous recording) ). A REC START essential mark (REC START EM) indicating the boundary position is given to the boundary position of each take. When the recording stop button (STOP) 406 is pressed, the clip ends. When the recording button 402 is pressed next, recording of the next clip is started.

  Therefore, as shown in FIG. 3, when continuous recording is performed by operating the pause button 404, a plurality of takes can be recorded in one clip. Thereby, even when a plurality of video scenes are recorded, the number of recorded clips does not increase, and a large number of videos can be recorded until the number of clips reaches the upper limit.

  The data shown in FIG. 3 is recorded in the file recording area of the optical disc 200. Management information (file system) is recorded in the file system recording area of the optical disc 200. The management information is information indicating what kind of file is recorded in the file recording area, and is referred to when the file is read from the optical disc.

  Files such as video / audio data recorded on the optical disc 200 are managed by a file system. For example, when reproducing the optical disc 200, the recording / reproducing apparatus 100 refers to the file system recorded on the optical disc 200, records one or more file names recorded on the optical disc 200, and records each file on the optical disc 200. Get location etc. When the user instructs the reproduction of the desired file, the recording position of the designated file is specified based on the file system, and the video / audio data constituting the file is read from the recording position and reproduced. Data recorded in the file recording area is managed as a file by the file system, and managed as logical data based on a directory structure or the like.

  FIG. 4 is a block diagram showing a functional configuration of the control task 108. As shown in FIG. 4, the control task 108 includes a continuous recording unit (continuous recording unit) 108a, a management information recording canceling unit 108b, a data copying unit 108c, and a data deleting unit 108d. When continuous recording is performed by operating the pause button 404 described above, the continuous recording unit (continuous recording unit) 108a performs control to continuously record data in a single clip. . The functions of the management information record canceling unit 108b, the data copying unit 108c, and the data deleting unit 108d will be described later.

  FIG. 5 is a timing chart showing the operation of the recording / reproducing apparatus 100 according to the present embodiment, and a schematic diagram showing data written on the optical disc 200. Here, FIG. 5A illustrates the timing at which input video data is input, the timing at which data is stored in the video recording / playback memory 102, and the data on the optical disc 200 in the recording / playback apparatus 100 according to the present embodiment. 6 is a timing chart showing in parallel the timing of writing and the timing of operation of the control task 108;

  As shown in FIG. 5A, a predetermined delay (time lag) occurs in the timing at which data is stored in the video recording / playback memory 102 with respect to the timing at which input video data is input. Similarly, a predetermined delay (time lag) occurs in the timing at which data is written into the optical disc 200 with respect to the timing at which data is stored in the video recording / playback memory 102.

  Recording start time point 1 (REC) shown in FIG. 5A is a time point when the recording button 402 is pressed by the user and the recording operation starts. At this timing, recording of take 1 shown in FIG. 3 starts. To do. The video recording / playback memory 102 stores data called annual ring data as data to be written to the optical disc 200. Here, one annual ring data corresponds to an input video every 2 seconds. The annual ring data includes audio data, video data, proxy data, and metadata, and a plurality of these data are arranged in time series in the annual ring data every 2 seconds. The annual ring data stored in the video recording / playback memory 102 is sequentially written on the optical disc 200.

  The recording stop time point shown in FIG. 5A is a time point when the user presses the pause button 404 and recording of take 1 is stopped. In the example of FIG. 5, the recording stop time is in the middle of input of input video 5. For this reason, the data of the annual ring 5 recorded corresponding to the input 5 is less than the data for 2 seconds. Therefore, the data amount of the annual ring 5 recorded on the optical disc 200 is smaller than the data amount of the other annual rings 1 to 4.

  When the pause button 404 is pressed at the time of recording stop, the state of the control task 108 becomes a creation state of fill, footer, and header (management information creation state), and video recording is performed. Fill, footer, and header data are stored in the reproduction memory 102. Of the management information, “Fill” is data for immediately entering dummy data of a specific size and rounding the size in order to efficiently manage memory and media. The header is an area for storing information (recording format, size, start time code, etc.) necessary for reproducing the corresponding clip. The footer is data indicating the end of the clip. The stored fill, footer, and header data are written to the optical disc 200. After the fill, footer, and header creation states, the control task 108 enters a media write wait state, and the video recording / playback memory 102 enters a write wait state.

  When the recording button 402 is pressed again at the recording start time point 2 (REC) and continuous recording is performed, the input video (after input 12) sent to the video recording / playback memory 102 after waiting for media writing is recorded. Is stored. Immediately after the media write waiting time, the data of the annual ring 5 that was less than 2 seconds in the take 1 is stored again in the video recording / playback memory 102, and a part of the data of the input 12 is included in the data of the annual ring 5. Added. Thereby, the data of the annual ring 5 is converted into data for 2 seconds (a part of the annual ring 5 + input 12) and stored in the video recording / reproducing memory 102. After the data of the annual ring 5, the data of the annual ring 6 and the annual ring 7 corresponding to the input video for 2 seconds are sequentially stored. Data stored in the video recording / playback memory 102 is written to the optical disc 200 with a certain delay. As described above, the data of the last annual ring 5 of the take 1 is copied at the beginning of the take 2 and recorded on the optical disc 200. This processing is performed by the data copying unit 108c in FIG.

  FIG. 5B shows data written on the optical disc 200 with the position (1) shown in FIG. 5A as the end point. FIG. 5C shows data written on the disc with the position (2) in FIG. 5A as the end point. As shown in FIG. 5B, when the take 1 is completed, a fill, a footer, and a header are written. After that, as shown in FIG. 5C, when the ring 5 and 6 data of the take 2 are written, the data of the ring 5, fill, footer, and header written at the end of the take 1 are logically deleted. Is done. The data deletion is performed by the data deletion unit 108d in FIG. As described above, the data of the annual ring 5 of the take 1 is written again at the beginning of the take 2, and at the end of the take 2, the fill, footer, and header data are written in the same manner as at the end of the take 1. When a clip ends, the fill, footer, and header data recorded in the last take is left as management information for that clip, and the fill, footer, and header data for other takes are logically deleted. It becomes the state.

  As shown in FIG. 5, immediately after the pause button 404 is pressed down at the recording stop time, when the recording button 402 is pressed at the recording start time point 2 (REC) and continuous recording is performed, the video recording / playback operation is performed. This is because input video data cannot be stored while fill, footer, and header data are stored in the memory 102. For this reason, the data from the input 6 to the input 11 sent after the recording start time 2 (REC) cannot be recorded on the optical disc 200, and the data is recorded immediately after the recording start time 2 (REC). I can't.

  For this reason, in the present embodiment, when continuous recording is performed immediately after the pause button 404 is pressed down at the time of recording stop, control is performed so that the fill, footer, and header data are not recorded on the optical disc 200. I do. FIG. 6 is a schematic diagram showing a case where fill, footer, and header data are not recorded on the optical disc 200.

  In FIG. 6A, the operation up to the recording stop time is the same as in FIG. When the pause button 404 is pressed when the recording is stopped, the state of the control task 108 is once filled, footer, or header, but the recording button 402 is pressed at the recording start time 2 (REC). In response, cancel the fill, footer, and header creation status. This process is performed by the management information recording cancel unit 108b of FIG. As a result, the fill data is stored in the video recording / playback memory 102 until the cancellation, but after that, the video recording / playback memory 102 enters a cancel waiting state.

  As a result, the video recording / playback memory 102 stores the input video (after input 7) sent after waiting for the media writing. Immediately after the media write waiting time, the data of the annual ring 5 that was less than 2 seconds in the take 1 is stored again in the video recording / playback memory 102, and a part of the data of the input 7 is included in the data of the annual ring 5. Added. Thereby, the data of the annual ring 5 is converted into data for 2 seconds (a part of the annual ring 5 + input 7) and stored in the video recording / reproducing memory 102. After the data of the annual ring 5, the data of the annual rings 6 to 12 corresponding to the input video for 2 seconds are sequentially stored. Data stored in the video recording / playback memory 102 is written to the optical disc 200 with a certain delay.

  FIG. 6B shows data written on the optical disc 200 with the position (1) shown in FIG. 6A as the end point. FIG. 6C shows data written on the disc with the position (2) in FIG. 6A as the end point. As shown in FIG. 6B, when the recording of the management information is canceled, data up to the annual ring 4 is written at the end of the take 1. As shown in FIG. 6C, since the recording of the management information is cancelled, the data of the annual rings 5 to 10 written in the take 2 is written following the data of the annual ring 4.

  As is apparent from a comparison between FIG. 5 and FIG. 6, in the processing of FIG. 6, since the creation state of management information such as fill, footer, and header is canceled, the fill, footer, and header are stored in the video recording / playback memory 102. The video recording / playback memory 102 can be put in a medium writing standby state at an earlier stage. Therefore, it is possible to write the data after the input 7 on the optical disc 200, and it is possible to greatly shorten the section where the input video is not recorded. Therefore, even when continuous recording is started immediately after the recording is paused, it is possible to record the input video immediately after the start of continuous recording.

  Whether or not to cancel the recording of identification information such as a fill, footer, and header can be determined according to the time from the recording stop time to the recording start time 2, for example. In this case, when the time from the recording stop time to the recording start time 2 is shorter than the predetermined value, the recording of the identification information is canceled. When the time from the recording stop time to the recording start time 2 is sufficiently long, the period during which the input video is not recorded becomes shorter, so that it is not necessary to cancel the recording of the identification information.

  Next, a processing procedure of the recording / reproducing apparatus 100 according to the present embodiment will be described based on the sequence diagram of FIG. First, in step S <b> 1, the recording button 402 is pressed and a recording start request is made to the control task 108. Next, in steps S2 and S3, an encoding (ENC) start request is issued to the video recording / reproducing block 104 and the PROXY recording / reproducing DSP 106.

  Next, in step S4, it is determined whether or not the encoding of the input video corresponding to one annual ring is completed. If the encoding is completed, the optical disc is recorded on the video recording / playback memory 102 in step S5. A write request to 200 is issued. On the other hand, if the encoding has not been completed, the encoding control is performed on the video recording / reproducing block 104 and the PROXY recording / reproducing DSP 106 in steps S6 and S7.

  Next, in step S8, it is determined whether or not a recording stop request is issued by pressing down the pause button 404. If a recording stop request is issued, the process proceeds to step S10. On the other hand, if a recording stop request has not been issued, the process returns to step S4.

  Next, in step S10, it is determined whether or not a recording start request by continuous recording has been issued after a recording stop request has been issued. If a recording start request is issued, writing to the optical disc 200 is canceled in step S11, and creation of a fill, footer, and header is canceled in step S12. After step S12, the process returns to step S2.

  On the other hand, if a recording start request is not issued in step S10, a fill is created (steps S13 and S14), and a footer is created (steps S15 and S16). Thereafter, a header is created (steps S17 and S18), and writing to the optical disc 200 is performed in step S19.

  As described above, in the recording / reproducing apparatus 100 according to the present embodiment, when continuous recording is performed in the recording / reproducing apparatus 100 capable of recording a plurality of input videos in one clip, Cancel recording of management information such as footer and header. As a result, at the start of continuous recording, it is possible to greatly shorten the section in which the input video is not recorded, and it is possible to record the input video immediately after the start of continuous recording. Accordingly, it is possible to record a user's desired video during continuous recording.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

It is a schematic diagram which shows the structural example of the recording / reproducing apparatus which concerns on one Embodiment of this invention. FIG. 2 is a schematic diagram showing a data flow in the configuration of FIG. 1. In the recording / reproducing apparatus of this embodiment, it is a schematic diagram which shows the data written on the optical disk by the continuous video recording. It is a block diagram which shows the function structure of a control task. 4 is a timing chart showing in parallel a timing at which input video data is input, a timing at which data is stored in a video recording / playback memory, a timing at which data is written to an optical disc, and an operation timing of a control task. It is a timing chart which shows operation | movement when not recording management information on an optical disk. It is a sequence diagram which shows the process sequence of a recording / reproducing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Recording / reproducing apparatus 108 Control task 108a Continuous recording part 108b Management information recording cancellation part 108c Data copying part 108d Data deletion part

Claims (5)

A continuous recording unit that continuously records a plurality of separated data separated in a time series in a single clip for data recording set in a recording medium every predetermined time;
After the recording of one separated data is stopped , when recording the next separated data continuously, the recording of the management information regarding the one separated data is canceled, and after the recording of the one separated data is stopped , A management information recording cancel unit that does not cancel the recording of the management information related to the one separated data when the next separated data is not continuously recorded;
A recording apparatus comprising: The management information recording cancel unit cancels the recording of the management information when the time until the recording instruction of the next separated data is received is shorter than a predetermined value after the recording of the first separated data is stopped. The recording of the management information is not canceled when the time until receiving the instruction to record the next separated data after the recording of the separated data is stopped is a predetermined value or more. The recording apparatus according to claim 1. A step of continuously recording a plurality of separated data separated in a time series in a single clip for data recording set in a recording medium every predetermined time;
After the recording of one separated data is stopped , when the next separated data is continuously recorded, the recording of the management information regarding the one separated data is canceled and the recording of the one separated data is stopped. When not recording the next separated data continuously, the step of not canceling the recording of the management information related to the one separated data;
A recording method comprising: In the step of canceling the recording of the management information, if the time until receiving an instruction to record the next separated data is shorter than a predetermined value after the recording of the first separated data is stopped , the management information After the recording is canceled and the recording of the first separated data is stopped , the recording of the management information is not canceled when the time until receiving an instruction to record the next separated data is a predetermined value or more. The recording method according to claim 3. Means for continuously recording a plurality of separated data separated in a time series in a single clip for data recording set in a recording medium every predetermined time;
After the recording of one separated data is stopped , when recording the next separated data continuously, the recording of the management information regarding the one separated data is canceled, and after the recording of the one separated data is stopped , Means for not canceling the recording of the management information relating to the one separated data when the next separated data is not continuously recorded;
As a program to make the computer function as.

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