JP2009123300A - Data recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data recording device which sufficiently exhibits the throughput by effectively utilizing a processing idle time without waste. <P>SOLUTION: A data processing means 7 compression-processes intermittently each of buffering data which is obtained by dividing, for each buffering time, content data being a plurality of sources of surrounding image and AV content. etc., and repeatedly over-writes compressed data 20a and preserves the data in a memory 16 for over-writing. At the time, a control means 10 causes the data processing means 7 to compression-process other content data of the plurality of sources by utilizing a processing idle time resulting from subtracting a processing required time of the data processing means 7 from the buffering time. The compressed data 20a read out from the memory 16 for over-writing is preserved in a memory 20 for preserving. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a data recording apparatus that compresses content data of a certain source and stores it in a recording medium.

  2. Description of the Related Art In recent years, drive recorders that capture images of surroundings on a vehicle and record the image data on a recording medium are becoming widespread. In a conventional drive recorder, a surrounding image is constantly photographed using a camera. For example, when an accident detection is detected by an impact detection sensor, the compression unit configured by a DSP (Digital Signal Processor) or the like is used. The video data is compressed and then recorded on the recording medium. The reason for compressing and recording data in this way is to record as much video data as possible on a recording medium built in the drive recorder.

JP 2000-6854 A (paragraph number 0008, FIG. 1)

  In the conventional drive recorder, the compression unit intermittently performs compression processing in buffered units of the video data, and there is actually a processing free time during which the compression unit is not performing compression processing. For this reason, in the conventional drive recorder, it is desired to perform the compression process by the compression unit more efficiently.

  The problem to be solved by the present invention includes the above-described problem as an example.

  In order to solve the above problem, the invention according to claim 1 is characterized in that one data processing means for intermittently compressing buffering data obtained by dividing content data of a plurality of sources for each buffering time, and the data The overwriting memory for repeatedly overwriting and saving the compressed data processed by the processing means, and the processing free time obtained by subtracting the processing time required for the data processing means from the buffering time, the data processing means Control means for compressing other content data of the source, and a storage memory for storing the compressed data read from the overwriting memory.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
<First Embodiment>
FIG. 1 is a block diagram showing an example of an electrical configuration of a drive recorder 1 as the first embodiment.
The drive recorder 1 includes a camera 3, a control unit 10, an impact detection sensor 13, a DSP (Digital Signal Processor) 17, a vehicle sensor 33, an overwrite memory 16 and a storage memory 20. The drive recorder 1 may be configured such that the camera 3 can be attached and detached externally. For example, a CD (Compact Disc) player 19 is connected to the drive recorder 1. In the following description, when touching the drive recorder 1, it is expressed as “drive recorder side”, and when touching the CD player 19, it is expressed as “AV content side”.

  The control unit 10 controls the camera 3, the impact detection sensor 13, the DSP 17, the vehicle sensor 33, the overwrite memory 16, and the storage memory 20. The CD player 19 is an example of content reproducing means, and has a function of reproducing music data recorded on an information recording medium such as a compact disc. When the CD player 19 is operating, the CD player 19 instructs the control unit 10 to perform AV ripping.

  The camera 3 corresponds to a photographing unit and has a function of constantly photographing the periphery of the vehicle. The camera 3 includes an A / D conversion unit (not shown), and outputs video data 3 a that has been converted into digital data by the A / D conversion unit to the control unit 10. The video data 3a corresponds to one type of content data among a plurality of sources described later. That is, the surrounding image taken by the camera 3 corresponds to one type of source.

  The DSP 17 corresponds to data processing means, and under the control of the control unit 10, the buffering data 3 b obtained by dividing the content data of a plurality of sources for each predetermined buffering time is intermittently compressed. In this embodiment, the buffering time of the drive recorder 1 is called “DR buffering time”. In the present embodiment, one DSP 17 is provided in the drive recorder 1.

  The overwriting memory 16 is a volatile information storage medium that repeatedly overwrites and saves the compressed data 20a processed by the DSP 17.

  The control unit 10 corresponds to control means, and uses the processing free time obtained by subtracting the processing time required for the DSP 17 from the buffering time to cause the DSP 17 to compress other content data of a plurality of sources. At this time, the DSP 17 intermittently compresses buffering data obtained by dividing other content data of a plurality of sources into predetermined buffering times. The overwriting memory 16 is a volatile information storage medium that stores the post-compression data 20a compressed by the DSP 17 described above.

  The vehicle sensor 33 detects the state of the vehicle. Specifically, the vehicle sensor 33 detects vehicle engine speed and acquires vehicle information. The vehicle sensor 33 detects the moving distance per unit time of the vehicle and acquires vehicle information related to the speed of the vehicle. The vehicle sensor 33 acquires vehicle information at predetermined intervals and outputs it to the control unit 10. The impact detection sensor 13 corresponds to an impact detection means, and outputs a trigger to the control unit 10 when the detected impact is a specified value or more.

  The storage memory 20 is a non-volatile information recording medium such as a flash memory. Here, at least one of the plurality of source content data described above is, for example, video data 3 a obtained by photographing the surroundings of the vehicle with the camera 3. When the control unit 10 receives a trigger from the impact detection sensor 13, the storage memory 20 reads and stores the compressed data 20 a related to the video data 3 a from the overwriting memory 16.

  The other of the plurality of source content data is the other content data as follows. Examples of the other content data here include music data recorded on a CD (Compact Disc) and movie data recorded on a DVD (Digital Versatile Disk). In the present embodiment, the former is exemplified as other content data, and such data is collectively referred to as “AV content”.

The drive recorder 1 is one configuration example as described above. Next, drive record processing as an operation example according to the one configuration example will be described with reference to FIG.
FIG. 2 is a diagram showing an example of specific contents of the drive record processing shown in FIG.
First, in the drive recorder 1, the camera 3 continues to operate in a state where the vehicle engine is not stopped, continuously captures surrounding images, and outputs video data 3 a to the control unit 10. The control unit 10 successively generates buffered data 3b obtained by buffering the video data 3a for each DR buffering time, and outputs the buffered data 3b to the DSP 17.

  In the DSP 17, compression processing is intermittently executed in the DSP processing area 17a along the time axis t. Here, the “DR buffering time” is the time length of the buffering data 3b divided for each data amount when the control unit 10 stores the video data 3a from the camera 3 in the overwrite memory 16. Represents.

  When compression processing is performed by the DSP 17, the compressed data 3 c is overwritten and saved in the overwrite memory 16 one after another. The overwriting memory 16 can store several pieces of post-compression data 3c according to the storage capacity. When there is no room in the storage capacity, the new post-compression data 3c is repeatedly overwritten and stored on the first post-compression data 3c. be able to.

  In the present embodiment, the drive recorder 1 includes the following DSP 17. That is, the DSP 17 has a capability of performing the compression process in a time shorter than the real time of the buffering data 3b. In this embodiment, the control unit 10 causes the DSP 17 to perform compression processing intermittently, and in this embodiment, for example, periodically.

  Therefore, in the DSP 17, processing vacancies are intermittently generated between a certain compression process and the next compression process. The control unit 10 executes AV ripping processing to be described later intermittently using this vacancy. The AV ripping process here corresponds to an AV ripping process described later.

FIG. 3 is a diagram showing a specific example of the processing time of the DSP 17 in the drive record processing shown in FIG.
In the present embodiment, the control unit 10 processes the buffering data 3b at the same time length Tb. In the processing time Tb of one buffering data 3b, the DSP processing area 17a of the DSP 17 includes the empty Po and the compression processing R.

  The empty Po in the DSP processing area 17a indicates a time zone in which there is an empty space for processing by the DSP 17. On the other hand, the compression process R indicates a time zone in which there is no vacancy in the process by the DSP 17.

  FIG. 4 is a flowchart showing an example of the procedure of drive record processing. FIG. 5 is a diagram showing an example of a state in which the drive record process shown in FIG. 4 is executed.

  First, in step S1, the control unit 10 determines whether or not the vehicle engine is stopped. Specifically, the control unit 10 determines whether the engine of the vehicle is stopped based on the engine speed included in the vehicle information from the vehicle sensor 33. The control unit 10 ends the drive record process when the engine of the vehicle is stopped, and executes the following step S2 when the engine of the vehicle is not stopped.

  Next, in step S2, the control unit 10 determines whether there is an instruction for AV ripping of the CD player 19, for example. The control unit 10 executes step S20 described later when this AV ripping instruction is given, and executes the following step S3 when there is no AV ripping process.

  In step S20, for example, AV ripping processing is executed in accordance with AV content reproduction (or reading) by the CD player 19. In this AV ripping process, the control unit 10 buffers the content data from the CD player 19 every AV buffering time, and generates the buffering data 3d.

  In step S3, the control unit 10 determines the DR buffering time as the standard buffering time. Here, the “standard buffering time” represents the time of the buffering data 3b obtained when the above-described video data 3a is buffered for each predetermined standard constant data amount. In the present embodiment, the DR buffering time set in this way is also called “standard DR buffering time”.

  Next, in step S4, the control unit 10 executes DR buffering. This DR buffering means that the video data acquired by the camera 3 as described above is divided for each DR buffering time to generate the buffering data 3b described above.

  Next, in step S5, the control unit 10 waits until the DR buffering time elapses, and executes the following step S6 when the DR buffering time elapses.

In step S6, the control unit 10 controls the DSP 17, and causes the DSP 17 to compress the buffering data 3b as shown in FIG. At this time, the control unit 10 calculates the idle time P0 by the following equation (1).
Free time P0 = DR buffering time Z-DR compression processing time R (1)

  The control unit 10 can process the buffering data 3d generated in the above-described AV ripping process without waste in this empty time P0 where the DSP 17 was not originally used.

  Next, in step S7, the control unit 10 writes the compressed data 20a generated by compressing the buffering data 3b into the overwriting memory 16 described above. As described above, the control unit 10 divides the video data 3a that is continuously input into the buffering data 3b for each DR buffering time, performs the compression process, and repeats the process of overwriting the overwriting memory 16.

  Next, in step S <b> 8, it is determined whether the control unit 10 has received a trigger from the impact detection sensor 13. The control unit 10 receives the trigger as described above when, for example, an impact of a specified value or more is given due to a vehicle accident. When the control unit 10 has not received the trigger, the control unit 10 executes step S10 described later. When the control unit 10 has received the trigger, the control unit 10 executes the following step S9.

  In step S <b> 9, the control unit 10 saves the compressed data 20 a overwritten in the overwriting memory 16 in the saving memory 20. Since the storage memory 20 is a non-volatile information recording medium as described above, it can remain unless the post-compression data 20a stored in this way is intentionally deleted.

  Next, in step S10, the control unit 10 determines whether or not the vehicle engine is stopped as in step S1 described above. The control unit 10 ends the drive record process when the vehicle engine is stopped, and executes step S2 described above when the vehicle engine is not stopped.

  In the data recording apparatus 1 (corresponding to a drive recorder) in the above embodiment, one data processing means for intermittently compressing each of the buffering data 3b obtained by dividing the content data 3a of a plurality of sources for each buffering time Z0. 17, an overwriting memory 16 that repeatedly overwrites and saves the compressed data 20 a processed by the data processing unit 17, and a processing free time obtained by subtracting the processing time required for the data processing unit 17 from the buffering time. Control means for causing the data processing means 17 to compress other content data of the plurality of sources, and a storage memory 20 for storing the compressed data 20a read from the overwriting memory 16. Have.

  In this way, even in a configuration in which only one DSP 17 exists, by effectively utilizing the processing free time without waste, the processing power can be fully utilized to efficiently compress each content data of a plurality of sources. Can be processed.

  The data recording apparatus 1 in the above embodiment further includes, in addition to the configuration described above, an impact detection means 13 (impact detection sensor) that outputs a trigger when the detected impact is a specified value or more, At least one of the source content data is video data 3a taken around the vehicle, and when the trigger is output from the impact detection means 13, the control means 10 reads from the overwriting memory 16 The compressed data 3c relating to the video data 3a is read out and stored in the storage memory 20.

  The drive recorder 1 captures the periphery of the vehicle and stores the video data 3a. The drive recorder 1 can effectively use the processing free time of the data processing means 7, and can efficiently use the processing capacity of the data processing means 7 to compress the video data and record it in the storage memory.

  In the data recording apparatus 1 in the above embodiment, in addition to the above-described configuration, another one of the plurality of source content data is other content data.

  In this way, the drive recorder 1 can compress other content data during the time when the DSP 17 is not compressing the video data 3a described above, that is, the processing idle time. Therefore, the drive recorder 1 can efficiently compress not only the video data 3a described above but also other content data and record it in the storage memory 20.

<Application example of the first embodiment>
In the description so far, the control unit 10 has used the constant free P0 associated with the compression processing of the buffering data 3b as buffering the video data 3a every constant DR buffering time Z0. You can also do as follows.

  In the application example of the first embodiment, the control unit 10 may change the DR buffering time Z one by one according to the empty processing time P described above. Specifically, when the control unit 10 needs to perform a minimum amount of processing when performing the AV ripping processing, the DR is configured to secure a process P for the necessary processing according to the request. The length of the buffering time Z is varied. The processing empty P referred to here corresponds to processing empty P1, P2, etc., which will be described later.

  Note that the control unit 10 may shift the timing of the AV compression process that is a part of the AV ripping process. Further, instead of determining the DR buffering time Z in response to a request as described above, the control unit 10 may determine the DR buffering time Z accordingly when a specific process is selected.

FIG. 6 is a flowchart showing an example of the procedure of the AV ripping process shown in FIG.
First, in step S21, the control unit 10 acquires a free processing time Po based on the standard buffering time. Specifically, as shown in FIG. 7, when the buffering time Tb1, Tb2, etc. of each buffering data 3b is not constant, the control unit 10 has a free space corresponding to the free processing time Po. The processing times P1, P2, etc. and the number of processing times are acquired.

  Next, in step S22, the control unit 10 acquires the compression processing required times Q1, Q2, etc. of each buffering data 3d as the compression processing required time Q for each AV content processing unit. Here, the AV processing represents audio visual processing for recording sound of the CD player 19 or the like, for example. Note that this audio-visual processing may be decompression processing for outputting a video of a DVD (Digital Versatile Disk) player or the like in conjunction with sound (instead of compression processing). Specifically, as shown in FIG. 5, the control unit 10 acquires the compression processing required time Q of each buffering data 3d in the time direction t. Note that “reproduction” corresponds to, for example, a process of decompressing compressed data and returning it to linear.

Next, in step S23, the control unit 10 determines whether or not the following expression (2) is satisfied.
Empty processing time Po ≧ compression processing required time Q (2)

  The control unit 10 executes step S27, which will be described later, when this equation (2) is satisfied, and executes the following step S24 when this equation (2) is not satisfied.

  In step S24, the control unit 10 determines a DR buffering time that changes sequentially as follows instead of the above-described fixed standard DR buffering time as the DR buffering time.

Specifically, the control unit 10 determines the DR buffering time based on the free processing time P and the compression processing necessary time Q from the following equation (in order to determine the length of the buffering data 3b to be buffered): Determine by 3).
DR buffering time Z = compression processing required time Q + DR compression processing time R of AV content side processing unit (3)

  Next, in step S25, the control unit 10 determines whether or not the DR buffering time determined in this way has elapsed, and when it elapses, executes the following step S26. In this step S26, if there is a compression process before that, the control unit 10 determines whether or not the previous compression process has ended, and if it determines that it has ended, executes the following step S27. To do.

  In step S27, the control unit 10 causes the DSP 17 to execute AV compression processing on the buffering data 3d. In this AV compression processing, the control unit 10 changes the length of each buffering data 3d to, for example, the DR buffering time Z5 according to the compression required time Q2, and the buffering data 3d is intermittently sent to the DSP 17. To compress. At the same time, the control unit 10 may execute the sandwiching process of the AV compression process.

  At this time, the control unit 10 waits until the buffering data 3d that has been buffered on the AV content side has been buffered with a predetermined amount of data, waits for the compression processing on the drive recorder 1 to end, and then performs the AV compression processing. May be executed. During this standby, the control unit 10 controls to perform AV buffering for a predetermined amount of data.

  As a modified example in this case, the control unit 10 continues buffering until the compression processing on the drive recorder 1 side is finished without tightening the buffering data 3d buffered until then on the AV content side during standby. May be. In this case, the control unit 10 determines P0 ≧ compression processing time Q + compression processing time R by maximizing the compression processing time R on the drive recorder side for one time with respect to the compression processing required time Q of the AV content processing unit. And DR buffering time Z may be determined.

  As described above, when acquiring the number of processes and the processing time per process, the control unit 10 acquires all the processing times and the processing time for the entire AV ripping process at a time, and acquires all necessary buffers. A ring unit may be determined. The buffering unit here corresponds to the DR buffering time.

  Alternatively, the control unit 10 may acquire and determine a processing time required for processing of the next AV buffering unit based on an appropriate buffering unit on the AV content side, and repeat this. The AV content buffering unit here corresponds to AV buffering time.

  Further, the control unit 10 may change the length of the DR buffering time Z on the drive recorder 1 side as described above, but may change the length of the AV buffering time on the AV content side, Both the DR buffering time Z and the AV buffering time may be changed.

  In the data recording apparatus 1 in the above embodiment, in addition to the above-described configuration, the control means 10 further changes the buffering time according to the processing idle time.

  In this way, even if the processing free time of the DSP 17 changes one by one, the control unit 10 efficiently uses the processing free time of the DSP 17 without waste and efficiently processes the video data 3a and other content data. It can be recorded in the storage memory 20.

Second Embodiment
FIG. 9 is a flowchart illustrating an example of a procedure of drive record processing in the second embodiment. 10 and 11 are diagrams illustrating an example of a state in which drive record processing is executed. This drive record process is executed by the drive recorder 1 having substantially the same configuration as in the first embodiment. For this reason, in the second embodiment, the same configurations and operations are denoted by the same reference numerals as those in FIGS. 1 to 8 in the first embodiment, and the description thereof is omitted. In the following description, differences will be mainly described. .

  In the second embodiment, unlike the first embodiment, the control unit 10 includes a determination unit 11 as indicated by a dotted line shown in FIG. The determination unit 11 has a function of determining whether the DSP 17 is performing processing such as compression processing. Note that the determination unit 11 may be provided separately from the control unit 10.

  First, in step S31, similarly to step S1 described above, the control unit 10 determines whether or not the vehicle engine is stopped. Specifically, the control unit 10 determines whether or not the vehicle engine is stopped based on the engine speed included in the vehicle information from the vehicle sensor 33. The control unit 10 ends the drive record process when the vehicle engine is stopped, and executes the following step S32 when the vehicle engine is not stopped.

  Next, in step S32, the control unit 10 causes the video data 3a from the camera 3 to be linear, and starts overwriting in the overwriting memory 16 as shown in FIG. Here, “linear” indicates that the video data 3a from the camera 3 is not compressed every DR buffering time. In the second embodiment, when the video data 3a is linearly overwritten and recorded in the overwriting memory 16 in this way, this data is called linear data 16a.

  Next, in step S33, it is determined whether the control unit 10 has received a trigger from the impact detection sensor 13 as in step S8 described above. The control unit 10 waits until the trigger is received, and executes the following step S34 when the trigger is received.

  In step S <b> 34, the control unit 10 includes the determination unit 11 as described above, and the determination unit 11 determines whether the DSP 17 is free of processing. When the processing of the DSP 17 is free, the control unit 10 causes the DSP 17 to compress the linear data 16a as shown in FIG. 11, and stores the compressed data 20a in the storage memory 20 (step S36).

  On the other hand, when the control unit 10 receives a trigger from the impact detection sensor 13, for example, the DSP 17 processes the buffering data 3d from the CD player 19 for the ripping process as shown in FIG. If there is no space in the process, the following is performed (step S35).

  That is, the control unit 10 stores the linear data 16a overwritten in the overwriting memory 16 as it is in the storage memory 20 without compressing the linear data 16a in the DSP 17 as shown in FIG. That is, the control unit 10 determines whether or not the DSP 17 is performing processing upon receiving a trigger from the impact detection sensor 13, and changes the storage destination of the linear data 16a.

  In the present embodiment, storing data without performing compression processing in this way is called “linear storage”. In this way, the control unit 10 generates a load on the DSP 17 and the storage memory 20 only when a rarely detected trigger is received, and the DSP 17 is free at other times. Processing on other content of the source can be performed. In the present embodiment, the present invention is not limited to such linear storage, and other methods such as a compression method that is lower in compression than that at the time of storage may be adopted as long as overwriting can be performed by a method that does not place a burden on the DSP 17 or the like. good.

<Application Example of Second Embodiment>
FIG. 14 is a flowchart illustrating an example of the procedure of the process empty check process. 15 to 18 show an example of the state of data processing by the processing empty check process shown in FIG.

  In step S41, when the control unit 10 receives the trigger from the impact detection sensor 13 by the determination unit 11, for example, as shown in FIG. It is determined whether or not the stored linear data 16a exists.

  After storing the compressed data 20a and linear data 16a in the storage memory 20 as shown in FIG. 13, the control unit 10 continues to store the compressed data in the storage memory 20 as shown in FIG. Save the data 20a.

  In step S42, the control unit 10 determines whether or not the processing by the DSP 17 is vacated by the determination unit 11, waits until this processing is vacant, and executes this step S43 as follows.

  In step S43, the control unit 10 causes the DSP 17 to output the linear data 16a stored in the storage memory 20 as shown in FIG. Further, in step S43, the control unit 10 causes the DSP 17 to process the linear data 16a as shown in FIG.

  In the data recording apparatus 1 (corresponding to the drive recorder 1a) in the above embodiment, in addition to the configuration described above, the control means 10 further determines whether or not the data processing means 7 is executing a process. Means 11 (corresponding to the determination unit), and when the determination unit 11 determines that the data processing unit 7 is not executing processing, the content data 16a stored in the overwriting memory 16 is stored. The data is read out and transferred to the data processing means 7 for processing.

  In this way, even in a configuration in which only one DSP 17 exists, by effectively utilizing the processing idle time, it is possible to efficiently compress each content data of a plurality of sources by fully utilizing its processing capacity. can do.

  In the drive recorder 1 in the above embodiment, in addition to the above-described configuration, the control means 10 (corresponding to the control unit) causes the data processing means 7 (corresponding to the DSP) to compress the buffering data. When the determination unit determines that the data processing unit 7 is executing processing, the buffering data 16a is recorded in the storage memory 20 as it is without performing the compression processing. It is characterized by.

  In this way, even if the DSP 17 has no room for compression processing, the buffering data 3b can be stored in the storage memory 20 without delay.

  In the drive recorder 1 according to the above embodiment, in addition to the above-described configuration, the control unit 10 further stores the storage when the determination unit determines that the data processing unit 7 is not executing a compression process thereafter. The buffering data 16a is read from the memory 20 and compressed by the data processing means 7 and stored in the storage memory 20 again.

  In this way, when the DSP 17 can afford the processing, the processing free time is utilized, and the buffering data 3b finally stored in the storage memory 20 is subjected to the compression processing, and the storage memory 20 Can be used effectively. Therefore, a large amount of buffering data 3b, that is, a long-time content can be stored in the storage memory 20.

<Third Embodiment>
FIG. 19 is a block diagram showing a configuration example of the drive recorder 1a in the third embodiment.
The drive recorder 1a in the third embodiment is different in that a temporary storage memory 18 is provided in the configuration of the drive recorder 1 in the first embodiment or the second embodiment. The temporary storage memory 18 temporarily stores the video data 3a as linear data 16a instead of the linear memory 16a instead of the video data 3a when the control unit 10 determines that the processing of the DSP 17 is not sufficient. It is an information recording medium that can be used. The temporary storage memory 18 may be omitted by substituting a part of the storage area of the overwriting memory 16 described above.

  FIG. 20 is a flowchart illustrating an example of the procedure of drive record processing in the third embodiment. 21 and 22 are diagrams illustrating an example of a state in which drive record processing is executed. This drive record process is executed by the drive recorder 1a. For this reason, in the second embodiment, the same configurations and operations are denoted by the same reference numerals as those in FIGS. 1 to 8 in the first embodiment, and the description thereof is omitted. In the following description, differences will be mainly described. .

  In the drive record process in the third embodiment, step S34a is added between step S34 and step S35 in the drive record process shown in FIG. 9, and step S34 and step S36 in the drive record process shown in FIG. Is different in that step S34b is added. In the drive record process in the third embodiment, the description of the same process as the drive record process in the second embodiment is omitted.

  First, in step S34a, when the control unit 10 determines in step S34 that there is no space in the processing of the DSP 17, the control unit 10 uses the video data 3a from the camera 3 as linear data 16a instead of the storage memory 20. The temporary storage memory 18 is selected.

  In step S35a, for example, when the control unit 10 receives a trigger from the impact detection sensor 13, the DSP 17 processes the buffering data 3d from the CD player 19 as shown in FIG. If there is no space, the following processing is executed. That is, the control unit 10 stores the linear data 16a overwritten in the overwriting memory 16 as it is without causing the DSP 17 to compress the linear data 16a in the temporary storage memory 18 as shown in FIG. .

  On the other hand, in step S34b, when the control unit 10 determines in step S34 that the DSP 17 has a free space as shown in FIG. 23, the control unit 10 stores the video data 3a from the camera 3 as linear data 16a. Memory 20 is selected.

  In step S36, as in step S36 in the second embodiment, the control unit 10 causes the DSP 17 to compress the linear data 16a as shown in FIG. 24, and stores the compressed data 20a in the storage memory 20 (step S36). ).

<Application example of the third embodiment>
FIG. 25 is a flowchart illustrating an example of a procedure of processing empty check processing.
In step S51, the control unit 10 determines whether the stored linear data 16a exists in the temporary storage memory 18 described above by the determination unit 11. Next, in step S52, the control unit 10 determines whether or not the processing by the DSP 17 is vacated by the determination unit 11, waits until this processing is vacant, and executes the following step S53 when this processing is vacant.

  In step S <b> 53, the control unit 10 causes the DSP 17 to output the linear data 16 a stored in the temporary storage memory 18. Further, in step S54, the control unit 10 causes the DSP 17 to process the linear data 16a and to store it again in the storage memory 20. In this case, the control unit 10 may store the plurality of linear data 16a in the storage memory 20 first, and collectively process them later by the DSP 17. Finally, in step S55, the control unit 10 deletes the linear data 16a stored in the temporary storage memory 18.

In addition, this embodiment is not restricted above, A various deformation | transformation is possible. Hereinafter, such modifications will be described in order.
In the above-described embodiment, the data recording apparatus is applied to the drive recorders 1 and 1a. However, the present invention is not limited to this. For example, the data recording apparatus may be applied to a digital television receiver. Specifically, each of the above-described embodiments can be applied to a case where the television receiver is such a data recording device, and the received television broadcast data is compressed and recorded.

It is a block diagram which shows the electrical structural example of the drive recorder as 1st Embodiment. It is a figure which shows an example of a mode that the drive record process shown in FIG. 1 is performed. It is a figure which shows an example of a mode that the drive record process shown in FIG. 2 is performed. It is a flowchart which shows an example of the procedure of a drive record process. It is a figure which shows an example of a mode that the drive record process shown in FIG. 4 is performed. 5 is a flowchart illustrating an example of a procedure of AV ripping processing illustrated in FIG. 4. It is a figure which shows an example of a mode that the drive record process shown in FIG. 6 is performed. It is a figure which shows an example of a mode that the drive record process shown in FIG. 6 is performed. It is a flowchart which shows an example of the procedure of the drive record process in 2nd Embodiment. It is a figure which shows an example of a mode that a drive record process is performed. It is a figure which shows an example of a mode that a drive record process is performed. It is a figure which shows an example of a mode that a drive record process is performed. It is a figure which shows an example of a mode that a drive record process is performed. It is a flowchart which shows an example of the procedure of a process empty check process. An example of the state of data processing by the processing empty check processing shown in FIG. 14 is shown. An example of the state of data processing by the processing empty check processing shown in FIG. 14 is shown. An example of the state of data processing by the processing empty check processing shown in FIG. 14 is shown. An example of the state of data processing by the processing empty check processing shown in FIG. 14 is shown. It is a block diagram which shows the structural example of the drive recorder in 3rd Embodiment. It is a flowchart which shows an example of the procedure of the drive record process in 3rd Embodiment. It is a figure which shows an example of a mode that a drive record process is performed. It is a figure which shows an example of a mode that a drive record process is performed. It is a figure which shows an example of a mode that a drive record process is performed. It is a figure which shows an example of a mode that a drive record process is performed. It is a flowchart which shows an example of the procedure of a process empty check process.

Explanation of symbols

1 Drive recorder (equivalent to a data recording device)
1a Drive recorder (equivalent to a data recording device)
3 Camera (equivalent to photographing means)
3a Video data 3b Buffering data 3d Buffering data 10 Control unit (corresponding to control means)
11 Determination unit (corresponding to determination means)
13 Impact detection sensor (equivalent to impact detection means)
16 Overwrite memory 16a Linear data 17 DSP (corresponding to data processing means)
18 Memory for temporary storage 19 CD player 20 Memory for storage 20a Data after compression 33 Vehicle sensor Z0 DR buffering time (corresponding to buffering time)
Z1 DR buffering time (equivalent to buffering time)
Z2 DR buffering time (equivalent to buffering time)
Z3 DR buffering time (equivalent to buffering time)

Claims (7)

One data processing means for intermittently compressing buffering data obtained by dividing content data of a plurality of sources for each buffering time;
An overwriting memory for repeatedly overwriting the compressed data processed by the data processing means;
Control means for causing the data processing means to compress other content data of the plurality of sources using a processing free time obtained by subtracting a processing time required for the data processing means from the buffering time;
A storage memory for storing the compressed data read from the overwriting memory;
A data recording apparatus comprising: The data recording apparatus according to claim 1, wherein
An impact detection means for outputting a trigger when the detected impact is a specified value or more,
At least one of the content data of the plurality of sources is video data taken around the vehicle,
The control means includes
When a trigger is output from the impact detection means, the data recording apparatus reads out the compressed data relating to the video data from the overwriting memory and stores it in the storage memory. The data recording apparatus according to claim 2, wherein
The other one of the content data of the plurality of sources is other content data. The data recording apparatus according to claim 3, wherein
The control means includes
The data recording apparatus, wherein the buffering time is changed one by one according to the processing idle time. The data recording apparatus according to claim 1, wherein
The control means includes
Determination means for determining whether or not the data processing means is executing processing,
A data recording apparatus characterized in that when the data processing means determines that the data processing means is not executing processing by the determination means, the content data stored in the overwriting memory is read and delivered to the data processing means for processing. . The data recording apparatus according to claim 5, wherein
The control means includes
When the data processing means tries to compress the buffering data, and the determination means determines that the data processing means is executing processing, the buffer processing data is not subjected to the compression processing, and the buffer is processed as it is. A data recording apparatus for recording ring data in the storage memory. The data recording apparatus according to claim 6, wherein
The control means includes
When it is determined by the determination means that the data processing means is not executing compression processing after that, the buffering data is read from the storage memory and is compressed by the data processing means, and again stored in the storage memory. A data recording apparatus characterized by being stored.

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