JP2007012185A - Recording and reproducing device and its control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten identification time of a recording medium and preparation time till reproduction and recording further. <P>SOLUTION: A CPU unit 304 identifies a set control operation mode, and a DVD disk drive control circuit 310 switches and executes the identification processing of a disk medium 311 to be the recording or reproducing object of data in accordance with the identified result. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a recording / reproducing apparatus capable of recording and reproducing data on a recording medium such as a DVD-R and a DVD-RW, and a control method thereof.

  2. Description of the Related Art Conventionally, a video camera that takes a moving image and records it on a magnetic tape is known. In recent years, disk video cameras that record and reproduce moving image data on a DVD, which is an optical disk medium, have appeared in place of magnetic tape.

  Unlike magnetic tape, there are various types of DVDs. Currently, there are video cameras that use a write-once disc DVD-R, a rewritable DVD-RW, and a DVD-RAM. In the future, it may be possible to use DVD + R, DVD + RW, and the like.

  These DVD discs have different recording data formats. Therefore, in such a disc video camera capable of recording image data on various types of DVD discs, the type of disc that is currently installed is identified when the disc is installed or the power is turned on. It is necessary to record image data in a format according to the disc. The type of DVD disc can be recognized by reproducing the information recorded on the disc, but preparation operations and preparation processes are also required before data can be stably reproduced from the disc.

  Furthermore, since the optimum laser power value for recording data differs depending on the individual difference for each disk, laser power adjustment processing is also performed when the disk is mounted or when the power is turned on. Specifically, while adjusting the control parameters for laser power adjustment, trial writing the adjustment data on the disk and then reading it to check the state of the reproduced data is repeated to learn the optimum laser power .

  As described above, a time of about several tens of seconds is currently required for the recognition process and the laser power adjustment process associated with the disk mounting. While waiting for recognition, the user cannot perform recording or playback. Therefore, a configuration for reducing the time for recognition processing and laser adjustment has been proposed (see, for example, Patent Document 1).

JP 2003-178445 A

  According to the invention disclosed in Patent Document 1, the disc recognition time can be shortened, but there is room for further time reduction considering the video camera application.

  Accordingly, an object of the present invention is to further reduce the recording medium identification time and the preparation time until reproduction or recording.

The recording / reproducing apparatus of the present invention comprises a recording / reproducing means for recording / reproducing information data on a recording medium, a recording mode for recording information data on the recording medium, and a reproduction mode for reproducing information data from the recording medium. Mode selection means for selecting one of the above, an identification means for identifying the type of the recording medium, and setting the state of the apparatus to a state suitable for recording or reproduction of the information data, and setting by the mode selection means Control means for changing a processing procedure by the identification means in accordance with the set mode.
The recording / reproducing apparatus control method of the present invention is a recording / reproducing apparatus control method for recording / reproducing information data on / from a recording medium, the recording mode for recording information data on / from the recording medium, and the recording medium According to the mode selection step for selecting one of the reproduction modes for reproducing the information data, and the mode set by the mode setting step, the type of the recording medium is identified, and the state of the apparatus is set to the information data And a control step for changing the processing procedure by the identification means for setting the state suitable for recording or reproduction of the recording medium.
The program of the present invention causes a computer to execute the control method of the recording / reproducing apparatus.
The computer-readable recording medium of the present invention is characterized in that the program is recorded.

  According to the present invention, since the processing procedure of the recording medium identification processing is switched according to any one of the information data recording mode and the information data reproduction mode, for example, the control operation mode is set. Correspondingly, it is possible to execute necessary and sufficient recording medium identification processing, and it is possible to shorten the recording medium identification time and the preparation time until reproduction and recording.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments to which the invention is applied will be described in detail with reference to the accompanying drawings.

-First embodiment-
First, a first embodiment of the present invention will be described. FIG. 3 is a block diagram showing the configuration of the DVD video camera according to the embodiment of the present invention. Reference numeral 301 denotes a camera unit including a lens, 302 denotes an LCD monitor that displays captured images and reproduced images, and device information, 303 denotes a codec unit that performs image compression / decompression processing for recording and reproducing images, and 304 denotes a CPU for system control Reference numeral 305 denotes an operation key circuit; 306 and 309, an ATAPI communication circuit; 307, a recording image data flow; 308, a control data flow for exchanging commands and status information by communicating with the control circuit of the drive unit unit 313; The information content of the control data includes power mode information indicating whether the camera mode is mainly for photographing or the PB mode mainly for reproduction. Reference numeral 310 denotes a DVD disk drive mechanism and its control circuit (hereinafter referred to as a DVD disk drive control circuit), and 311 denotes a DVD medium to be used. The DVD disk drive control circuit 310 records and reproduces data by irradiating a laser beam onto the disk 311 by a pickup unit (not shown). Reference numeral 312 denotes a back end unit including a codec unit 303 that compresses and decompresses image and audio information for the drive unit 313 and a CPU unit 304 that controls the entire system. Reference numeral 314 denotes parallel communication corresponding to the ATAPI interface standard for communicating image information and control data between the back-end unit 312 and the drive unit 313.

  FIG. 2 is a diagram showing a main power dial switch equipped in the DVD video camera according to the present embodiment. 201 is a main dial, 202 is a camera mode setting position, 203 is a main power OFF setting position, and 204 is a playback (PB) mode setting position.

  The user operates this main power dial switch to determine whether to select a camera mode from the power-off state and execute a shooting-related function, or to select a PB mode and execute an image playback-related function. To do. The functions that can be executed in the camera mode and the functions that can be executed in the PB mode are the same as those of a camcorder using a general tape medium. Although description of other details is omitted, there are various types of media as a feature of using the disk media, and there is a feature that there is a media that supports only reproduction. In this embodiment, DVD-R and DVD-RW shooting and playback are supported, and the DVD-RAM media is equipped with a function that supports playback only.

  FIG. 1 is a flowchart showing the operation of a DVD video camera according to an embodiment of the present invention. Step S100 shows a state where the main power supply is OFF (203 in FIG. 2) and the media is newly installed in the drive. Step S101 means an operation in which the user operates the main power switch in order to use the DVD video camera. Step S102 means that the main power switch 201 operates in the camera mode (202 in FIG. 2) and the PB mode (204 in FIG. 2). ) Is a power mode determination process by recognizing an operation key position to detect which one is set.

  If the CPU unit 304 determines that the camera mode is currently set in the power mode determination process in step S102, the CPU unit 304 shifts the process to step S103. In step S103, system startup processing in camera mode is performed, setting parameters for shooting or recording conditions are read from the backup memory, predetermined register settings are performed so that the operation is performed as set, and camera information is set as setting mode identification information. Information indicating that the mode has been set and item information for media recognition processing required in the camera mode are transmitted to the drive unit unit 313.

  In the subsequent step S104, the DVD disk drive control circuit 310 performs a camera mode-dedicated media recognition process based on the setting mode identification information received from the back-end unit unit 312. In the present embodiment, media authentication processing for recording and playback of DVD-R and DVD-RW is performed as media recognition processing dedicated to the camera mode. In step S105, the DVD disk drive control circuit 310 reads the file system information and content management information of the medium for recording the photographed image, and executes a mount process that expands in the RAM.

  In step S106, the CPU unit 304 executes setup processing including setting of the camera unit 301 in the camera mode, lens control such as AF / AE, generation of information to be displayed on the LCD monitor 302 of the captured image, display control, and the like. To do. Step S107 is a shooting standby state after the setup process is completed, and shows a state waiting for a user's shooting operation.

  On the other hand, if it is determined by the power mode determination process in step S102 that the PB mode is currently set, the process proceeds from step S102 to step S108. In step S108, the CPU unit 304 performs system startup processing in the PB mode, reads out the setting parameters for the reproduction operation from the backup memory, performs predetermined register settings so as to operate as set, and sets the setting mode. Information indicating that the PB mode has been set as identification information and item information for media recognition processing required in the PB mode are transmitted to the drive unit unit 313.

  In the subsequent step S109, the DVD disk drive control circuit 310 performs a media recognition process for the PB mode based on the setting mode identification information received from the back-end unit 312. In the present embodiment, media authentication processing necessary for playback of DVD-R, DVD-RW, and DVD-RAM is executed as media authentication processing dedicated to the PB mode. In step S110, the DVD disk drive control circuit 310 reads the file system information and content management information of the medium to be played back, and performs a mounting process that expands it in the RAM.

  In step S111, the CPU unit 304 performs a setup process including setting in the PB mode, generation of information to be displayed on the LCD monitor 302 for reproduction display, display control, and the like. Step S112 means a so-called thumbnail screen display state in which a plurality of thumbnail images after completion of the setup process are displayed on a single screen in units of clips. It shows a state waiting for a playback execution operation to start.

  In the conventional media recognition process, a common media recognition process flow is executed in the camera mode and the PB mode regardless of the result of the power mode determination process by the main power switch in step S102. For this reason, there is a dead time for recognizing media with expanded playback compatibility (only compatible with playback of DVD-RAM media, etc.) even in camera mode, and learning for recording operations that are unnecessary in PB mode. There was a waste of time due to the processing being executed.

  On the other hand, in the present embodiment, as shown in FIG. 1, after the power mode discrimination process, the items of the media recognition process necessary for the function to be executed in each power mode are activated in step S103 and step S108. Set in each process, instruct the control circuit to execute media recognition processing dedicated to each power mode, and as a result, execute a dedicated flow that performs only necessary and sufficient media recognition depending on the operation of the device that can be executed in each mode By making it possible, the optimum recognition for each power supply mode can be completed in a necessary and sufficient time. A known method can be used as a specific disc type discrimination method.

  A feature of the present embodiment over the conventional system is that setting mode identification information is included in communication information between the back-end unit unit 312 and the drive unit unit 313 by the ATAPI interface. With this setting mode identification information, a plurality of media recognition processing contents can be selected on the drive unit unit 313 side exclusively in the camera mode and the PB mode on the drive unit unit 313 side. As described above, in the present embodiment, in the camera mode, media recognition processing for recording and reproduction for DVD-R and DVD-RW, including laser power learning processing, is performed. In the PB mode, media recognition processing necessary for reproduction of DVD-R, DV-RW, and DVD-RAM is executed, and execution of learning processing for recording such as adjustment of laser beam power is prohibited.

  As described above, a plurality of power supply modes are provided, and information corresponding to the power supply modes is transferred to the drive unit unit 313 via communication, so that necessary and sufficient media recognition processing corresponding to the product functions that can be executed in each power supply mode is possible. Thus, the setup operation can be completed in a short time.

-Second Embodiment-
Next, a second embodiment of the present invention will be described. In the first embodiment described above, each predetermined media recognition flow is executed as recording-recognized media recognition and playback-compatible media recognition corresponding to both the power modes of the camera mode and the PB mode, respectively. Furthermore, it is also possible to execute each media recognition flow in consideration of various setting parameter information used in the function operation in the dual power supply mode.

  In the camera mode, the image compression method of the MPEG2 method is used in the codec unit as the image quality setting of the image to be shot. The required media writing speed depends on the data rate setting state of the recording data at this time. Especially when HD-TV compatibility is included, x2 speed media may be insufficient in terms of recording rate, and media that can be recorded at x4 times speed is required. In addition to mounting, a learning operation for recording control as a x4 speed medium is also required.

  As the processing flow of media recognition, a longer detection time is required due to an increase in detection and learning processing for dealing with both x2 and x4. For this reason, in the second embodiment of the present invention, not only the power mode, but also the recording rate setting information of the medium can be checked by the recording rate setting, and the type of media that can be handled by the type of video recording logical format It is also possible to apply a finer classification to the recognition processing by reflecting the type of physical standard in the recognition processing flow.

  Another object of the present invention is to supply a storage medium storing software program codes for realizing the functions of the above-described embodiments to a system or apparatus, and the computer (or CPU or MPU) of the system or apparatus stores the storage medium. Needless to say, this can also be achieved by reading and executing the program code stored in.

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

  As a storage medium for supplying the program code, for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

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

  Further, after the program code read from the storage medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function is determined based on the instruction of the program code. It goes without saying that the CPU or the like provided in the expansion board or function expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing.

It is a flowchart which shows operation | movement of the DVD video camera which concerns on embodiment of this invention. It is a figure which shows the main power dial switch with which the DVD video camera which concerns on this embodiment was equipped. It is a block diagram which shows the structure of the DVD video camera which concerns on embodiment of this invention.

Explanation of symbols

201 Main dial 202 Camera mode setting position 203 Main power OFF setting position 204 PB mode setting position 301 Camera unit 302 LCD monitor 303 Codec unit 304 CPU unit 305 Operation key circuit 306, 309 ATAPI communication circuit 307 Flow of recorded image data 308 Flow of control data 310 DVD disk drive control circuit 311 Disk media 312 Back end unit 313 Drive unit 314 Parallel communication corresponding to ATAPI interface standard

Claims (7)

Recording / reproducing means for recording / reproducing information data to / from the recording medium;
Mode selection means for selecting one of a recording mode for recording information data on the recording medium and a reproduction mode for reproducing information data from the recording medium;
Identifying means for identifying the type of the recording medium and setting the state of the apparatus to a state suitable for recording or reproduction of the information data;
A recording / reproducing apparatus comprising: control means for changing a processing procedure by the identification means in accordance with a mode set by the mode selection means.   The recording medium includes an optical disk medium, the recording / reproducing means records and reproduces the information data by irradiating the optical disk medium with a laser beam, and the control means, when the recording mode is set The recording / reproducing apparatus according to claim 1, wherein a power adjustment process of the laser beam by the identification unit is executed, and the power adjustment process is prohibited when the reproduction mode is set.   The recording / reproducing apparatus according to claim 1, wherein the information data includes moving image data, and includes an imaging unit that outputs the moving image data.   2. The recording / reproducing apparatus according to claim 1, wherein the control unit further changes a processing procedure by the identification unit in accordance with a recording data rate of the information data. A method for controlling a recording / reproducing apparatus for recording / reproducing information data on a recording medium,
A mode selection step of selecting one of a recording mode for recording information data on the recording medium and a reproduction mode for reproducing information data from the recording medium;
Control for changing the processing procedure by the identification means for identifying the type of the recording medium and setting the state of the apparatus to a state suitable for recording or reproduction of the information data according to the mode set by the mode setting step A control method for the recording / reproducing apparatus.   A program for causing a computer to execute the control method of the recording / reproducing apparatus according to claim 5.   A computer-readable recording medium on which the program according to claim 6 is recorded.

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