JP2006344308A - Recording device, control method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording device in which data are not lost even if power supply to the recording device is cut off during recording data into a recording medium, a control method, and a program therefor. <P>SOLUTION: A disk camcorder has a disk 9, a CPU 18, a DRAM 19 and a FLASH memory 21. In the case that the CPU 18 is not subjected to PAUSE control, when a certain amount of data are stored in the DRAM 19, the CPU reads data from the DRAM 19 and records the data into the disk 9. On the other hand, in the case that the CPU 18 detects the PAUSE control, the CPU reads data from the DRAM 19 irrespective of the amount of data stored in the DRAM 19, and temporarily stores the data into the FLASH memory 21, then reads the data stored in the FLASH memory 21, and records the data into the disk 9. Moreover, in the case that data recording into the disk 9 is not finished when power is on, the CPU 18 records the data stored in the FLASH memory 21 into the disk 9. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a recording apparatus, a control method, and a program applied to a disk recording apparatus capable of recording a moving image or a still image.

  Conventionally, there is a disk recording apparatus capable of recording data on a disk-shaped recording medium. In the conventional disk recording apparatus, if the power of the disk recording apparatus is turned off by disconnecting the external power supply means or the detachable battery during data recording on the disk-shaped recording medium, the following problems occur. . That is, data recorded in a memory such as RAM is lost without being recorded on the disk-shaped recording medium until the end, or data is reproduced from the disk-shaped recording medium because finalization (end processing) cannot be performed normally. It may become impossible.

Therefore, various techniques have been proposed for the above problems. As a first conventional technique, a disk recording apparatus that protects data by temporarily storing data in a static RAM (SRAM) connected to a backup power supply has been proposed (for example, see Patent Document 1). As a second prior art, finalization information of a disk-shaped recording medium is stored in a flash memory, so that finalization is performed after the battery is restored even when the disk recording device has insufficient battery capacity and cannot be finalized. A method has been proposed (see, for example, Patent Document 2).
JP-A-10-302371 JP 2004-213769 A

  The first technical technique (Patent Document 1) is characterized in that an SRAM is used as a temporary data storage means, and a backup power source is connected to the SRAM in order to protect the data from power-off. However, when the capacity of the backup power supply is low, the data temporarily stored in the SRAM cannot be retained, and the data may be lost before recording the data on the disk-shaped recording medium. is there.

  In addition, the second prior art (Patent Document 2) is characterized in that finalization is performed by monitoring the battery capacity of the disk recording apparatus, and is not intended to protect recorded data. Absent. Therefore, it is possible to make a disc-shaped recording medium capable of reproducing data, but it is not always possible to record the recorded data to the end.

  As described above, the above-described prior art has an insufficient point in that all recorded data is recorded on a disk-shaped recording medium.

  An object of the present invention is to provide a recording apparatus, a control method, and a program that prevent data from being lost even when power supply to the recording apparatus is interrupted during data recording on a recording medium.

  In order to achieve the above object, the present invention includes a volatile storage unit that temporarily stores information data, a non-volatile storage unit that stores information data, and a recording unit that records information data on a recording medium. In accordance with a recording instruction for the information data, the input information data is temporarily stored in the volatile storage unit, and a predetermined amount of the information data is stored in the volatile storage unit. Is stored in the volatile storage unit, and the recording unit is controlled to read and record the information data in the recording medium, and in response to an instruction to stop recording the information data, After stopping the storage of the input information data in the volatile storage unit and reading out the information data stored in the volatile storage unit and storing it in the nonvolatile storage unit, Serial reads information data stored in the nonvolatile storage means, characterized in that it comprises control means for controlling said recording means to record on the recording medium.

  The present invention also provides a first volatile storage means for temporarily storing information data, a second volatile storage means capable of holding stored contents by a backup power source, and a non-volatile storage for storing information data. And a recording device for recording information data on a recording medium, wherein the inputted information data is temporarily stored in the first volatile storage device in response to a recording instruction for the information data. And storing the information data stored in the first volatile storage means in response to the predetermined amount of the information data being stored in the first volatile storage means. Control the recording means to read the information data stored in the second volatile storage means and record it on the recording medium, and to stop recording the information data In Then, the storage of the input information data in the first volatile storage unit is stopped, and the information data stored in the first volatile storage unit is read and stored in the non-volatile storage unit And a control means for controlling the recording means so that the information data stored in the nonvolatile storage means is read out and recorded on the recording medium.

  The present invention also provides a first volatile storage means for temporarily storing information data, a second volatile storage means capable of holding stored data by a backup power source, and a non-volatile storage for storing information data And a recording device for recording information data on a recording medium, the detecting device detecting the remaining amount of the backup power source, and an input according to an instruction to record the information data The information data is temporarily stored in the first volatile storage means, and the first volatile storage is performed in response to the predetermined amount of the information data being stored in the first volatile storage means. The recording is performed so that the information data stored in the storage unit is read out and stored in the second volatile storage unit, and then the information data stored in the second volatile storage unit is read out and recorded on the recording medium. hand And the storage of the input information data in the first volatile storage means is stopped when the remaining amount of the backup power source is a predetermined amount or more in response to an instruction to stop recording the information data. The information data stored in the first volatile storage unit is read out and stored in the second volatile storage unit, and then the information data stored in the second volatile storage unit is read out and the information is stored in the second volatile storage unit. The recording means is controlled to record on a recording medium, and when the remaining amount of the backup power source is less than a predetermined amount in response to an instruction to stop recording the information data, the first information of the input information data And the storage of the information in the first volatile storage means is read out and stored in the nonvolatile storage means, and then the nonvolatile storage is performed. Reads information data stored in the stage, characterized in that it comprises control means for controlling said recording means to record on the recording medium.

  The present invention also provides a first volatile storage means for temporarily storing information data, a second volatile storage means capable of holding stored data by a backup power source, and a non-volatile storage for storing information data And a recording device for recording information data on a recording medium, the detecting device detecting the remaining amount of the backup power source, and an input according to an instruction to record the information data The information data is temporarily stored in the first volatile storage means, and when the remaining amount of the backup power source is a predetermined amount or more, and a predetermined amount of the information data with respect to the first volatile storage means After storing the information data stored in the first volatile storage unit in the second volatile storage unit in response to the storage of the information data or in response to an instruction to stop recording the information data The first Controlling the recording means to record the information data stored in the volatile storage means on the recording medium, and the first volatile storage means when the remaining amount of the backup power source is less than a predetermined amount The information data stored in the first volatile storage means is stored in the non-volatile storage in response to the storage of a predetermined amount of the information data or in response to an instruction to stop recording the information data. And a control means for controlling the recording means to record the information data stored in the non-volatile storage means on the recording medium.

  The present invention also provides a first volatile storage means for temporarily storing information data, a second volatile storage means capable of holding stored data by a backup power source, and a non-volatile storage for storing information data And a recording device for recording information data on a recording medium, the detecting device detecting the remaining amount of the backup power source, and an input according to an instruction to record the information data The information data is temporarily stored in the first volatile storage means, and when the remaining amount of the backup power source is a predetermined amount or more, and a predetermined amount of the information data with respect to the first volatile storage means Is stored in the second volatile storage means, and then the information stored in the second volatile storage means is stored. The data The recording means is controlled to record on a recording medium, and when the remaining amount of the backup power source is less than a predetermined amount and the predetermined amount of the information data is stored in the volatile storage means Alternatively, when the remaining amount of the backup power source is a predetermined amount or more and in response to an instruction to stop recording the information data, the information data stored in the first volatile storage means is stored in the nonvolatile storage means And a control means for controlling the recording means to record the information data stored in the non-volatile storage means on the recording medium.

  According to the present invention, since data is temporarily recorded in the non-volatile storage means for backup and then recorded on the recording medium, even when the power supply of the recording apparatus is interrupted during data recording on the recording medium, The effect is that data is not lost.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a block diagram showing a configuration of a disc camcorder as a recording apparatus according to a first embodiment of the present invention.

  In FIG. 1, the disk camcorder includes a camera input unit 1, an audio input unit 2, a magneto-optical disk (hereinafter abbreviated as a disk) 9, a CPU 18, a volatile memory 19, a nonvolatile memory 21, and the like. The disc camcorder can record a shot image (moving image or still image), and has a PAUSE control (recording pause control) function.

  The camera input unit 1 includes an imaging lens, a motor that drives the lens, and a CCD that is an imaging element. The camera input unit 1 converts an image signal obtained by photographing a subject into digital data, and performs video / audio data processing. Output to unit 5.

  The audio input unit 2 includes a sound collecting microphone and the like, converts the collected audio signal into digital data, and outputs the digital data to the video / audio data processing unit 5.

  The video / audio data processing unit 5 compresses the video data supplied from the camera input unit 1 by performing DCT (discrete cosine transform) processing, quantization processing, and the like based on a signal compression format such as MPEG. The video data is decompressed based on a format such as MPEG. The video data is encoded and various display information (characters, icons, etc.) is added and then output to the display unit 3.

  The video / audio data processing unit 5 compresses the audio data supplied from the audio input unit 2 based on a format such as MPEG audio, Dolby Digital, or linear PCM. The audio data is encoded and then output to the speaker unit 4. Note that MPEG: Moving Picture Experts Group, DCT: Discrete Cosine Transform, and PCM: Pulse Code Modulation.

  The disk signal processing unit 6 generates a servo system signal for controlling the spindle motor 10 and the optical head 11 based on the tracking error signal supplied from the analog front end 14 and outputs the servo system signal to the motor amplifier 7.

  The analog front end 14 converts the disk recording stream supplied from the disk signal processing unit 6 into an analog signal, performs processing such as amplification, and then outputs it to the optical head 11 and emits laser light from the optical head 11. By controlling, data is written on the disk 9. Further, when the analog front end 14 reads out the data recorded on the disk 9, it amplifies the signal for the reflected light of the laser emitted from the optical head 11, converts it to a digital signal, and then outputs the disk signal as a disk playback stream. Output to the processing unit 6. Further, the analog front end 14 generates a tracking error signal or the like from a signal corresponding to the intensity of reflected light of the laser emitted from the optical head 11, converts it into a digital signal, and outputs it to the disk processing unit 6.

  The motor amplifier 7 generates a spindle control signal, a focus tracking control signal, and a carriage control signal based on the servo system signal supplied from the disk signal processing unit 6 and outputs them to the spindle motor 10 and the optical head 11. Thus, these parts are controlled.

  The spindle motor 10 rotates the disk 9 mounted on the disk camcorder at a predetermined rotational speed based on the spindle control signal supplied from the motor amplifier 7.

  The optical head 11 irradiates a laser at a predetermined position of the disk 9 from the irradiation unit based on the focus tracking control signal supplied from the motor amplifier 7 and the control of the analog front end 14. The optical head 11 receives a laser beam irradiated from the irradiation unit and reflected by the surface of the disk 9, reads a pit of the disk 9, and sends a signal corresponding to the intensity of the reflected light to the analog front end 14. Output.

  The optical system such as the disk signal processing unit 6, the analog front end 14, the optical head 11 and the like, when the disk 9 is mounted on the disk camcorder, is unique to each mounted disk, the servo gain of each servo system of focus, spindle, Calibration work such as laser power optimization is performed.

  The operation unit 12 includes a camera system operation unit, a playback system operation unit, a power mode switch, and the like, and outputs an instruction from the user to the operation control unit 13. The camera system operation unit includes various switches ([ZOOM], [FOCUS], [REC / PAUSE], etc.) related to the operation of the camera system. The playback system operation section has various switches related to the playback system and the entire disc camcorder ([UP], [DOWN], [MENU], [SET], [PLAY], [FF / REW], [STOP], [START / STOP], [EJECT] [CANCEL], etc.). The power mode switch is used to select the power mode of the disc camcorder body (camera mode for shooting, playback mode for playing back captured images, and power off mode for turning off the power).

  The start / stop of the recording of the captured image is performed by operating a recording button or the like of the operation unit 12. When the user operates the operation unit 12, the operation control unit 13 detects the operation. When recording is instructed by the user from the operation unit 12, the disk signal processing unit 6 performs the following processing under the control of the CPU 18. That is, the disc signal processing unit 6 adds management information such as a content number, shooting date / time, shooting conditions, content title, and error correction block to the data supplied from the video / audio data processing unit 5 and an analog front end. 14 for output. The management information is stored in the nonvolatile memory 21 in accordance with the operation of the present embodiment described later.

  The disc detection unit 8 mechanically detects whether or not the disc 9 is mounted on the disc mounting unit (not shown) of the disc camcorder and the state of the disc cover covering the disc 9 in accordance with an instruction from the CPU 18, and sends detection information to the CPU 18. Send.

  The external power input unit 15 is a DC power input unit for supplying power to the disk camcorder from outside. The main battery 16 is a detachable battery that supplies power to the disc camcorder instead of the external power input unit 15.

  The power control unit 17 is connected to the external power input unit 15 and the main battery 16, and according to instructions from the CPU 18, confirms the power supply status and controls the selection of the power supply system, and displays power information on the display unit 3. And control to issue a warning when a decrease in the capacity of the main battery 16 is detected.

  A volatile memory (DRAM) 19 is a volatile memory that temporarily stores recorded data, and is a memory for absorbing shock. Hereinafter, it is referred to as DRAM 19.

  A non-volatile memory (FLASH memory) 21 is a temporary storage memory for backing up data to be recorded on the disk 9. Hereinafter, it is referred to as FLASH memory 21.

  The CPU 18 includes a microcomputer that comprehensively controls various functions, a ROM for storing a control program, a RAM for each processing work, an I / O port, a timer count unit, and the like. The CPU 18 controls the analog front end 14, the disk signal processing unit 6, the video / audio data processing unit 5, the power supply control unit 17, and the disk detection unit 8 based on a signal corresponding to a user instruction supplied from the operation unit 12. Controls the operation of the entire disc camcorder. Further, the CPU 18 executes the processes shown in the flowcharts of FIGS. 2, 3, and 7 based on the control program.

  Next, the operation of the disc camcorder of the present embodiment having the above configuration will be described in detail with reference to FIGS.

  2 and 3 are flowcharts showing the data recording process of the disc camcorder.

  2 and 3, the user presses the recording button of the operation unit 12 in order to start recording of a captured image with a disc camcorder (step S101). Accordingly, when the CPU 18 detects that the recording button is pressed (step S102), the encoded data is stored in the DRAM 19 (step S103). Next, the CPU 18 confirms the presence / absence of PAUSE control (recording pause control) (step S104).

  When the PAUSE control is not performed, that is, when recording is continued (NO in step S104), the CPU 18 accumulates a predetermined amount of data in the DRAM 19 (YES in step S105), and reads the data from the DRAM 19 (step S106). ), Data is recorded on the disk 9 (step S107).

  FIG. 4 shows the data flow of this recording method (black arrow: the same applies to FIG. 5 and subsequent figures). In FIG. 1, no volatile memory other than the DRAM 19 is connected to the CPU 18. However, in FIG. 4, a volatile memory (SDRAM) 20 is connected to the CPU 18 and a backup power source 22 is connected to the volatile memory 20. Shows the case where is connected.

  On the other hand, if the PAUSE control is detected as a result of confirming the presence / absence of the PAUSE control (YES in step S104), the CPU 18 stops writing the data after the frame in which the PAUSE instruction is issued to the DRAM 19 and stores it in the DRAM 19. Regardless of the amount of data thus read, data is read from the DRAM 19 (step S108), and the data is temporarily stored in the FLASH memory 21 (step S109). At this time, the CPU 18 stores a backup flag (ON) indicating that the data has been backed up at a predetermined address in the FLASH memory 21 (step S110).

  Subsequently, the CPU 18 reads the data stored in the FLASH memory 21 (step S111) and records the data on the disk 9 (step S112). When the recording of data on the disk 9 is completed, the CPU 18 erases (OFF) the backup flag stored in the FLASH memory 21 in order to store the completion of the recording of data on the disk 9 (step S113). . Finally, the CPU 18 erases the content stored in the FLASH memory 21 (step S114), and after completing this process (step S115), prepares for the next backup process.

  FIG. 5 shows the data flow of this recording method. FIG. 5 also shows a case where a volatile memory (SDRAM) 20 is connected to the CPU 18 and a backup power source 22 is connected to the volatile memory 20.

  FIG. 6 summarizes the correspondence between the presence / absence of PAUSE control and the data backup destination storage medium according to the present embodiment. As shown in FIG. 6, in the absence of PAUSE control, data backup is not performed, and therefore there is no storage medium regardless of the remaining amount of backup power. On the other hand, in the case of PAUSE control, data backup is performed, so the backup destination is the FLASH memory 21 regardless of the amount of remaining backup power.

  FIG. 7 is a flowchart showing the operation when the disk camcorder is turned on.

  In FIG. 7, when the disk camcorder is activated (step S601), the CPU 18 reads a backup flag stored at a predetermined address in the FLASH memory 21 (step S602). If there is a backup flag (ON) (NO in step S603), this means that the recording of data on the disk 9 has not been completed, so the CPU 18 reads the data from the FLASH memory 21 (step S604), and the disk The data is recorded in 9 (step S605).

  When recording of data on the disk 9 is completed, the CPU 18 erases (OFF) the backup flag stored in the FLASH memory 21 in order to store the completion of recording of data on the disk 9 (step S606). Finally, the CPU 18 erases the contents stored in the FLASH memory 21 (step S607), ends the processing (step S608), and then enters a normal routine as a disc camcorder.

  As described above, according to the present embodiment, data is temporarily stored in the backup FLASH memory 21 and then recorded on the disk 9. As a result, even if the power supply of the disc camcorder is cut off during data recording on the disc 9, the recorded data is not lost.

  When the power of the disk recording apparatus is turned on, the data recording state on the disk 9 is confirmed. If the recording is not completed, the data stored in the backup FLASH memory 21 is recorded on the disk 9. As a result, the recorded data can be recorded on the disc 9 to the end, and the disc can be replayed by finalizing.

  Further, since the storage medium to be backed up is selected by using PAUSE control as a trigger, data can be preferentially backed up to a storage medium with a high processing speed, and the recording processing time to the disk 9 can be shortened.

  Further, by selecting the storage medium by the trigger, it is possible to preferentially select a storage medium with no limit on the number of times of recording, and it is possible to extend the life of the backup function of the disc camcorder.

  Further, as the recording processing time is shortened, the memory capacity of the shock absorbing volatile memory (DRAM 19) and the backup storage medium (FLASH memory 21) can be reduced.

[Second Embodiment]
The second embodiment of the present invention differs from the first embodiment described above in that the disc camcorder has the configuration shown in FIG. 8 and performs the data recording process shown in FIGS. . Since the other elements of the present embodiment are the same as the corresponding ones of the first embodiment (FIG. 1) described above, description thereof is omitted.

  FIG. 8 is a block diagram showing a configuration of a disc camcorder as a recording apparatus according to the present embodiment.

  In FIG. 8, the disc camcorder includes a camera input unit 1, an audio input unit 2, a disc 9, a CPU 18, a DRAM 19, a volatile memory (SDRAM) 20, a FLASH memory 21, a backup power source 22, and the like.

  The volatile memory (SDRAM) 20 is a temporary storage memory for backing up data to be recorded on the disk 9. Hereinafter, it is referred to as SDRAM 20. A backup power supply 22 is connected to the SDRAM 20. The CPU 18 executes the processes shown in the flowcharts of FIGS. 9, 10, and 13 based on the control program.

  9 and 10 are flowcharts showing the data recording process of the disc camcorder.

  9 and 10, the user presses the recording button on the operation unit 12 in order to start recording with the disc camcorder (step S201). Accordingly, when the CPU 18 detects that the recording button is pressed (step S202), the recorded data is stored in the DRAM 19 (step S203). Next, the CPU 18 confirms the presence / absence of PAUSE control (step S204).

  When PAUSE control is not performed, that is, when recording is continued, the CPU 18 accumulates a predetermined amount of data in the DRAM 19 (YES in step S205), reads the data from the DRAM 19 (step S206), and stores the data in the SDRAM 20. Temporary storage is performed (step S207). At this time, the CPU 18 stores a backup flag (ON) indicating that the data has been backed up at a predetermined address in the SDRAM 20 (step S208).

  Subsequently, the CPU 18 reads the data stored in the SDRAM 20 (step S209) and records the data on the disk 9 (step S210). When the recording of data on the disk 9 is completed, the CPU 18 erases (OFF) the backup flag stored in the SDRAM 20 in order to store the completion of the recording of data on the disk 9 (step S211).

  FIG. 11 shows the data flow of this recording method.

  On the other hand, if the PAUSE control is detected as a result of confirming the presence or absence of the PAUSE control (YES in step S204), the CPU 18 stops writing the data after the frame in which the PAUSE instruction is issued to the DRAM 19 and stores the data in the DRAM 19. Regardless of the amount of data thus read, data is read from the DRAM 19 (step S212), and the data is temporarily stored in the FLASH memory 21 (step S213). At this time, the CPU 18 stores a backup flag (ON) indicating that the data has been backed up at a predetermined address in the FLASH memory 21 (step S214).

  Subsequently, the CPU 18 reads the data stored in the FLASH memory 21 (step S215) and records the data on the disk 9 (step S216). When recording of data on the disk 9 is completed, the CPU 18 erases (OFF) the backup flag stored in the FLASH memory 21 in order to store the completion of recording of data on the disk 9 (step S217). Finally, the CPU 18 erases the contents stored in the FLASH memory 21 (step S218), and after completing this process (step S219), prepares for the next backup process.

  FIG. 5 shows the data flow of this recording method.

  FIG. 12 summarizes the correspondence relationship between the presence / absence of PAUSE control and the data backup destination storage medium according to the present embodiment. As shown in FIG. 12, when there is no PAUSE control, the backup destination is the SDRAM 20 regardless of the amount of remaining backup power. On the other hand, in the case of PAUSE control, the backup destination is the FLASH memory 21 regardless of the amount of backup power remaining.

  FIG. 13 is a flowchart showing the operation when the disk camcorder is turned on.

  In FIG. 13, when the disk camcorder is activated (step S701), the CPU 18 reads the backup flag stored at a predetermined address of the SDRAM 20 and the backup flag stored at a predetermined address of the FLASH memory 21 (step S702, step S701). S703). If there is a backup flag (NO in step S704), this means that recording on the disk 9 has not been completed, so the CPU 18 checks the storage medium in which the backup flag exists (step S705). The CPU 18 reads data from the storage medium (SDRAM 20 or FLASH memory 21) in which the backup flag exists (step S706, step S707), and records the data on the disk 9 (step S708).

  When the recording of data on the disk 9 is completed, the CPU 18 erases (OFF) the backup flag stored in the storage medium in which the backup flag is stored in order to store the completion of the recording of data on the disk 9. (Step S709). Finally, the CPU 18 erases the contents stored in the FLASH memory 21 (step S710), ends the processing (step S711), and then enters a normal routine as a disc camcorder.

  As described above, according to the present embodiment, the recorded data is lost even when the power supply of the disc camcorder is cut off during the recording of data on the disc 9, as in the first embodiment. It has the effect of not being broken.

  Further, since the storage medium to be backed up is selected by using PAUSE control as a trigger, data can be preferentially backed up to a storage medium with a high processing speed, and the recording processing time to the disk 9 can be shortened.

  Further, by selecting the storage medium by the trigger, it is possible to preferentially select a storage medium with no limit on the number of times of recording, and it is possible to extend the life of the backup function of the disc camcorder.

  Further, as the recording processing time is shortened, the memory capacity of the impact absorbing volatile memory (DRAM 19) and the backup storage medium (SDRAM 20, FLASH memory 21) can be reduced.

[Third Embodiment]
The third embodiment of the present invention is different from the above-described first embodiment in that the disc camcorder has the configuration shown in FIG. 14 and performs the data recording process shown in FIGS. . Since the other elements of the present embodiment are the same as the corresponding ones of the first embodiment (FIG. 1) described above, description thereof is omitted.

  FIG. 14 is a block diagram showing a configuration of a disc camcorder as a recording apparatus according to the present embodiment.

  In FIG. 14, the disc camcorder includes a camera input unit 1, an audio input unit 2, a disc 9, a CPU 18, a DRAM 19, a SDRAM 20, a FLASH memory 21, a backup power source 22, a backup power source monitoring unit 23, and the like.

  The backup power supply monitoring unit 23 monitors the remaining amount of the backup power supply 22 of the SDRAM 20. The backup power supply monitoring unit 23 is connected to the CPU 18 and is used for determination of backup processing to be described later. Based on the control program, the CPU 18 performs FIGS. 15 and 16 (third embodiment), FIGS. 18 and 19 (fourth embodiment), and FIGS. 21 and 22 (fifth embodiment). The processing shown in each flowchart is executed.

  15 and 16 are flowcharts showing the data recording process of the disc camcorder.

  15 and 16, the user presses the recording button on the operation unit 12 in order to start recording with the disc camcorder (step S301). Accordingly, when the CPU 18 detects that the recording button is pressed (step S302), the recorded data is stored in the DRAM 19 (step S303). Next, the CPU 18 confirms the presence / absence of PAUSE control (step S304).

  When PAUSE control is not performed, that is, when recording is continued, the CPU 18 accumulates a predetermined amount of data in the DRAM 19 (YES in step S305), reads the data from the DRAM 19 (step S306), and stores the data in the SDRAM 20. Temporary storage is performed (step S307). At this time, the CPU 18 stores a backup flag (ON) indicating that the data has been backed up at a predetermined address in the SDRAM 20 (step S308).

  Subsequently, the CPU 18 reads data stored in the SDRAM 20 (step S309) and records the data on the disk 9 (step S310). When recording of data on the disk 9 is completed, the CPU 18 erases (OFF) the backup flag stored in the SDRAM 20 in order to store the completion of recording of data on the disk 9 (step S311).

  FIG. 11 shows the data flow of this recording method.

  On the other hand, if the PAUSE control is detected as a result of checking the presence / absence of the PAUSE control (YES in step S304), the CPU 18 stops writing the data after the frame in which the PAUSE instruction is issued to the DRAM 19 and the backup power source 22 The remaining amount is detected (step S312). When the remaining amount of the backup power source 22 is greater than or equal to the predetermined amount, the CPU 18 reads data from the DRAM 19 regardless of the amount of data stored in the DRAM 19 (step S313), and temporarily stores the data in the SDRAM 20 (step S314). At this time, the CPU 18 stores a backup flag (ON) indicating that the data has been backed up at a predetermined address in the SDRAM 20 (step S315).

  Subsequently, the CPU 18 reads the data stored in the SDRAM 20 (step S316) and records the data on the disk 9 (step S317). When the recording of data on the disk 9 is completed, the CPU 18 erases (OFF) the backup flag stored in the SDRAM 20 in order to store the completion of the recording of data on the disk 9 (step S318).

  FIG. 11 shows the data flow of this recording method.

  On the other hand, when the CPU 18 detects PAUSE control and the remaining amount of the backup power source 22 is less than the predetermined amount (NO in step S312), the CPU 18 reads data from the DRAM 19 regardless of the amount of data stored in the DRAM 19 (step S319). The data is temporarily stored in the FLASH memory 21 (step S320). At this time, the CPU 18 stores a backup flag (ON) indicating that the data has been backed up at a predetermined address in the FLASH memory 21 (step S321).

  Subsequently, the CPU 18 reads the data stored in the FLASH memory 21 (step S322) and records the data on the disk 9 (step S323). When recording of data on the disk 9 is completed, the CPU 18 erases (OFF) the backup flag stored in the FLASH memory 21 in order to store the completion of recording of data on the disk 9 (step S324). Finally, the CPU 18 erases the content stored in the FLASH memory 21 (step S325), and after completing this process (step S326), prepares for the next backup process.

  FIG. 5 shows the data flow of this recording method.

  FIG. 17 summarizes the correspondence relationship between the presence / absence of PAUSE control and the data backup destination storage medium according to the remaining amount of the backup power supply 22 according to the present embodiment. As shown in FIG. 17, in the case of no PAUSE control, the backup destination is the SDRAM 20 when the backup power remaining amount is low, and the backup destination is the FLASH memory 21 when the backup power remaining amount is large. On the other hand, in the case of PAUSE control, the backup destination is the FLASH memory 21 regardless of the remaining amount of backup power.

  Note that the flowchart (FIG. 13) showing the operation of the present embodiment when the disk camcorder is turned on is the same as that of the second embodiment described above, and thus the description thereof is omitted.

  As described above, according to the present embodiment, the recorded data is lost even when the power supply of the disc camcorder is cut off during the recording of data on the disc 9, as in the first embodiment. It has the effect of not being broken.

  In addition, when the backup power supply monitoring unit 23 detects a decrease in the capacity of the backup power supply 22 of the SDRAM 20, data can be preferentially recorded in the FLASH memory 21, and the data can be reliably protected. Play.

  In addition, since the storage medium to be backed up is selected by using the PAUSE control and the remaining power of the backup power source 22 of the SDRAM 20 as a trigger, data can be preferentially backed up to a storage medium with a high processing speed, and recording processing to the disk 9 can be performed. There is an effect that the time can be shortened.

  Further, by selecting the storage medium by the trigger, it is possible to preferentially select a storage medium with no limit on the number of times of recording, and it is possible to extend the life of the backup function of the disc camcorder.

  Further, as the recording processing time is shortened, the memory capacity of the impact absorbing volatile memory (DRAM 19) and the backup storage medium (SDRAM 20, FLASH memory 21) can be reduced.

[Fourth Embodiment]
The fourth embodiment of the present invention is different from the above-described third embodiment in that the disc camcorder performs the data recording process shown in FIGS. The other elements of the present embodiment are the same as the corresponding ones of the third embodiment (FIG. 14) described above, and a description thereof will be omitted.

  18 and 19 are flowcharts showing the data recording process of the disc camcorder according to the present embodiment.

  18 and 19, the user presses the recording button on the operation unit 12 in order to start recording with the disc camcorder (step S401). Accordingly, when the CPU 18 detects that the recording button is pressed (step S402), the recorded data is stored in the DRAM 19 (step S403). Next, the CPU 18 detects the remaining amount of the backup power source 22 (step S404). When the remaining amount of the backup power source 22 is greater than or equal to a predetermined amount, the CPU 18 confirms whether a predetermined amount of data has been accumulated in the DRAM 19 (step S405) or PAUSE control is being performed (step S412).

  When a predetermined amount of data is accumulated in the DRAM 19 or when PAUSE control is performed, the CPU 18 reads data from the DRAM 19 (step S406) and temporarily stores the data in the SDRAM 20 (step S407). At this time, the CPU 18 stores a backup flag (ON) indicating that the data has been backed up at a predetermined address in the SDRAM 20 (step S408).

  Subsequently, the CPU 18 reads the data stored in the SDRAM 20 (step S409) and records the data on the disk 9 (step S410). When the recording of data on the disk 9 is completed, the CPU 18 erases (OFF) the backup flag stored in the SDRAM 20 in order to store the completion of the recording of data on the disk 9 (step S411).

  FIG. 11 shows the data flow of this recording method.

  On the other hand, as a result of detecting the remaining amount of the backup power source 22, if the remaining amount of the backup power source 22 is less than the predetermined amount (NO in step S404), the CPU 18 has stored a predetermined amount of data in the DRAM 19 (step S420). Or PAUSE control is performed (step S421).

  When a predetermined amount of data is accumulated in the DRAM 19 or when PAUSE control is performed, the CPU 18 reads data from the DRAM 19 (step S413), and temporarily stores the data in the FLASH memory 21 (step S414). At this time, the CPU 18 stores a backup flag (ON) indicating that the data has been backed up at a predetermined address in the FLASH memory 21 (step S415).

  Subsequently, the CPU 18 reads the data stored in the FLASH memory 21 (step S416) and records the data on the disk 9 (step S417). When the data recording on the disk 9 is completed, the CPU 18 erases (OFF) the backup flag stored in the FLASH memory 21 in order to store the completion of the data recording on the disk 9 (step S418). Finally, the CPU 18 erases the contents stored in the FLASH memory 21 (step S419), and after completing this process (step S423), prepares for the next backup process.

  FIG. 5 shows the data flow of this recording method.

  FIG. 20 summarizes the correspondence relationship between the presence / absence of PAUSE control and the storage medium to which data is backed up according to the remaining amount of the backup power source 22 according to the present embodiment. As shown in FIG. 20, the backup destination is the FLASH memory 21 when the backup power remaining amount is small, and the backup destination is the SDRAM 20 when the backup power remaining amount is large, regardless of the presence or absence of PAUSE control.

  Note that the flowchart (FIG. 13) showing the operation of the present embodiment when the disk camcorder is turned on is the same as that of the second embodiment described above, and thus the description thereof is omitted.

  As described above, according to the present embodiment, the recorded data is lost even when the power supply of the disc camcorder is cut off during the recording of data on the disc 9, as in the first embodiment. It has the effect of not being broken.

  In addition, when the backup power supply monitoring unit 23 detects a decrease in the capacity of the backup power supply 22 of the SDRAM 20, data can be preferentially recorded in the FLASH memory 21, and the data can be reliably protected. Play.

  In addition, since the storage medium to be backed up is selected by using the PAUSE control and the remaining power of the backup power source 22 of the SDRAM 20 as a trigger, data can be preferentially backed up to a storage medium with a high processing speed, and recording processing to the disk 9 can be performed. There is an effect that the time can be shortened.

  Further, by selecting the storage medium by the trigger, it is possible to preferentially select a storage medium with no limit on the number of times of recording, and it is possible to extend the life of the backup function of the disc camcorder.

  Further, as the recording processing time is shortened, the memory capacity of the impact absorbing volatile memory (DRAM 19) and the backup storage medium (SDRAM 20, FLASH memory 21) can be reduced.

[Fifth Embodiment]
The fifth embodiment of the present invention is different from the above-described third embodiment in that the disc camcorder performs the data recording process shown in FIGS. The other elements of the present embodiment are the same as the corresponding ones of the third embodiment (FIG. 14) described above, and a description thereof will be omitted.

  21 and 22 are flowcharts showing the data recording process of the disc camcorder according to the present embodiment.

  21 and 22, the user presses the recording button on the operation unit 12 in order to start recording with a disc camcorder (step S501). Accordingly, when the CPU 18 detects that the recording button is pressed (step S502), the recorded data is stored in the DRAM 19 (step S503). Next, the CPU 18 detects the remaining amount of the backup power source 22 (step S504), and confirms the presence or absence of PAUSE control (step S505).

  If the remaining amount of the backup power source 22 is equal to or greater than the predetermined amount and PAUSE control is not performed, when a predetermined amount of data is accumulated in the DRAM 19 (YES in step S506), the CPU 18 reads the data from the DRAM 19 (step S507). The data is temporarily stored in the SDRAM 20 (step S508). At this time, the CPU 18 stores a backup flag (ON) indicating that the data has been backed up at a predetermined address in the SDRAM 20 (step S509).

  Subsequently, the CPU 18 reads the data stored in the SDRAM 20 (step S510) and records the data on the disk 9 (step S511). When recording of data on the disk 9 is completed, the CPU 18 erases (OFF) the backup flag stored in the SDRAM 20 in order to store the completion of recording of data on the disk 9 (step S512).

  FIG. 11 shows the data flow of this recording method.

  On the other hand, if the remaining amount of the backup power source 22 is less than the predetermined amount as a result of detecting the remaining amount of the backup power source 22 (NO in step S504), and a predetermined amount of data is accumulated in the DRAM 19 (in step S513) YES), the process from step S514 is performed. Alternatively, if the remaining amount of the backup power source 22 is equal to or greater than the predetermined amount (YES in step S504) and PAUSE control is performed (YES in step S505), the processing in step S514 and subsequent steps is performed.

  The CPU 18 reads data from the DRAM 19 (step S514), and temporarily stores the data in the FLASH memory 21 (step S515). At this time, the CPU 18 stores a backup flag (ON) indicating that the data has been backed up at a predetermined address in the FLASH memory 21 (step S516).

  Subsequently, the CPU 18 reads the data stored in the FLASH memory 21 (step S517) and records the data on the disk 9 (step S518). When the recording of data on the disk 9 is completed, the CPU 18 erases (OFF) the backup flag stored in the FLASH memory 21 in order to store the completion of the recording of data on the disk 9 (step S519). Finally, the CPU 18 erases the contents stored in the FLASH memory 21 (step S520), and after completing this process (step S522), prepares for the next backup process.

  FIG. 5 shows the data flow of this recording method.

  FIG. 23 summarizes the correspondence between the presence / absence of PAUSE control and the storage medium to which data is backed up according to the remaining amount of the backup power supply 22 according to the present embodiment. As shown in FIG. 23, in the case of no PAUSE control, the backup destination is the FLASH memory 21 when the backup power remaining amount is small, and the backup destination is the SDRAM 20 when the backup power remaining amount is large. On the other hand, in the case of PAUSE control, the backup destination is the FLASH memory 21 regardless of the remaining amount of backup power.

  Note that the flowchart (FIG. 13) showing the operation when the disk camcorder is turned on in the present embodiment is the same as that in the second embodiment described above, and a description thereof will be omitted.

  As described above, according to the present embodiment, the recorded data is lost even when the power supply of the disc camcorder is cut off during the recording of data on the disc 9, as in the first embodiment. It has the effect of not being broken.

  In addition, when the backup power supply monitoring unit 23 detects a decrease in the capacity of the backup power supply 22 of the SDRAM 20, data can be preferentially recorded in the FLASH memory 21, and the data can be reliably protected. Play.

  In addition, since the storage medium to be backed up is selected by using the PAUSE control and the remaining power of the backup power source 22 of the SDRAM 20 as a trigger, data can be preferentially backed up to a storage medium with a high processing speed, and recording processing to the disk 9 can be performed. There is an effect that the time can be shortened.

  Further, by selecting the storage medium by the trigger, it is possible to preferentially select a storage medium with no limit on the number of times of recording, and it is possible to extend the life of the backup function of the disc camcorder.

  Further, as the recording processing time is shortened, the memory capacity of the impact absorbing volatile memory (DRAM 19) and the backup storage medium (SDRAM 20, FLASH memory 21) can be reduced.

[Other embodiments]
In the first to fifth embodiments, the case where data is recorded and reproduced with respect to the disk is taken as an example. However, the present invention is not limited to this, and the data is recorded on the disk. The present invention is also applicable when only recording is performed.

  In addition, an object of the present invention is to supply a storage medium storing software program codes for realizing the functions of the embodiments to a system or apparatus, and a computer (or CPU, MPU, etc.) of the system or apparatus as a storage medium. This can also be achieved by reading and executing the stored program code.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code and the storage medium storing the program code constitute the present invention.

  Examples of the storage medium for supplying the program code include a floppy (registered trademark) disk, a hard disk, a magneto-optical disk, a CD-ROM, a CD-R, a CD-RW, a DVD-ROM, a DVDRAM, and a DVD-RW. DVD + RW, magnetic tape, nonvolatile memory card, ROM, etc. can be used. Alternatively, the program code may be downloaded via a network.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (operating system) running on the computer based on the instruction of the program code. A case where part or all of the actual processing is performed and the functions of the above-described embodiments are realized by the processing is also included.

  Further, after the program code read from the storage medium is written into a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. This includes a case where the CPU or the like provided in the board or the function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are realized by the processing.

  Further, by executing the program code read out by the computer, not only the functions of the above-described embodiments are realized, but also the OS running on the computer based on the instruction of the program code is actually Needless to say, the present invention also includes a case in which the functions of the above-described embodiments are realized by performing part or all of the processing and the processing.

  In this case, the program is supplied by downloading directly from a storage medium storing the program or from another computer or database (not shown) connected to the Internet, a commercial network, a local area network, or the like.

  The form of the program may be in the form of object code, program code executed by an interpreter, script data supplied to an OS (operating system), and the like.

1 is a block diagram showing a configuration of a disc camcorder as a recording apparatus according to a first embodiment of the present invention. It is a flowchart which shows the data recording process of a disc camcorder. It is a continuation of the flowchart of FIG. It is a block diagram which shows the flow of data. It is a block diagram which shows the flow of data. It is a figure which shows the correspondence of the presence or absence of PAUSE control and the storage medium of the backup destination of the data by the backup power remaining amount. It is a flowchart which shows operation | movement when the power supply of a disc camcorder is turned on. It is a block diagram which shows the structure of the disc camcorder as a recording device based on the 2nd Embodiment of this invention. It is a flowchart which shows the data recording process of a disc camcorder. FIG. 10 is a continuation of the flowchart of FIG. 9. It is a block diagram which shows the flow of data. It is a figure which shows the correspondence of the presence or absence of PAUSE control and the storage medium of the backup destination of the data by the backup power remaining amount. It is a flowchart which shows operation | movement when the power supply of a disc camcorder is turned on. It is a block diagram which shows the structure of the disc camcorder as a recording device based on the 3rd Embodiment of this invention. It is a flowchart which shows the data recording process of a disc camcorder. It is a continuation of the flowchart of FIG. It is a figure which shows the correspondence of the presence or absence of PAUSE control and the storage medium of the backup destination of the data by the backup power remaining amount. It is a flowchart which shows the data recording process of the disc camcorder as a recording device based on the 4th Embodiment of this invention. It is a continuation of the flowchart of FIG. It is a figure which shows the correspondence of the presence or absence of PAUSE control and the storage medium of the backup destination of the data by the backup power remaining amount. It is a flowchart which shows the data recording process of the disc camcorder as a recording device based on the 5th Embodiment of this invention. It is a continuation of the flowchart of FIG. It is a figure which shows the correspondence of the presence or absence of PAUSE control and the storage medium of the backup destination of the data by the backup power remaining amount.

Explanation of symbols

9 Magneto-optical disk (recording medium) 18 CPU (control means)
19 Volatile memory (DRAM) (volatile storage means, first volatile storage means)
20 volatile memory (SDRAM) (second volatile storage means)
21 Nonvolatile memory (FLASH memory) (nonvolatile storage means)
22 Backup power supply 23 Backup power supply monitoring unit (detection means)

Claims (10)

A recording apparatus comprising: volatile storage means for temporarily storing information data; nonvolatile storage means for storing information data; and recording means for recording information data on a recording medium,
In response to an instruction to record the information data, the input information data is temporarily stored in the volatile storage means, and a predetermined amount of the information data is stored in the volatile storage means , Controlling the recording means to read the information data stored in the volatile storage means and record it on the recording medium,
In response to an instruction to stop recording the information data, the storage of the input information data in the volatile storage unit is stopped, and the information data stored in the volatile storage unit is read to read the nonvolatile storage unit A recording apparatus comprising: control means for controlling the recording means so that the information data stored in the non-volatile storage means is read and recorded on the recording medium.   The control means detects whether or not the recording of the information data stored in the nonvolatile storage means has been completed when the recording device is turned on. 2. A recording apparatus according to claim 1, wherein said recording means is controlled to read out unrecorded information data stored in said storage means and record it on said recording medium. A first volatile storage means for temporarily storing information data; a second volatile storage means capable of holding the stored contents by a backup power supply; a non-volatile storage means for storing information data; A recording apparatus comprising recording means for recording on a recording medium,
In response to an instruction to record the information data, the input information data is temporarily stored in the first volatile storage means, and a predetermined amount of the information data is stored in the first volatile storage means. In response, the information data stored in the first volatile storage means is read out and stored in the second volatile storage means, and then the information stored in the second volatile storage means Controlling the recording means to read and record data on the recording medium;
In response to an instruction to stop recording the information data, the storage of the input information data in the first volatile storage unit is stopped and the information data stored in the first volatile storage unit is read out. And a control unit that controls the recording unit so that the information data stored in the non-volatile storage unit is read and recorded on the recording medium. First volatile storage means for temporarily storing information data, second volatile storage means capable of holding stored data by a backup power source, non-volatile storage means for storing information data, and information data A recording apparatus comprising recording means for recording on a recording medium,
Detecting means for detecting the remaining amount of the backup power supply;
In response to an instruction to record the information data, the input information data is temporarily stored in the first volatile storage means, and a predetermined amount of the information data is stored in the first volatile storage means. In response, the information data stored in the first volatile storage means is read out and stored in the second volatile storage means, and then the information stored in the second volatile storage means Controlling the recording means to read and record data on the recording medium;
When the remaining amount of the backup power supply is greater than or equal to a predetermined amount in response to an instruction to stop recording the information data, the storage of the input information data in the first volatile storage unit is stopped and the first After reading the information data stored in one volatile storage means and storing it in the second volatile storage means, the information data stored in the second volatile storage means is read and recorded on the recording medium And controlling the recording means to
When the remaining amount of the backup power supply is less than a predetermined amount in response to the instruction to stop recording the information data, the storage of the input information data in the first volatile storage unit is stopped and the first The recording means is configured to read information data stored in one volatile storage means and store the information data in the nonvolatile storage means, and then read the information data stored in the nonvolatile storage means and record the information data on the recording medium. A recording apparatus comprising control means for controlling. First volatile storage means for temporarily storing information data, second volatile storage means capable of holding stored data by a backup power source, non-volatile storage means for storing information data, and information data A recording apparatus comprising recording means for recording on a recording medium,
Detecting means for detecting the remaining amount of the backup power supply;
In response to an instruction to record the information data, the input information data is temporarily stored in the first volatile storage means, and the first power source for backup is more than a predetermined amount and the first data The information data stored in the first volatile storage means in response to a predetermined amount of the information data being stored in the volatile storage means or in response to an instruction to stop recording the information data Is stored in the second volatile storage means, and then the recording means is controlled to record the information data stored in the second volatile storage means on the recording medium,
When the remaining amount of the backup power source is less than a predetermined amount and when a predetermined amount of the information data is stored in the first volatile storage means, or an instruction to stop recording the information data In response, the information data stored in the first volatile storage means is stored in the nonvolatile storage means, and then the information data stored in the nonvolatile storage means is recorded on the recording medium. A recording apparatus comprising control means for controlling the means. First volatile storage means for temporarily storing information data, second volatile storage means capable of holding stored data by a backup power source, non-volatile storage means for storing information data, and information data A recording apparatus comprising recording means for recording on a recording medium,
Detecting means for detecting the remaining amount of the backup power supply;
In response to an instruction to record the information data, the input information data is temporarily stored in the first volatile storage means, and the first power source for backup is more than a predetermined amount and the first data In response to the predetermined amount of the information data being stored in the volatile storage means, the information data stored in the first volatile storage means is stored in the second volatile storage means, Controlling the recording means to record the information data stored in the second volatile storage means on the recording medium;
When the remaining amount of the backup power source is less than a predetermined amount and when the predetermined amount of the information data is stored in the volatile storage unit, or the remaining amount of the backup power source is equal to or larger than the predetermined amount And in response to an instruction to stop recording the information data, the information data stored in the first volatile storage means is stored in the nonvolatile storage means and then stored in the nonvolatile storage means. A recording apparatus comprising: control means for controlling the recording means to record information data on the recording medium.   The control means detects whether or not recording of the information data stored in the second volatile storage means or the nonvolatile storage means has been completed when the recording apparatus is turned on, When recording has not been completed, the recording means is controlled so as to read unrecorded information data stored in the second volatile storage means or the nonvolatile storage means and record it on the recording medium. The recording apparatus according to claim 3.   The recording apparatus according to claim 1, wherein the recording medium includes a disk-shaped recording medium that records captured image data. A control method for a recording apparatus comprising: volatile storage means for temporarily storing information data; nonvolatile storage means for storing information data; and recording means for recording information data on a recording medium,
In response to an instruction to record the information data, the input information data is temporarily stored in the volatile storage means, and a predetermined amount of the information data is stored in the volatile storage means , Controlling the recording means to read the information data stored in the volatile storage means and record it on the recording medium,
In response to an instruction to stop recording the information data, the storage of the input information data in the volatile storage unit is stopped, and the information data stored in the volatile storage unit is read to read the nonvolatile storage unit A control method for controlling the recording means so as to read the information data stored in the nonvolatile storage means and record it on the recording medium. A program for causing a computer to execute a control method of a recording apparatus including a volatile storage unit that temporarily stores information data, a nonvolatile storage unit that stores information data, and a recording unit that records information data on a recording medium Because
In response to an instruction to record the information data, the input information data is temporarily stored in the volatile storage means, and a predetermined amount of the information data is stored in the volatile storage means , Controlling the recording means to read the information data stored in the volatile storage means and record it on the recording medium,
In response to an instruction to stop recording the information data, the storage of the input information data in the volatile storage unit is stopped, and the information data stored in the volatile storage unit is read to read the nonvolatile storage unit And a module for controlling the recording means to read the information data stored in the nonvolatile storage means and record the information data in the recording medium.

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