JP2007174291A - Image reproducing device and control method therefor, and control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image reproducing device capable of efficiently recording image data when recording only image data in an optional image format in a recording medium of an external device from data in a recording medium with data of a plurality of image formats recorded thereon. <P>SOLUTION: The image reproducing device is provided with a user set switch 109 for setting the type of an image format of reproduced data to be recorded on a magnetic tape of a recording side device 20. A control part 107 detects switching timing of each image format during playback operation of a magnetic tape 101. The control part issues a control command for starting recording or stopping recording the reproduced data to the recording side device 20 in accordance with set information of the user set switch 109 and detection information of the timing detection. The recording side device 20 starts or stops recording the magnetic tape according to the control command. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image reproduction apparatus such as a digital video camera, a control method thereof, and a control program for executing the control method.

  2. Description of the Related Art Conventionally, digital video cameras are defined so that data of a plurality of image formats can be recorded / reproduced on a magnetic tape. Examples of the image format include a DV (Digital Video) format based on an SD (Standard Definition) system that is a standard compression mode, a DV format based on an SDL (Standard Definition High Compression) system that is a high compression mode, and the like. There has also been proposed a system for recording high-definition HD (Moving Picture Expert Group) format video on the same magnetic tape (see Patent Document 1).

  Next, a configuration example of an image reproducing apparatus that reproduces a magnetic tape on which stream (synchronous transmission) data including a plurality of image formats as described above is recorded and outputs the data from a digital interface will be described.

  FIG. 9 is a block diagram showing a configuration of a conventional image reproduction apparatus.

  The cassette tape 601 is played back by the servo unit 602, and a playback signal obtained by the magnetic head 608 is input to the image processing unit 603 and becomes playback data. The image processing unit 603 decodes the reproduction data into data for display on the display unit 604 and sends the decoded data to the display unit 604. In this way, the reproduction data is displayed on the display unit 604. The reproduction data is input to, for example, an IEEE 1394 digital interface 605 to become synchronous transmission data, and is sent to the cable 606. And in order to perform such operation | movement, the control part 607 is controlling each said part.

  Next, when the image reproducing apparatus 600 having the above-described configuration is used, only data of an arbitrary image format is dubbed from a magnetic tape on which stream data including a plurality of image formats is recorded onto another magnetic tape. The operation will be described with reference to FIG.

  FIG. 10 is an explanatory diagram for explaining a dubbing operation of a conventional image reproduction apparatus.

  Reference numeral 801 in the drawing represents the state of data recorded on the magnetic tape in the reproduction-side apparatus (image reproduction apparatus 600 in FIG. 9). First, at the change point 802, the image format is switched from the DV format to the MPEG format, and at the next change point 803, the image format is switched from the MPEG format to the DV format. At a subsequent change point 804, the image format is switched from the DV format to the MPEG format.

  Here, a case where only MPEG format data is dubbed and recorded will be described.

  The operator performs a recording start and recording stop operation on the recording side apparatus (image recording apparatus 700 in FIG. 9) according to the data reproduced on the reproduction side apparatus. Specifically, when the reproduction data change point 802 arrives at the reproduction side device and the reproduction of the MPEG format starts, the operator starts the reproduction data recording operation at the recording side device (806). When the magnetic tape of the reproducing apparatus comes to the DV format switching portion (change point 803), the recording operation of the reproducing data is stopped in the recording apparatus (807). When the magnetic tape of the reproducing apparatus comes again to the MPEG format switching portion (change point 804), the recording apparatus starts the reproduction data recording operation (808). The data switching portion is confirmed by, for example, information displayed on the display unit 604 of the playback apparatus.

  By such an operation, the magnetic tape 805 dubbed by collecting only reproduction data in the MPEG format is created. However, the dubbing operation with the above configuration has a problem that a complicated operation by the operator is required.

  On the other hand, some image reproducing apparatuses that reproduce magnetic tapes with mixed image formats have a function that can be set to output only data in an arbitrary image format selected by the operator. . By using this function, it is also possible to record only the data of the selected image format in the recording apparatus without performing the recording start / stop operation by the operator. For example, it is possible to set so that only data in the MPEG format is output from the interface 605 during reproduction. Hereinafter, the dubbing operation of the image reproducing apparatus set as described above will be described with reference to FIG.

  FIG. 11 is an explanatory diagram for explaining a dubbing operation of another conventional image reproducing apparatus.

  In the figure, reference numeral 901 represents the state of image data recorded on the magnetic tape, and reference numeral 906 represents an image of packet data output from the IEEE 1394 cable 106. In other words, reference numerals 901 and 906 indicate the relationship between the image data on the magnetic tape and the transmission packet data.

  As indicated by reference numeral 901 in the figure, DV format images are recorded in the portions 902 and 904 on the magnetic tape, and MPEG format images are recorded in the portions 903 and 905. In addition, as indicated by reference numeral 906 in the figure, DV format image data 902 is transmitted as a dataless packet sequence (907). When the recorded data changes from the DV format to the MPEG format at the position 911 on the magnetic tape, the packet data output from the cable 106 also changes from the time 912 to the packet sequence of the MPEG format data. Similarly, DV format data of the magnetic tape portion 904 is transmitted in the no-data packet sequence 909, and MPEG format data of the magnetic tape portion 905 is transmitted in the packet sequence 910.

In the recording apparatus, the data transmitted in this way is continuously recorded as it is. 913 in FIG. 11 shows the state of the recorded magnetic tape, and the portions 914 and 915 in the figure are blank portions where no image data is recorded.
JP 2001-275076 A

  As described above, in the configuration of the above prior art, when only the image data of an arbitrary image format is collected and recorded on the magnetic tape of the recording apparatus from the stream data in which the image formats are mixed, it is complicated for the operator. There is a problem that an operation is required or a useless blank is generated on the magnetic tape of the recording apparatus.

  In view of the above-described conventional problems, the present invention is effective when only image data of an arbitrary image format is recorded on a recording medium of an external device from data in a recording medium on which data of a plurality of image formats are recorded. An object of the present invention is to provide an image reproducing apparatus capable of recording image data, a control method thereof, and a control program.

  In order to achieve the above-mentioned object, the present invention provides a reproducing means for generating reproduction data by performing a reproducing operation of a recording medium on which data of a plurality of image formats are recorded, and for recording the reproduction data on a recording medium of an external device. In the image reproducing apparatus having the control means, the control means detects the switching timing of each image format during the reproduction operation of the recording medium, and the detection means according to the detection information of the timing detection means. Command issuing means for issuing a control command for recording start or recording stop of the reproduction data to an external device is provided.

  The present invention also includes a reproducing means for generating a reproduction data by performing a reproduction operation of a recording medium on which data of a plurality of image formats are recorded, and a process for recording the reproduction data on a recording medium of an external device. A control method for an image reproducing device to be performed, wherein a timing detection step of detecting a switching timing of each image format during a reproducing operation of the recording medium, and to the external device according to detection information of the timing detection step And a command issuing step of issuing a control command for recording start or recording stop of the reproduction data.

  The present invention also includes a reproducing means for generating a reproduction data by performing a reproduction operation of a recording medium on which data of a plurality of image formats are recorded, and a process for recording the reproduction data on a recording medium of an external device. A computer-readable control program for executing a control method of an image playback device to be performed, the timing detection step for detecting a switching timing of each image format during the playback operation of the recording medium, and the timing detection And a command issuing step for issuing a control command for recording start or recording stop of the reproduction data to the external device in accordance with step detection information.

  According to the present invention, when only image data of an arbitrary image format is recorded on a recording medium of an external device from data in a recording medium on which data of a plurality of image formats are recorded, the image data is efficiently recorded. It becomes possible. In particular, it is possible to record reproduction data continuously without waste on a recording medium on the external device side without requiring complicated operations by the operator.

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

<Configuration of the present embodiment>
FIG. 1 is a block diagram showing a schematic configuration of an image reproduction apparatus according to an embodiment of the present invention.

  The image reproduction apparatus 10 includes a servo unit 102, an image processing unit 103, a display unit 104, an IEEE1394 digital interface 105, a control unit 107, and a user setting switch 109. The servo unit 102 includes a running system of a cassette magnetic recording tape (hereinafter simply referred to as a magnetic tape) 101 and a rotational driving system of a rotary drum provided with a magnetic head 108.

  The image processing unit 103 has a function of performing predetermined image processing on the reproduction signal obtained by the magnetic head 108 to generate reproduction data and display data, and the display unit 104 has a function of displaying reproduction data and the like. . The digital interface 105 is connected to the external image recording apparatus 20 via the cable 106. The user setting switch 109 is a switch used for a characteristic operation of the present embodiment to be described later, and the operator can set a recording mode for the image recording apparatus 20 by the user setting switch 109. The control unit 107 has a function of controlling the operation of each unit of the image reproduction apparatus 10 and setting an image format output from the digital interface 105 by a setting signal from the user setting switch 109. Further, the control unit 107 performs an operation characteristic of the present embodiment (the processes in FIGS. 3 to 5 described later).

  The magnetic tape 101 is reproduced by the servo unit 102, and the reproduction signal obtained by the magnetic head 108 is input to the image processing unit 103 and becomes reproduction data. The reproduction data is decoded into data to be displayed on the display unit 104 in the image processing unit 103, and is sent to the display unit 104 and displayed. Further, the reproduction data is input to the digital interface 105, where it becomes synchronous transmission data and is sent to the cable 106.

  FIG. 2 is an external view showing an example of the user setting switch 109 in FIG.

  The user setting switch 109 in the example shown in the figure has three positions, and if the slide piece 201 is set to the point 202 side, it is set to a mode (DV format recording mode) for dubbing DV format image data. . If the point 203 is set, the mode is set to dubbing MPEG format data (MPEG format recording mode). Further, when set at a point 204 between both points 202 and 203, a mode for dubbing image data of both formats (all format recording mode) is set.

<Operation of the present embodiment>
Hereinafter, the operations (A), (B), and (C) of the present embodiment will be described with reference to FIGS.

  3, 4 and 5 are flowcharts showing the operation of the image reproducing apparatus according to the present embodiment. FIG. 3 shows the operation in the MPEG format recording mode, and FIG. 4 shows the operation in the DV format recording mode. FIG. 5 shows the operation in the all format recording mode.

(A) MPEG Format Recording Mode FIGS. 6A and 6B are diagrams showing the data recording state of the magnetic tape 101 for explaining the operation in the MPEG format recording mode.

  301 in the figure represents data recorded on the magnetic tape 101 to be reproduced. DV format image data is recorded on the portions 302 and 304 of the magnetic tape 101, and MPEG format image data is recorded on the portions 303 and 305, respectively. ing.

  If the setting of the user setting switch 109 is set to the MPEG format recording mode, the determination process of the MPEG format recording mode in step S11 of FIG. 3 is affirmed (YES), and the process proceeds to step S12. In step S12, the reproducing operation of the magnetic tape 101 is started. That is, the recording side device (image recording device 20 in FIG. 1) is stopped, and reproduction is performed from the portion 310 of the magnetic tape 101. At this time, since the recording apparatus 20 is stopped, nothing is recorded on the magnetic tape 311 (see FIG. 6B) of the recording apparatus 20.

  In the next step S13, the control unit 107 determines whether or not the reproduction of the data 301 on the magnetic tape 101 has reached a switching change point 306 from the DV format to the MPEG format. This determination is performed, for example, by referring to reproduction information in the data type identification area on the magnetic tape 101 (described later). When the reproduction of the data 301 on the magnetic tape 101 reaches the change point 306, the process proceeds to step S14.

  In step S <b> 14, the control unit 107 transmits a control command for starting recording to the recording-side apparatus 20. This control command uses a known technique (for example, literature: AVC Tape Recorder / Player Subunit Specification). Since the image data transmitted to the recording apparatus 20 at this time is the reproduction data in the MPEG format of the portion 303 on the magnetic tape 101, the MPEG format image data is output from the digital interface 105 (step). S15). Since the recording-side apparatus 20 has received the control command for starting recording, it records the sent MPEG format image data on the part 312 of the magnetic tape 311 (see FIG. 6B).

  Next, the control unit 107 determines whether or not the playback operation of the playback-side device 10 has been stopped (step S16). If stopped, the dubbing process is terminated and the playback operation must be stopped. Then, the process returns to step S13. At this time, since the reproduction of the data 301 on the magnetic tape 101 has already passed the changing point 306 where the DV format is switched to the MPEG format, the process proceeds to step S17.

  In step S17, the control unit 107 determines whether or not the reproduction of the data 301 on the magnetic tape 101 has reached a change point 307 at which the MPEG format is switched to the DV format. When the reproduction of the data 301 on the magnetic tape 101 reaches the change point 307, the process proceeds to step S18.

  In step S <b> 18, the control unit 107 transmits a control command for stopping recording to the recording-side apparatus 20. Then, the recording side apparatus 20 once stops the recording operation at the part 313 of the magnetic tape 311. The DV format image data is sent as it is to the digital interface 105 (step S19), but the recording side apparatus 20 does not record it.

  Thereafter, after the determination process in step S16, when the continuing reproduction operation reaches the switching point 308 from the DV format to the MPEG format again (step S13), the recording start control command is sent to the recording-side apparatus 20. Is transmitted (step S14). The recording-side apparatus 20 records the received MPEG format image data (step S15) on the part 314 of the magnetic tape 311 (see FIG. 6B).

  In this way, as shown in FIG. 6B, the recording-side apparatus 20 collects only MPEG format image data from the stream data with mixed image formats on the magnetic tape 311 of the recording-side apparatus 20. Can be recorded. At this time, there is no useless blank portion on the magnetic tape 311.

  Note that the format change point determined in steps S13 and S17 can be determined by referring to the reproduction information in the data type identification area, for example, as described above. This point will be described with reference to FIG.

  FIG. 7 is a diagram showing a track pattern recorded on the magnetic tape.

  In the reproducing operation of the data on the magnetic tape 101, tracks arranged side by side as indicated by an arrow 402 are reproduced while tracing as indicated by an arrow 401 in FIG. 7 by the magnetic head 108 attached to the rotating drum. Here, the data type identification area 403 is at the beginning of the trace direction in each track. During the reproduction operation, the data type identification area 403 is first traced first, and then information recorded on the entire track is read.

(B) DV Format Recording Mode FIGS. 8A and 8B are diagrams showing the data recording state of the magnetic tape 101 for explaining the operation in the DV format recording mode.

  If the setting of the user setting switch 109 is set to the DV format recording mode, the determination process of the DV format recording mode in step S21 of FIG. 3 is affirmed (YES), and the process proceeds to step S22 of FIG. In step S22, the reproduction operation of the data 301 on the magnetic tape 101 is started as in step S12 of FIG. However, the reproduction is started from the portion 410 (see FIG. 8A) of the magnetic tape 101.

  Thereafter, the process proceeds to step S23, and for example, with reference to the reproduction information in the data type identification area, it is determined whether or not the reproduction of the magnetic tape 101 has reached a switching change point 310 from the MPEG format to the DV format. When the reproduction of the magnetic tape 101 reaches the change point 310, the process proceeds to step S24.

  In step S24, the control unit 107 transmits a recording start control command to the recording-side apparatus 20 in the same manner as in step S14. Since the image data transmitted to the recording-side device 20 at this time is DV format reproduction data of the portion 302 on the magnetic tape 101, DV format image data is output from the digital interface 105 (step). S25). Since the recording-side apparatus 20 has received the control command for starting recording, it records the sent DV format image data on the part 412 of the magnetic tape 311 (see FIG. 8B).

  In the next step S26, the control unit 107 performs the same process as in step S16, and returns to step S23. At this time, since the reproduction point of the magnetic tape 101 has already passed the changing point 310 where the MPEG format is switched to the DV format, the process proceeds to step S27.

  In step S27, the control unit 107 determines whether or not the reproduction of the magnetic tape 101 has reached a change point 306 at which the DV format is switched to the MPEG format. When the reproduction of the magnetic tape 101 reaches the change point 306, the process proceeds to step S28.

  In step S28, the control unit 107 transmits a recording stop control command to the recording-side apparatus 20 as in step S17. The image data in the MPEG format is sent as it is to the digital interface 105 (step S29), but the recording side apparatus 20 does not record it.

  Thereafter, after the determination process in step S26, when the continuing reproduction operation reaches the switching point 307 for switching from the MPEG format to the DV format again (step S23), the recording start control command is sent to the recording side apparatus 20. Is transmitted (step S24). The recording-side apparatus 20 records the received DV format image data on the portion 414 of the magnetic tape 311 (see FIG. 8B).

  In this manner, as shown in FIG. 8B, the recording-side apparatus 20 collects only DV format image data from the stream data with mixed image formats on the magnetic tape 311 of the recording-side apparatus 20. Can be recorded. At this time, there is no useless blank portion on the magnetic tape 311.

(C) All format recording mode In this embodiment, the all format recording mode is a mode in which MPEG format and DV format image data is recorded on the magnetic tape 311 of the recording apparatus 20 from stream data in which image formats are mixed. is there.

  In this recording mode, the operation in the above-described MPEG format recording mode (FIG. 3) differs only in that the processing in step S38 in FIG. 5 is executed instead of the processing in step S18 in FIG. The same. That is, in the operation in the all-format recording mode, the control unit 107 does not start recording regardless of whether a switching change point from the DV format to the MPEG format or a switching change point from the MPEG format to the DV format is detected. A control command is transmitted (steps S14 and S38 in FIG. 5).

  As a result, the image data of each image format of the stream data in which the image formats are mixed can be dubbed onto the magnetic tape 311 of the recording device 20 in the order as it is.

<Advantages of this embodiment>
As described above, in the present embodiment, only the MPEG format or DV format image data is recorded from the stream data in which the image formats are mixed without requiring a complicated operation by the operator. 311 can be collected and recorded. At this time, there is no useless blank portion on the magnetic tape 311 and image data can be efficiently dubbed.

  It is to be noted that the 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 to perform computer (or control unit, MPU, etc.) of the system or apparatus. ) Is also achieved by reading and executing the program code stored in the storage medium.

  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. .

  The storage medium for supplying the program code is, for example, a floppy (registered trademark) disk, hard disk, magneto-optical disk, CD-ROM, CD-R, CD-RW, DV format D-ROM, DV format D. -Optical discs such as RAM, DV format D-RW, DV format D + 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 Etc. include a case where the functions of the above-described embodiments are realized by performing part or all of the actual processing.

  Furthermore, after the program code read from the storage medium is written to a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the expanded function is based on the instruction of the program code. The control unit or the like provided in the expansion board or the 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 block diagram which shows schematic structure of the image reproduction apparatus which concerns on embodiment. It is an external view which shows an example of the user setting switch in FIG. It is a flowchart which shows operation | movement of the image reproduction apparatus which concerns on embodiment. It is a flowchart which shows operation | movement of the image reproduction apparatus which concerns on embodiment. It is a flowchart which shows operation | movement of the image reproduction apparatus which concerns on embodiment. It is a figure which shows the data recording state of a magnetic tape. It is a figure which shows the track pattern recorded on a magnetic tape. It is a figure which shows the data recording state of a magnetic tape. It is a block diagram which shows the structure of the conventional image reproduction apparatus. It is explanatory drawing for demonstrating the dubbing operation | movement of the conventional image reproduction apparatus. It is explanatory drawing for demonstrating the dubbing operation | movement of the other conventional image reproduction apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image reproducing apparatus 20 Image recording apparatus 101 Magnetic tape 102 Servo part 103 Image processing part 104 Display part 105 Digital interface 106 Interface cable 107 Control part 108 Magnetic head 109 User setting switch

Claims (5)

In an image reproduction apparatus comprising reproduction means for performing reproduction operation of a recording medium on which data of a plurality of image formats are recorded and generating reproduction data, and control means for recording the reproduction data on a recording medium of an external device.
The control means includes
Timing detection means for detecting the switching timing of each image format during the reproducing operation of the recording medium;
An image reproducing apparatus comprising command issuing means for issuing a control command for recording start or recording stop of the reproduction data to the external apparatus according to detection information of the timing detection means . A setting unit for setting a type of an image format of the reproduction data to be recorded on a recording medium of the external device;
The command issuing means issues a control command for recording start or recording stop of the reproduction data to the external device according to the setting information of the setting means and the detection information of the timing detection means. The image reproducing apparatus according to claim 1, wherein   The image reproducing apparatus according to claim 1, wherein the recording medium is a tape medium. Control of an image playback apparatus having playback means for generating playback data by performing playback operations on a recording medium in which data of a plurality of image formats are recorded, and performing processing for recording the playback data on a recording medium of an external device A method,
A timing detection step of detecting a switching timing of each image format during the reproducing operation of the recording medium;
And a command issuing step of issuing a control command for recording start or recording stop of the reproduction data to the external device in accordance with detection information of the timing detection step. Control method. Control of an image playback apparatus having playback means for generating playback data by performing playback operations on a recording medium in which data of a plurality of image formats are recorded, and performing processing for recording the playback data on a recording medium of an external device A computer readable control program for carrying out the method,
A timing detection step of detecting a switching timing of each image format during the reproducing operation of the recording medium;
And a command issuing step for issuing a control command for recording start or recording stop of the reproduction data to the external device in accordance with detection information of the timing detection step.

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