JP2005057609A - Camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To preserve more images at the time of generation of a trigger signal without providing a large^capacity storage means. <P>SOLUTION: An imaging part 11 of a monitoring camera 1 is so configured that an image can be photographed to output image data, and a storage part 40 is provided for recording image data outputted from a photographing function part 10. A control part 30 has a function as a residual capacity detection part 31 and detects the residual storage capacity of the storage part 40. In the case that the residual capacity detection part 31 detects that the residual capacity of the storage part 40 is reduced to a prescribed value or smaller while moving image photographing at a prescribed frame rate is executed in the photographing function part 10, the control part 30 performs such control that recording processing is switched from moving image recording to still image recording. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a camera that can capture an image and store an electronic image.

  Conventionally, in a surveillance camera that detects an intruder or the like and records a moving image, the frame rate is increased when a trigger signal indicating that an intruder or the like has been detected is generated, and the frame rate is not generated when a trigger signal is not generated. Is known (for example, Patent Document 1).

JP 2002-262273 A

  However, in the conventional surveillance camera, when a trigger signal is frequently issued, a moving image with a high frame rate is frequently recorded, so that the storage capacity of the storage means for storing the moving image is satisfied relatively early. It will end up. Therefore, there is a problem that a moving image cannot be recorded even if a trigger signal is subsequently generated.

  In particular, if the first few trigger signals are due to false detection and the last trigger signal is an intruder detected, the conventional surveillance camera stores no video of the intruder based on the last trigger signal. A situation that cannot be preserved may occur.

  In order to solve this problem, it is conceivable to provide a large-capacity storage means such as a hard disk device in the surveillance camera. However, the surveillance camera is generally required to be downsized, and the large-capacity storage means is built in. This is a difficult situation in terms of design and cost.

  Therefore, the present invention has been made in view of the above problems, and provides a camera capable of storing more images when a trigger signal is generated without providing a large-capacity storage unit. It is intended.

  In order to achieve the above object, the invention described in claim 1 is a camera, which is an imaging means capable of capturing an image and outputting image data, and a storage means for storing image data obtained by the imaging means. And a detection means for detecting the remaining storage capacity of the storage means, and when the moving image shooting at a predetermined frame rate is being executed by the imaging means, the remaining storage capacity of the storage means is less than or equal to a predetermined value by the detection means And a control means for storing a still image in the storage means when it is detected that the image has been detected.

  According to a second aspect of the present invention, in the camera according to the first aspect, in the case where the control unit performs moving image shooting at a predetermined frame rate by the imaging unit, the detection unit stores the storage unit. When it is detected that the remaining storage capacity is equal to or less than the first value, the frame rate of the moving image is reduced and stored in the storage unit, and the remaining storage capacity of the storage unit is further reduced to the first value. The still image is stored in the storage means when it is detected that the second value is smaller than the second value.

  According to a third aspect of the present invention, in the camera according to the first or second aspect of the present invention, the camera according to the first or second aspect further includes an audio signal generation unit that acquires an audio and generates an audio signal in conjunction with a shooting operation by the imaging unit, When the control unit stores the still image in the storage unit, the control unit causes the storage unit to store an audio signal acquired at the time of shooting the still image together with the still image.

  According to the first aspect of the present invention, when moving image shooting at a predetermined frame rate is being executed by the image pickup means, it is detected by the detection means that the remaining storage capacity of the storage means has become a predetermined value or less. Sometimes, since the still image is stored in the storage means, it is possible to prevent the remaining storage capacity of the storage means from being lost at a relatively early stage. Therefore, an image corresponding to many trigger signals can be stored even when trigger signals are frequently issued without providing a large-capacity storage means.

  According to the second aspect of the present invention, when moving image shooting at a predetermined frame rate is being executed by the image pickup means, the remaining storage capacity of the storage means has become equal to or less than the first value by the detection means. Is detected, the frame rate of the moving image is decreased and stored in the storage means, and it is further detected that the remaining storage capacity of the storage means is equal to or less than the second value smaller than the first value. Sometimes, since the still image is stored in the storage unit, the amount of data stored in the storage unit can be reduced according to the stage where the remaining storage capacity of the storage unit decreases. Therefore, an image corresponding to more trigger signals can be stored.

  Furthermore, according to the third aspect of the invention, when the still image is stored in the storage unit, the audio signal acquired at the time of shooting the still image is stored in the storage unit together with the still image. Can be saved.

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

  FIG. 1 is a diagram illustrating a configuration of a monitoring camera 1 according to the present embodiment. The monitoring camera 1 always captures an image of a certain monitoring area as a moving image, and when a moving object (such as an intruder) is detected in the monitoring area based on the moving image obtained thereby, the moving object is detected. The images before and after being recorded are recorded and saved.

  As shown in FIG. 1, the surveillance camera 1 controls the imaging function unit 10 that captures an image of the monitoring area, the audio signal acquisition unit 20 that acquires an audio signal, the imaging function unit 10, and the audio signal acquisition unit 20. A control unit 30 and a storage unit 40 composed of a semiconductor memory or the like are provided.

  The imaging function unit 10 includes an imaging unit 11, an image compression unit 12, a ring buffer 13, a frame thinning unit 14, and a moving object detection unit 19.

  The imaging unit 11 photoelectrically converts a light image incident through a photographing lens to generate an electronic image. By continuously repeating the photographing operation, for example, 30 frames of moving images can be photographed per second. Is what you do. The moving image generated in the imaging unit 11 is given to each of the image compression unit 12 and the moving object detection unit 19.

  The image compression unit 12 compresses the image input from the imaging unit 11 in units of frames, and outputs an image for each frame to the ring buffer 13. The ring buffer 13 sequentially inputs frame images output from the image compression unit 12 and stores moving images of the past several seconds to several tens of seconds. Therefore, when a new frame image is input, the ring buffer 13 can always store the latest moving images for a plurality of frames by deleting the oldest frame image at that time.

  The moving object detection unit 19 sequentially inputs the moving images sequentially output from the imaging unit 11, and determines whether or not there is a moving object in the monitoring area based on the moving images continuous in time series. When a moving object is detected, a trigger signal indicating moving object detection is generated, and the trigger signal is supplied to the ring buffer 13. Therefore, this trigger signal corresponds to an abnormality detection signal indicating that an intruder or the like in the monitoring area has been detected.

  There are many known techniques for the method of detecting a moving object in the moving object detection unit 19, and any of them may be adopted. As an example, a difference image is generated by obtaining a difference value for each pixel between two frame images input in time series, and pixels in which the difference value is equal to or greater than a predetermined value are more than a certain threshold value. When many are included, it can be judged that a moving body exists.

  The ring buffer 13 temporarily stores a moving image input from the image compression unit 12 for a predetermined time, and in response to a trigger signal input from the moving body detection unit 19, the moving image before and after the trigger signal input is framed. The data is sent to the thinning unit 14. For example, a past image stored in the ring buffer 13 before the trigger signal is generated (a fixed time of several seconds to several tens of seconds) and an image input from the image compression unit 12 after the trigger signal is generated (several seconds) ˜several tens of seconds) is output to the subsequent frame thinning unit 14.

  The frame decimation unit 14 is controlled by the control unit 30 and executes a frame decimation process of moving images obtained from the ring buffer 13 in response to a command from the control unit 30. Further, the frame decimation unit 14 is configured to output the moving image input from the ring buffer 13 as it is without decimation when no decimation instruction is given from the control unit 30.

  The audio signal acquisition unit 20 includes an audio signal generation unit 21 such as a microphone and a ring buffer 22. The audio signal generation unit 21 obtains audio around the monitoring area in conjunction with moving image shooting in the imaging function unit 10 to generate an audio signal, and sends the audio signal to the ring buffer 22. The ring buffer 22 stores an audio signal for the past several seconds to several tens of seconds when the audio signal is sequentially input from the audio signal generation unit 21.

  The control unit 30 is configured by a microcomputer or the like, and controls the photographing function unit 10 and the audio signal acquisition unit 20 and also controls recording processing of images and audio signals in the storage unit 40.

  Further, the control unit 30 has a function as a remaining capacity detecting unit 31, and detects the remaining storage capacity of the recordable area of the image in the storage unit 40. Then, the control unit 30 determines whether or not the remaining storage capacity of the storage unit 40 is less than a predetermined value. When the remaining storage capacity is less than the predetermined value, the control unit 30 causes the frame thinning unit 14 to function and 14 sends out a thinning command.

  Therefore, the frame thinning unit 14 stores the moving image input from the ring buffer 13 as it is when the remaining storage capacity of the storage unit 40 is larger than a predetermined value and sufficient storage capacity is left. To the unit 40. On the other hand, when the remaining storage capacity of the storage unit 40 becomes smaller than a predetermined value, the moving image input from the ring buffer 13 is thinned out and output to the storage unit 40.

  In the present embodiment, for example, two values TH1 and TH2 (TH1> TH2) for managing the remaining recording capacity of the storage unit 40 are set in the control unit 30, and the remaining storage capacity of the storage unit 40 is the first value. When TH1 or less, the frame decimation unit 14 is instructed to perform the first-stage frame decimation, and then the remaining storage capacity of the storage unit 40 further becomes the second value TH2 or less. The frame decimation unit 14 is instructed to perform frame decimation in the second stage.

  In the first-stage frame thinning process, for example, one frame image is extracted every 2 seconds from a moving image having 30 frames per second, and still images are output at intervals of 2 seconds. In the second stage frame thinning process, for example, one frame image is extracted every 10 seconds from 30 moving images per second, and a still image having a longer acquisition interval than the first stage. Is output. Therefore, when the above-described command is given from the control unit 30, the frame thinning unit 14 sequentially outputs still images at time intervals according to the content of the command.

  In addition, when a trigger signal is generated in the moving body detection unit 19 of the imaging function unit 10 and the ring buffer 13 starts outputting a moving image, the control unit 30 responds to the ring buffer 22 of the audio signal acquisition unit 20 in response thereto. However, the output command of the audio signal is transmitted. Then, the image output from the photographing function unit 10 and the audio signal output from the audio signal acquisition unit 20 are associated with each other and stored in the storage unit 40. Synchronization between each frame image of the moving image obtained by the imaging function unit 10 and the audio signal acquired by the audio signal acquisition unit 20 is maintained by a clock signal (time signal) given from the control unit 30 to each unit, for example. It will be.

  As described above, the monitoring camera 1 of the present embodiment is configured to record images before and after the occurrence of an abnormality in the storage unit 40 when an abnormality occurs, such as when an intruder is detected in the monitoring area, and When the remaining storage capacity of the storage unit 40 becomes smaller than a predetermined value, the moving image recording is switched to the still image recording.

  Next, a specific operation in the monitoring camera 1 configured as described above will be described. 2 to 5 are diagrams illustrating a recording concept of an image recorded in the storage unit 40 when an abnormality is detected in the monitoring camera 1. Each figure illustrates a case where an image having a certain recording time TR is recorded in the storage unit 40 when an abnormality is detected.

  First, FIG. 2 shows a recording form in the case where the remaining storage capacity of the storage unit 40 is sufficient while a moving image is recorded in the storage unit 40. If a moving object is detected by the moving object detection unit 19 at time T0 and a trigger signal is generated, the ring buffer 13 outputs a moving image for the recording time TR to the frame thinning unit 14. The control unit 30 continuously monitors the remaining storage capacity of the storage unit 40, and has the remaining storage capacity of the storage unit 40 become smaller than the first value TH1 and the second value TH2 as the image recording process proceeds? Judging. On the other hand, the frame thinning unit 14 outputs the moving image input from the ring buffer 13 as it is until a thinning command is given from the control unit 30. In the case of FIG. 2, even if moving images are sequentially output from the photographing function unit 10 and recording of moving images to the storage unit 40 proceeds, the remaining storage capacity of the storage unit 40 is sufficient, so the recording time A moving image corresponding to TR is recorded in the storage unit 40. The moving image is recorded in the storage unit 40 with an audio signal corresponding to the recording time TR.

  Next, FIG. 3 shows a recording form when the remaining storage capacity of the storage unit 40 becomes smaller than the first value TH1 during recording of a moving image. As in the case of FIG. 2, if a moving object is detected by the moving object detection unit 19 and a trigger signal is generated at time T0, the ring buffer 13 outputs a moving image for the recording time TR to the frame thinning unit 14. The control unit 30 continuously monitors the remaining storage capacity of the storage unit 40, and as the image recording process proceeds, the remaining storage capacity of the storage unit 40 becomes smaller than the first value TH1 at time T1. Suppose that it is detected. Then, the control unit 30 sends a first-stage decimation command to the frame decimation unit 14 at time T1, and the frame decimation unit 14 responds to the command to pass through the moving image as it is from the first process. Switch to eye frame decimation. As a result, as shown in FIG. 3, in the storage unit 40, a moving image is recorded as an image from time T0 to T1 out of images for the recording time TR, and is acquired at intervals of 2 seconds as an image after time T1. The recorded still image is recorded.

  In the case of FIG. 3, the storage unit 40 records audio signals corresponding to the respective frames with respect to the moving images from time T0 to T1, and each of the still images after time T1. On the other hand, audio signals for a predetermined time are recorded in association with each other. At this time, if the acquisition time of the audio signal associated with the still image matches the acquisition interval of the still image, the audio signal can be recorded in a continuous state. For example, if an audio signal for 2 seconds is associated with a still image, a recorded image after time T1 becomes a still image acquired at intervals of 2 seconds, but the audio signal can be recorded continuously. .

  Next, FIG. 4 shows a case where a trigger signal is generated when the remaining storage capacity of the storage unit 40 is smaller than the first value TH1, and then the remaining storage capacity of the storage unit 40 further increases to the second value TH2. It shows a recording form when the number is less than the above. As in the case of FIG. 2 and FIG. 3, when a moving object is detected by the moving object detection unit 19 and a trigger signal is generated at time T 0, the ring buffer 13 sends a moving image for the recording time TR to the frame thinning unit 14. Output. At this time, since the control unit 30 has already detected that the remaining storage capacity of the storage unit 40 is smaller than the first value TH1, the control unit 30 sends a first-stage thinning command to the frame thinning unit 14. Therefore, the frame decimation unit 14 performs the first-stage frame decimation process immediately after the time T0 when the trigger signal is issued, and outputs a still image at intervals of 2 seconds. Therefore, still images are sequentially recorded in the storage unit 40 in response to the trigger signal.

  Then, the control unit 30 continuously monitors the remaining storage capacity of the storage unit 40, and the remaining storage capacity of the storage unit 40 becomes smaller than the second value TH2 at time T2 as the image recording process proceeds. Is detected. Then, the control unit 30 sends a second stage decimation command to the frame decimation unit 14 at time T2, and the frame decimation unit 14 responds to the command from the first stage frame decimation process to the second stage. Switch to eye frame decimation.

  As a result, as shown in FIG. 4, among the images for the recording time TR, a still image at intervals of 2 seconds is recorded in the storage unit 40 as an image from time T0 to T2, and 10 images as the image after time T2 are recorded. Still images acquired at intervals of seconds are recorded.

  In the case of FIG. 4, audio signals for a predetermined time are recorded in the storage unit 40 in association with each still image. As described above, if the acquisition time of the audio signal associated with the still image is matched with the acquisition interval of the still image, the audio signal can be recorded in a continuous state.

  Next, FIG. 5 shows a recording form in which the remaining storage capacity of the storage unit 40 becomes smaller than the first value TH1 and then becomes smaller than the second value TH2 during moving image recording. It is shown. As in the case of FIGS. 2 to 4, assuming that a moving object is detected by the moving object detection unit 19 and a trigger signal is generated at time T 0, the ring buffer 13 sends a moving image for the recording time TR to the frame thinning unit 14. Output. The control unit 30 continuously monitors the remaining storage capacity of the storage unit 40, and as the image recording process proceeds, the remaining storage capacity of the storage unit 40 becomes less than the first value TH1 at time T3. Suppose that it is detected. Then, the control unit 30 sends a first-stage decimation command to the frame decimation unit 14 at time T1, and the frame decimation unit 14 responds to the command to pass through the moving image as it is from the first process. Switch to eye frame decimation. After that, if the control unit 30 detects that the remaining storage capacity of the storage unit 40 is less than the second value TH2 at time T4, the control unit 30 performs the second operation at time T4 with respect to the frame thinning unit 14. Sends a thinning command at the stage. In response to the command, the frame thinning unit 14 switches from the first stage frame thinning process to the second stage frame thinning process. As a result, as shown in FIG. 5, in the storage unit 40, a moving image is recorded as an image from time T0 to T3 among images for the recording time TR, and an image from time T3 to T4 is recorded at intervals of 2 seconds. The still image acquired in is recorded. Further, still images acquired at 10-second intervals are recorded as images after time T4.

  In the case of FIG. 5, in the storage unit 40, audio signals corresponding to each frame are recorded in association with moving images from time T0 to T3, and still images after time T3 are recorded. On the other hand, audio signals for a predetermined time are recorded in association with each other. If the acquisition time of the audio signal associated with the still image is matched with the acquisition interval of the still image, the audio signal can be recorded in a continuous state.

  Note that the file format in the case where a moving image is recorded in the storage unit 40 is a file format corresponding to a moving image format such as MPEG or motion JPEG. For example, when an audio signal is associated with a moving image, the moving image The audio file is included in the data file. The file format when a still image is recorded in the storage unit 40 is a file format corresponding to a still image format such as JPEG.

  As described above, in the monitoring camera 1 of the present embodiment, moving image shooting at a predetermined frame rate is performed in the shooting function unit 10, and images acquired before and after the trigger signal are recorded in response to the trigger signal. In this case, when it is detected that the remaining storage capacity of the storage unit 40 has become a predetermined value or less, the moving image recording is switched to the still image recording, and the still image is stored in the storage unit 40. Therefore, when the remaining storage capacity of the storage unit 40 becomes small, an image to be recorded can be recorded as a still image in response to the trigger signal, and the storage capacity of the storage unit 40 can be prevented from being filled early. . Therefore, even when trigger signals are frequently issued, more images corresponding to the respective trigger signals can be recorded. In other words, the possibility that an image in response to the trigger signal is not recorded in the storage unit 40 can be reduced.

  In addition, the control unit 30 detects the remaining storage capacity of the storage unit 40 step by step and changes the still image acquisition interval according to each step, thereby recording and saving an image in response to the trigger signal. Recording processing corresponding to the remaining storage capacity of the storage unit 40 is realized. Specifically, when it is detected that the remaining storage capacity of the storage unit 40 is equal to or less than the first value TH1, each frame image obtained by reducing the frame rate of the moving image is set as a still image. When it is detected that the remaining storage capacity of the storage unit 40 is equal to or smaller than the second value TH2 smaller than the first value TH1, the frame rate is further reduced. Individual frame images are stored in the storage unit 40 as still images. By such processing, the still image acquisition interval becomes longer as the remaining storage capacity decreases, and the remaining storage capacity of the storage unit 40 can be used effectively.

  Further, the control unit 30 stores the audio signal acquired in synchronization with the image together with the image in the storage unit 40 in association with each other. In particular, when a still image is stored in the storage unit 40, a sound signal for a predetermined time acquired at the time of shooting the still image is stored in the storage unit 40 together with the still image. In general, only the instantaneous state of the monitoring area can be confirmed with only a still image, but there is an advantage that the state of the monitoring area can be confirmed for a predetermined time by voice by associating a still image with an audio signal for a predetermined time.

  Next, FIG. 6 is a diagram showing a monitoring camera 1a having a configuration different from that in FIG. The monitoring camera 1a in FIG. 6 is different from the monitoring camera 1 in FIG. 1 in that a detection sensor 100 for detecting an intruder or the like in the monitoring area is provided separately from the monitoring camera.

  The detection sensor 100 includes a door sensor, a mat sensor, an infrared sensor, and the like. When an intruder is detected, a trigger signal is generated and sent to the ring buffer 13 of the monitoring camera 1a.

  Then, the monitoring camera 1a starts an image recording process in response to a trigger signal input from the detection sensor 100. Then, the content of the recording process is switched from moving image recording to still image recording in accordance with the remaining storage capacity of the storage unit 40.

  Even with such a configuration, it is possible to achieve the same operational effects as described above. The detection sensor 100 may be provided as an internal function of the monitoring camera 1a.

  Next, FIG. 7 is also a diagram showing a monitoring camera 1b having a configuration different from that in FIG. The monitoring camera 1b in FIG. 7 differs from the monitoring camera 1 in FIG. 1 in that a voice detection unit 200 for detecting an intruder or the like in the monitoring area is provided separately from the monitoring camera.

  The sound detection unit 200 includes a microphone 210, a sound pressure determination unit 220, and a trigger signal generation unit 230. The sound detected by the microphone 210 is converted into an electric signal, and the sound pressure determination unit 220 has a predetermined sound pressure level. Determine whether it is higher than the level. When it is determined that the sound pressure level of the input sound is higher than the predetermined level, the sound pressure determination unit 220 transmits the fact to the trigger signal generation unit 230, and the trigger signal generation unit 230 transmits the ring of the monitoring camera 1b. A trigger signal to be supplied to the buffer 13 is generated.

  Then, the monitoring camera 1b starts image recording processing in response to the trigger signal input from the sound detection unit 200. Then, the content of the recording process is switched from moving image recording to still image recording in accordance with the remaining storage capacity of the storage unit 40.

  Even with such a configuration, it is possible to achieve the same operational effects as described above. The voice detection unit 200 may be provided as an internal function of the monitoring camera 1b.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the contents described above.

  For example, in the above-described embodiment, the monitoring cameras 1, 1a, and 1b are described as an example. However, the above-described technique can be applied even to cameras other than the monitoring camera. That is, if the camera is capable of shooting a moving image and records and saves a moving image obtained by the shooting operation in a storage unit having a certain storage capacity, the technical contents of the present embodiment are applied. The effects described above can be obtained.

  In the above-described embodiment, the case where the audio signal acquisition unit 20 acquires the audio signal synchronized with the photographing operation is illustrated, but the audio signal acquisition is particularly performed for the case where the audio does not need to be recorded and stored. There is no need to provide the portion 20.

  Further, in the above-described embodiment, the case where the images before and after the generation of the trigger signal are recorded in the storage unit 40 when the trigger signal is generated is illustrated, but only the image after the generation of the trigger signal is recorded. If there is, it is not necessary to provide the ring buffer 13 in particular. In this case, when an abnormality is detected by the detection sensor 100 as shown in FIG. 6, the shooting function unit 10 does not always need to perform moving image shooting, and the shooting operation is started after a trigger signal is generated. It doesn't matter.

  In the above-described embodiment, the control unit 30 controls the frame thinning unit 14 to switch the recording process from moving image recording to still image recording. However, the present invention is not limited to this. For example, the image output from the shooting function unit 10 may be switched from a moving image to a still image by switching the shooting operation of the imaging unit 11 from the moving image shooting mode to the still image shooting mode.

It is a figure which shows the structure of a surveillance camera. It is a figure which shows an example of the image recording concept when abnormality is detected in the surveillance camera. It is a figure which shows an example of the image recording concept when abnormality is detected in the surveillance camera. It is a figure which shows an example of the image recording concept when abnormality is detected in the surveillance camera. It is a figure which shows an example of the image recording concept when abnormality is detected in the surveillance camera. It is a figure which shows the surveillance camera of a structure different from FIG. It is a figure which shows the surveillance camera of a structure different from FIG.1 and FIG.6.

Explanation of symbols

1, 1a, 1b Surveillance camera 10 Imaging function unit 11 Imaging unit (imaging means)
DESCRIPTION OF SYMBOLS 12 Image compression part 13,22 Ring buffer 14 Frame thinning part 20 Audio | voice signal acquisition part 21 Audio | voice signal production | generation part (audio | voice signal production | generation means)
30 Control unit (control means)
31 Remaining capacity detection unit (detection means)
40 storage unit (storage means)

Claims (3)

An imaging means capable of capturing an image and outputting image data;
Storage means for storing image data obtained by the imaging means;
Detecting means for detecting the remaining storage capacity of the storage means;
When moving image shooting at a predetermined frame rate is being performed by the imaging unit, a still image is stored when the detection unit detects that the remaining storage capacity of the storage unit is less than or equal to a predetermined value. Control means stored in the means;
With a camera. The camera of claim 1,
The control unit detects that the remaining storage capacity of the storage unit is equal to or less than a first value when the detection unit performs moving image shooting at a predetermined frame rate. In addition, when it is detected that the frame rate of the moving image is reduced and stored in the storage unit, and the remaining storage capacity of the storage unit is less than or equal to the second value smaller than the first value. A camera characterized in that a still image is stored in the storage means. The camera according to claim 1 or 2,
In conjunction with the shooting operation by the imaging means, further comprising a sound signal generating means for acquiring sound and generating a sound signal,
The control means, when storing a still image in the storage means, causes the storage means to store an audio signal acquired at the time of shooting the still image together with the still image.

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