JP4179960B2 - Video camera equipment - Google Patents

Description

  The present invention relates to a video camera apparatus capable of both moving image shooting and still image shooting.

  Conventionally, for example, JP-A-5-83625 (video camera capable of recording moving images and still images) is known as a device capable of recording moving images and still images.

  Furthermore, there is JP-A-5-64133 (recording or reproducing apparatus) as a resolution improved from this. In this method, a still image is recorded in a plurality of frames (tracks).

  By the way, there is a case where it is desired to simultaneously record a desired scene as a clear still image during moving image shooting, or to check and record a still image before and after the desired scene. The video camera was not satisfactory.

  In the case of taking a still image, the conventional image pickup device takes a still image by operating a shutter. However, there is a time lag in storing charges in each element after opening the shutter. When the image change suddenly changes, there is a problem that the image flows and becomes blurred.

  It is an object of the present invention to provide a video camera apparatus that satisfies the above-mentioned demands and eliminates the above problems.

The video camera apparatus of the present invention comprises means described in the following 1) and 2) in order to solve the above problems.

1) Imaging light that has entered from the same optical system is converted into an electrical signal by a photoelectric conversion means, and the converted signal is subjected to a predetermined electrical process to obtain a first recording medium for moving images and a first recording medium for still images. A dual-purpose video camera device for recording image data on two recording media,
Display means for reproducing and displaying the image data;
First storage means for storing the image data for several frames for each frame;
A second storage means for storing the image data for a still image;
In the moving image capturing mode for capturing the moving image, the still image data stored in the second storage unit in response to a predetermined shutter timing signal by the operation unit is stored in the first recording medium. stationary while allowing recording the I Do different from the recording timing to the second recording medium as a still image for each said frame, the image data stored in said first storage means to the second recording medium A video camera device characterized by being recorded as a picture.
2) The imaging light coming from the optical system is converted into an electrical signal by the photoelectric conversion means, and the converted signal is subjected to predetermined electrical processing, so that the first recording medium for moving images and the second recording image for still images A dual-purpose video camera device that records image data on a recording medium,
Display means for reproducing and displaying the image data;
First storage means for storing the image data for several frames for each frame;
A second storage means for storing the image data for a still image;
In the moving image capturing mode for capturing the moving image, the still image data stored in the second storage unit in response to a predetermined shutter timing signal by the operation unit is stored in the first recording medium. Unlike the recording timing for each frame, the image can be recorded as a still image on the second recording medium, and the image data stored in the first storage means can be recorded as a still image on the second recording medium. A video camera device characterized by recording.

  According to the apparatus of the present invention, a moving image and a high-quality still image can be recorded at the same time, and when recording a still image while recording a moving image, the movement of the subject in real time or confirmation on the display can be performed. The desired scene can be selected even if there is a deviation between the movement of the subject and the image of the subject actually recorded on the recording medium. Further, the still image can be stored in another medium, and the accessibility of the still image is improved.

  In addition, a moving image and a high-quality still image can be recorded simultaneously, and a clear image without blurring can be obtained even when a high-speed subject is recorded as a still image.

  Furthermore, there are effects such as recording of moving images and still images at different timings.

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

  FIG. 1 is a schematic block diagram of a video camera apparatus according to one embodiment.

  First, a block system related to moving image recording will be described.

  An optical system 21 composed of a plurality of lenses is configured to be detachable from a mount unit (not shown) so that it can be replaced with another optical system in accordance with the imaging accuracy of the subject. Imaging light coming from here is supplied to a solid-state imaging device (CCD) 23 through a diaphragm 22. The diaphragm 22 is controlled by a diaphragm control unit 37. The diaphragm control unit 37 is controlled based on an automatic exposure (AE) circuit 27 that determines exposure based on a video signal obtained from a signal processing unit 26 described later. It has come to be.

  In the shutter mode described later, a control signal is supplied to the aperture controller 37 from the system controller 41 that has obtained the mode information.

  Next, the solid-state imaging device (CCD) 23 is driven by the CCD driving unit 8 so that the accumulated charges are transferred at a predetermined speed. This transfer speed is controlled by the system controller 41, and the signal transferred therefrom is taken out as an image signal, amplified by the amplifier 24, and then converted into a digital signal by the A / D converter 25.

  The A / D converter 25 is supplied with a clock from the clock generation unit 10 under the control of the system controller 41, thereby being converted into a digital signal at a predetermined speed, and the image thereof. Data is read out. The period of this clock is different between the normal mode (normal moving image capturing mode) and the shutter mode described later.

  For example, a frame memory 9 capable of storing two frames is connected to one output side. The frame memory 9 is not used in the normal mode, and is read out at high speed in the shutter mode. The data is once taken in here.

  The signal processing unit 26 receives an image signal directly from the A / D converter 25 in the normal mode, and temporarily stores the image data stored in the frame memory 9 in the shutter mode. Is read at a normal speed, and when the incoming signal is an R, G, B signal, it is converted into a luminance signal, or known signal processing such as a color difference signal is applied. Stored at a predetermined address. The signal processing unit 26 reads the stored image data again, performs known signal processing such as white balance adjustment, and stores the data in the buffer memory 30 again.

  From one output of the signal processing unit 26, an image signal is supplied to an auto-focus (AF) circuit 28, where a high-frequency signal component is extracted and passed through the lens control unit 29 to the optical system 21. The focus control can be performed. A video signal for monitoring is supplied to the switch SW1 from the other output, and a video signal is also supplied to the recording processing circuit 35.

  Further, the buffer memory 30 sequentially stores, for example, data for 5 frames of incoming image data. When image data of 5 frames or more arrives, the data is sequentially rewritten to new data. For example, when the still image trigger SW2 is operated, a clock is generated from the synchronization generating circuit 31, and at that timing The incoming image data is held.

  Further, when the timing change SW 7 constituted by an up / down switch is operated, a clock is generated from the synchronization signal generating circuit 31 in response to this operation, and the image data of 5 frames in the buffer memory 30 is stored. Both are read regardless of the order of arrival. The read image data is supplied to an encoder 101 of a still image circuit system, which will be described later, and also supplied to the switching SW1 side.

  Next, the recording processing circuit 35 is a circuit that converts the received image data into an analog signal or performs known signal processing such as emphasis processing to process a normal video signal. On the other hand, an audio signal enters the recording processing circuit 35 through the MAC 3, the amplifier 32, the A / D conversion circuit 33, and the signal processing unit 34 in order. Or the separated signal is supplied to the recording / reproducing apparatus 36 and the output terminal 107 in the next stage.

  The recording / reproducing device 36 is, for example, a device having a known configuration that is equipped with a rotating drum and is capable of recording by mounting a tape cassette. Here, the reproduced signal is subjected to a known process such as de-emphasis in the reproduction processing circuit 100 and is supplied to the switch SW2. This switching SW2 is switched by the system controller 41 as necessary.

  The above is the schematic configuration of the block system related to moving image recording.

  Next, a block system related to still image recording will be described.

  This block system is mainly composed of an output system from the buffer memory 30, and an output from the buffer memory 30 is connected to an encoder 101. The encoder 101 is, for example, an international standard system. This is a circuit for compressing still image data according to JPEG (Joint Photographic Coding Experts Group).

  This output is connected to a recording / reproducing device 102. This device 102 is constituted by a known, preferably 2.5 inch disk device capable of recording by mounting a floppy disk, for example. A high-quality still image is recorded in a predetermined track area of the disc.

  The decoder 103 performs a restoration process such as a known decoding process on the signal reproduced from the recording / reproducing apparatus 102, and supplies the restored data to the buffer memory 104. The output is connected to the switch SW1. The switch SW1 is switched by the system controller 41 in the same manner as the switch SW2. Further, one of the outputs from the buffer memory 104 may be connected to a modem or the like.

  The above is a schematic block diagram of the still image recording system.

  Next, the embodiment of the present invention will be further described in detail by the explanation of the operation by such a configuration. First, a case where a desired still image is recorded on a disc while capturing a moving image will be described. In this case, first, the moving picture trigger SW6 is operated. As a result, a control signal is supplied from the system controller 41 to the recording / reproducing apparatus 3, and for example, the recording / reproducing apparatus 36 is in an operating state, that is, from the tape cassette that is mounted to the peripheral surface of the rotating drum. It is pulled out to a known recording mode. Similarly, the recording / reproducing apparatus 102 is also in a standby state.

  On the other hand, the CCD drive unit 8 and the clock unit 10 are supplied with control signals for achieving a normal transfer rate and a read rate.

  As a result, the imaging light that has entered through the optical system 21 is photoelectrically converted by the solid-state imaging device 23, extracted as an electrical signal at a normal transfer rate, amplified by the amplifier 24, and then supplied to the A / D converter 25. Here, the signal is converted into a digital signal by a normal speed clock.

  In the case of this normal speed, the frame memory 9 is not used and is supplied to the signal processing unit 26 as it is, and the processing described above is performed. At this time, the switching SW1 is switched to the terminal b side by the system controller 41, and this output signal is supplied to the display 105 to monitor the imaging state.

  Further, image data is supplied to the buffer memory 30 from the other output of the signal processing unit 26. Here, the image data that has been signal processed by passing through the signal processing unit 26 is sequentially stored. Is done. On the other hand, the image data is also supplied to the recording circuit 35, where the above-mentioned signal processing is performed, and the magnetic tape in the recording / reproducing apparatus 36 together with the audio signal coming from the MIC3. Are recorded as moving images.

  The output of the signal processing unit 26 is connected to an output terminal 107 so that it can be connected to another display, a dubbing device, or the like.

  In the playback mode, when a mode switch (not shown) is operated, the terminal of the switch SW1 is switched to the a side, and the terminal of the switch SW2 is switched to the a side. The signal can be viewed on the display unit 105.

  By the way, when a desired scene is confirmed on the display unit 105 and the still image trigger SW2 is operated at the time of moving image shooting described above, operation information is supplied to the synchronization signal generation circuit 31, and the synchronization signal is generated at this timing. Generated. As a result, a total of five specific image data and previous and subsequent image data of the incoming image data are held in the buffer memory 30. At the same time, the system controller 41 switches the switching SW1 to the terminal a side and the switching SW2 to the terminal b side.

  In this state, the held specific still image is displayed on the display unit 105.

  After that, when the timing change SW 7 is operated, the previous and next image data are read regardless of the time series according to the operation direction, that is, the up / down direction, and the image is confirmed on the display unit 105. However, select any or all of them. As a result, these images are supplied to the encoder 101, and the selected images are supplied to the encoder 101 as a trigger by simultaneously pressing the up / down operation switches of the timing change SW 7 and are attached to the recording / reproducing apparatus 102. It is recorded on the disc as a high-quality still image.

  When playing back this image, when a mode switch (not shown) is operated, the switch SW1 is switched to the terminal c side, the restoration process is performed by the decoder 103, and the still image temporarily stored in the buffer memory 104 is stored. This can be confirmed on the display unit 105.

  Therefore, in such a case, even when a desired scene comes in while shooting a moving image, the scene can be recorded as a high-quality still image simultaneously with the moving image recording.

  In particular, the timing change SW 7 makes it possible to determine the image before and after a predetermined frame, and the actual movement of the subject and the movement of the subject confirmed on the display unit 105 are actually recorded on the recording medium. Even if the subject image is misaligned, such a function allows a desired scene to be selected from a plurality of frames of image data, thus eliminating such a problem. In the conventional apparatus, a slight delay occurs in each circuit unit, and a slight deviation occurs between the still image at the time of shutter and the recorded still image. However, in the case of this apparatus, such a problem does not occur. .

  Next, the shutter mode will be described. This shutter mode is an effective mode in which a subject is in a high-speed movement state or a subject that may move from a stationary state to a high-speed movement state during moving image shooting.

  For example, when the still image trigger SW1 is operated during moving image shooting, a control signal for opening the aperture 22 is supplied from the system controller 41 to the aperture controller 37 through the AE circuit 27 at the timing.

  At the same time, a drive signal for high-speed transfer is supplied to the CCD drive unit 8, the charge accumulated up to this point is canceled in the solid-state imaging device 23, and an image at that timing is accumulated. Then, a charge image is transferred from each charge element of the solid-state image sensor 23 within a short time and supplied to the A / D converter 25 through the amplifier 24 at the next stage.

  The A / D converter 25 is supplied with a clock synchronized with the CCD drive unit 8 from the clock generation unit 10 and is converted into a digital signal at a high speed based on this clock. Stored. At the same time, the image data already recorded is read out at a normal speed by the signal processing unit 26 and subjected to the same signal processing as described above, and the buffer memory 30 and the recording processing circuit as described above. And 35 respectively. Then, the still image that has been subjected to the predetermined processing by the recording processing circuit 35 is continuously recorded on the moving image that has already been recorded by the recording / reproducing apparatus 36.

  On the other hand, as the still image data stored in the buffer memory 30, a high-quality still image is recorded through the encoder 101. Further, when the timing change SW 7 is operated, the switch leading to the display unit 105 is switched, and a desired still image is selected and a high-quality still image is recorded in the same manner as described above.

  Therefore, according to the mode of this embodiment, the electric charge accumulated in the solid-state imaging device 23 is immediately canceled when the shutter mode is set, and an image is accumulated from this point, and the digital image is obtained at a speed corresponding to this. Therefore, there is no case where a subject image moving at high speed flows and a corner image is not missed.

  Further, another embodiment of the above shutter mode will be described. In this embodiment, the CCD drive unit 8 and the clock unit 10 are always operated at high speed, and are processed by the signal processing unit 26 and the buffer memory 30. Since the CCD drive unit 8 and the clock unit 10 are not operating at all times, the CCD drive unit 8 and the clock unit 10 have a pause. In this shutter mode, data is written in the frame memory 9 in the time zone immediately close to the timing of the shutter (still image trigger SW1), and transferred to the buffer memory 30 via the signal processing unit 26. Therefore, the still image data from the frame memory 9 is added to the moving image and subjected to signal processing. For this reason, a still image is recorded without affecting the moving image at all.

  Further, four moving images are held before and after the shut timing. Similarly, these can be recorded while being read and confirmed by the timing change SW 7. In this case, four pieces of image data from the moving image are less blurred.

  In this way, a moving image may be recorded as a continuous image in a strobe manner. In this case, in the recording mode to the first recording medium (tape), the stored image data is recorded on the second recording medium (disk) different from the recording timing to the first recording medium. Can be.

1 is a schematic block diagram of a video camera apparatus according to an embodiment of the present invention.

Explanation of symbols

1, 2 Still image trigger SW
6 Movie trigger SW
7 Timing change SW
DESCRIPTION OF SYMBOLS 8 CCD drive part 9 Frame memory 10 Clock generation part 21 Optical system 22 Aperture 23 Solid-state image sensor 30 Buffer memory 31 Synchronization generation circuit 35 Recording processing circuit 36,102 Recording / reproducing apparatus 37 Aperture control part 35 Recording processing circuit 36,102 Recording / Reproducing Device 37 Aperture Control Unit 100 Reproduction Processing Circuit 101 Encoder 103 Decoder

Claims (2)

The imaging light coming from the same optical system is converted into an electrical signal by the photoelectric conversion means, and the converted signal is subjected to predetermined electrical processing, so that the first recording medium for moving images and the second recording image for still images are used. A dual-purpose video camera device that records image data on a recording medium,
Display means for reproducing and displaying the image data;
First storage means for storing the image data for several frames for each frame;
A second storage means for storing the image data for a still image;
In the moving image capturing mode for capturing the moving image, the still image data stored in the second storage unit in response to a predetermined shutter timing signal by the operation unit is stored in the first recording medium. stationary while allowing recording the I Do different from the recording timing to the second recording medium as a still image for each said frame, the image data stored in said first storage means to the second recording medium A video camera device characterized by being recorded as a picture. The imaging light that has entered from the optical system is converted into an electrical signal by photoelectric conversion means, and the converted signal is subjected to predetermined electrical processing, whereby a first recording medium for moving images and a second recording medium for still images And a dual-purpose video camera device for recording as image data,
Display means for reproducing and displaying the image data;
First storage means for storing the image data for several frames for each frame;
A second storage means for storing the image data for a still image;
In the moving image capturing mode for capturing the moving image, the still image data stored in the second storage unit in response to a predetermined shutter timing signal by the operation unit is stored in the first recording medium. stationary while allowing recording the I Do different from the recording timing to the second recording medium as a still image for each said frame, the image data stored in said first storage means to the second recording medium A video camera device characterized by being recorded as a picture.

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