JP2006005539A - Image and audio recording apparatus and reproduction apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital camera that can record and reproduce an image in cross-reference with an audio signal so as to attain effective visual presentation using photos. <P>SOLUTION: When an image capture request arrives while a memory card 27 continuously records sound picked up by a microphone 9, an image from an imaging element 22 is captured and recorded on the memory card 27 and also a synchronizing signal denoting a timing when the image is recorded is recorded. In the case of reproduction, the synchronizing signal is detected from the signal read from the memory card 27, and when the synchronizing signal is detected while the sound signal is continuously reproduced, a corresponding image is read from the memory card 27 and reproduced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention particularly relates to an image / audio recording apparatus and a reproduction apparatus suitable for performing an effective visual presentation using photographs.

  Visual presentations that use photos effectively are important for making listeners interested in the content of the presentation and providing the information they want to convey accurately and effectively. For example, when a product development engineer gives a presentation, he explains the background of the product development and shows photographs of experimental equipment and prototypes. Can effectively convey improvements to Conventionally, video cameras are used to create visual presentation materials using such photos.

Also, some digital still cameras can perform moving image recording and audio recording as disclosed in Patent Document 1, for example. It is conceivable to create a presentation using photos using such a digital camera.
JP 2004-153429 A

  However, a picture used for presentation is a still image, whereas a video camera shoots a moving image. For this reason, if a presentation material using photographs is created using a video camera, the same amount of data as that of moving image recording is used, and the recording capacity is wasted. In addition, when shooting a presentation using photos with a camcorder, you will shoot a still photo as a video, so take a picture with the camera firmly fixed on a tripod, etc. It is necessary to shoot to avoid blurring. Furthermore, with a video camera, the resolution of a still image is not as good as that of a still camera due to the restriction that a moving image is reproduced on a television screen.

  On the other hand, some digital still cameras can leave a comment on a captured image by voice. Such a function is called a voice memo. It is conceivable to use this voice memo to create a presentation material using photographs.

  However, the voice memo records a recorded image in association with the voice. On the other hand, in the case of a presentation, it is necessary to record an image in association with the sound in a continuous explanation by sound. In the case of a voice memo, it is not possible to record an image in association with the voice.

  In view of the above-described problems, the present invention provides an audio / video recording apparatus and a reproduction apparatus that can record and reproduce an image in association with audio so that an effective visual presentation using photographs can be performed. It is the purpose.

  In order to solve the above-described problem, the invention according to claim 1 is an image recording unit that records an image signal captured by an image sensor on a recording medium, and an audio recording unit that records an input audio signal on the recording medium. If there is an image capture request while recording audio signals continuously, it captures an image from the image sensor, records the image on a recording medium, and records a synchronization signal indicating the timing at which the image was recorded And a control means for controlling to do so.

  The invention according to claim 2 is characterized in that the synchronization signal is recorded in the lower bits of the audio signal.

  The invention according to claim 3 is characterized in that the synchronization signal is recorded in predetermined frequency information of the audio signal converted into the frequency domain.

  The invention according to claim 4 is characterized in that the synchronization signal is multiplexed and recorded on the audio signal.

  The invention according to claim 5 is characterized in that the synchronization signal is recorded in a synchronization file.

  The invention according to claim 6 is characterized in that the synchronization signal is a flag for identifying that an image has been recorded.

  The invention according to claim 7 is characterized in that the synchronization signal identifies that an image has been recorded and includes a sequential number of the captured image.

  The invention according to claim 8 is characterized in that a sequential number indicating the order of the captured images is counted and the sequential number is included in the image file name.

  The invention according to claim 9 is an image reproducing means for reproducing an image signal read from a recording medium, an audio reproducing means for reproducing an audio signal read from the recording medium, and a signal read from the recording medium. And a control means for controlling to read out the corresponding image from the recording medium and reproduce it when the synchronization signal is detected while the synchronization signal is detected and the audio signal is continuously reproduced. It is characterized by that.

  In the invention according to claim 10, the image file name includes a sequential number indicating the order of the captured images, and when a synchronization signal is detected, the recording medium is recorded in the order of the sequential numbers included in the image file name. An image is read out from the image and reproduced.

  In the invention according to the eleventh aspect, the synchronization signal includes a sequential number indicating the order of the captured images. When the synchronization signal is detected, the images are read from the recording medium in the order of the sequential numbers obtained from the synchronization signal. Is read and played back.

  According to the present invention, when recording is performed with the presentation recording mode set, if there is an image capture request while the audio signal is continuously recorded, the image from the image sensor is captured and stored in the recording medium. An image is recorded, and a synchronization signal indicating the timing at which the image is recorded is recorded. During reproduction, if a synchronization signal is detected while the audio signal is being reproduced continuously, the corresponding image is read from the recording medium and reproduced. As described above, in the present invention, when the presentation recording mode is set, an image can be recorded in association with audio in a continuous description by audio. Using these functions, you can make visual presentations that use photos effectively.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1. Appearance structure of digital camera.
1A and 1B are a front view and a rear view of a digital camera to which the present invention is applied. As shown in FIG. 1A, a lens barrel 2, an optical finder 3, and a strobe light emitting unit 4 are provided on the front surface 1 a of the camera body 1. A shutter key 5 is provided on the upper side 1b of the camera body 1.

  On the back surface 1c of the camera body 1, as shown in FIG. 1B, an optical finder 3, an LCD (Liquid Crystal Display) display 6, an operation unit 7, a speaker 8 for sound reproduction, and a sound recording speaker. A microphone 9 is provided. The microphone 9 is rotatably attached to the back surface 1c of the camera body 1. The microphone 9 can be inverted from the camera body 1 only during recording, and the microphone 9 can be folded when not in use.

  In the digital camera to which the present invention is applied, the presentation recording mode can be set in addition to the normal shooting mode. In the presentation recording mode, an audio signal input from the microphone 9 is continuously recorded, and when the shutter key 5 is pressed during that time, an image at that time is recorded in association with the audio. The mode can be set by operating the operation unit 7.

  In addition, when playback is set in the presentation recording mode, the recorded sound is played back continuously, and if there is an image recorded in association with the sound, the image is played back at that timing. The

  That is, in the presentation recording mode, as shown in FIG. 2A, when continuous sound is input, the sound is continuously recorded. As shown in FIG. 2 (B), when the shutter key 5 is pressed at time t1 while recording the sound continuously as described above, the image P1 (FIG. 2 (C)) at that time is related to the sound. Recorded. When the shutter key 5 is pressed at time t2, the image P2 at that time is recorded in association with sound, and when the shutter key 5 is pressed at time t3, the image P3 at that time is recorded in association with sound. Is done. When an image is recorded, a synchronization signal indicating the timing at which the image is recorded is recorded as will be described later.

  At the time of reproduction, as shown in FIG. 3A, the sound is reproduced continuously. Then, as shown in FIG. 3B, at time t1, an image P1 corresponding to the sound (FIG. 3C) is displayed, and at time t2, an image P2 corresponding to the sound is displayed. At time t3, an image P3 corresponding to the sound is displayed. The timing for reproducing the image is detected by a synchronization signal.

  As described above, in the digital camera to which the present invention is applied, when the presentation recording mode is set, images can be recorded in association with the sound in the continuous explanation by the sound. Using these functions, you can make visual presentations that use photos effectively.

2. Internal configuration of digital camera.
FIG. 4 is a block diagram showing an internal configuration of a digital camera to which the present invention is applied. In FIG. 4, the optical system 21 is composed of optical elements such as a lens and an iris. The subject image light via the optical system 21 is imaged on the light receiving surface of the image sensor 22. In a camera that is small and lightweight, a single-focus lens is used. In general, the lens is provided with an autofocus mechanism. Some lens units have an optical zoom mechanism.

  The image sensor 22 photoelectrically converts subject image light imaged on its light receiving surface. As the image sensor 22, a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary MOS) image sensor is used. Color filters are arranged on the front surface of the image sensor. The arrangement of the color filters includes R (red), G (碧), and B (blue) primary color filters, and Cy (cyan), Mg (magenta), and Ye (yellow) complementary color filters. May be used.

  At the time of shooting, an image for one frame is captured by the image sensor 22. The output of the image sensor 22 is supplied to an A / D (Analog to Digital) converter 24 via a sample hold and AGC (Automatic Gain Control) circuit 23 and digitized by the A / D converter 24. An output signal of the A / D converter 24 is supplied to the image signal processing circuit 25.

  The image signal processing circuit 25 performs image processing such as color temperature adjustment, gamma correction, and edge enhancement on the image signal from the image sensor 22. The image signal processing circuit 25 converts the resolution of the image data to a designated resolution and performs a process of compressing and encoding the image data. For example, JPEG (Joint Photographic Experts Group) is used as the image data compression method. JPEG is an ISO (International Organization for Standardization) / ITU (International Telecommunication Union) standard for compressing images using DCT (Discrete Cosine Transform). Note that the image data compression method is not limited to JPEG. Further, the image data may be recorded without being compressed.

  The compression-encoded image signal is supplied to the memory card 27 via the memory controller 26 and is recorded on the memory card 27 as an image file. The memory card 27 is a card-type detachable memory using a flash memory. In this example, a memory card is used as a recording medium, but the present invention is not limited to this. You may record on a built-in non-volatile memory, or you may record on a magnetic tape, a magnetic disk, an optical disk, etc.

  At the time of image reproduction, the image file in the memory card 27 is opened and image data is read out. The image data read from the memory card 27 is sent to the image signal processing circuit 25. The image signal processing circuit 25 performs image expansion processing and decodes the image signal. The decoded image signal is supplied to the LCD display 6 via the LCD driver 33, and a reproduced image is displayed on the LCD display 6.

  The LCD display 6 is used as an electronic viewfinder or the like at the time of shooting. In addition, various setting states and operation states are displayed on the LCD display.

  When recording audio, the audio signal from the microphone 9 is supplied to the A / D converter 31, and the audio signal is digitized by the A / D converter 31. This digital audio signal is supplied to the encoder 32. The audio signal is compression encoded by the encoder 32. MP3 (MPEG1 Audio Layer-3) is used as the audio data compression method. Note that the audio data compression method is not limited to MP3. Further, the audio data may be recorded without being compressed. The compressed audio signal is sent to the memory card 27 via the memory controller 26 and is recorded on the memory card 27 as an audio file.

  At the time of audio reproduction, the audio file in the memory card 27 is opened and audio data is read out. The audio data read from the memory card 27 is sent to the decoder 35. The decoder 35 performs an audio expansion process and decodes the audio signal. The decoded audio signal is converted into an analog signal by the D / A converter 36 and output from the speaker 8.

  A CPU (Central Processing Unit) 41 controls the entire digital camera. An input unit 42 is provided for the CPU 41. The input unit 42 receives input from the user and includes keys arranged on the shutter key 5 and the operation unit 7. The ROM 44 stores a control program. The RAM 43 is used as a work area.

  In the digital camera to which the present invention is applied, the presentation recording mode can be set in addition to the normal shooting mode. In the presentation recording mode, the audio signal input from the microphone 9 is continuously recorded on the memory card 27. The recording may be started at the same time as the presentation recording mode, or another user interface may be provided to instruct the start. When the presentation recording mode is set, when the shutter key 5 is pressed while the audio signal input from the microphone 9 is continuously recorded, a capture request is generated and an image from the image sensor 22 is captured. And recorded on the memory card 27, a synchronization signal indicating the timing of recording the image is generated, and the synchronization signal is recorded. From this synchronization signal, it can be seen that an image related to sound is recorded.

  At the time of reproduction, the audio file is opened from the memory card 27, and the audio is continuously reproduced. The detection of the synchronization signal is performed during the reproduction of the continuous sound. When a synchronization signal is detected, the image is read from the memory card 27 and reproduced at that timing.

3. About the sync signal.
As described above, in the digital camera to which the present invention is applied, when the presentation recording mode is set, when the shutter key 5 is pressed during recording, an image from the image sensor 22 is captured and stored in the memory card 27. In addition to recording, a synchronization signal indicating the timing at which the image is recorded is generated. This synchronization signal will be described below.

  The synchronization signal is used to identify the timing at which an image is recorded, and may be a 1-bit flag in the simplest case. Further, the timing at which the image is recorded may be identified in the synchronization signal, and for example, the sequential number of the image file may be recorded. Furthermore, various information may be recorded in the synchronization signal.

As a method for recording the synchronization signal, the following can be considered.
(1) A synchronization signal is recorded in the lower bits of the audio signal.
(2) A synchronization signal is recorded in predetermined frequency information of the audio signal converted into the frequency domain.
(3) Audio signals and synchronization signals are multiplexed and recorded.
(4) A separate file for synchronization is provided, and a synchronization signal is recorded in this separate file for synchronization.

  FIG. 5 shows the recording of the synchronization signal in the lower bits of the audio signal. As shown in FIG. 5, the output of the A / D converter 31 that digitizes the audio signal is sent to the encoder 32. At this time, the output of the least significant bit of the A / D converter 31 is not used, but instead, the output of the switch circuit 50 is supplied to the encoder 32. The switch circuit 50 is normally set to L level, for example, and is set to H level at the timing of recording an image. Thereby, the least significant bit of the audio signal becomes a synchronization signal. At the time of reproduction, the synchronization signal is detected by detecting the least significant bit of the audio signal.

  FIG. 6 shows a method of recording a synchronization signal in predetermined frequency information of an audio signal converted into the frequency domain. For example, when recording an audio signal, the encoder 32 compresses and encodes the audio signal. When compressing and encoding an audio signal, for example, as shown in FIG. 6, a DCT (Discrete Cosine Transform) conversion circuit 51 converts a time domain signal TD into a frequency domain signal FD. Predetermined data in the signal FD converted to the frequency domain is used as a synchronization signal. At the time of reproduction, a synchronization signal is detected by detecting data in a predetermined frequency region.

  FIG. 7 shows a method for multiplexing and recording audio signals and synchronization signals. As shown in FIG. 7, a synchronization signal generation circuit 52 that generates a synchronization signal of a specific pattern is provided, and the output of the A / D converter 31 and the output of the synchronization signal generation circuit 52 are multiplexed to the encoder 32. A supply multiplexer 53 is provided. During normal recording, the audio signal from the A / D converter 31 is supplied to the encoder 32. At the timing of recording an image, a synchronization signal is generated from the synchronization signal generation circuit 52, and the audio signal from the A / D converter 31 and the synchronization signal from the synchronization signal generation circuit 52 are multiplexed and supplied to the encoder 32. The At the time of reproduction, a synchronization signal is detected by detecting a signal of a predetermined pattern.

  FIG. 8 shows a method of providing another file for synchronization. In addition to the audio file and the image file, a synchronization file 55 for recording a synchronization signal is provided. In the synchronization file 55, as shown in FIG. 8, a time code 56 indicating the recording timing of the image is recorded. Note that the file name and sequential number of the image file may be recorded in the synchronization file 55 together with the time code 56 indicating the timing of recording the image. At the time of reproduction, the synchronization file 55 is opened, and the timing at which the image is recorded is detected from the time code 56.

  The method of recording the synchronization signal in the lower bits of the audio signal shown in FIG. 5 can record the synchronization signal regardless of the audio recording format. Since the information of the lower bits is discarded, the sound quality is deteriorated. However, when only the least significant bit is used, the deterioration of the sound quality is slight and hardly causes a problem in terms of hearing.

  In the method of recording the synchronization signal in the predetermined frequency information of the audio signal converted into the frequency domain shown in FIG. 6, since specific frequency information is discarded, the sound quality is affected. In this case, if a signal in a high frequency region is used as a synchronization signal, a problem in hearing is unlikely to occur.

  As described above, when a synchronization signal is recorded in an audio file, a marker indicating that the file has been recorded in the presentation recording mode may be attached. For example, the marker may be written in a file header. A special file name or identifier may be given. The method for recording the synchronization signal is not limited to this, and other methods may be used.

4). Explanation of operation when flag is used as synchronization signal.
FIG. 9 is a flowchart illustrating an example of processing when recording is performed with the presentation recording mode set. In this example, a flag for identifying the timing at which an image is recorded is used as the synchronization signal.

  In FIG. 9, when the start of recording in the presentation recording mode is instructed (step S1), the sequential number N of the image file is initialized to “1” (step S2). Then, an audio file is created (step S3). The file name of the audio file at this time may be any file name. Normally, an MP3 compressed audio file is appended with “MP3” as an extension. Then, the sound from the microphone 9 is recorded (step S4).

  While recording, it is determined whether there is a capture request (step S5). The capture request is generated when the shutter key 5 is pressed while recording is continued. If there is no capture request, it is determined whether or not the end of recording in the presentation recording mode is instructed (step S6). If the end of the presentation recording mode is not instructed, the process returns to step S4 and recording is continued.

  In the presentation recording mode, the user captures an image by recording the sound of the presentation and pressing the shutter key 5 in relation to the explanation of the sound. If the shutter key 5 is pressed while recording continues, it is determined in step S5 that there is a capture request.

  If it is determined in step S5 that there is a capture request, an image file is created (step S7). At this time, the file name of the image file is determined in association with the audio file. The file name of the image file includes the sequential number N of the image file. Normally, “JPG” is added as an extension for an image file compressed by JPEG.

  When the image file is created, a synchronization signal indicating the timing of recording the image is recorded (step S8). The synchronization signal associates audio data with the timing of capturing an image, and may be a 1-bit flag, for example. Then, an image pickup signal for one frame from the image pickup device 22 is captured, and this image pickup signal is compressed and recorded (step S9). When the image recording is completed, the file number N is incremented (step S10). Then, the process returns to step S4 and recording is continued.

  With the above processing, every time a capture request occurs, an image is captured and recorded, and a synchronization signal is recorded. The file name of the image file includes a sequential number N indicating the order in which the images are captured. Added.

  When ending the recording in the presentation recording mode, the user operates the operation unit 7 to instruct the end of the presentation recording mode. When the end of the presentation recording mode is instructed, the end of the presentation recording mode is detected in step S6, and the recording in the presentation recording mode is ended.

  FIG. 10 shows files left on the memory card 27 when recording is performed in the presentation recording mode. As shown in FIG. 10, when recorded in the presentation recording mode, an audio file 61 (ABCD.MP3) is left. A plurality of captured image files 62a, 62b, and 62c are left. If the file name of the audio file 61 is, for example, “ABCD.MP3”, the file names of the image files 62a, 62b, 62c are related to this, and include sequential numbers, for example, “ABCD — 001.JPG”, “ ABCD — 002.JPG ”and“ ABCD — 003.JPG ”.

  FIG. 11 shows the playback process in the presentation recording mode. In FIG. 11, when an instruction to start reproduction is given (step S21), a sequential number N is initialized (step S22). Then, an audio file is opened from the memory card 27 (step S23), and the audio is reproduced (step S24). For example, when a file as shown in FIG. 10 is recorded on the memory card 27, the “ABCD.MP3” of the audio file 61 is opened and this audio is reproduced.

  Then, it is determined whether or not a synchronization signal is detected (step S25). If a synchronization signal is detected in step S25, an image file including a sequential number N in the file name is opened (step S26). That is, for example, when a file as shown in FIG. 10 is recorded in the memory card 27, first, the image file having the file name “ABC — 001.JPG” of the image file 62a is opened. Then, this image is reproduced (step S27). Then, the sequential number N is incremented (step S28), the process returns to step S24, and the sound reproduction is continued.

  Hereinafter, similarly, while the sound reproduction is continued, it is determined whether or not the synchronization signal is detected in step S25. If the synchronization signal is detected, the image file having the Nth file name is detected in step S26. Is opened, the image is reproduced in step S27, the sequential number N is incremented in step S28, and the process returns to step S24. As a result, images (ABCD_001.JPG, ABCD_002.JPG, ABCD_003.JPG,...) Are sequentially reproduced in the order of the file number N at the timing when the synchronization signal is detected.

  When ending the reproduction, the user operates the operation unit 7 to instruct the end of the reproduction. When the end of playback is instructed, the end of playback is detected in step S29, and playback in the presentation recording mode ends.

5. Explanation of operation when sequential number is included in sync signal.
FIG. 12 is a flowchart showing another example of processing when recording is performed with the presentation recording mode set. In this example, a synchronization signal including a sequential number of an image file is used.

  In FIG. 12, when recording in the presentation recording mode is instructed (step S51), the sequential number N of the image file is initialized to “1” (step S52). Then, an audio file is created (step S53). Then, sound is recorded from the microphone 9 (step S54).

  During recording, it is determined whether there is a capture request (step S55). The capture request is generated when the shutter key 5 is pressed while recording is continued. If there is no capture request, it is determined whether or not the end of the presentation recording mode is instructed (step S56). If the end of the presentation recording mode is not instructed, the process returns to step S54 and recording is continued.

  In the presentation recording mode, the user captures an image by recording the sound of the presentation and pressing the shutter key 5 in relation to the explanation of the sound. If the shutter key 5 is pressed while recording is continued, it is determined in step S55 that there is a capture request.

  If it is determined in step S55 that there is a capture request, an image file is created (step S57). At this time, the sequential number N is included in the file name of the image file. Normally, “JPG” is added as an extension for an image file compressed by JPEG.

  When the image file is created, a synchronization signal indicating the timing when the image is recorded is recorded in the audio data (step S58). This synchronization signal includes the sequential number N of the image file. Then, an image pickup signal for one frame from the image pickup device 22 is taken in, and the image pickup signal is compressed and recorded (step S59). When the image recording is completed, the file number N is incremented (step S60). Then, the process returns to step S53, and recording is continued.

  With the above processing, every time a capture request occurs, an image is captured and recorded, and a synchronization signal is recorded. This synchronization signal includes a sequential number indicating the order in which the images are captured.

  When ending the recording in the presentation recording mode, the user operates the operation unit 7 to instruct the end of the presentation recording mode. When the end of the presentation recording mode is instructed, the end of the presentation recording mode is detected in step S56, and the recording in the presentation recording mode is ended.

  FIG. 13 shows playback processing in the presentation recording mode. In FIG. 13, when an instruction to start reproduction is given (step S71), an audio file is opened from the memory card 27 (step S72), and audio is reproduced (step S73).

  Then, it is determined whether or not a synchronization signal is detected during audio reproduction (step S74). When the synchronization signal is detected in step S74, the sequential number N is extracted from the synchronization signal (step S75), the image file with the extracted sequential number N is opened (step S76), and the image is reproduced (step S76). S77). Then, the process returns to step S73, and the sound reproduction is continued.

  Hereinafter, similarly, while the sound reproduction is continued, it is determined whether or not the synchronization signal is detected in step S74, and when the synchronization signal is detected, the sequential number N is extracted from the synchronization signal in step S75. In step S76, the image file having the Nth file name is opened, the image is reproduced in step S77, and the process returns to step S73. As a result, the images are sequentially reproduced in the order of the file number N at the timing when the synchronization signal is detected.

  When ending the reproduction, the user operates the operation unit 7 to instruct the end of the reproduction. When the end of playback is instructed, the end of playback is detected in step S78, and playback in the presentation recording mode ends.

  The present invention is not limited to the above-described embodiments, and various modifications and applications can be made without departing from the gist of the present invention. Further, according to the present invention, the presentation recording mode may be provided not only in a digital camera but also in a video camera.

  The present invention is particularly suitable for use in creating effective visual presentation material using photographs using a digital camera.

It is the front view and back view of a digital camera to which the present invention is applied. It is a timing diagram used for description at the time of recording of the digital camera to which the present invention is applied. It is a timing diagram used for description at the time of reproduction of the digital camera to which the present invention is applied. It is a block diagram which shows the internal structure of the digital camera to which this invention was applied. It is a block diagram which shows an example of recording of a synchronizing signal. It is a block diagram which shows the other example of recording of a synchronizing signal. It is a block diagram which shows the further another example of recording of a synchronizing signal. It is a figure which shows the further another example of recording of a synchronizing signal. It is a flowchart used for description of an example of recording in presentation recording mode. It is a figure used for description of a file. It is a flowchart used for description of an example of reproduction | regeneration in presentation recording mode. It is a flowchart used for description of the other example of recording in presentation recording mode. It is a flowchart used for description of the other example of reproduction | regeneration in presentation recording mode.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Camera body 2 Lens barrel 3 Optical finder 4 Strobe light emission part 5 Shutter key 6 LCD display 7 Operation part 8 Speaker 9 Microphone 21 Optical system 22 Image sensor 25 Image signal processing circuit 27 Memory card 32 Encoder 35 Decoder 42 Input unit

Claims (11)

Image recording means for recording an image signal captured by the image sensor on a recording medium;
Audio recording means for recording the input audio signal on a recording medium;
If there is an image capture request while recording an audio signal continuously, an image from the image sensor is captured, an image is recorded on the recording medium, and a synchronization signal indicating the timing at which the image is recorded is displayed. An audio / video recording apparatus comprising: control means for controlling to record.   2. The image / audio recording apparatus according to claim 1, wherein the synchronization signal is recorded in a lower bit of an audio signal.   2. The image / audio recording apparatus according to claim 1, wherein the synchronization signal is recorded in predetermined frequency information of an audio signal converted into a frequency domain.   The video / audio recording apparatus according to claim 1, wherein the synchronization signal is multiplexed and recorded on an audio signal.   2. The image / audio recording apparatus according to claim 1, wherein the synchronization signal is recorded in a synchronization file.   2. The audio / video recording apparatus according to claim 1, wherein the synchronization signal is a flag for identifying that an image has been recorded.   2. The image / audio recording apparatus according to claim 1, wherein the synchronization signal identifies that an image has been recorded and includes a sequential number of the captured image.   2. The image / audio recording apparatus according to claim 1, wherein a sequential number indicating the order of the captured images is counted, and the sequential number is included in an image file name. Image reproducing means for reproducing the image signal read from the recording medium;
Audio reproduction means for reproducing an audio signal read from the recording medium;
While the synchronization signal is detected from the signals read from the recording medium and the audio signal is continuously reproduced, if the synchronization signal is detected, the corresponding image is read from the recording medium and reproduced. And a control means for controlling the video and audio reproduction apparatus.   The image file name includes a sequential number indicating the order of the captured images. When the synchronization signal is detected, the images are read from the recording medium in the order of the sequential numbers included in the image file name and played back. The image / audio reproduction device according to claim 9, wherein the image / audio reproduction device is provided. The synchronization signal includes a sequential number indicating the order of the captured images. When the synchronization signal is detected, the images are read from the recording medium and reproduced in the order of the sequential number obtained from the synchronization signal. The video / audio reproduction device according to claim 9, which is configured as described above.

Images