JP2009207043A - Moving-image reproducing apparatus, animation reproducing method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a user to securely confirm a voice recorded in an animation, even when a portable device is used outdoors to reproduce the animation recoded with the voice. <P>SOLUTION: A CPU 24 stops an audio output from a speaker 27 when a first audio waveform-display mode is selected after an animation file to be reproduced is selected, and displays on an LCD 14 the audio waveform based on audio data together with the animation based on video data. The audio waveform V2 based on the audio data is shifted in the futural direction of the temporal axis together with the animation based on the video data if some time lag exists both in the image and the voice, based on a focal-distance information on imaging and it is displayed on the LCD 14. Further, the image corresponding to the audio data including a selected sound region is reproduced, when the audio waveform is developed into an audio spectrum and the sound region according to the audio spectrum is selected by the user. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a moving image reproducing apparatus, a moving image reproducing method, and a program for reproducing a moving image file including audio data.

  2. Description of the Related Art Conventionally, there has been proposed a multimedia document creation apparatus that displays audio data as an audio waveform together with the image data when reproducing the image data (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 9-277749

  By the way, in a mobile device such as a video camera or a digital still camera, there is a case where a moving image with sound acquired by the own device is reproduced outdoors for confirmation. However, in this case, the user may not be able to hear the reproduced voice because of the surrounding noise. In addition, for example, when a moving image with sound is reproduced in a public facility such as a train, it may be annoying to other passengers, and it may be difficult to reproduce the sound. In the above-mentioned Patent Document 1, it is disclosed that audio data is displayed in a waveform, but no reproduction method in consideration of the surrounding environment is disclosed.

  Accordingly, an object of the present invention is to provide a moving image reproducing apparatus, a moving image reproducing method, and a program that allow a user to confirm the state of audio output synchronized with a moving image to be reproduced regardless of the surrounding environment.

  In order to achieve the above object, a moving picture reproducing apparatus according to the first aspect of the present invention includes a display unit that displays an image based on image data included in a moving picture file, and an audio output that outputs sound based on the audio data included in the moving picture file. Means, setting means for setting a predetermined video playback mode, audio stop means for stopping audio output by the audio output means when the predetermined video playback mode is set, and the predetermined video playback mode Display control means for causing the display means to display a sound index that is a sound-related index based on the sound data.

  Further, as a preferred aspect, for example, as in claim 2, in the video playback device according to claim 1, the audio index is a correspondence relationship between a playback time of the video file and a volume of audio based on the audio data. It is the waveform which shows.

  Further, as a preferred aspect, for example, as described in claim 3, in the moving image reproduction device according to claim 2, based on the distance information included in the moving image file, the time when the subject image is recorded and the sound emitted by the subject are calculated. The display control means includes a calculation means for calculating a time lag that is a recorded time lag, and the sound control indicator displayed on the display means is the time corresponding to the time lag calculated by the calculation means. The display is moved and displayed on the time axis indicating the reproduction time.

  Further, as a preferred aspect, for example, as in claim 4, in the moving picture reproducing apparatus according to claim 1, the sound index indicates a correspondence relationship between a frequency of a sound signal based on the sound data and a signal intensity. It is a waveform.

  Further, as a preferable aspect, for example, as described in claim 5, in the moving image playback device according to claim 4, audio information determined by a relationship between a specific frequency and a specific signal strength with respect to the audio index. The display unit includes a designating unit that designates a certain range, and the display unit displays only the image data associated with the audio data including the range designated by the designating unit.

  In order to achieve the above object, a moving image reproduction method according to a sixth aspect of the present invention includes a display unit that displays an image based on image data included in a moving image file, and an audio output that outputs sound based on audio data included in the moving image file. A video playback method for a portable device comprising: a setting step for setting a predetermined video playback mode; and when the predetermined video playback mode is set, audio output by the audio output unit is stopped An audio stop step; and a display control step of causing the display means to display an audio index, which is an index related to audio based on the audio data, when the predetermined moving image playback mode is set.

  In order to achieve the above object, a program according to a seventh aspect of the invention includes a display unit that displays an image based on image data included in a moving image file, and an audio output unit that outputs sound based on audio data included in the moving image file. A setting means for setting a predetermined video playback mode, a voice stop means for stopping audio output by the voice output means when the predetermined video playback mode is set, and the predetermined computer When the moving image reproduction mode is set, the display unit is made to function as a display control unit that displays an audio index, which is an index related to audio based on the audio data, on the display unit.

  According to the present invention, sound output is stopped, and when image data is displayed, an index indicating sound based on the sound data stored in association with the displayed image data is displayed. Since it did in this way, even when it is a case where a moving image with an audio | voice is reproduced | regenerated using a portable apparatus outdoors, the advantage that a user can confirm the audio | voice accompanying an animation is acquired reliably.

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

A. Configuration of Embodiment FIG. 1 is a block diagram showing a configuration of a portable digital camera according to an embodiment of the present invention. In the figure, a lens block 10 is composed of a plurality of optical lens groups, and forms an image on a CCD 11. The CCD 11 forms a subject image (image), and converts the intensity of light of each color of RGB into a current value. The CDS / AD 12 converts the video signal from the CCD 11 into a digital signal and supplies it to the image processing unit 13. The image processing unit 13 performs image processing such as white balance processing, color processing, gradation processing, outline emphasis, and gamma correction, and supplies the processed image data to the RAM via the LCD 14 and the bus. The LCD 14 is a liquid crystal display, and displays an image from the CCD 11 (through display), an image after shooting stored in the RAM, and the like. BL15 is a backlight and is installed on the back surface of the LCD.

  The motor 16 drives the lens block in order to perform focusing or zooming. The motor driver 17 drives the motor 16. The vertical / horizontal driver 18 scans the CCD 11. The strobe 19 emits light during shooting. The TG 20 is a timing generator, which generates timing signals for controlling the operations of the motor driver 17, the vertical / horizontal driver 18, and the strobe 19 and supplies them to each unit.

  The external memory 21 records a plurality of moving image files including moving image data (data composed of a plurality of still image data) and audio data output in synchronization with the reproduction of the moving image data. The external memory 21 is a removable recording medium such as a compact flash (registered trademark), a memory stick, and an SD card. The RAM 22 stores various data associated with the operation of the CPU, which will be described later. The flash memory 23 is a built-in memory that holds captured images. The flash memory 23 stores a predetermined program for operating the CPU 24. The CPU 24 controls the entire digital camera (moving image playback apparatus) based on the program. In particular, in the present embodiment, when a predetermined video playback mode is selected, the CPU 24 displays the characteristics of the audio data included in the video file (audio waveform indicating the volume) in synchronization with the playback of the video data. Control as follows. The audio processing unit 25 digitally converts the audio signal from the microphone 26 into audio data at the time of shooting, and converts the audio data included in the moving image file into analog data at the time of moving image reproduction and outputs it from the speaker 27.

  The key input unit 28 includes a recording / playback mode switching key, a cross key, a menu key, and the like. The battery 29 is a rechargeable secondary battery. The power supply 30 stabilizes the output voltage of the battery 29 and supplies power to each unit. The microcomputer 31 discriminates the key input of the key input unit 28, controls the remaining amount of the battery 29, and controls the power supply of the power source 30 by the power on / off operation. The CPU 24 and the microcomputer 31 can exchange data with each other.

B. Operation of Embodiment Next, the operation (moving image reproduction operation) of the above-described embodiment will be described.

B-1. First Operation Example First, a first operation example of this embodiment will be described.
FIG. 2 is a flowchart for explaining a first operation example of the digital camera according to the present embodiment. When the user operates a menu key or the like provided in the key input unit 28 after turning on the power, the CPU 24 reads the program from the flash memory 23 and operates in accordance with the program, as shown in the flowchart of FIG. The process is executed as follows. First, a moving image file to be reproduced is selected (step S10). The moving image file is selected by displaying a list of stored moving image files on the LCD 14 and selecting the moving image file in response to the user's operation of the key input unit 28. Next, the selected moving image file is read from the external memory 21. Next, in response to the user's operation of the switching key or the like in the key input unit 28, the moving image playback mode is selected (step S12), and it is determined whether the first audio waveform display mode is selected or the normal playback mode is selected. (Step S14).

  When the first audio waveform display mode is selected, the first audio waveform display mode is set as the moving image reproduction mode. Next, it is determined whether or not sound is being output from the speaker 27 (step S16). If sound is being output from the speaker 27 (step S16; YES), the sound output from the speaker 27 is stopped. (Step S18). Since the sound is always output from the speaker 27 in the normal playback mode described later, when the set video playback mode is switched to the first audio waveform display mode during playback of the video file in the normal playback mode, The audio output from the speaker 27 is stopped. On the other hand, if no sound is being output from the speaker 27 (step S16; NO), the process proceeds to the next.

  In any case, as shown in FIG. 3, the audio waveform based on the audio data is synchronized with the frames that are sequentially displayed in accordance with the progress of the reproduction of the moving image data after the first audio waveform display mode is set. V1 is displayed on the monitor (LCD 14) (step S20). The audio waveform V1 is a waveform indicating the volume based on the audio data along the elapsed playback time, and is an index indicating the characteristics of the audio. In the audio waveform V1, the horizontal axis is a time axis V11 indicating elapsed playback time, and the vertical axis is a volume axis V12 indicating volume. A position where the time axis V11 and the volume axis V12 intersect on the time axis V11 is a position indicating the current playback elapsed time. Thereafter, it is determined whether or not the reproduction of the moving image file has ended (step S28). If the reproduction of the moving image file has not ended (step S28; NO), the process returns to step S12 and the above-described processing is repeated. On the other hand, if the reproduction of the moving image file ends (step S28; YES), the process ends.

  When the normal playback mode is selected, the normal playback mode is set as the moving image playback mode. Next, it is determined whether or not the audio waveform V1 is being displayed on the monitor (LCD 14) (step S22). If the audio waveform V1 is being displayed on the monitor (LCD 14) (step S22; YES), The displayed voice waveform V1 is erased (step S24). In the first audio waveform display mode, since the audio waveform V1 is always displayed on the monitor (LCD 14), the set video playback mode is switched to the normal playback mode during playback of the video file in the first audio waveform display mode. When it is changed, the voice waveform V1 on the monitor (LCD 14) is deleted.

  On the other hand, when the audio waveform V1 is not displayed on the monitor (LCD 14) (step S22; NO), the process proceeds to step S26. In any case, after the normal playback mode is selected, the moving image data is played back on the monitor (LCD 14), and the sound based on the audio data is output from the speaker 27 in synchronization with the progress of the playback (step S26). Thereafter, it is determined whether or not the reproduction of the moving image file has ended (step S28). If the reproduction of the moving image file has not ended (step S28; NO), the process returns to step S12 and the above-described processing is repeated. On the other hand, when the reproduction of the moving image file ends (step S28; YES), the CPU 24 ends the operation based on the flowchart shown in FIG.

  According to the first operation example described above, when the first voice waveform display mode is set, the voice output is stopped and the voice waveform V1 is displayed. Therefore, if the first audio waveform display mode is set, the user can be surely confirmed the audio status of the moving image being reproduced without being influenced by the surrounding environment.

  In addition, when switching from the mode that displays the index indicating the characteristics of the audio to the normal playback mode during playback of the video file, this index is deleted and the audio based on the audio data is output. It is possible to obtain an effect that the index does not become an obstacle to the reproduced moving image data even during normal reproduction.

B-2. Second Operation Example Next, a second operation example of the present embodiment will be described.
In general, when shooting a distant subject, the sound emitted from the subject is collected by the microphone 26 later than the time when the subject image is formed by the CCD 11. For this reason, the timing at which recording of a frame including the subject image begins to deviate from the timing at which recording of sound generated by the subject begins. Therefore, when playing back a moving image file obtained by shooting a distant subject, the timing at which the frame including the subject image starts to be displayed and the timing at which the sound produced by the subject starts to be output are shifted. Will feel uncomfortable. Therefore, the second operation example is intended to eliminate this uncomfortable feeling.

  FIG. 4 is a conceptual diagram for explaining the structure of a moving image file obtained by photographing fireworks 41 as a distant subject. In general, when a distant firework is photographed by a digital camera, the explosion sound of the firework is collected by the microphone 26 after the time when the firework image is formed by the CCD 11. In the example shown in FIG. 4, the time axis of each frame (image of the fireworks 41) F1, F2,... Fn-1, Fn, Fn + 1 of the recorded moving image data and the volume of the explosion sound of the fireworks 41. The correspondence on V41 is shown. A time axis V41 indicates an elapsed shooting time when the fireworks 41 is shot with a digital camera and is set to the right. The frame F1 is the first frame photographed first on the time axis V41, and the frame Fn + 1 is the n + 1th frame photographed last on the time axis V41.

  That is, the frames are recorded on the digital camera in time order of F1, F2,... Fn-1, Fn, Fn + 1. A frame F2 in which the moment when the fireworks 41 emits explosive sound is imaged is recorded. The frame Fn is recorded at a time lag of about 2 seconds after the frame F2 is recorded. FIG. 4 shows an image in which the fireworks 41 are launched in the frame F1, and an image in which the fireworks 41 explodes and gradually spreads in the frame F2. Actually, an explosion sound of the fireworks 41 is emitted at the time when the frame F2 is recorded. However, since there is a suitable distance between the fireworks 41 and the digital camera (user) who photographed the fireworks, the explosion sound of the fireworks is recorded at the time when the frame Fn is recorded.

  FIG. 5 is a flowchart for explaining a second operation example of the digital camera according to the present embodiment. When the user operates a menu key or the like provided in the key input unit 28 after turning on the power, the CPU 24 reads the program from the flash memory 23 and operates according to the program, as shown in the flowchart of FIG. The process is executed as follows. First, a moving image file to be reproduced is selected (step S30). The selection of the moving image file is performed by displaying a list of stored moving image files on the LCD 14 and selecting from the list. In the second operation example, the moving image file whose configuration is shown in FIG. 4 is selected. When the moving image file is selected, next, the moving image reproduction mode is selected (step S32), and it is determined whether the second audio waveform display mode is selected or the normal reproduction mode is selected (step S34).

  When the second audio waveform display mode is selected, the second audio waveform display mode is set as the moving image reproduction mode. Next, it is determined whether or not sound is being output from the speaker 27 (step S36). If sound is being output from the speaker 27 (step S36; YES), the sound output from the speaker 27 is stopped. (Step S38). On the other hand, if no sound is being output from the speaker 27 (step S36; NO), the process proceeds to step 40. In any case, as shown in FIG. 6, the audio waveform V2 based on the audio data is synchronized with the frames that are sequentially displayed as the moving image data is reproduced after the second audio waveform display mode is set. Is displayed on the monitor (LCD 14) (step S40). The audio waveform V2 is a waveform indicating the volume based on the audio data along the elapsed playback time, and is an index indicating the characteristics of the audio. In this audio waveform V2, the horizontal axis is a time axis V21 indicating the elapsed playback time, and the vertical axis is a volume axis V22 indicating the volume. On the time axis V21, a position where the time axis V21 and the volume axis V22 intersect is a position indicating the current playback elapsed time.

  Here, in step S40, focal length information (distance information between the digital camera and the subject when the subject is in focus) attached to the moving image file in the Exif format or the like is obtained between the digital camera and the subject at the time of shooting. Read as distance information. Then, by dividing the distance based on the read distance information by the sound speed (340 m / s), a time lag that is a time indicating a difference between the timing at which the subject image is recorded and the timing at which the sound generated by the subject is recorded is obtained. calculate. In the moving image file whose structure is shown in FIG. 4, this time lag is about 2 seconds as described above. Then, on the time axis V21, the voice waveform V2 is moved leftward by an amount corresponding to the calculated time lag and displayed on the monitor (LCD 14). Thereafter, it is determined whether or not the reproduction of the moving image file has ended (step S48). If the reproduction of the moving image file has not ended (step S48; NO), the process returns to step S32 and the above-described processing is repeated. On the other hand, when the reproduction of the moving image file ends (step S48; YES), the process ends.

  When the normal playback mode is selected as the moving image playback mode, the normal playback mode is set as the moving image playback mode. Next, it is determined whether or not the audio waveform V2 is displayed on the monitor (LCD 14) (step S42). If the audio waveform V2 is displayed, the audio waveform V2 is deleted (step S44). On the other hand, if the voice waveform V2 is not displayed on the monitor, the process proceeds to the next. In any case, after the normal playback mode is selected, the moving image data is played back on the monitor (LCD 14), and the sound based on the audio data is output from the speaker 27 in synchronization with the progress of the playback (step S46). Thereafter, it is determined whether or not the reproduction of the moving image file has ended (step S48). If the reproduction of the moving image file has not ended (step S48; NO), the process returns to step S32 and the above-described processing is repeated. On the other hand, if the reproduction of the moving image file ends (step S48; YES), the CPU 24 ends the process based on the flowchart shown in FIG.

  According to the second operation example described above, the speech waveform V2 is moved on the time axis V21 by the calculated time lag. Thus, the temporal relationship between the timing of reproducing the moving image data and the timing of outputting the audio data at the time of reproduction is based on the timing of the operation (explosion) of the subject (fireworks 41) at the time of shooting and the sound of the subject (explosive sound). Therefore, it is possible to eliminate a sense of incongruity that the user has.

B-3. Third Operation Example Next, a third operation example of the present embodiment will be described.
In the third operation example, as in the first and second operation examples described above, a sound waveform (a sound spectrum in the third operation example) is displayed together with the moving image. Is specified, a frame associated with the audio data including the specified range is searched and reproduced.

  7 and 8 are flowcharts for explaining a third operation example of the digital camera according to the present embodiment. When the user operates a menu key or the like provided in the key input unit 28 after turning on the power, the CPU 24 reads out the program from the flash memory 23 and operates in accordance with the program, thereby performing the operations shown in FIGS. Processing is executed as shown in the flowchart. First, a moving image file to be reproduced is selected (step S50). The selection of the moving image file is performed by displaying a list of stored moving image files on the LCD 14 and selecting from the list. When the moving image file is selected, next, a moving image reproduction mode is selected (step S52), and it is determined whether the third audio waveform display mode is selected or the normal reproduction mode is selected (step S54).

  When the third audio waveform display mode is selected, the third audio waveform display mode is set as the moving image reproduction mode. Next, it is determined whether or not sound is being output from the speaker 27 (step S56). If sound is being output from the speaker 27 (step S56; YES), the sound output from the speaker 27 is stopped. (Step S58). On the other hand, if no sound is being output from the speaker 27 (step S56; NO), the process proceeds to the next. In any case, with respect to the frame after the selection of the third audio waveform display mode, as shown in FIG. 9, the audio spectrum V3 based on the audio data is started to be displayed on the monitor (LCD 14) together with the moving image based on the image data (step S60). ), It is determined whether or not a sound range selection input for the sound spectrum has been detected (step S62).

  Here, in the audio spectrum V3, the horizontal axis is the frequency axis V31 indicating the frequency of the audio signal based on the audio data, and the vertical axis is the power axis V32 indicating the signal intensity of the audio signal based on the audio data. As shown in FIG. 9, the user moves the frequency selection cursor C1 and the power selection cursor C2 with the cross key of the key input unit 28, and is displayed on the monitor (LCD 14) at any timing during moving image reproduction. The desired sound range V33 is specified from the voice spectrum. That is, the sound range V33 is determined by the correspondence between the frequency designated by the cursors C1 and C2 and the signal intensity, and is an index indicating the characteristics (frequency and signal intensity) of the sound.

  Then, when the selection input of the sound range for the sound spectrum by the user is detected, as shown in FIG. 10, only the frame associated with the sound data including the selected sound range is reproduced (step S64). Specifically, this processing is performed for frames in the playback time of the moving image file after the time point when the range selection is detected. In the illustrated example, only the frames F2 and F3 associated with the audio data including the sound range selected by the user are reproduced from the frames F1 to F4 of the moving image file being reproduced (actually, more The corresponding frame is played). Thereafter, it is determined whether or not the reproduction of the moving image file has been completed (step S72). If the reproduction of the moving image file has not been completed (step S72; NO), the process returns to step S52 and the above-described processing is repeated. On the other hand, if the reproduction of the moving image file ends (step S72; YES), the process ends.

  On the other hand, when the selection input of the sound range for the audio spectrum by the user is not detected, the moving image file is reproduced as usual, and it is determined whether or not the reproduction of the moving image file is finished (step S72). If not completed (step S72; NO), the process returns to step S52 and the above-described processing is repeated. On the other hand, if the reproduction of the moving image file ends (step S72; YES), the process ends.

  When the normal playback mode is selected, the normal playback mode is set as the moving image playback mode. Next, it is determined whether or not the audio waveform V3 is displayed on the monitor (LCD 14) (step S66). If the audio waveform V3 is displayed, the audio waveform V3 is deleted (step S68). On the other hand, if the voice waveform V3 is not displayed on the monitor, the process proceeds to the next. In any case, after the normal playback mode is selected, the moving image data is played back on the monitor (LCD 14), and the sound based on the audio data is output from the speaker 27 in synchronization with the progress of the playback (step S70). Thereafter, it is determined whether or not the reproduction of the moving image file has been completed (step S72). If the reproduction of the moving image file has not been completed (step S72; NO), the process returns to step S52 and the above-described processing is repeated. On the other hand, when the reproduction of the moving image file ends (step S72; YES), (step S72; YES), the CPU 24 ends the operation based on the flowchart shown in FIG.

  According to the third operation example described above, an image corresponding to the sound range designated by the user can be selectively reproduced.

  In the present embodiment, switching between the normal playback mode and the first to third audio waveform display modes is performed by detecting the user's selection operation. However, the microphone 26 is always used during playback in the normal playback mode. If ambient sound is acquired and the volume is equal to or higher than a predetermined value, the first to third sound waveform display modes are automatically switched, and conversely, the microphone 26 is used for reproduction in the first to third sound waveform display modes. If the volume of the acquired ambient environmental sound is equal to or lower than a predetermined value, the normal playback mode may be switched. By doing so, the user can confirm the audio output synchronized with the reproduction of the moving image without paying attention to the surrounding environment when reproducing the moving image.

The present invention is not limited to the digital camera described in the above-described embodiment, and is a mobile device having a video playback function, such as a mobile phone, a PDA (personal
The present invention can be applied to digital assistants, media content playback devices, and the like. The present invention is not limited to the above-described embodiment, and various design changes can be made without departing from the spirit of the present invention.

It is a block diagram which shows the structure of the digital camera by embodiment of this invention. 5 is a flowchart for explaining a first operation example of the digital camera according to the present embodiment. It is a schematic diagram which shows the example of a display in the 1st operation example of the digital camera by this embodiment. It is a conceptual diagram for demonstrating the time lag of the image | video and audio | voice at the time of image | photographing the far imaging | photography object. It is a flowchart for demonstrating the 2nd operation example of the digital camera by this embodiment. It is a schematic diagram which shows the example of a display in the 2nd operation example of the digital camera by this embodiment. It is a flowchart for demonstrating the 3rd operation example of the digital camera by this embodiment. It is a flowchart for demonstrating the 3rd operation example of the digital camera by this embodiment. It is a schematic diagram which shows the example of a display in the 3rd operation example of the digital camera by this embodiment. It is a schematic diagram which shows the example of a display in the 3rd operation example of the digital camera by this embodiment.

Explanation of symbols

10 Lens block 11 CCD
12 CDS / AD
13 Image processing unit 14 LCD
15 BL
16 Motor 17 Motor driver 18 Vertical / Horizontal driver 19 Strobe 20 TG
21 External memory 22 RAM
23 Flash memory 24 CPU
25 Audio Processing Unit 26 Microphone 27 Speaker 28 Key Input Unit 29 Battery 30 Power Supply 31 Microcomputer

Claims (7)

Display means for displaying an image based on the image data included in the video file;
Audio output means for outputting audio based on audio data included in the video file;
Setting means for setting a predetermined video playback mode;
Audio stop means for stopping audio output by the audio output means when the predetermined video playback mode is set;
And a display control means for causing the display means to display an audio index, which is an index related to audio based on the audio data, when the predetermined video playback mode is set.   2. The moving image reproducing apparatus according to claim 1, wherein the audio index is a waveform indicating a correspondence relationship between a reproduction time of the moving image file and a sound volume based on the audio data. Based on distance information included in the moving image file, comprising a calculating means for calculating a time lag which is a difference between the time when the subject image was recorded and the time when the sound emitted by the subject was recorded,
The display control means displays the voice index displayed on the display means by moving it on the time axis indicating the playback time by the time corresponding to the time lag calculated by the calculating means. The moving image reproducing apparatus according to claim 2.   2. The moving image reproducing apparatus according to claim 1, wherein the audio index is a waveform indicating a correspondence relationship between a frequency and an intensity of an audio signal based on the audio data. A designating unit that designates a sound range that is sound information determined by a relationship between the specific frequency and the specific signal strength with respect to the sound index,
The moving image reproducing apparatus according to claim 4, wherein the display control means causes the display means to display only the image data associated with the audio data including the sound range designated by the designation means. A video playback method for a mobile device comprising: display means for displaying an image based on image data contained in a video file; and audio output means for outputting audio based on audio data contained in the video file,
A setting step for setting a predetermined video playback mode;
An audio stop step for stopping audio output by the audio output means when the predetermined video playback mode is set;
And a display control step of causing the display means to display an audio index that is an index relating to audio based on the audio data when the predetermined video playback mode is set. A computer of a portable device comprising: display means for displaying an image based on image data included in a moving image file; and audio output means for outputting sound based on audio data included in the moving image file.
Setting means for setting a predetermined video playback mode;
Audio stop means for stopping audio output by the audio output means when the predetermined video playback mode is set;
Display control means for causing the display means to display an audio index, which is an index related to audio based on the audio data, when the predetermined video playback mode is set;
Program to function as.

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