JP2008113270A - Video reorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily erase only a video part in video and sound recorded without intention. <P>SOLUTION: A video characteristic detection circuit 28 of an abnormality photographing detection circuit 26 analyzes video data to detect whether a lens cap is attached. A ground photographing detection circuit 30 detects a ground photographing state. A recording and reproduction control circuit 32 controls a recording and reproduction circuit 14 so as to composite the video and sound and record the video and sound in a storage circuit 12 in a normal photographing state, and separate the video from the sound and record them in the storage circuit 12 in an abnormal photographing state according to detection results of the detection circuits 28 and 30. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a video recording apparatus that records video and audio, and more specifically to a video recording apparatus that can easily delete an unintended recorded video.

  When taking a picture with a video camera on hand, the recording start / stop operation may fail, and the shooting may continue even though it was intended to stop. If you carry it around in that state, the ground will be recorded. In addition, recording may be started with the lens cap kept on.

Japanese Patent Application Laid-Open No. 2004-228561 describes a technique in which such a situation is detected by a ground shooting detection circuit to display a warning, and automatically pauses when the photographer does not perform a button operation. .
JP-A-8-275033

  However, an unintentionally photographed part is usually not necessary, and it squeezes the free space on the recording medium.

  On the other hand, even during unintended recording, valuable information or interesting conversations may be recorded for the voice.

  In view of the above problems, an object of the present invention is to provide a video recording apparatus that can easily delete only a video portion of unintentionally recorded video and audio.

  In order to achieve the above object, a video recording apparatus according to the present invention records imaging means, audio input means, video information input by the imaging means, and audio information input by the audio input means. The recording means for recording on the medium, the photographing abnormality detecting means for detecting an abnormal photographing situation, and the recording method of the video information and the sound information of the recording means are changed according to the detection result of the photographing abnormality detecting means. And a recording control means.

  According to the present invention, when an abnormal shooting situation occurs, the video and audio are recorded separately during the abnormal shooting period, so that only the video can be easily erased after shooting.

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

  FIG. 1 is a schematic block diagram of an image pickup apparatus 10 that is an embodiment of the present invention. In FIG. 1, the imaging apparatus 10 includes a storage circuit 12, a recording / reproducing circuit 14, an operation unit 16, a microphone circuit 18, a camera circuit 20, a speaker circuit 22, a liquid crystal display circuit 24, an abnormal photographing detection circuit 26, and a recording / reproducing control circuit 32. Have The abnormal shooting detection circuit 26 includes a video feature detection circuit 28 and a ground shooting detection circuit 30.

  The storage circuit 12 stores stream data including video data and audio data. The recording / reproducing circuit 14 has a function of generating stream data from video data and audio data and writing it to the storage circuit 12, and a function of reading stream data from the storage circuit 12 and restoring it to video data and audio data.

  The operation unit 16 includes buttons such as start / stop, standby, playback, stop, left and right. The microphone circuit 18 has a function of generating audio data from the sound to be recorded. The camera circuit 20 has a function of generating video data from video to be recorded. The speaker circuit 22 reproduces sound from the audio data.

  The liquid crystal display circuit 24 displays an image from the image data. The abnormal photographing detection circuit 26 has a function of detecting abnormal photographing. In particular, the video feature detection circuit 28 has a function of analyzing video data and detecting whether a lens cap (not shown) is attached. The ground shooting detection circuit 30 has a function of detecting the ground shooting state. The recording / reproducing control circuit 32 has a function of controlling the recording / reproducing circuit 14 in accordance with the code from the operation unit 16 and the state of the recording / reproducing circuit 14.

  Next, each operation mode of the imaging device 10 will be described. FIG. 2 is a state transition diagram of the recording / reproducing control circuit 32. However, S1 represents a stop mode, S2 represents a standby mode, S3 represents a recording mode, S4 represents a special recording mode, and S5 represents a reproduction mode. In the initial state, the stop mode S1 is set.

  In the stop mode S <b> 1, the recording / reproducing circuit 14 outputs video data of a list display of the contents of the storage circuit 12 to the liquid crystal display circuit 24.

  In the standby mode S <b> 2, the recording / reproducing circuit 14 outputs the video data input from the camera circuit 20 to the liquid crystal display circuit 24.

  In the recording mode S 3, the recording / reproducing circuit 14 generates stream data from the video data input from the camera circuit 20 and the audio data input from the microphone circuit 18 and writes the stream data in the storage circuit 12. In parallel with this, the recording / reproducing circuit 14 outputs the video data input from the camera circuit 20 to the liquid crystal display circuit 24.

  In the special recording mode S4, the recording / reproducing circuit 14 generates stream data of a format different from that in the recording mode S3 from the video data input from the camera circuit 20 and the audio data input from the microphone circuit 18, and stores it in the storage circuit 12. Write. In parallel with this, the recording / reproducing circuit 14 outputs the video data input from the camera circuit 20 to the liquid crystal display circuit 24.

  In the reproduction mode S5, the recording / reproducing circuit 14 reads out the stream data corresponding to the content selected by the left button and the right button from the storage circuit 12, restores the video data and the audio data, and sends the video data to the liquid crystal display circuit 24. Also, the audio data is output to the speaker circuit 22.

  The imaging device 10 transitions between the above operation modes S1 to S5 as follows. When the standby button is pressed in the stop mode S1, a transition is made to the standby mode S2. In the stop mode S1, when the cursor is moved by operating the left button and the right button to select the contents of the storage circuit 12, and the playback button is pressed, the mode changes to the playback mode S5.

  When the start / stop button is pressed in the standby mode S2, a transition is made to the recording mode S2. When the stop button is pressed in the standby mode S2, a transition is made to the stop mode S1.

  When the start / stop button is pressed in the recording mode S3, a transition is made to the standby mode S2. When an abnormal state is detected by the abnormal photographing detection circuit 26 in the recording mode S3, the state transits to the special recording mode S4.

  When a normal state is detected by the abnormal photographing detection circuit 26 in the special recording mode S4, the state transits to the recording mode S3. When the start / stop button is pressed in the special recording mode S4, a transition is made to the standby mode S2.

  When the stop button is pressed in the reproduction mode S5, the mode changes to the stop mode S1. When the video deletion button is operated in the reproduction mode S5, the specially recorded portion of the video is deleted from the stream data corresponding to the content selected by the left button and the right button.

  A method for creating stream data will be described with reference to FIG. FIG. 3 shows a recording example according to this embodiment. In FIG. 3, stream data 50 indicates stream data including audio data from the microphone circuit 18 and video data from the camera circuit 20.

  Recording starts at the recording start position 52. It is assumed that the ground shooting detection circuit 30 detects ground shooting at the ground shooting start position 54 and no longer detects ground shooting at the ground shooting end position 56. Recording ends at the recording end position 58.

  In this embodiment, a period 60 from the recording start position 52 to the ground shooting start position 54 is a normal recording period recorded in the recording mode S3. A period 62 from the ground shooting start position 54 to the ground shooting end position 56 is a special recording period recorded in the special recording mode S4. A period 64 from the ground shooting end position 56 to the recording end position 58 again becomes a normal recording period for recording in the recording mode S3.

  In the normal recording periods 60 and 64, video / audio information generated from the video data and audio data is additionally recorded in the stream data 50 in units of blocks. In the special recording period 62, video information generated from video data and audio information generated from audio data are additionally recorded in the stream data 50 alternately in units of blocks.

  FIG. 4 shows an example of stream data after the video information in the special recording period is deleted. The stream data 70 is stream data after the video portion of the special recording period 62 is deleted from the stream data 50.

  Thus, in this embodiment, since only the video / audio information aerial video data at the time of shooting is deleted, the storage capacity of the storage circuit 12 can be secured.

  As shown in FIG. 5, a power consumption control circuit 80 that controls the power supply of the camera circuit 20 may be provided in accordance with the detection result of the ground shooting detection circuit 30 of the abnormal shooting detection circuit 26. When the ground shooting detection circuit 30 detects the ground shooting state, the power consumption control circuit 80 controls the camera circuit 20 to stop the shooting function of the camera circuit 20 and reduce the power consumption, and the ground shooting state is not detected. Then, the camera circuit 20 is controlled so that the photographing function of the camera circuit 20 is restored.

  FIG. 6 shows an example of a recording stream in this embodiment. The stream data 80 shows an example of stream data recorded in the storage circuit 12 according to this embodiment.

  Recording is started at the recording start position 82. Assume that the ground shooting detection circuit 30 detects ground shooting at the ground shooting start position 84 and no longer detects ground shooting at the ground shooting end position 86. Recording ends at the recording end position 58.

  A period 90 from the recording start position 82 to the ground shooting start position 84 is a normal recording period recorded in the recording mode S3. A period 92 from the ground shooting start position 84 to the ground shooting end position 86 is a special recording period recorded in the special recording mode S4. In the special recording period 92, the power consumption control circuit 80 stops the photographing function of the camera circuit 20, so that the recording / reproducing circuit 14 does not supply video information to be recorded to the storage circuit 12. A period 94 from the ground shooting end position 86 to the recording end position 88 again becomes a normal recording period in which recording is performed in the recording mode S3.

  In the normal recording periods 60 and 66, video / audio information generated from video data and audio data is additionally recorded in the stream data 50 in units of blocks. In the special recording period 62, since there is no video information generated from the video data, only the audio information generated from the audio data is additionally recorded in the stream data 80.

  In the first embodiment, in the special recording mode, the video information and the audio information are independently recorded in units of blocks so that only the video information can be deleted later. However, the video information and the audio information are recorded as separate stream data. Also good. FIG. 7 shows an example of such recording. 100 is the main stream data that is valid in the entire recording period, and 116 is the sub-stream data recorded in the special recording mode. The substream data 116 includes only video information.

  Recording starts at the recording start position 102. Assume that the ground shooting detection circuit 30 detects ground shooting at the ground shooting start position 104 and no longer detects ground shooting at the ground shooting end position 106. Recording ends at the recording end position 108.

  A period 110 from the recording start position 102 to the ground shooting start position 104 is a normal recording period recorded in the recording mode S3. A period 112 from the ground shooting start position 104 to the ground shooting end position 106 is a special recording period recorded in the special recording mode S4. A period 114 from the ground shooting end position 106 to the recording end position 108 becomes the normal recording period recorded in the recording mode S3 again.

  In the normal recording periods 110 and 114, video / audio information generated from the video data and audio data is additionally recorded in the main stream data 100 in units of blocks. In the special recording period 112, video information generated from video data is recorded as sub-stream data 116 different from the main stream data 100 in units of blocks, and audio information generated from the audio data is stored in units of blocks as main stream data. 100 is additionally recorded.

  In the substream data 116, video / audio information generated from video data and audio data may be recorded.

1 is a block diagram illustrating a schematic configuration of an imaging apparatus according to an embodiment of the present invention. It is a state transition diagram of an operation mode. 6 is a diagram illustrating an example of stream data recorded in Embodiment 1. FIG. It is a figure which shows the stream data after deleting the video information of a special recording period from the stream data shown in FIG. It is a schematic block diagram of the changed part of Example 2. 10 is a diagram illustrating an example of stream data recorded in Embodiment 2. FIG. It is a figure which shows the example of the stream data recorded in Example 3. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image pick-up device 12 Memory | storage circuit 14 Memory | storage reproduction | regeneration circuit 16 Operation unit 18 Microphone circuit 20 Camera circuit 22 Speaker circuit 24 Liquid crystal display circuit 26 Abnormal imaging | photography detection circuit 28 Image | video feature detection circuit 30 Ground shooting detection circuit 32 Recording / reproduction control circuit 150 Power consumption control circuit

Claims (8)

Imaging means (20);
Voice input means (18);
Recording means (14) for recording video information input by the imaging means (18) and audio information input by the audio input means (18) in a recording medium (12);
Photographing abnormality detecting means (26) for detecting an abnormal photographing situation;
Recording control means (32) for changing the recording method of the video information and the audio information of the recording means (14) according to the detection result of the photographing abnormality detection means (26).
A video / audio recording apparatus comprising:   The video / audio recording apparatus according to claim 1, wherein the abnormal shooting situation is ground shooting or lens cap mounting.   The recording control means controls the recording means to record the video / audio information including the video information and the audio information on the recording medium when the detection result of the imaging abnormality detection means is normal, The recording means is controlled to separate the video information and the audio information and record them on the recording medium when the detection result of the imaging abnormality detection means is abnormal. The video recording apparatus described.   4. The video recording / reproducing apparatus according to claim 3, further comprising a deleting unit that deletes the video information recorded on the recording medium.   The recording control means controls the recording means to record the video / audio information including the video information and the audio information on the recording medium when the detection result of the imaging abnormality detection means is normal, 3. The recording means is controlled to record the audio information on the recording medium without recording the video information when the detection result of the photographing abnormality detecting means is abnormal. The video recording apparatus described in 1.   The video recording apparatus according to claim 5, further comprising a power control unit that controls the imaging unit to a power saving state when a detection result of the imaging abnormality detection unit is abnormal.   The recording control means controls the recording means to record the video / audio information including the video information and the audio information on the recording medium when the detection result of the imaging abnormality detection means is normal, When the detection result of the imaging abnormality detection unit is abnormal, the recording unit is controlled so that the audio information and the video information including the video information and the audio information are independently recorded on the recording medium. The video recording apparatus according to claim 1, wherein:   8. The video recording / reproducing apparatus according to claim 7, further comprising a deletion unit that deletes the video / audio information recorded on the recording medium independently of the audio information.

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