JP2004172887A - Data file copying system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data file copying system that only transfers a play list and the portion of a data file required for reproducing the play list. <P>SOLUTION: The data file copying system reads out a play list to be copied from the play list recording means 102 of a camera 1. A data file selecting means 103 reads out in order all data files to be recorded in the play list from a data file recording means 101, and a trimming means 104 extracts portions required for reproducing the data files. A transmitting means 105 transmits trimmed data files to another camera 2. A play list rewriting means 106 rewrites the information at the reproduced spot of each data file registered in the play list. Another transmitting means 107 transmits the rewritten play list to the camera 2. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a data file copying system for copying data files such as moving images and music.
[0002]
[Prior art]
2. Description of the Related Art In a recording / reproducing apparatus such as a CD player, an MD player, and a DVD player that handles media on which a plurality of moving images and audio data are recorded, the moving image and audio data files recorded on the media are replaced in a user's favorite order. You can watch. The one in which the user sets the data file playback order is called a playlist. Some recording / playback apparatuses can set the playback range of a data file by specifying a playback start point and a playback end point in a playlist.
[0003]
Some video data recording / reproducing devices use a large-capacity rewritable optical disc as a recording medium and can edit a video using a playlist. In the case of such an apparatus, a playback start point and a playback end point are specified for each video file by a playlist, instead of actually trimming or joining the video data files to edit one scene. In addition, a moving image editing is realized by setting the reproduction order of the data files and reproducing the data file according to the play list. The moving image edited in this manner is hereinafter referred to as a virtual title.
[0004]
FIG. 4 is an example of a playlist indicating a virtual title and a data file constituting the virtual title. Reference numeral 401 denotes a file in which a playlist is described. In this playlist, a moving image data file 402 having a file name of “athletic meeting.mpg” is stored from the 100th frame to the 350th frame, and then a file having a file name of “hanami.mpg” is displayed. It is described that the moving image data file 403 is reproduced from the 0th frame to the 500th frame, and the moving image data file 404 having a file name of “excursion.mpg” is sequentially reproduced from the 230th frame to the 460th frame. As described above, the user of the recording / reproducing apparatus edits the contents written in the playlist 401 to specify the reproduction range and the reproduction order of the moving image data file to be reproduced according to the playlist 401, that is, to edit the moving image. Can be realized.
[0005]
As a technique for performing reproduction using a playlist as described above, a technique described in JP-A-2000-251486 is conventionally known.
[0006]
[Problems to be solved by the invention]
When a virtual title is copied from one recording / reproducing device to another recording / reproducing device in a recording / reproducing device that realizes video editing by a playlist, not only the playlist in which the virtual title is set, but also the playlist Must copy all data files referenced by.
[0007]
However, in the conventional apparatus, even when only a part of a data file having a virtual title is referred to, the entire data file has to be copied. For this reason, there is a problem that it takes a long time to copy and the data capacity of the recording / reproducing apparatus at the copy destination increases.
[0008]
An object of the present invention is to provide a data file copying system that solves such a problem.
[0009]
[Means for Solving the Problems]
According to the present invention, in order to solve the above problems, a data file copying system according to the present invention records a plurality of moving image and audio data files and a playlist in which a reproduction order and a reproduction range of the data files are set. What is claimed is: 1. A data file reproducing system comprising: a transmitting device; and a receiving device for copying a playlist and a data file referred to by the playlist from the transmitting device, wherein the transmitting device records the data file. A first data file recording unit, a first playlist recording unit for recording a playlist, a selection unit for selecting a data file recorded in a playlist from the first data file recording unit, Trimming means for trimming a required portion from the data file selected by the means; Playlist rewriting means for rewriting a playlist in accordance with the trimming processing performed by the trimming means, data file transmitting means for transmitting the data file trimmed by the trimming means to the receiving side device, and recording in the first recording means And a playlist transmitting unit for transmitting the created playlist to the receiving-side device.
[0010]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0011]
FIG. 1 shows a schematic block diagram of a recording / reproducing system according to an embodiment of the present invention. Reference numeral 1 denotes a camera (transmitting apparatus) that records a plurality of moving image data files and a playlist. Reference numeral 2 denotes a camera (reception-side device) for copying a virtual title from the camera 1. Reference numeral 3 denotes an IEEE 1394 cable for connecting the camera 1 and the camera 2. Of course, the present invention is also effective when cameras 1 and 2 are connected by a method other than IEEE1394.
[0012]
The configuration of the camera 1, which is the transmitting device, will be described. 101 is first data file recording means for recording a data file, and 102 is first playlist recording means for recording a playlist. The first data file recording unit 101 and the first playlist recording unit 102 actually include a recording medium including a disk medium such as a DVD, a memory medium, and / or a hard disk. In this embodiment, the first data file recording unit 101 and the first playlist recording unit 102 are logically handled as different blocks, but may be physically the same device.
[0013]
103 is a data file selection means for selecting an arbitrary data file from the data file recording means 101. The data file selection means 103 actually comprises a CPU, a memory, and a means for accessing the recording medium, and the data file referred to by the playlist read from the playlist recording means 102 is read from the data file recording means 101 by the data file recording means 101. Can be selected and read.
[0014]
Numeral 104 denotes a trimming means for trimming from the data file selected by the data file selecting means 103 to the reproduction start point to the reproduction end point. This means that the trimming means 104 is not used when extracting from the beginning to the end of the data file. A specific example of the trimming process will be described later in detail with reference to FIG.
[0015]
Reference numeral 105 denotes a data file transmission unit that transmits the data file trimmed by the trimming unit 104 to another device, here, the camera 2 via the IEEE1394 cable 3. Reference numeral 106 denotes a playlist rewriting means for rewriting a playlist in accordance with the trimming process performed by the trimming means 104. A specific example of the playlist rewriting process will be described later in detail. Reference numeral 107 denotes a playlist transmitting unit that transmits the playlist recorded in the playlist recording unit 102 to another device, here, the camera 2 via the IEEE1394 cable 3. The data file transmission unit 105 and the playlist transmission unit 107 are realized by an IEEE 1394 communication function. In this embodiment, the data file transmission unit 105 and the playlist transmission unit 107 are logically handled as separate blocks, but may be physically the same device.
[0016]
Reference numeral 108 denotes first photographing means for photographing a moving image and recording sound, and includes a lens, an image sensor for converting an optical image of a subject into an electric signal, an A / D converter for digitizing the electric signal, An image processing unit for converting the converted data into digital image data of a predetermined format, an encoder for compressing the digitized image data by a DV system or an MPEG system, and the like.
[0017]
Reference numeral 109 denotes a first reproducing unit that reproduces the data file and the virtual title recorded in the first data file recording unit 101 and the first playlist recording unit 102, and decodes the compression-encoded digital data. It comprises a decoder, a D / A converter for converting the decoded digital data into an electric signal, and a monitor for displaying the electric signal.
[0018]
Although not shown, the camera 1 has a system control device that controls the overall operation of the camera 1 and input means that is a user interface when a user operates the camera 1.
[0019]
The configuration of the camera 2 which is the receiving side device will be described. 201 is a playlist receiving means for receiving a playlist via the IEEE 1394 cable 3, and 202 is a data file receiving means for receiving a data file via the IEEE 1394 cable 3. The playlist receiving means 201 and the data file receiving means 202 are realized by an IEEE 1394 communication device. In the present embodiment, the data file receiving means 201 and the playlist receiving means 202 are logically handled as separate blocks, but may be physically the same device.
[0020]
Reference numeral 203 denotes a second playlist recording unit that records the playlist received by the playlist receiving unit 201. Reference numeral 204 denotes a second data file recording unit that records the data file received by the data file receiving unit 202. The playlist recording unit 203 and the data file recording unit 204 include a recording medium including a disk medium such as a DVD, a memory medium, and / or a hard disk. In the present embodiment, the second playlist recording unit 203 and the second data file recording unit 204 are logically handled as different blocks, but may be physically the same device.
[0021]
Reference numeral 205 denotes a second photographing unit for photographing a moving image and recording a sound, including a lens, an image sensor for converting an optical image of a subject into an electric signal, an A / D converter for digitizing the electric signal, An image processing unit for converting the converted data into digital image data of a predetermined format, an encoder for compressing the digitized image data by a DV system or an MPEG system, and the like.
[0022]
Reference numeral 206 denotes a second reproducing unit that reproduces the data file and the virtual title recorded in the playlist recording unit 203 and the data file recording unit 204, and a decoder that decodes the compression-encoded digital data, It comprises a D / A converter for converting data into an electric signal, a monitor for visually displaying output data of the D / A converter, and the like.
[0023]
Although not shown, the camera 2 has a system control device that controls the overall operation of the camera 2 and input means that is a user interface when a user operates the camera 2.
[0024]
The operation of copying a virtual title from the camera 1 to the camera 2 will be described with reference to FIGS. Copying a virtual title is actually copying a playlist and each data file referenced by the playlist.
[0025]
In this embodiment, the file names of the playlist and each data file are the same at the copy source and the copy destination. In the case of this method, it is necessary to confirm beforehand that a file having the same file name as the playlist and data file to be copied from the camera 1 does not exist in the camera 2 before actually copying. As a method of realizing this, the camera 1 sequentially inquires the camera 2 about the file names of the playlist and each data file, and if a file having the same name is found, a warning is received from the camera 2 and copying is interrupted at that point. Is considered.
[0026]
As another realization method, one command may make an inquiry to the camera 2 about a plurality of file names, instead of making an inquiry using one command for each file name.
[0027]
As a method of giving a file name of a copy destination, a method of generating and using a file name that does not exist in the camera 2 is also conceivable. In this case, a random number may be used to generate a file name. Basically, the same file name as that of camera 1 is used. If a file with the same name exists in camera 2, the file name "2" may be added to the end (if the name is also in the camera 2, "2" may be added to the end of the file name).
[0028]
FIG. 2 shows an operation flowchart of the camera 1 which is a transmitting apparatus. When a copy operation is started by a user input or a signal from the camera 2, first, a playlist to be copied is read from the playlist recording unit 101 (S201), and the playlist is rewritten by the playlist rewriting unit 106 as described later. Rewriting and transmission to the camera 2 by the playlist transmission means 107 (S203).
[0029]
Next, the data file selecting unit 103 reads one data file referenced by the playlist read out in S201 from the data file recording unit 2 (S204). The data file to be read is the head file that has not been read yet among the files recorded in the playlist. Further, the trimming means 104 reads the reproduction start point and the reproduction end point of the data file from the play list, trims the data file and extracts the data file from the reproduction start point to the reproduction end point (S205). However, if the reproduction start point and the reproduction end point are not instructed in the playlist, the trimming in S205 may not be performed, and the entire data file may be output from the trimming unit 104. This trimming process will be described later in detail with reference to FIG. Then, the data file transmitting unit 105 transmits a part or all of the data file extracted by the trimming unit 104 to the camera 2 (S206).
[0030]
At this point, it is determined whether all the data files referred to by the playlist have been transmitted (S207). If there is a data file that has not been transmitted yet, the process returns to S204, and the next data file is read from the data file recording means 102 by the data file selection means 103. If all data files referred to by the playlist have been transmitted in S207, the copy operation of the camera 1 ends.
[0031]
FIG. 3 shows a flowchart of a copy operation of the camera 2 which is a receiving device. First, the playlist receiving unit 201 receives the playlist transmitted from the camera 1 (S301). The playlist recording unit 203 records the received playlist (S302).
[0032]
The data file receiving means 202 receives one trimmed data file transmitted from the camera 1 (S303). The data file recording unit 204 records the received data file (S304). At this point, it is determined whether or not the camera 1 has received all the data files transmitted in S205 (S305). As the determination method in S305, a method in which the number of data files transmitted from the camera 1 to the camera 2 is transmitted in advance, and a signal indicating completion of transmission of the data file to the camera 2 after the camera 1 has transmitted all data files. Can be sent. If it is determined in step S305 that a data file that has not yet been received remains, the process returns to step S303 to receive the next data file. If it is determined in step S305 that all data files have been received, the copy operation ends.
[0033]
With the above operation, the virtual title of camera 1 can be copied to camera 2.
[0034]
FIG. 5 shows a specific example of the trimming process performed by the trimming unit 104. Reference numeral 501 denotes a moving image data file having a file name of “athletic meeting.mpg”. Reference numerals 502 to 505 denote the number of frames from the beginning in the moving image data file 501.
[0035]
When reproducing a virtual title as indicated by the playlist 401 in FIG. 4, the necessary part of the data file 501 is in the range from the 100th frame (503) to the 350th frame (504). No parts needed. Therefore, before transmitting the data file 501 to the camera 2, the trimming unit 104 trims only a necessary part (a part indicated by oblique lines).
[0036]
Thus, the file 506 is obtained by trimming the data of the moving image data file 501 from the data of the 100th frame to the data of the 350th frame. Reference numerals 507 and 508 denote the number of frames from the beginning in the moving image data file 506, which are the 0th frame and the 250th frame, respectively.
[0037]
Similarly, 509 and 511 are data files recorded in the play list 401, and 510 and 512 are files obtained by trimming them respectively. Reference numeral 510 denotes an example in which the entire data file is trimmed.
[0038]
In the present embodiment, when the data files 501, 509, 511 referred to by the playlist 401 of the camera 1 are copied to the camera 2, the data files 501, 509, 511 are copied to the file 506 in the camera 1. , 510, 512. Therefore, if the play list 401 is copied to the camera 2 as it is, an inconsistency occurs between the play list 401 and the trimmed data file. For example, according to the playlist 401, the camera 1 starts playback from the 100th frame of the data file 501. When the virtual title is played back by the camera 2 using the playlist as it is, the data is trimmed and copied. The data is reproduced from the 100th frame of the data file 506, that is, the frame corresponding to the 200th frame of the data file 501.
[0039]
Therefore, prior to copying the playlist 401 to the camera 2, it is necessary to rewrite the playlist 401 so that there is no inconsistency with the copied data file. This processing is performed by the playlist rewriting means 106. Here, the reproduction start point and the reproduction end point of each data file recorded in the playlist are rewritten according to the following rules. That is, the reproduction start points of the data file are all set to 0, and the reproduction end point of the data file is obtained by subtracting the value of the original reproduction start point of the data file from the value of the original reproduction end point. When the playlist 401 is rewritten according to this rule, a playlist 601 shown in FIG. 6 is obtained. If this playlist 601 is sent to the camera 2, inconsistency between the playlist 601 and each of the data files 602, 603, and 604 that have been trimmed and copied in the playback of the virtual title does not occur.
[0040]
In the present embodiment, the rewriting of the playlist is executed by the camera 1 as the transmitting device, but the rewriting may be performed by the camera 2 as the receiving device.
[0041]
(Other)
Hereinafter, embodiments of the present invention will be listed.
[0042]
(Embodiment 1) The receiving-side device includes:
Data file receiving means for receiving the data file transmitted by the data file transmitting means,
A second data file recording unit that records the data file received by the data file receiving unit,
Playlist receiving means for receiving the playlist transmitted by the playlist transmitting means,
2. The data file copying system according to claim 1, further comprising a second playlist recording unit that records the playlist received by the playlist reception unit.
[0043]
(Second Embodiment) The data file playback system according to the first or first embodiment, wherein the transmission-side device and the reception-side device are cameras capable of editing a moving image using a playlist.
[0044]
(Embodiment 3) A transmitting device that records a plurality of moving image and audio data files and a playlist in which a reproduction order and a reproduction range of the data files are set, and a playlist and a playlist from the transmitting device. A method of copying a data file copying system, comprising: a receiving device for copying a data file referred to;
A selection step of selecting a data file recorded in the playlist to be transmitted,
A trimming step for trimming a required portion from the selected data file;
A playlist rewriting step of rewriting the playlist to contents according to the trimming process in the trimming step,
A data file transmitting step of transmitting the data file trimmed by the trimming step to the receiving side device,
Transmitting a playlist rewritten in the playlist rewriting step to the receiving device.
[0045]
(Embodiment 4) A transmitting device that records a plurality of moving image and audio data files and a playlist in which the reproduction order and the reproduction range of the data files are set, and a playlist and a A method of copying a data file copying system, comprising: a receiving device for copying a data file referred to;
A selection step of selecting a data file recorded in the playlist to be transmitted,
A trimming step for trimming a required portion from the selected data file;
A data file transmitting step of transmitting the data file trimmed by the trimming step to the receiving side device,
A playlist transmission step of transmitting the playlist to the receiving device,
A method of rewriting the received playlist to contents according to the trimming process in the trimming step in the receiving device.
[0046]
(Embodiment 5) The method according to embodiment 3 or 4, wherein the transmitting device and the receiving device are cameras capable of editing a moving image using a playlist.
[0047]
(Embodiment 6) A recording medium on which program software for realizing the functions described in Embodiment 3 or 4 is recorded.
[0048]
【The invention's effect】
As can be easily understood from the above description, according to the present invention, when a virtual title is copied from a recording / reproducing apparatus to another Since the necessary portion of the data file referred to by the title is trimmed and copied, the time required for copying can be reduced, and the data capacity of the recording / reproducing apparatus at the copy destination is reduced.
[Brief description of the drawings]
FIG. 1 is a schematic block diagram of an embodiment of the present invention.
FIG. 2 is an operation flowchart of the camera 1.
FIG. 3 is an operation flowchart of the camera 2.
FIG. 4 is an example of a file in which a playlist is recorded and a data file referred to by the playlist.
FIG. 5 is an example of a data file trimming process.
FIG. 6 is an example of a playlist after a playlist rewriting process and a data file referred to by the playlist.
[Explanation of symbols]
1 transmitting device (camera 1)
2 Receiver (camera 2)
3 IEEE1394 cable 101 First data file recording means 102 First playlist recording means 103 Data file selection means 104 Trimming means 105 Data file transmission means 106 Playlist rewriting means 107 Playlist transmission means 108 First photography means 109 1 reproduction means 201 playlist receiving means 202 data file receiving means 203 second playlist recording means 204 second data file recording means 205 second photographing means 206 second reproducing means

Claims (1)

A transmitting apparatus that records a plurality of moving image and audio data files and a playlist in which the reproduction order and the reproduction range of the data files are set; and a playlist and a data file that the transmitting apparatus refers to. And a receiving device for copying the data file, wherein the transmitting device,
First data file recording means for recording a data file;
First playlist recording means for recording a playlist;
Selecting means for selecting a data file recorded in a playlist from the first data file recording means;
Trimming means for trimming a necessary portion from the data file selected by the selecting means,
Playlist rewriting means for rewriting a playlist according to the trimming process performed by the trimming means,
A data file transmitting unit for transmitting the data file trimmed by the trimming unit to the receiving side device,
A data file copying system, comprising: a playlist transmitting unit for transmitting the playlist recorded in the first recording unit to the receiving side device.

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