JP2007115308A - Recording/reproducing device and recording/reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain that, for instance, data for prescribed time desired by the user can be easily reproduced. <P>SOLUTION: An animation recording/reproducing device produces a rec review play list for managing the data to be recorded on a recording medium, in the range from the final position of the data to the position retroactive by the prescribed time, and reproduces the data to be recorded on the recording medium in accordance with the rec review play list. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a recording / reproducing apparatus and a recording / reproducing method capable of recording data on a recording medium and reproducing the data recorded on the recording medium.

  2. Description of the Related Art Conventionally, a video camera that captures image data and records and reproduces it on a recording medium such as a magnetic tape or a memory card is known. Some video cameras have a recording review function that automatically reproduces and displays image data recorded a predetermined time before the recording stop position in a state where recording is stopped.

  For example, when a magnetic tape is used as a recording medium, when a recording review instruction is given, the tape is rewound for a predetermined time, for example, several seconds from the recording stop position, and playback is started. Stop playback.

  Further, when a disk medium or a memory card is used as a recording medium, reproduction is started from the beginning of the last recorded image file, and the reproduction is automatically stopped when it is reproduced to the end of the file.

  In addition, it is conceivable that a review image stored in a built-in memory is read and displayed instead of reading data from a recording medium such as a tape, a disk, or a memory card during a recording review. (For example, refer to Patent Document 1 and Patent Document 2).

JP 2001-117163 A JP 2000-350135 A

  However, in the prior art, when the image recorded on the disk medium or the memory card is reviewed and reproduced as described above, even if it is desired to check only the last few seconds, the image is reproduced from the beginning of the file recorded immediately before. It ’s not easy to use.

  An object of the present invention is to make it possible to easily reproduce data for a predetermined time desired by a user, for example.

The recording / reproducing apparatus according to the present invention includes a recording unit for recording data on a recording medium, and management data for generating management data for managing up to a position retroactive from a final position of the data recorded on the recording medium. It has generation means, and reproduction means for reproducing the data recorded on the recording medium according to the management data.
The recording / reproducing method of the present invention is a recording / reproducing method of a recording / reproducing apparatus capable of recording data on a recording medium and reproducing the data recorded on the recording medium, wherein the data recorded on the recording medium A management data generating step for generating management data for managing from a final position to a position retroactive to a predetermined time; and a reproduction step for reproducing the data recorded on the recording medium according to the management data. And
A program according to the present invention causes a computer to execute the recording / reproducing method.
The computer-readable recording medium of the present invention is characterized in that the program is recorded.

  In the present invention, management data for managing from the last position of data to a position that is back by a predetermined time is generated, and data reproduction processing is performed according to the management data. Therefore, according to the present invention, for example, data for a predetermined time desired by the user can be easily reproduced.

  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. 1 is a diagram showing a configuration of a camera-integrated moving picture recording / reproducing apparatus according to the first embodiment of the present invention. When the moving image recording / reproducing apparatus is activated, the program compressed in the program flash memory 113 is decompressed / expanded in the program memory 112. The CPU 111 operates in accordance with a program in the program memory 112 and performs various control operations described below. Light from the subject is imaged on the image sensor 102 through the lens group 101. The subject image formed on the image sensor 102 is photoelectrically converted into an electrical signal. A photoelectric conversion image from the image sensor 102 is read at a predetermined cycle, and signal processing is performed by the camera signal processing unit 103 so as to become a standard image signal. Next, a standard digital moving image is temporarily stored in the image memory 104 at a predetermined period, and is sent to the display 106 to display the moving image currently being captured (in a shooting standby state).

  In this shooting standby state, shooting is started by pressing a shooting button (not shown) included in the operation switch 105. When shooting is started, the original moving image data temporarily stored in the image memory 104 is compressed and encoded by the moving image encoding / decoding unit 108 such as MPEG. Next, the compression-coded moving image data is temporarily stored using a shock proof memory (hereinafter referred to as SPM) 114 as a buffer, and then recorded on the optical disc 109 through the interface 110 at a predetermined cycle. When the shooting button included in the operation switch 105 is pressed again, the recording ends. With this recording end operation, recording of one cut video clip ends.

  On the other hand, when a REC review button (not shown) included in the operation switch 105 is pressed in the above-described shooting standby state, the REC review is started based on a predetermined video list file (REC review playlist) described later. . Although the above-described image sensor remains driven, the display 106 is switched from the mode for displaying the image signal of the image sensor to the mode for reproducing the image recorded on the optical disk. At the same time, based on the description of the REC review list, the moving image data is read from the memory 114 or the disk 109 as described later, decoded by the moving image encoding / decoding unit 108, and displayed on the display 106.

  In FIG. 1, the moving image encoding / decoding unit 108 may be a moving image encoding method that independently compresses and encodes each field / frame such as motion JEPG. Also, a moving picture coding system that compresses and encodes independently depending on a field / frame such as MPEG, compresses and encodes a difference between preceding and following frames, and predicts and compresses from a plurality of frames. It doesn't matter. Needless to say, the optical disk 109 may be a hard disk, a magneto-optical disk, or the like, or may be a randomly accessible memory constituted by a solid semiconductor memory such as a FLASH memory or an SRAM / DRAM.

  FIG. 2 is a flowchart showing the operation of the moving picture recording / reproducing apparatus according to the first embodiment of the present invention. Hereinafter, the operation of the moving picture recording / reproducing apparatus according to the present embodiment after the power is turned on will be described.

  When the power is turned on, in step S201, various initialization operations are performed, and the CPU 111 searches for N seconds from the newest recorded video clip recorded in the optical disc 109. Then, a REC review play list, which is a list file designating a moving image clip or a moving image frame corresponding to the start position for N seconds, is created and stored in the shock proof memory 114. Subsequently, the process proceeds to step S202 to enter shooting standby.

  In S203, when the shooting button is pressed, the process proceeds to step S207. In step S207, shooting is started, and image data that has undergone camera signal processing through the image sensor 102 is temporarily buffered in the SPM 114 (step S208), and then sequentially recorded on the optical disc 109 (step S209).

  In the subsequent step S210, the operation of successively recording the images stored in the memory 114 on the optical disc 109 as described above continues until the photographing button is pressed again and the photographing is completed. Here, when the shooting button is pressed and shooting is completed, the process proceeds to step S211, where various end processes as recording operations on the optical disk 109 are performed, and moving image recording is completed. Then, the process proceeds to step S212. Here, the REC review playlist created in step S201 is corrected and stored in the memory 114. The play list in step S212 is a list for reproducing the last N seconds of the clip shot immediately before. Specifically, in the list, the address on the SPM 114 is indicated. That is, the memory 114 can store encoded data for at least N seconds at the average data rate of the moving image data encoded by the moving image encoding / decoding unit 108, and the next shooting is started after the shooting is stopped. Or until the power is turned off. For this reason, the REC review playlist at this point describes that not a file or clip on the disk 109 but a clip for N seconds stored in the memory 114 is reproduced. If the amount of data for the last N seconds is greater than the average rate and the data stored in the memory 114 is less than N seconds, it is an insufficient time (N−M) seconds. Minute data is described in the REC review playlist so that it can be reproduced from the optical disk 109.

  In step S203, if the button operation is a REC review button, the process proceeds to step S204. In step S204, a moving image clip playback operation from the optical disc 109 or SPM 114 is started according to the REC review playlist, and the content is displayed on the display. When the shooting button is pressed during playback, the camera immediately shifts to the shooting standby state (step S202). Further, when the reproduction of the REC review playlist is finished, the process again shifts to the shooting standby state (step S202). Note that the playback time in the REC review playlist is set to a predetermined N seconds, but may be set by a user operation.

  Next, FIG. 3 shows an example in which the REC review time (the predetermined time N) of the REC review playlist is 5 seconds. FIG. 3A shows a state immediately after the power is turned on, and the left end of the file A recorded on the optical disc 109 at the previous photographing is shown as a horizontal band as image data at the start of recording. At this time, the REC review playlist designates the frame position corresponding to the last 5 seconds of the file A, that is, the frame position that is the frame position that goes back 5 seconds from the final position of the file A, and the last This is a list for playing back frames for 5 seconds.

  FIG. 3B shows an example in which a file B is created after 2 seconds of shooting after FIG. The REC review playlist at this time designates the file B in addition to designating the frame position corresponding to the last 3 seconds of the file A (frame position retroactive by 3 seconds from the final position of the file A). Become a list. Therefore, this is a list for playing back frames for a total of 5 seconds. The description in the REC review playlist here is the content for designating the final position from the frame B of the file A and the address of the moving image clip of the file B remaining in the SPM 114.

  FIG. 3C shows a state in which the file C is created after photographing for another 4 seconds. Here, all the video clips for REC review remain on the SPM 114, and the description of the playlist is also the address of the SPM 114. Thus, in the example of FIG. 3C, the last 1 second of file B and 4 seconds of file C are designated. As described above, in the present embodiment, when the last file is less than the predetermined time, the frame position in a certain file corresponding to the position that is back from the last recording position of the data for a predetermined time is designated, and The address of the file to be recorded later is specified. Therefore, for example, when the last recorded image clip is extremely short due to an operation mistake or the like, the problem that the review reproduction period is short and the user cannot confirm is solved, and the data for a predetermined time can always be reproduced. Of course, there may be a plurality of files for which addresses are designated.

-Second Embodiment-
Next, a second embodiment of the present invention will be described. FIG. 4 is a flowchart showing the operation of the moving picture recording / reproducing apparatus according to the second embodiment of the present invention. Parts similar to those in the operation of the moving image recording / playback apparatus according to the present embodiment and the first embodiment are denoted by the same reference numerals as those in FIG. The configuration of the moving image recording / playback apparatus according to the present embodiment is the same as the configuration shown in FIG.

  When the power is turned on, in step S401, along with various initialization operations, the REC review playlist recorded on the optical disc 109 is read, and a moving image clip or moving image frame is read to the SPM 114 according to the list. Thus, when a REC review is performed in step S203 of FIG. 4, playback is always performed from the SPM 114. In step S412, the REC review list corrected every time shooting is always recorded on the optical disc 109. As a result, the REC review list can always be held on the optical disc 109 regardless of whether the power is off or on.

  Of course, when there is no REC review list after power-on, that is, in the case of a new recording medium, a warning notice that playback is not possible may be displayed.

  As described above, in the above-described embodiment, the playback time is managed in units of time spanning between clips (files) as the playback method of the REC review for confirming the previously captured scene. Therefore, it is easy to always perform playback for the time desired by the user. Further, by always storing the shooting scene data used for the REC review in the SPM, the REC review can always be performed quickly.

  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 a computer such as the system reads and executes the program codes from the storage medium. Is also achieved.

  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.

  In addition, the case where the functions of the above-described embodiment are realized by performing part or all of the actual processing by an OS or the like running on the computer based on the instruction of the program code read by the computer. It is.

  Further, after the program code read from the storage medium is written in a memory provided in a function expansion unit connected to the computer, the CPU or the like performs actual processing based on the instruction of the program code, and the above-described processing is performed. The case where the functions of the embodiment are realized is also included.

It is a figure which shows the structure of the moving image recording / reproducing apparatus of the camera integrated type which concerns on the 1st and 2nd embodiment of this invention. It is a flowchart which shows operation | movement of the moving image recording / reproducing apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the example of creation for the rec review time of a rec review play list as 5 second. It is a flowchart which shows operation | movement of the moving image recording / reproducing apparatus which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Lens group 102 Image pick-up element 103 Camera signal processing part 104 Image memory 105 Operation switch 106 Display 107 Image processing part 108 Movie encoding / decoding part 109 Optical disk 110 Interface 111 CPU
112 Program memory 113 Program flash memory 114 Shock proof memory

Claims (9)

Recording means for recording data on a recording medium;
Management data generating means for generating management data for managing from the final position of the data recorded on the recording medium to a position that is traced back a predetermined time;
A recording / reproducing apparatus comprising: reproducing means for reproducing the data recorded on the recording medium according to the management data.   When the last file of the data recorded on the recording medium is less than the predetermined time, the management data generating means includes the other data in the other file corresponding to the position that is back from the final position of the data by the predetermined time. 2. The recording / reproducing apparatus according to claim 1, wherein the management data is generated for managing a position and designating one or a plurality of files including the last file recorded after the other file.   The recording / reproducing apparatus according to claim 1, wherein the management data generation unit corrects the management data every time the data recording end operation is performed.   4. The recording / reproducing apparatus according to claim 1, further comprising setting means capable of arbitrarily setting the value of the predetermined time.   5. The recording / reproducing apparatus according to claim 1, further comprising management data holding means for holding the management data regardless of whether the recording / reproducing apparatus is powered on or off.   6. The recording / reproducing apparatus according to claim 1, wherein the reproducing unit reads the data into a buffer memory in advance before receiving a data reproducing operation. A recording / reproducing method of a recording / reproducing apparatus capable of reproducing data recorded on the recording medium while recording data on the recording medium,
A management data generating step for generating management data for managing from the last position of the data recorded on the recording medium to a position that is back a predetermined time;
And a reproducing step of reproducing the data recorded on the recording medium in accordance with the management data.   A program for causing a computer to execute the recording / reproducing method according to claim 7.   A computer-readable recording medium on which the program according to claim 8 is recorded.

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