JP2011223220A - File editing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a file editing device that improves the quality of edited files.SOLUTION: A time zone for fetching image data stored in a first file is detected as a first time zone, and a time zone for fetching image data stored in a second file is detected as a second time zone. Furthermore, reference image data is added to the first file according to a non-overlapped time zone in the second time band which does not overlap with the first time zone, and audio data stored in the second file is added to the first file according to a overlapped time zone between the first time zone and the second time zone.

Description

  The present invention relates to a file editing apparatus, and more particularly to a file editing apparatus that is used in an electronic camera and edits image data and audio data.

  An example of this type of device is disclosed in Patent Document 1. According to this background art, when a plurality of types of data are recorded in association with each other, the recording unit records predetermined marking data generated at a predetermined timing by the marking generating unit together with other data. The specific data acquisition means acquires a predetermined type of data among a plurality of types of data. The specific data recording means records it together with the marking data generated by the marking data generating means. The data recording device synchronizes the marking data recorded by the specific data recording means and the marking data recorded by the recording means, and the specific data recording means records the data among a plurality of types of data recorded by the recording means. The same type of data as the data being rewritten is rewritten with the data recorded by the specific data recording means.

JP 2007-213710 A

  However, in the background art, when there is a time zone that does not overlap with the time zone for taking in one data in the time zone for taking in one data, no special processing is performed for a portion corresponding to the time zone that does not overlap. Therefore, when editing a file containing image data and a file containing audio data in synchronization, a no-image or no-audio part may occur at the beginning or end of the data stored in the edited file. Yes, the quality of the edit file may be degraded.

  Therefore, a main object of the present invention is to provide a file editing apparatus capable of improving the quality of an edited file.

  A file editing apparatus according to the present invention (10: reference numeral corresponding to the embodiment; the same applies hereinafter) includes first detection means (S57, S57, S1) that detects a time period for taking in image data stored in a first file as a first time period. S59), second detection means (S67, S69) for detecting the time period of the audio data stored in the second file as the second time period, and the non-overlapping time that does not overlap with the first time period in the second time period First addition means (S95 to S97, S101 to S103) for adding reference image data to the first file corresponding to the band, and the audio data stored in the second file as the first time zone and the second time zone The second adding means (S105 to S109) for adding to the first file corresponding to the overlapping time zone is provided.

  Preferably, the first file further stores audio data, and the second adding means replaces the audio data stored in the first file with the audio data stored in the second file corresponding to the overlapping time period.

  Preferably, the first addition means includes duplication means (S95, S101) for duplicating a part of the image data stored in the first file to create reference image data.

  More preferably, the duplicating unit duplicates the first frame of the image data when the non-overlapping time zone is a time zone preceding the first time zone.

  More preferably, the duplicating unit duplicates the last frame of the image data when the non-overlapping time zone is a time zone that is delayed from the first time zone.

  Preferably, a discriminating means (S73) for discriminating whether or not the difference between the start time of the first time zone and the start time of the second time zone falls below a reference, and when the discrimination result of the discriminating means is negative Designating means (S75) for designating the second file for detection processing of the second detecting means, and starting means for activating the first adding means and / or the second adding means when the determination result of the determining means is affirmative (S91) is further provided.

  By adding the audio data stored in the second file to the first file corresponding to the overlapping time zone, the image data and the audio data can be reproduced in a manner that is synchronized with each other. Further, by adding the reference image data to the first file in correspondence with the non-overlapping time zone, the correspondence between the audio data and the image data can be ensured over the first time zone. In this way, an edit file having a desired quality is created.

  The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is a block diagram which shows the basic composition of this invention. It is a block diagram which shows a part of structure of one Example of this invention. FIG. 3 is an illustrative view showing one example of a mapping state of an SDRAM applied to the embodiment in FIG. 2; It is an illustration figure which shows an example of the data structure of MP4 file. It is a flowchart which shows a part of operation | movement of CPU applied to the FIG. 2 Example. It is a flowchart which shows a part of other operation | movement of CPU applied to the FIG. 2 Example. It is a block diagram which shows a part of other structure of one Example of this invention. It is an illustration figure which shows an example of the data structure of a PCM file. It is a flowchart which shows a part of operation | movement of MCU applied to the FIG. 2 Example. (A) It is an illustration figure which shows an example of duplication of each capture time slot | zone of MP4 file and PCM file, (B) is an illustration figure which shows another example of duplication of each capture time slot | zone of MP4 file and PCM file It is. (A) is an illustration figure which shows the other example of duplication of each taking-in time zone of MP4 file and PCM file, (B) is still another example of duplication of each taking-in time zone of MP4 file and PCM file. FIG. FIG. 11 is a flowchart showing still another portion of behavior of the CPU applied to the embodiment in FIG. 2; FIG. 10 is a flowchart showing yet another portion of behavior of the CPU applied to the embodiment in FIG. 2; It is a flowchart which shows a part of other operation | movement of CPU applied to the FIG. 2 Example. FIG. 11 is a flowchart showing still another portion of behavior of the CPU applied to the embodiment in FIG. 2;

Embodiments of the present invention will be described below with reference to the drawings.
[Basic configuration]

  Referring to FIG. 1, the file editing apparatus according to the present invention is basically configured as follows. The first detection means 1 detects the capture time zone of the image data stored in the first file as the first time zone. The second detection means 2 detects the time period for taking in audio data stored in the second file as the second time period. The first adding means 3 adds the reference image data to the first file corresponding to a non-overlapping time zone that does not overlap with the first time zone in the second time zone. The second addition means 4 adds the audio data stored in the second file to the first file corresponding to the overlapping time zone between the first time zone and the second time zone.

By adding the audio data stored in the second file to the first file corresponding to the overlapping time zone, the image data and the audio data can be reproduced in a manner that is synchronized with each other. Further, by adding the reference image data to the first file in correspondence with the non-overlapping time zone, the correspondence between the audio data and the image data can be ensured over the first time zone. In this way, an edit file having a desired quality is created.
[Example]

  Referring to FIG. 2, the digital video camera 10 of this embodiment includes a focus lens 12 and an aperture unit 14 driven by drivers 18a and 18b, respectively. The optical image of the object scene is irradiated onto the imaging surface of the image sensor 16 through these members.

  When the imaging mode is selected by the key input device 48, the CPU 46 activates the driver 18c in order to execute the moving image capturing process under the recording control task. In response to the vertical synchronization signal Vsync generated every 1/60 seconds, the driver 18c exposes the imaging surface and sequentially reads out the charges generated on the imaging surface in a scanning manner. From the image sensor 16, raw image data representing the object scene is output at a frame rate of 60 fps.

  The preprocessing circuit 20 performs processing such as digital clamping, pixel defect correction, and gain control on the raw image data output from the image sensor 16. The raw image data subjected to such preprocessing is written into the raw image area 24a (see FIG. 3) of the SDRAM 24 through the memory control circuit 22.

  The post-processing circuit 26 accesses the raw image area 24a through the memory control circuit 22, and reads the raw image data every 1/60 seconds in a sequential scanning manner. The read raw image data is subjected to processing such as color separation, white balance adjustment, YUV conversion, edge enhancement, zoom, and the like, and as a result, YUV image data is created. The created YUV image data is written into the YUV image area 24b (see FIG. 3) of the SDRAM 24 through the memory control circuit 22.

  The LCD driver 30 repeatedly reads the YUV image data stored in the YUV image area 24b, reduces the read image data so as to match the resolution of the LCD monitor 32, and the LCD based on the reduced image data. The monitor 32 is driven. As a result, a real-time moving image (through image) representing the scene is displayed on the monitor screen.

  The preprocessing circuit 20 also simply converts the raw image data into Y data, and provides the converted Y data to the CPU 46. The CPU 46 performs AE processing on the Y data and calculates an appropriate EV value. The aperture amount and the exposure time that define the calculated appropriate EV value are set in the drivers 18b and 18c, respectively, and thereby the brightness of the through image is appropriately adjusted. The CPU 46 also performs AF processing on the high frequency component of the Y data when the AF activation condition is satisfied. The focus lens 12 is arranged at the focal point by the driver 18a, and thereby the sharpness of the through image is continuously improved.

  The clock circuit 54 counts repeatedly generated pulses. The current time as the internal clock of the digital video camera 10 is determined by the reference time set separately and this count. The reference time may be initially set by the operator of the digital video camera 10, or may be taken from an external device when the digital video camera 10 has a wireless communication function or the like.

  When a recording start operation is performed toward the key input device 48, the CPU 46 accesses the memory card 44 through the I / F 42 under the recording control task, and newly creates an MP4 file in the memory card 44 (created MP4 file is opened). In the header of the created MP4 file, the current time is described as the recording start time TSmp4 based on the output of the clock circuit 54.

  When the file creation & opening process is completed, the CPU 46 activates the MPEG4 encoder 38 to start the MP4 encoding process, and activates the AAC encoder 36 to start the audio capturing process.

  The MP4 encoder 38 repeatedly reads YUV image data stored in the YUV image area 24b through the memory control circuit 22, encodes the read image data in accordance with the MPEG4 system, and encodes the encoded image data, that is, MP4 data, into the memory control circuit. 22 is written into the encoded image area 24c (see FIG. 3) of the SDRAM 24.

  The AAC encoder 36 encodes the audio data output from the microphone 34 in accordance with the AAC method, and writes the encoded audio data, that is, AAC data, into the encoded audio area 24d (see FIG. 3) of the SDRAM 24 through the memory control circuit 22.

  Thereafter, every time 60 frames of MP4 data are obtained, the CPU 46 transfers the latest 60 frames of MP4 data and the latest AAC data for one second to the open MP4 file. The latest 60 frames of MP4 data and the latest one second of AAC data are read from the encoded image area 24c and the encoded audio area 24d by the memory control circuit 22, and written to the MP4 file via the I / F 42. Therefore, MP4 data and AAC data are stored in the MP4 file in the manner shown in FIG.

  When a recording end operation is performed toward the key input device 48, the CPU 46 stops the MPEG4 encoder 38 to end the MP4 encoding process, and stops the AAC encoder 36 to end the audio capturing process.

  Thereafter, the CPU 46 performs termination processing. As a result, the MP4 data of less than 60 frames remaining in the SDRAM 24 and the AAC data of less than 1 second are written into the MP4 file. Further, in the MP4 file header, the current time is described as the recording end time TEmp4 based on the output of the clock circuit 54. An open MP4 file is closed after termination processing is completed.

  When the imaging mode is selected, the CPU 46 executes the recording control task shown in FIGS. A control program corresponding to this task is stored in the flash memory 52.

  Referring to FIG. 5, in step S1, a moving image capturing process is executed. As a result, a through image is displayed on the LCD monitor 32. In step S3, it is repeatedly determined whether or not a recording start operation has been performed. If the determination result is updated from NO to YES, the process proceeds to step S5. In step S5, the memory card 44 is accessed through the I / F 42, and an open MP4 file is newly created in the memory card 44. In the header of the created MP4 file, the current time is described as the recording start time TSmp4 based on the output of the clock circuit 54.

  In step S7, the MPEG4 encoder 38 is activated to start the MP4 encoding process, and in step S9, the AAC encoder 36 is activated to start the audio capturing process.

  In step S11, the variable K is set to “1”, and in step S13, it is determined whether or not the MP4 data of the 60 * K frame is completed. When the determination result is updated from NO to YES, the processing after step S15 is executed.

  In step S15, the latest 60 frames of MP4 data stored in the encoded image area 24c is read through the memory control circuit 22, and the read MP4 data is written into the open MP4 file via the I / F 42. In step S17, the latest one-second AAC data stored in the encoded audio area 24d is read through the memory control circuit 22, and the read AAC data is written into the open MP4 file via the I / F 42.

  In step S19, it is determined whether or not a recording end operation has been performed. If the determination result is NO, the variable K is incremented in step S21, and the process returns to step S13. Accordingly, the processes of steps S15 to S17 are executed every time 60 frames of MP4 data are obtained. If the determination result of step S19 is updated from NO to YES, it will progress to step S23.

  In step S23, the MPEG4 encoder 38 is stopped to end the MP4 encoding process, and in step S25, the AAC encoder 36 is stopped to end the audio capturing process.

  In step S27, termination processing is executed. As a result, the MP4 data of less than 60 frames remaining in the SDRAM 24 and the AAC data of less than 1 second are written into the MP4 file. Further, in the MP4 file header, the current time is described as the recording end time TEmp4 based on the output of the clock circuit 54. In step S29, the memory card 44 is accessed through the I / F 42, and the open MP4 file is closed. When the closing process is completed, the process returns to step S3.

  Referring to FIG. 7, IC recorder 100 of this embodiment includes a key input device 120. When a power-on operation is performed by the key input device 120, power based on a battery (not shown) is supplied to the entire system. As a result, the IC recorder 100 is activated.

  The clock circuit 154 counts repeatedly generated pulses. The current time as the internal clock of the IC recorder 100 is determined by the separately set reference time and this count. The reference time may be initially set by the operator of the IC recorder 100, or may be taken from an external device when the IC recorder 100 has a wireless communication function or the like.

  When the recording mode is selected by the key input device 120 and a recording start operation is performed, the MCU 114 accesses the memory card 112 through the I / F 110 under the recording control task, and newly creates a PCM file in the memory card 112. (The created PCM file is opened). In the header of the created PCM file, the current time is described as the recording start time TSpcm based on the output of the clock circuit 154.

  When the file creation & opening process is completed, the MCU 114 activates the codec 130 to start the voice capturing process, and issues an encoding command to the codec 130, respectively. The codec 130 encodes the audio signal captured by the microphone 122 and amplified by the amplifier 128 into digital audio data, and stores the encoded audio data in the memory 116. The MCU 114 records the encoded audio data stored in the memory 116 on the memory card 112 in a file format as shown in FIG.

  When a recording end operation is performed toward the key input device 120, the MPU 114 stops the codec 130 to end the voice capturing process.

  Thereafter, the MPU 114 executes termination processing. As a result, the PCM data remaining in the memory 116 is written into the PCM file. Further, in the header of the PCM file, the current time is described as the recording end time TEpcm based on the output of the clock circuit 154. An open PCM file is closed after termination processing is completed.

  When the recording mode is selected, the MCU 114 executes the recording control task shown in FIG. A control program corresponding to this task is stored in the flash memory 142.

  Referring to FIG. 9, in step S31, it is repeatedly determined whether or not a recording start operation has been performed. If the determination result is updated from NO to YES, the process proceeds to step S33. In step S33, the memory card 112 is accessed through the I / F 110, and an open PCM file is newly created in the memory card 112. In the header of the created PCM file, the current time is described as the recording start time TSpcm based on the output of the clock circuit 154. In step S35, the codec 130 is activated to start the voice capturing process.

  In step S37, it is repeatedly determined whether or not a recording end operation has been performed. If the determination result is updated from NO to YES, the process proceeds to step S39. In step S39, the codec 130 is stopped to end the voice capturing process.

  In step S41, termination processing is executed. As a result, the PCM data remaining in the memory 116 is written into the PCM file. Further, in the header of the PCM file, the current time is described as the recording end time TEpcm based on the output of the clock circuit 154. In step S43, the memory card 112 is accessed through the I / F 110, and the open PCM file is closed. When the closing process is completed, the process returns to step S31.

  Next, processing when the file editing mode is selected by the key input device 48 of the digital video camera 10 will be described.

  For example, in a lecture or the like, the digital video camera 10 is installed at a position away from the speaker to record the video of the lecture in MP4 data, and the IC recorder 100 is installed near the speaker to clearly show the speaker. It is conceivable to record voice in PCM data. In this case, an example will be described in which an edit file is created by combining MP4 data and PCM data after each recording.

  When the file editing mode is selected by the key input device 48 of the digital video camera 10, it is determined whether or not the IC recorder 100 is connected to the USB controller 50 of the digital video camera 10 under the file editing task. If the connection is not normal, the operator is warned to that effect.

  When the operator designates any MP4 file recorded on the memory card 44 through the key input device 48, the CPU 46 sets the recording start time TSmp4 and the recording end time TEmp4 described in the header of the designated MP4 file to I. Detect through / F42.

  The CPU 46 first sets the variable L to “1”. Next, the CPU 46 accesses the memory card 112 of the IC recorder 100 through the USB controller 50 of the digital video camera 10, the USB controller 140 of the IC recorder 100 and the I / F 110, and the PCM file recorded on the memory card 112 is accessed. Detect the number of files. The number of detected files is set to the maximum value Lmax in order to define the variable range of the variable L.

  Of the PCM files stored in the memory card 112, the Lth, that is, the first PCM file is designated, and the recording start time TSpcm and the recording end time TEpcm are detected from the header. The CPU 46 calculates the difference time between the detected recording start time TSmp4 and the recording start time TSpcm as “ΔTS”, and determines whether or not the calculated difference time ΔTS is within 30 seconds. If not within 30 seconds, the variable L is incremented, and the recording start time TSpcm and the recording end time TEpcm are similarly detected from the header of the second and subsequent Lth PCM files. Then, the difference time ΔTS is calculated, and it is determined whether or not the calculated difference time ΔTS is within 30 seconds.

  In this way, the CPU 46 sequentially accesses the PCM file stored in the memory card 112, and searches for a PCM file whose difference time ΔTS is within 30 seconds.

  As a result of accessing all the PCM files, the CPU 46 notifies the operator that the file editing process is impossible when no PCM file having a difference time ΔTS of 30 seconds or less is found. If found, it is determined that the recording of the MP4 file designated by the operator and the recording of the PCM file are performed at the same time, and the process of combining these two files is executed.

  In the file combining process, these two files are combined mainly by replacing the AAC data stored in the designated MP4 file with the PCM data stored in the designated PCM file. Further, since the recording start time TSmp4 of the designated MP4 file and the recording start time TSpcm of the designated PCM file often do not completely coincide with each other, the following processing is executed on the head portion of the edit file.

  Referring to FIG. 10A, when the recording start time TSmp4 precedes the recording start time TSpcm, the time zone from the recording start time TSmp4 to the recording start time TSpcm is stored in the designated MP4 file. AAC data is used as audio data. For a time zone where the recording time zone of the designated MP4 file and the recording time zone of the designated PCM file overlap after the recording start time TSpcm, the PCM data stored in the designated PCM file is used as audio data.

  Referring to FIG. 10B, when the recording start time TSpcm is ahead of the recording start time TSmp4, the difference calculated earlier is obtained for the time zone from the recording start time TSpcm to the recording start time TSmp4. Image data corresponding to the time ΔTS is newly created, and the created image data is used.

  The creation of the image data here is performed by copying the image of the first frame of the designated MP4 file by the number of frames corresponding to the difference time ΔTS.

  As in the case of the start time, the recording end time TEmp4 of the designated MP4 file and the recording end time TEpcm of the designated PCM file often do not completely coincide with each other. .

  The CPU 46 calculates the difference time between the recording end time TEmp4 and the recording end time TEpcm as “ΔTE” under the file combination process.

  Referring to FIG. 11A, when the recording end time TEpcm precedes the recording end time TEmp4, the time zone from the recording end time TEpcm to the recording end time TEmp4 is stored in the designated MP4 file. AAC data is used as audio data.

  Referring to FIG. 11B, when the recording end time TEmp4 precedes the recording end time TEpcm, the time zone from the recording end time TEmp4 to the recording end time TEpcm is calculated first. Image data corresponding to the difference time ΔTE is newly created, and the created image data is used.

  The creation of the image data here is performed by copying the image of the last frame of the designated MP4 file by the number of frames corresponding to the difference time ΔTE.

  As described above, for image data, new image data is created as necessary and added to the beginning or end of the editing file.

  For audio data, first, AAC data is deleted from the designated MP4 file for a time zone in which the recording time zone of the MP4 file and the recording time zone of the PCM file overlap. Next, the PCM data stored in the designated PCM file is converted into data in the AAC format, and AAC data is newly created. The newly created AAC data is stored in the designated MP4 file. At this time, if there is any original AAC data that has not been deleted, the remaining AAC data and the newly created AAC data are combined and stored in the designated MP4 file.

  When the file combination process is completed in this way, the CPU 46 notifies the operator that the edited file is completed.

  When the file editing mode is selected, the CPU 46 executes the file editing task shown in FIGS. This task is also stored in the flash memory 52.

  Referring to FIG. 12, in step S51, it is determined whether or not IC recorder 100 is normally connected to USB controller 50 of digital video camera 10. If the determination result is NO, a warning is generated in step S53 and then the process returns to step S51. If YES, the process proceeds to step S55.

  In step S55, it is repeatedly determined whether or not a file designation operation has been performed. If the determination result is updated from NO to YES, the process proceeds to step S57. In step S57, the recording start time TSmp4 described in the header of the designated MP4 file is detected through the I / F 42, and in step S59, the recording end time TEmp4 described in the header of the designated MP4 file is detected as I / F. Detect through F42.

  In step S61, the variable L is set to “1”. In step S63, the memory card 112 of the IC recorder 100 is accessed through the USB controller 50 of the digital video camera 10, the USB controller 140 of the IC recorder 100, and the I / F 110, and the number of PCM files recorded on the memory card 112 is calculated. To detect. The number of detected files is set to the maximum value Lmax in order to define the variable range of the variable L.

  In step S65, the Lth PCM file is designated. In step S67, the recording start time TSpcm is detected from the header of the designated PCM file, and in step S69, the recording end time TEpcm is detected from the header of the designated PCM file.

  In step S71, the difference time between the detected recording start time TSmp4 and the recording start time TSpcm is calculated as “ΔTS”, and in step S73, it is determined whether or not the calculated difference time ΔTS is within 30 seconds. If the determination result is NO, the process proceeds to step S75, and if it is YES, the process proceeds to step S81.

  In step S75, the variable L is incremented, and in step S77, it is determined whether or not the variable L exceeds the maximum value Lmax. If the determination result is NO, the process returns to step S65, whereas if YES, the process proceeds to step S79. In step S79, the operator is informed that the file editing process is not possible, and thereafter the process ends. In step S81, a file combination process is executed to combine the designated MP4 file and the designated PCM file. When the file combination process is completed, the operator is notified in step S83 that the edited file is completed, and then the process ends.

  The file combining process in step S81 shown in FIG. 13 is executed according to the subroutine shown in FIGS. In step S91, the difference time between the recording end time TEmp4 and the recording end time TEpcm is calculated as “ΔTE”.

  In step S93, it is determined whether or not the recording start time TSpcm is ahead of the recording start time TSmp4. If the determination result is NO, the process proceeds to step S99, whereas if YES, the process proceeds to step S95.

  In step S95, the image of the first frame of the designated MP4 file is duplicated by the number of frames corresponding to the difference time ΔTS. In step S97, the image data created in step S95 is added to the head of the designated MP4 file.

  In step S99, it is determined whether the recording end time TEmp4 is ahead of the recording end time TEpcm. If the determination result is NO, the process proceeds to step S105, and if YES, the process proceeds to step S101.

  In step S101, the last frame image of the designated MP4 file is duplicated by the number of frames corresponding to the difference time ΔTE. In step S103, the image data created in step S101 is added to the end of the designated MP4 file.

  In step S105, AAC data is deleted from the designated MP4 file for a time zone in which the recording time zone of the designated MP4 file and the recording time zone of the designated PCM file overlap. In step S107, the PCM data stored in the designated PCM file is converted into AAC format data. In step S109, the converted AAC data is added to the designated MP4 file.

As can be seen from the above description, the CPU 46 detects the capture time zone of the image data stored in the first file as the first time zone (S57, S59), and the capture time of the audio data stored in the second file. Detecting the time zone as the second time zone
(S67, S69). The CPU 46 also adds reference image data to the first file corresponding to a non-overlapping time zone that does not overlap the first time zone in the second time zone (S95 to S97, S101 to S103), and stores it in the second file. The obtained audio data is added to the first file corresponding to the overlapping time zone between the first time zone and the second time zone (S105 to S109).

  By adding the audio data stored in the second file to the first file corresponding to the overlapping time zone, the image data and the audio data can be reproduced in a manner that is synchronized with each other. Further, by adding the reference image data to the first file in correspondence with the non-overlapping time zone, the correspondence between the audio data and the image data can be ensured over the first time zone. In this way, an edit file having a desired quality is created.

  In this embodiment, when the recording start time TSpcm precedes the recording start time TSmp4, the first frame of the MP4 file before editing is created in the non-overlapping time zone of the head portion of the edited file. The image data is used. However, it is also possible to create image data using an image other than the top frame and use it in the non-overlapping time zone of the top portion. For example, an image of another frame in a GOP (Group Of Picture) including the first frame may be used. Similarly, when the recording end time TEmp4 precedes the recording end time TEpcm, image data is created using an image other than the last frame, and this is used for the non-overlapping time zone at the end of the edit file. You may do it.

  In this embodiment, the digital video camera 10 and the IC recorder 100 are connected, the CPU 46 of the digital video camera 10 executes a file editing task, and the operator operates the key input device 48 of the digital video camera 10. File editing. However, the MCU 114 of the IC recorder 100 may be caused to execute a file editing task and the operator may operate the key input device 120 of the IC recorder 100 to perform file editing.

  Further, the MP4 file and the PCM file may be moved to an external device through the memory cards 44 and 112 and the file may be edited in the device after the file is moved. For example, MP4 files and PCM files can be taken into a hard disk of a personal computer, and file editing can be performed on the personal computer. However, in this case, the processing in steps S51 and S53 shown in FIG. 12 is not executed, and in step S63, it is necessary to access the hard disk of the personal computer instead of the memory card 112 of the IC recorder 100.

  In this embodiment, an edit file is created using image data and audio data obtained by the digital video camera 10 and audio data obtained by the IC recorder 100. However, the present invention can be applied to any combination of image data and audio data other than these as long as they are created under a common time axis and can detect the time zone. For example, when the same object is shot using a plurality of digital video cameras, an edit file may be created by combining image data and audio data recorded in different digital video cameras. . Or what downloaded the image data or audio | voice data produced with the personal computer may be used for a combination.

  In this embodiment, MP4 format data is used for image data, and AAC format data and PCM format data are used for audio data. However, other types of image data or audio data may be used. For example, Motion JPEG format image data and MP3 format audio data may be used.

DESCRIPTION OF SYMBOLS 10 ... Digital video camera 36 ... AAC encoder 38 ... MPEG4 encoder 42 ... I / F
44 ... Memory card 46 ... CPU
48 ... Key input device 50 ... USB controller 100 ... IC recorder 110 ... I / F
112 ... Memory card 140 ... USB controller

Claims (8)

First detection means for detecting a time period for capturing image data stored in the first file as a first time period;
A second detection means for detecting a time period for capturing audio data stored in the second file as a second time period;
First addition means for adding reference image data to the first file corresponding to a non-overlapping time zone that does not overlap with the first time zone in the second time zone, and audio data stored in the second file A file editing apparatus, comprising: a second adding unit that adds a file to the first file corresponding to an overlapping time zone between the first time zone and the second time zone. The first file further contains audio data;
2. The file editing apparatus according to claim 1, wherein the second adding unit replaces audio data stored in the first file with audio data stored in the second file in correspondence with the overlapping time period. 3. 3. The file editing apparatus according to claim 1, wherein the first adding unit includes a duplicating unit that duplicates a part of image data stored in the first file to create the reference image data. 4. 4. The file editing apparatus according to claim 3, wherein the duplicating unit duplicates a first frame of the image data when the non-overlapping time zone is a time zone preceding the first time zone. 5. The file editing apparatus according to claim 3, wherein the duplicating unit duplicates the last frame of the image data when the non-overlapping time zone is a time zone that is delayed from the first time zone. A discriminating means for discriminating whether or not the difference between the start time of the first time zone and the start time of the second time zone falls below a reference;
When the discrimination result of the discrimination means is negative, the designation means for designating another second file for the detection process of the second detection means, and the first when the discrimination result of the discrimination means is affirmative 6. The file editing apparatus according to claim 1, further comprising an activation unit that activates an addition unit and / or the second addition unit. In the processor of the file editing device,
A first detection step of detecting, as a first time period, a time period for capturing image data stored in the first file;
A second detection step of detecting, as a second time period, a time period for capturing audio data stored in the second file;
A first addition step of adding reference image data to the first file corresponding to a non-overlapping time zone that does not overlap with the first time zone in the second time zone, and audio data stored in the second file A file editing program for executing a second addition step of adding to the first file corresponding to an overlapping time zone between the first time zone and the second time zone. A file editing method executed by a file editing device,
A first detection step of detecting, as a first time period, a time period for capturing image data stored in the first file;
A second detection step of detecting, as a second time period, a time period for capturing audio data stored in the second file;
A first addition step of adding reference image data to the first file corresponding to a non-overlapping time zone that does not overlap with the first time zone in the second time zone, and audio data stored in the second file A file editing method comprising: a second adding step of adding to the first file corresponding to an overlapping time zone between the first time zone and the second time zone.

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