JPH1042233A - Video camera device and video reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a miniaturizable and weight-reducable video reproducing device for recording hand shake correction data on a tape along with video data and reproducing images without hand shake based on the correction data. SOLUTION: A correction signal generation part 3 computes a correction amount from the output of a motion detection sensor 2 for detecting the motion of a video camera device main body and obtains a motion correction amount. An image pjckup part 6 converts object image light image-formed on a lens 4 to the video data. To the correction amount and the video data, error correction coding and a synthesizing processing are executed by an error correction coding/synthesizing processing part 6 and they are passed through a recording modulation processing part 7 and an amplifier 8 for recording and recorded on the tape 10 by a recording head 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a video camera device and a video playback device. More specifically, the present invention relates to a camera shake correction function of a video camera.

[0002]

2. Description of the Related Art In recent years, handy-type video camera devices provided with a so-called CCD image sensor have been downsized.
The weight has been reduced, and it has become easier for users to handle.
However, on the other hand, there is a problem that the camera shake is likely to occur at the time of imaging due to the reduction in size and weight of the video camera. If camera shake occurs at the time of imaging, for example, when an image captured by zooming up is reproduced, fine “fluctuation” is generated in the reproduced image, and the reproduced image becomes very difficult to see.

As a method for preventing the "shake" due to the camera shake, there is known a technique of correcting the camera shake using a camera shake correction device attached to a video camera device.

A conventional video camera apparatus having a camera shake correction function has a camera shake detection function and a camera shake correction function. Magazine "Nikkei Electronics" November 2, 1991
As described on page 217 of the 5th issue and on page 205 of the July 6, 1992, the camera shake detection function is realized by a method such as a motion vector detection method or an angular velocity detection method, and the camera shake correction function is realized by a gimbal mechanism. It is known that the method is realized by a method such as a control method, an active prism method, a resampling control method (memory control method), or a CCD driving method.

[0005] Motion vector detection is a method of comparing the current image (current frame) and the immediately preceding image (previous frame) to determine how much the entire image has moved on the screen by digital signal processing. . The angular velocity detection is a method of detecting a change in angular velocity of vibration due to camera shake using an angular velocity sensor such as a gyro.

[0006] The gimbal mechanism control method is a method of correcting by controlling the direction of a lens in accordance with the movement of a camera body. Attach a lens at the opportunity to rotate in two directions, left and right (horizontal) and up and down (vertical), and control using an actuator. In the active prism method, an optical axis is adjusted by changing the shape of a prism using an actuator, and camera shake is corrected. The resampling method (memory control method) stores a digitized image in the frame memory, cuts out a part of the image data stored in the frame memory according to the amount and direction of the detected camera shake, and enlarges the cut out image. (Use data complement between sample points together) Return to original image size. The CCD drive control method is a method of changing a cut-out portion of a captured image by controlling the timing of reading out the charge of each pixel.

[0007]

However, a conventional video camera apparatus having a camera shake correction function must have both a camera shake detection function and a camera shake correction function, and there is a limit to reducing the size and weight. There is.

Also, video data recorded on a tape without performing camera shake correction cannot be corrected when the video data is reproduced.

The present invention has been made in view of such circumstances, and provides a video reproducing apparatus that reproduces an image without "jitter" from data of a camera shake correction recorded on a tape. It is an object of the present invention to provide a video camera device that can be reduced in weight.

[0010]

In order to solve the above-mentioned problems, a video camera device according to the present invention comprises: a shake amount detecting means for detecting a shake amount of an image caused by a shake of a video camera device main body; Image capturing means for capturing a video signal and generating a video signal; signal synthesizing means for synthesizing the amount of image fluctuation output from the shake detecting means and the video signal output from the image capturing means; output from the signal synthesizing means Means for recording a combined signal of the shake amount and the video signal on a recording medium.

Further, the video reproducing apparatus according to the present invention comprises: a recording medium for recording a combined signal which combines a video signal obtained by capturing a subject and a video signal obtained by capturing a subject by shaking an image caused by the video camera apparatus body shaking; Reproducing means for reproducing the synthesized signal; and a shaking amount and a video signal obtained by synthesizing a shaking amount of an image caused by shaking of the video camera apparatus main body reproduced by the reproducing means and a video signal obtained by imaging a subject. And a means for correcting, based on the amount of shaking divided by the signal dividing means, the fluctuation of the image of the video signal divided by the signal dividing means.

In the video camera device according to the present invention, the amount of the shake of the video camera device main body detected by the shake amount detecting means and the video data are simultaneously recorded on the recording medium. Further, in the video reproducing apparatus according to the present invention, the swing of the image is corrected based on the swing amount recorded on the recording medium.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a video camera device according to the present invention. The video camera device 1 includes a motion detection sensor 2 that detects the shaking of the video camera body, a correction signal generation unit 3 that generates correction amount data based on a detection signal of the motion detection sensor 2, and subject image light incident thereon. A lens 4, an imaging unit 5 for converting subject image light formed through the lens 4 into compressed image data,
An error correction coding / synthesis processing unit 6 for synthesizing the correction amount data and the compressed image data supplied from the correction signal generation unit 3 and the imaging unit 5 and performing error correction coding; a recording modulation processing unit 7; A recording amplifier 8 for amplification and a recording head 9 for recording a signal on a tape 10 are provided.

The correction signal generator 3 includes an A / D converter 11 for converting the motion detection signal of the motion detection sensor 2 from analog to digital (A / D), and a digital signal for motion detection supplied from the A / D converter 11. And a signal processing microcomputer 13 for processing the correction amount data supplied from the correction amount calculation unit 12 into pack data of system data.

The image pickup section 5 includes a CCD image pickup element 14 that converts the subject image light formed through the lens 4 into an image pickup signal,
An A / D converter 15 that converts an image signal supplied from the CCD image sensor 14 from analog to digital, and a luminance (Y) signal, a chroma (C) signal, and the like are generated from the digital image signal supplied from the A / D converter 15. A video signal memory 16 for temporarily storing image data generated by the camera signal processing unit 16 for later compression processing, and performing a compression process of the image data based on the image data stored in the video memory. Video compression processing unit 18
And

The subject image light incident through the lens 4 is
An image is formed on the light receiving surface of the CCD imaging device 14. C in this case
The CD imaging device 14 is composed of an optical filter and three CCD imaging devices that respectively receive the respective color lights, but is not limited to this example, and may be composed of one CCD imaging device, for example.

The subject image light formed on the light receiving surface of the CCD image sensor 14 is converted by the CCD image sensor 14 into an image signal which is an electric signal. The image signal is converted into a digital image signal by the A / D converter 15 and supplied to the camera signal processing unit 16.

The camera signal processing section 16 performs processing such as generation of a luminance (Y) signal and a chroma (C) signal from the digital image pickup signal to generate image data. The image data processed by the camera signal processing unit 16 is supplied to a video memory 17.

The video memory 17 temporarily stores image data. The image data temporarily stored in the video memory 17 is subjected to compression processing by the video signal compression processing unit 18,
Compressed image data is generated.

The motion detecting sensor 2 detects the angular velocity by using, for example, a piezoelectric vibrating gyroscope, and detects the vertical and horizontal motions of the video camera body. The motion detection signal detected by the motion detection sensor 2 is converted by the A / D converter 11 into a digital signal for each sampling frequency. The motion detection signal converted into the digital signal is supplied to the correction amount calculation unit 12.

The correction amount calculating section 12 performs a "shake" due to a camera shake in the vertical and horizontal directions based on the motion detection signal.
Is calculated to obtain a motion correction amount. If the motion detection sensor 2 is based on, for example, a piezoelectric vibrating gyro,
The amount of change is calculated by calculating the amount of change from the detected angular velocity. The motion correction amount is supplied to the signal processing microcomputer 13.

The amount of motion correction is determined by the signal processing microcomputer 13.
Is processed as pack data of system data. The pack data used at this time may be newly set, or may be set by the manufacturer in an option pack of the manufacturer. The pack data of the motion correction amount at this time may be recorded anywhere in the option area other than the main pack of the system data section.

FIG. 2 shows an example of a pack for recording system data of a correction amount, using a spare part of a camera pack in a virtual VTR format. The pack header 72h is a spare pack that is not currently defined in the camera pack. The correction amount calculated by the correction amount calculation unit 12 has a smaller number of bits than the value from the actual sensor, and the vertical and horizontal directions are each represented by 8 bits, and are respectively stored in the packs PC1 and PC2 shown in the figure. Can be

The compressed image data output from the video compression processing section 18 in FIG. 1 and the system data output from the signal processing microcomputer 13 are supplied to the error correction encoding / combining processing section 6. The error correction coding / synthesis processing unit 6 rearranges the supplied compressed image data and system data into a pattern to be recorded on a tape serving as a recording medium, performs synthesis processing, adds an error correction code, and outputs video data. Generate

The video data which has been subjected to error correction coding and synthesis processing is modulated by a recording modulation processing section 7 into a video signal recordable on a tape 10, amplified by a recording amplifier 8, and passed through a head 9. It is recorded on the tape 10.

Therefore, the video camera device 1 according to the present invention
Shows the data of the camera shake correction amount together with the image data on the tape 1.
0 can be recorded, and the size of the apparatus main body can be reduced.

FIG. 3 is a block diagram of a video reproducing apparatus according to the present invention. The video reproducing device 20 includes a reproducing amplifier 23 for amplifying a video signal reproduced from the tape 21 by the head 22, a reproducing demodulation processing unit 24 for demodulating the video signal supplied from the reproducing amplifier 23, and a reproducing demodulation processing unit. An error correction encoding / division processing unit 25 for error-correcting and decoding the video data demodulated by 24, and dividing the decoded video data into compressed image data and system data; and an error correction decoding / division processing unit A video signal decompression unit 26 for decompressing the compressed image data divided by 25; a signal processing microcomputer 27 for extracting correction amount data from the pack data of the system data divided by the error correction decoding / division processing unit 25; A video memory 28 for temporarily storing the decompressed image data, and a complement supplied from the signal processing microcomputer 27. A shake correction controller 29 of the camera shake correction of the video data temporarily stored in the video memory 28 based on the amount data, the video memory 28, which is image stabilization by shake correction controller 29
And a digital / analog (D / A) converter 31 for converting the image data interpolated by the filter 30 into an analog video signal.

The video signal reproduced from the tape 21 by the head 22 is amplified by a reproduction amplifier 23,
Demodulation processing is performed by the reproduction / demodulation processing unit 24, and digital video data is output.

The video data demodulated into a digital signal is supplied to an error correction decoding / division processing section 25. The error correction decoding / division processing unit 25 performs error correction processing and decoding processing on the supplied digital video data, and divides the decoded video data into image data and system data. The image data is supplied to a video signal decompression processing unit 26, and the system data is supplied to a signal processing microcomputer 27.

In the video decompression processing section 26, since the image data has been subjected to the compression processing by the video camera device 1, the supplied image data is decompressed by the same algorithm used for the compression processing. . The decompressed image data is supplied to the video memory 28 where temporary data is stored.

The signal processing microcomputer 27 extracts vertical and horizontal correction amount data from the system data, and supplies the correction amount data to the camera shake correction controller 29.

FIG. 4 is a block diagram of a camera shake correction controller of the video camera apparatus according to the present invention. Note that the camera shake correction in this example uses resampling control.

The camera shake correction controller 29 is a vertical correction amount calculator 3 for calculating an actual correction value in a memory based on the correction amount data supplied from the signal processing microcomputer 27.
2 and a horizontal correction amount calculator 33, an address generator 34 for generating an address based on the actual correction amount calculated by the vertical direction correction amount calculator 32 and the horizontal direction correction amount calculator 33, and a video memory 28. It comprises a control signal generator 35 for controlling and a timing generator 36.

The vertical correction amount data supplied from the signal processing microcomputer 27 is supplied to a vertical correction amount calculator 32. On the other hand, the horizontal correction amount data supplied from the signal processing microcomputer 27 is supplied to a horizontal correction amount calculator 33. The vertical direction correction calculator 32 and the horizontal direction correction calculator 33 cut out a part of the image data stored on the video memory 28 in accordance with the camera shake correction amount and direction detected by the motion detection sensor provided in the video camera device 1. To calculate an actual correction value. The calculation result is supplied to the address generator 34.

The address generator 34 determines the vertical and horizontal screen movement amounts based on the calculation result. Based on this screen movement amount, the reading start address ad1 of the video memory 28 is set as shown in FIG.

The read start address output from the address generator 34 is supplied to the video memory 27 together with each control signal from the control signal generator 35.

The video memory 28 of FIG. 3 cuts out and outputs a part of the image data stored in the video memory 28 based on the read address. The output of the clipped video memory 28 is data in an area smaller than a normal screen area based on the read start address ad1.

The data in this small area is interpolated by the filter 30 and enlarged to a normal screen size as shown in FIG. 5B.

The image data interpolated by the filter 30 is converted into an analog video signal by a D / A converter 31 and supplied to a video signal output port (not shown).

Therefore, the video reproducing apparatus 20 according to the present invention
Can perform camera shake correction based on the correction amount data and the image data recorded on the tape 21.

In the embodiments of the present invention, an example of a camera shake detection method and a camera shake correction method has been described, but the camera shake detection method and the camera shake correction method employed in the present invention are not limited to these methods. Instead, various configurations may be taken within the scope of the present invention.

[0042]

According to the video camera apparatus of the present invention, a camera shake correction signal is detected by a camera shake detection section provided in the video camera apparatus, and the camera shake correction signal can be recorded on a tape. Also, the video playback device according to the present invention,
Camera shake correction can be performed by a camera shake correction unit provided in the video playback unit.

Therefore, the video camera apparatus according to the present invention does not include a camera shake correction unit, and therefore is smaller in size than a conventional video camera with a camera shake function having two camera shake detection units and a camera shake correction unit. In addition, the weight can be reduced.

If the data of the correction amount of the camera shake correction is recorded on the tape, the camera shake can be corrected even if the recorded video data has not been corrected.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a video camera device according to the present invention.

FIG. 2 is an example of a pack for recording correction amount system data.

FIG. 3 is a configuration diagram of a video playback device according to the present invention.

FIG. 4 is a configuration diagram of a camera shake correction controller of the video camera device according to the present invention.

FIG. 5 is a diagram showing screen addresses of a video memory.

[Explanation of symbols]

2 motion detector, 3 correction signal generator, 4 lens, 5
Image pickup unit, 6 error correction coding and synthesis processing unit, 27 signal processing microcomputer, 29 camera shake correction controller

Claims (2)

[Claims] 1. A shake amount detecting means for detecting a shake amount of an image caused by a shake of a video camera apparatus main body, an image pickup means for picking up an image of a subject and generating a video signal, and an image output from the shake detecting means. A video camera device comprising: a signal synthesizing unit that synthesizes a shake amount and a video signal output from the imaging unit; and a unit that records a synthesized signal of the shake amount and the video signal output from the signal synthesizing unit on a recording medium. 2. A reproducing means for reproducing a synthesized signal from a recording medium which records a synthesized signal obtained by synthesizing a video signal obtained by imaging a subject and a shake amount of an image caused by a shake of a video camera device main body. A signal dividing unit that divides a swing amount and a video signal from a combined signal obtained by combining a shake amount of an image caused by the shake of the video camera apparatus body played back by the playback unit and a video signal obtained by capturing an image of a subject; Means for correcting image fluctuation of a video signal divided by the signal dividing means based on the amount of shaking divided by the signal dividing means.