JP2007124538A - Electronic apparatus and reproduction control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To register a reproduction start position of stream data without interrupting recording and/or reproduction of the stream data. <P>SOLUTION: A light having passed through a lens unit 2 is converted into motion image data in an imaging unit 3. A compressing/decompressing unit compresses the motion image data to generate a motion image file. The motion image file is serially recorded in an HDD (Hard Disk Drive) 7. If a marking button 10 is depressed in recording the motion image file, an index generating unit 6 generates bookmark information 24 from time information generated when the marking button 10 is depressed, and stores the generated information in a memory 4. The index generating unit 6 causes the memory 4 to store the bookmark information 24 every time the marking button 10 is depressed. Upon completion of imaging of the motion image, the index generating unit 6 links the file information 23 of a motion image file for which imaging has completed with the bookmark information accumulated in the memory 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic device having a function of managing the reproduction start position of stream data, and a reproduction management method for managing the reproduction start position of stream data.

  2. Description of the Related Art Conventionally, there is a disk playback device that registers a bookmark in a moving image file recorded on a disk and starts playback from the position where the bookmark is registered. When a marker key is operated during playback of a moving image, this disc playback device registers the address of the disc being played back at that time as a bookmark, and when the marker key is operated when the disc is not being played back, The still images registered as thumbnail images are displayed side by side as thumbnail images, and the marker No. corresponding to the displayed thumbnail image is displayed. Is selected, the selected marker No. The reproduction of the disc is started from the address corresponding to (for example, Patent Document 1).

JP 2004-280940 A

  In the invention described in Patent Document 1, bookmark management information is described in a dedicated table. Therefore, when a moving image file is reproduced, a table managing bookmarks must be accessed separately from the file managing the moving image file.

  In addition, in the invention described in Patent Document 1, when a bookmark is registered, a marker display portion which is a menu screen is displayed, and a bookmark is set on the marker display portion. However, if the menu screen is displayed during the reproduction of moving image data, the user's viewing of moving images is interrupted. In the invention described in Patent Document 1, a technique for registering a bookmark during reproduction is disclosed, but a technique for registering a bookmark during recording is not disclosed.

  The present invention has been made in view of the above-described problems, and provides an electronic apparatus capable of registering a reproduction start position of stream data without interrupting recording and / or reproduction of stream data. Objective.

  In order to achieve the above-described object, an electronic device and a playback management method to which the present invention is applied store bookmark information in a memory when a registration of a bookmark is instructed during recording of stream data. After all the stream data is recorded in the recording unit, the bookmark information recorded in the memory is registered in the index file, and the bookmark information is linked to the file information of the stream data.

  Also, an electronic device and a playback management method to which the present invention is applied read a file and an index file from a predetermined recording medium, and at the start of the file based on the file information of the index file or the playback start position described in the bookmark information Perform cueing.

  According to the present invention, when the registration of the bookmark is instructed while the stream data is being recorded in the recording unit, the bookmark information describing the information about the bookmark is stored in the memory, and after the acquisition of the stream data is completed, Since the bookmark information stored in the memory is registered in the index file, the bookmark can be registered even while the stream data is being recorded.

  Further, according to the present invention, file information describing file attributes, thumbnail images reminiscent of file contents, and bookmark information describing bookmark-related information are managed by a single file called an index file. Access time can be shortened.

  A video camera to which the present invention is applied will be described below with reference to the drawings. A video camera to which the present invention is applied has a function of recording moving image data and a function of reproducing recorded moving image data. A bookmark can be registered during recording of moving image data or during reproduction of moving image data. When a bookmark is registered, cue playback can be performed from the position where the bookmark is registered. Information related to bookmarks (hereinafter referred to as bookmark information) is stored in a file called an index file.

  In addition to bookmark information, the index file describes folder structure, file attribute information, bookmark time information, file thumbnail images, and the like. The video camera improves the access speed by collectively managing these pieces of information.

  The index file describes management information not only for moving image files but also for various types of files such as still image files and audio files. In the index file, files of different types can be managed centrally.

  FIG. 1 shows an example of a video camera 1 to which the present invention is applied. The video camera 1 stores a lens unit 2 that performs focusing and zooming of a subject, an imaging unit 3 that includes an imaging element such as a CCD (Charge Coupled Device) and a CMOS (Complementary MOS), and bookmark information and thumbnail images. A memory 4, a file generation unit 5 that converts moving image data and still image data into a predetermined file format, and an index file 8 that is recorded in an HDD (Hard Disk Drive) 7, and an index file during shooting and playback 8, an index generation unit 6 for registering a bookmark, an LCD (Liquid Crystal Display) 9 for displaying an image, a marking button 10 for registering a bookmark, a playback button for instructing start of playback, and a previous file Cue button 12 for instructing cue playback of the file, and pointing to cue playback of the next file It comprises a cue button 13, a menu button 14 for instructing inputs the generated menu screen, a playback manager 15 for managing the reproduction start position, and a control unit 16 for controlling the entire video camera 1.

  In the moving image data recording process, the imaging unit 3 converts the light that has passed through the lens unit 2 into moving image data and stores it in the memory 4. The file generation unit 5 generates a moving image file by compressing moving image data stored in the memory 4 using a predetermined compression method such as MPEG (Moving Picture Expert Group).

  As shown in FIG. 2, the HDD 7 has a file recording area and an index file recording area. During the capturing of moving image data, the file generated by the file generation unit 5 is recorded in the file recording area. When the moving image data is captured, the index file 8 generated by the index generation unit 6 is recorded in the recording area of the index file.

  The index generation unit 6 generates an index file 8. FIG. 3 shows an example of the structure of the index file.

  As shown in FIG. 3, the index file 8 includes a property file 17 and a thumbnail file 18. The thumbnail file 18 stores a file header 19 and a thumbnail image 20 that recalls a file and a bookmark.

  In the property file 17, a file header 21, folder information 22, file information 23, and bookmark information 24 are described. The folder information 22, file information 23, and bookmark information 24 are assigned index numbers for uniquely identifying the information.

  The folder information 22 describes the index number of the folder itself and the index numbers for the files and folders belonging to the folder.

  The file information 23 describes the index number of the file itself, the file type, the file creation date and time, the index number of the thumbnail image 20 linked to the file, and the index number of the bookmark information 24 linked to the file. Yes.

  In the file information 23, the index number of the file itself is the first link information to the file itself such as a moving image file or a still image file. Moreover, the index number of the bookmark information 24 becomes the second link information. Furthermore, the index number of the thumbnail image 20 is the third link information.

  The bookmark information 24 describes the time when the bookmark was registered and the index number of the thumbnail image 20 linked to the bookmark.

  In the thumbnail file 18, a thumbnail image 20 that recalls the contents of the file and a thumbnail image 20 that indicates the position of the bookmark registered in the file are recorded. A thumbnail image that recalls the contents of the file is called a first thumbnail image, and a thumbnail image that indicates the registered position of a bookmark is called a second thumbnail image.

  The linking of the index file 8 will be described with reference to FIG. At the top of the property file in FIG. 4, folder information 22 with an index number “0001” is described. The folder information 22 is linked with file information 23a having an index number “0002” and file information 23b having an index number “0003” as belonging files.

  The file information 23a with the index number “0002” linked to the folder information 22 has the file type “still image”, the shooting date and time “2005/11/14 14:22:22”, and the index number “0001”. "And the image file 50a with the image file number" 0001 "are linked.

  The file information 23b with the index number “0003” has a file type “moving image”, a shooting date and time “2005/11/08 16:44:44”, and an index number “0004” “0005”. It is described that bookmark information “0006”, a thumbnail image 20b with an index number “0002”, and an image file 50b with an image file number “0002” are linked.

  The bookmark information 24a with the index number “0004” linked to the file information 23b has the time information from the top of the file “10 ms” and the thumbnail image 20c with the index number “0003” is linked. is described. Similarly, the bookmark information 24b with the index number “0005” describes that the time information “25 ms” from the top of the file is linked to the thumbnail image 20d with the index number “0004”. The bookmark information 24c with the index number “0006” describes that the time information “40 ms” from the beginning of the file is linked to the thumbnail image 20e with the index number “0005”.

  As described above, in the index file 8, the information linked to the image file 50 linked to the folder and the bookmark information 24 linked to the image file 50 can be read one after another. Further, the thumbnail image 20 linked to the image file 50 and the bookmark information 24 can be read based on the index file 8.

  FIG. 5 schematically shows the relationship between the file information 23 and the bookmark information 24. In FIG. 5, five file information 23 and four bookmark information 24 are drawn. Three bookmark information 24 are linked to the first file information 23, and no bookmark information 24 is linked to the next three file information 23. One bookmark information 24 is linked to the last file information 23.

  The file information 23 and bookmark information 24 are all managed by the index file 8. In the video camera 1 to which the present invention is applied, the file information 23 and the bookmark information 24 are managed by the single index file 8, so that the file information 23 and the bookmark information 24 can be read at a time. The access time of the information 24 is shortened.

  The reproduction management unit 15 manages the reproduction start position of the file using the index file 8. When the play button is pressed, the play management unit 15 reads the index file 8, reads the file information 23 linked to the index folder information 19, and reads the bookmark information 24 linked to the file information 23. Then, the reproduction management unit 15 arranges the bookmark information 24 in the order of time information. Thereby, the bookmark information 24 registered at the time of recording and the bookmark information 24 registered at the time of reproduction are arranged in the order of time information.

  When the cue button 12 is pressed, the reproduction management unit 15 cues to the previous reproduction start position. When the cue button 13 is pressed, cueing to the next playback start position is performed. At this time, if a bookmark is registered in the file, the playback management unit 15 cues the bookmark. On the other hand, if no bookmark is registered in the file, the head of the file is cued.

  When the menu button 14 is pressed, the reproduction management unit 15 reads the thumbnail image 20 linked to the file information 23 and the thumbnail image 20 linked to the bookmark information 24, and the read thumbnail image 20 is read. Generate a menu screen with On the menu screen, a thumbnail image 20 of a still image file, a thumbnail image 20 of a moving image file, and a thumbnail image of a music file are displayed together. When the user operates a direction key (not shown), the thumbnail image 20 can be selected. The selected thumbnail image 20 is displayed with more emphasis than the other thumbnail images 20.

  In the file in which the bookmark is registered, the thumbnail image 20 of the file and the thumbnail image 20 of the bookmark are displayed side by side. When the thumbnail image 20 of the bookmark is selected, the reproduction management unit 15 starts reproduction from the position where the bookmark is registered.

  FIG. 6 shows an example of the menu screen 25. The menu screen 25 shown in FIG. 6 displays nine thumbnail images 26 to 34 in the vertical and horizontal directions. On the left side of the menu screen 25, the date 35 when the file was created is displayed. On the right side of the menu screen 25, a scroll bar 36 indicating the position with respect to the total file amount is displayed.

  A thumbnail image 26 arranged at the left end of the upper stage is a thumbnail image of a moving image file. In this thumbnail image 26, a “GP (group)” symbol 37 indicating that a bookmark has been registered and a symbol 38 indicating that it is a moving image file are displayed. After the thumbnail image 24, bookmark thumbnail images 27 to 29 are displayed. The thumbnail images 27 to 29 of the bookmark are smaller than the thumbnail image 26 of the moving image file and are connected by horizontal lines 39 to 42. In the menu screen 24, the thumbnail image 24 of the moving image file and the thumbnail images 27 to 29 of the bookmark can be visually distinguished depending on the size of the thumbnail images 26 to 36 and the presence or absence of the horizontal lines 39 to 42. .

  A thumbnail image 30 arranged in the middle of the second row is a thumbnail image of a still image file. In the thumbnail image 30, a symbol 43 indicating that it is a still image is displayed. A thumbnail image 31 arranged at the right end of the second row is a thumbnail image of a moving image file. It can be seen that the thumbnail image 30 is not connected with the thumbnail image of the bookmark, and no bookmark is registered.

  Thumbnail images 32 and 33 arranged at the left end of the third row and in the middle are thumbnail images of still image files. These thumbnail images 32 and 33 include symbols 45 and 45 indicating that they are still image files. 46 is displayed. A thumbnail image 34 arranged at the end of the third row is a thumbnail image of a moving image file. In this thumbnail image, a symbol 47 indicating that it is a moving image file is displayed.

  Next, a bookmark registration procedure will be described with reference to FIGS. FIG. 7 is a flowchart showing a registration procedure during recording. When capturing of a moving image starts, the index generation unit 6 first stores the top image of the file as a thumbnail image 20 in the memory 4 (step S1). If the marking button 10 is not pressed (step S2; NO) and the imaging is completed (step S3; YES), the index generation unit 6 generates the file information 23 of the captured file and registers it in the index file 8. Then, the thumbnail image 20 of the file stored in the memory 4 is registered in the index file 8 (step S5).

  On the other hand, when the marking button 10 is pressed during imaging (step S2; YES), the index generation unit 6 generates bookmark information 24 based on the time when the marking button 10 is pressed and stores it in the memory 4 ( In step S6), an image when the marking button 10 is pressed is stored in the memory 4 (step S7). If the imaging is not completed (step S8; NO), the index generation unit 6 proceeds to step S2 and waits for the marking button 10 to be pressed.

  On the other hand, when the imaging is completed (step S8; YES), the index generation unit 6 generates file information 23 of the captured file, registers it in the index file 8 (step S9), and thumbnails of the images stored in the memory 4 The image 20 is registered in the index file 8 (step S10).

  Further, the index generation unit 6 registers the bookmark information 24 stored in the memory 4 in the index file 8 (step S11), and registers the bookmark thumbnail image 20 stored in the memory 4 in the index file 8 (step S11). Step S12).

  In step S1 described above, the thumbnail image 20 is generated from the head image of the moving image stream at the start of shooting. However, after shooting is finished, the head image is read to generate the thumbnail image 20, and is registered in the index file 8. You may do it. Similarly, in step S7 described above, an image when the marking button 10 is pressed during shooting is stored in the memory 4. However, after shooting is completed, an image corresponding to the bookmark information 24 is read out and the thumbnail is read out. The image 20 may be generated and registered in the index file 8.

  Next, a registration procedure during reproduction will be described with reference to FIG. If the marking button 10 is not pressed during playback of the moving image file (step S21; NO), nothing is registered in the index file 8.

  On the other hand, when the marking button 10 is pressed during reproduction (step S21; YES), the index generation unit 6 generates bookmark information 24 based on the time when the marking button 10 is pressed and stores it in the memory 4. Further, an image when the marking button 10 is pressed is stored in the memory 4 (step S23). If the reproduction is not completed (step S24; NO), the index generating unit 6 proceeds to step S21 and waits for the marking button 10 to be pressed.

  On the other hand, when the reproduction is finished (step S24; YES), the index generating unit 6 registers the bookmark information 24 stored in the memory 4 in the index file 8 (step S25), and the bookmark information stored in the memory 4 is stored. The thumbnail image 20 is registered in the index file 8 (step S26).

  In step S23 described above, the image when the marking button 10 is pressed during reproduction is stored in the memory 4. However, after reproduction is completed, an image corresponding to the bookmark information 24 is read out to be a thumbnail image. May be generated and registered in the index file 8.

  FIG. 9 schematically shows the bookmark registration process. During recording and reproduction of a moving image file, the bookmark information 24 and the bookmark thumbnail image 20 are stored in the memory 4 each time the marking button 10 is pressed. As shown in FIG. 9A, the memory 4 stores bookmark information 24 and thumbnail images 20 for the number of times the marking button 10 has been pressed.

  When the recording / playback of the moving image file is completed, the bookmark information 24 and the thumbnail images 20 stored in the memory 4 during the recording / playback are all registered in the index file 8 as shown in FIG.

  As described above, in the video camera 1 to which the present invention is applied, bookmarks can be registered in moving image data being recorded or reproduced. Further, since the bookmark is recorded in the index file 8 together with the file information 23 of the moving image file, the bookmark information 24 can be quickly accessed.

  Further, in the video camera 1 to which the present invention is applied, since the bookmark information 24 is registered in the index file 8 at the end of recording / reproduction, the access time to the HDD 7 during recording / reproduction is reduced, and the bookmark registration process is accelerated. Is done. Note that the bookmark information 24 may be registered in the index file 8 every time the marking button 10 is pressed during reproduction of moving image data.

  In the above embodiment, an example in which a bookmark of a moving image file is registered has been described. However, the present invention can be applied to stream data such as an audio file, not a moving image file.

  Furthermore, although the video camera 1 has been described as an example in the above embodiment, the present invention can also be applied to a video deck other than the video camera 1, a music player, a music recorder, a personal computer, and the like.

It is a block diagram which shows the structure of the video camera to which this invention is applied. It is a schematic diagram which shows the structure of HDD. It is a schematic diagram which shows the structure of an index file. It is the conceptual diagram which visualized the link with folder information, file information, and bookmark information. It is the schematic diagram which visualized the link of file information and bookmark information. It is a conceptual diagram which shows an example of the menu screen which designates a reproduction | regeneration start position. It is a flowchart explaining the bookmark registration procedure at the time of imaging. It is a flowchart explaining the bookmark registration procedure at the time of reproduction | regeneration. It is a schematic diagram which shows the mode of a bookmark registration process.

Explanation of symbols

1 video camera, 2 lens unit, 3 imaging unit, 4 memory, 5 file generation unit, 6 index generation unit, 7 HDD, 8 index file, 9 LCD, 10 marking button, 11 playback button, 12, 13 cue button, 14 menu buttons, 15 playback management section, 17 property file, 18 thumbnail file, 20 thumbnail image, 22 folder information, 23 file information, 24 bookmark information

Claims (14)

A stream data acquisition unit for acquiring stream data;
A file generator for converting the acquired stream data into a predetermined file format;
A recording unit for recording the stream file generated by the file generation unit;
An index file generating unit that generates an index file having a plurality of file information including first link information to each stream file recorded in the recording unit;
When the registration of the bookmark is instructed when the stream data is acquired, the bookmark information describing the information related to the bookmark is stored in the memory, the stream data is recorded in the recording unit, and then the bookmark information is recorded in the recording unit. And a bookmark information registration unit that records second link information to the bookmark information in the file information of the recorded stream file. 2. The electronic apparatus according to claim 1, wherein the bookmark information is recorded in the index file. The recording unit records a first thumbnail image that recalls the contents of the stream file for each stream file, and the index file generation unit includes the corresponding first thumbnail in the file information of each stream file. Generate the above index file to include the third link information to the image,
The bookmark registration unit generates a second thumbnail image reminiscent of the reproduction start position where the bookmark is registered, records the second thumbnail image in the recording unit, and includes link information to the second thumbnail image in the bookmark information. The electronic device according to claim 1, wherein the electronic device is recorded. The stream data is image stream data,
A reproduction management unit that reads the index file recorded in the recording unit and reproduces the image stream data and the first and second thumbnail images based on the index file;
A display unit for displaying the image stream data reproduced by the reproduction management unit and the first and second thumbnail images;
4. The electronic apparatus according to claim 3, wherein the reproduction management unit displays the first thumbnail image and the second thumbnail image together on the display unit. The stream data is image stream data,
A reproduction management unit that reads the index file recorded in the recording unit and reproduces the image stream data and the first and second thumbnail images based on the index file;
A display unit for displaying the image stream data reproduced by the reproduction management unit and the first and second thumbnail images;
An instruction receiving unit for receiving user instructions;
5. The electronic apparatus according to claim 4, wherein when the second thumbnail image displayed on the display unit is selected by the instruction receiving unit, the image stream data is reproduced based on the corresponding bookmark information. . It further has an imaging unit for imaging a subject,
The stream data acquisition unit acquires the image stream data output from the imaging unit,
2. The electronic device according to claim 1, wherein the bookmark registration unit stores information on a position in the image stream when a bookmark registration is instructed in a memory, and records the information as the bookmark information in the recording unit. machine. An index file generating unit that generates an index file having a plurality of file information including first link information to each stream file recorded in a predetermined recording medium;
A stream data reproducing unit that reads out and reproduces the stream file from the recording medium;
When registration of a bookmark is instructed at the time of reproduction of the stream file, bookmark information describing information on the bookmark is recorded on the recording medium, and second link information to the bookmark information is recorded on the reproduced stream file. An electronic device comprising: a bookmark information registration unit that records the file information in the file information. 8. The electronic apparatus according to claim 7, wherein the bookmark information is recorded in the index file. Index including first link information associated with a stream file, second link information to a thumbnail image reminiscent of the contents of the stream file, and third link information to bookmark information registered in the stream file Read the file,
An electronic apparatus comprising: a playback management unit that performs cue playback at the beginning of the stream file or at a playback start position registered in the bookmark information.   The playback management unit presents a head of the file and a playback start position registered in the bookmark information to a user, and performs cue playback from the playback start position specified by the user. 9. The electronic device according to 9.   The reproduction management unit reads a thumbnail image linked to the stream file and a thumbnail image linked to the bookmark information from the index file, creates a menu screen in which the read thumbnail images are arranged, 10. The electronic apparatus according to claim 9, wherein cue playback is started from a playback start position corresponding to the thumbnail image selected on the menu screen.   10. The electronic apparatus according to claim 9, wherein the reproduction management means arranges the bookmark information in order of reproduction start time. A stream data acquisition step of acquiring stream data;
When bookmark registration is instructed at the time of acquisition of the stream data, bookmark information describing the information related to the bookmark is generated and stored in the memory;
A file generation step of converting the acquired stream data into a stream file;
An index file generating step of generating an index file having a plurality of file information including first link information to each stream file;
When the registration of the bookmark is instructed when the stream data is acquired, the bookmark information describing the information related to the bookmark is stored in the memory, the stream file is recorded in the recording unit, and then the bookmark information is recorded in the recording unit. And a bookmark information registration step of recording second link information to the bookmark information in the file information of the recorded stream file. An index file generating step of generating an index file having a plurality of file information including first link information to each stream file recorded in a predetermined recording medium;
A stream data reproduction step of reading the stream file from the recording medium and reproducing the stream file;
When registration of a bookmark is instructed during playback of the stream file, bookmark information describing the bookmark information is recorded on the recording medium, and second link information to the bookmark information is recorded in the played stream file. And a bookmark information registration step for recording the file information in the file information.

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