JPH06339108A - Image pickup device - Google Patents

Abstract

(57) [Summary] [Object] In an imaging device such as a video camera, various characteristics of a signal processing circuit for generating a video signal can be optimally changed according to the type of the storage medium or the storage device of the video signal. To do so. [Structure] An image pickup signal photoelectrically converted by a CCD (image pickup device) 2 is sent to a camera signal processing circuit 3 and converted into a video signal of a predetermined video system. Then, the recorder signal processing circuit 5 records the video signal in the storage device 6 and outputs it as a standard television signal. Further, the storage device discriminating means 7 discriminates the type of the storage medium of the storage device 6, selects the contour emphasizing center frequency of the contour emphasizing circuit 4 according to the discrimination result, and changes the characteristics in the camera signal processing circuit 3 to the optimum. Let

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image pickup device such as a video camera (camera integrated VTR).

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing a schematic configuration of a conventional video camera. In the figure, 1 is a lens for imaging,
The image pickup light incident on the lens 1 forms an image on the light receiving surface of the CCD 2, where photoelectric conversion is performed to generate electric charges according to the amount of incident light. The electric signal generated by the generation of the charges is sent to the camera signal processing circuit 3, where various signal processing is performed by the contour emphasis circuit 4 and the like, and then sent to the recorder signal processing circuit 5 as a video signal.

The recorder signal processing circuit 5 performs predetermined signal processing for outputting the video signal from the camera signal processing circuit 3 as a standard TV (television) signal, and records it in the storage device 6 and stores it. The information recorded in the device 6 is read, reproduced, and output as a standard TV signal. At that time, the storage device 6 has respective storage media satisfying two kinds of standards, for example, A and B,
Video signals are recorded and reproduced in accordance with those standards.

[0004]

However, in the conventional image pickup apparatus as described above, various characteristics of the camera signal processing circuit cannot be changed depending on the type of the storage medium of the storage device, and the type of the storage medium is different. However, there is a problem in that appropriate signal processing cannot be performed according to the above.

Further, when there are a plurality of storage devices, various characteristics of the camera signal processing circuit cannot be changed depending on the type of the storage devices, and similarly, proper signal processing cannot be performed.

The present invention has been made in view of the above problems, and changes various characteristics of a signal processing circuit for generating a video signal of a predetermined system according to the type of a storage medium or a storage device. It is an object of the present invention to provide an imaging device capable of performing appropriate signal processing.

[0007]

The image pickup device of the present invention is configured as follows.

(1) An image pickup device for converting an imaged optical signal into an electric signal, a signal processing circuit for converting the electric signal into a video signal of a predetermined video system, and the converted video signal by a predetermined recording system. The recording means and the reproducing means are effective for a plurality of recording systems, and the signal processing circuit operates according to the recording system. It has a control function that can change the characteristics.

(2) An image pickup device for converting an imaged optical signal into an electric signal, a signal processing circuit for converting the electric signal into a video signal of a predetermined video system, and the converted video signal by a predetermined recording system. The recording means includes a recording means for recording in a storage medium, a reproducing means for reading out and reproducing the recorded video signal, and a selecting means for selecting a recording method thereof. The recording means and the reproducing means are effective for a plurality of recording methods. The signal processing circuit has a control function capable of changing the characteristics according to the recording method.

(3) An image sensor for converting an imaged optical signal into an electric signal, a signal processing circuit for converting the electric signal into a video signal of a predetermined video system, and the converted video signal by a predetermined recording system. The storage device includes a recording unit for recording in a plurality of storage devices and a reproduction unit for reading and reproducing the recorded video signals, and the signal processing circuit has a control function capable of changing the characteristics according to the type of the storage device. I did it.

(4) In the image pickup apparatus according to any one of (1) to (3) above, the control function capable of changing the characteristics of the signal processing circuit includes a contour enhancement function of the video signal.

(5) In the image pickup apparatus according to (2), the selecting means selects the recording method according to the physical characteristics of the storage medium.

(6) In the image pickup apparatus according to (2), the selecting means selects the recording method according to the chemical characteristics of the storage medium.

(7) In the image pickup apparatus of (2) above, the selecting means selects the recording method according to the electrical characteristics of the storage medium.

(8) In the image pickup apparatus according to (2), the selecting means selects the recording method by a switching signal from the outside.

[0016]

In the image pickup apparatus of the present invention, since a control function for changing various characteristics is added to the signal processing circuit for generating a video signal of a predetermined system, an appropriate signal according to the type of the storage medium or the storage apparatus is provided. Processing is performed.

[0017]

1 is a block diagram showing the configuration of an embodiment of the present invention, and the same reference numerals as those in FIG. 3 denote the same components. In the figure, 1 is an image pickup lens, 2 is a CCD (image pickup element) for converting an imaged optical signal into an electric signal, and 3 is a camera signal processing circuit for converting the electric signal into a video signal of a predetermined video system, A contour enhancement circuit 4 is provided which has a control function capable of changing the characteristics according to the recording method of the video signal and which implements the contour enhancement function.

A recorder signal processing circuit 5 constitutes a recording means for recording the converted video signal in a storage medium of the storage device 6 by a predetermined recording method and a reproducing means for reading and reproducing the recorded video signal. Thus, it is effective for a plurality of recording methods and outputs standard TV signals.

Reference numeral 7 denotes a storage device discriminating means for discriminating the type of the storage medium of the storage device 6 and discriminating whether or not the storage medium complies with the standard A or the standard B described above. Reference numeral 8 is a center frequency switching means for switching the center frequency of the contour emphasizing circuit 4 according to the output of the storage device discriminating means 7, and 9 is a selecting means for selecting the recording method.

Next, the operation will be described. Similar to the circuit of FIG. 3, the image pickup light incident on the CCD 2 through the lens 1 is photoelectrically converted here, and is sent to the camera signal processing circuit 3.
It becomes a video signal of a predetermined system. This video signal is further sent to the recorder signal processing circuit 5 and recorded in the storage device 6 by the recording method selected by the selection means 9 and at the same time as the standard T
It is output to the outside as a V signal. At that time, the standard of the storage medium of the storage device 6 is discriminated by the storage device discriminating means 7, and the center frequency of the contour emphasizing circuit 4 is switched by the center frequency switching means 8 according to the discrimination result.

If the difference between the A standard and the B standard is the difference in the modulation frequency of the luminance signal of the standard TV signal in the storage device 6, the difference is read out from the storage device 6 and the recorder signal processing is performed. The high cutoff frequency of the luminance signal component of the standard TV signal output from the circuit 5 is different.

Therefore, in the present embodiment, as described above, the storage device discriminating means 7 discriminates whether the storage medium of the storage device 6 conforms to the A standard or the B standard, and both standards. The center frequency switching means 8 sends a switching signal to the contour emphasizing circuit 4 so as to select an appropriate contour emphasizing center frequency according to the difference in the high cutoff frequency.

Therefore, even if the recording medium conforms to either the A or B standard, it is possible to obtain the optimum contour enhancement characteristic according to the type thereof, and the camera signal processing circuit 3 can properly adjust the characteristics. Various signal processing can be performed.

The selection means 9 for selecting the recording method is
For example, the recording method may be selected according to the physical characteristics of the storage medium of the storage device 6, or the recording method may be selected according to the chemical characteristics or electrical characteristics of the storage medium. You may make it select by a signal.

FIG. 2 is a block diagram showing the configuration of another embodiment of the present invention. In this embodiment, the video signal from the camera signal processing circuit 3 is recorded in a plurality of storage devices 6a and 6b, and which storage device 6a or 6b is operating by the storage device discriminating means 10. And the contour emphasizing circuit 4 according to the output of the storage device discriminating means 10.
The center frequency of is switched.

In such a configuration, for example, when the difference between the storage devices 6a and 6b is the difference in the modulation frequency of the luminance signal in the standard TV signal as in the above-described embodiment, as a result, the storage device 6a or 6b is used. The high cutoff frequency of the luminance signal component of the standard TV signal read out and output from the recorder signal processing circuit 5 is different.

Therefore, in this embodiment, the storage device discriminating means 1
It is determined by 0 which of the storage devices 6a and 6b is in operation, and an appropriate contour emphasis center frequency is selected according to the difference in the high cutoff frequencies of the two.

As described above, the characteristics of the camera signal processing circuit 3 can be changed according to the types of the storage devices 6a and 6b, and proper signal processing can be performed.

In each of the above-described embodiments, the case where the center frequency of the contour emphasizing circuit 4 is switched according to the outputs of the storage device discriminating means 7 and 10 has been described. Can be anything that is optimized. That is, it suffices that the characteristics of the camera signal processing circuit 3 change optimally.

[0030]

As described above, according to the present invention, various characteristics of a signal processing circuit for generating a video signal of a predetermined system can be changed according to the type of a storage medium or a storage device, and it is possible to change the characteristics appropriately. An effect that signal processing can be performed is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of another embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

 2 CCD (imaging device) 3 camera signal processing circuit 4 contour enhancement circuit 5 recorder signal processing circuit (recording means, reproducing means) 6, 6a, 6b storage device 7, 10 storage device discriminating means 8 center frequency switching means 9 selecting means

Claims (8)

[Claims] 1. An image pickup device for converting an imaged optical signal into an electric signal, a signal processing circuit for converting the electric signal into a video signal of a predetermined video system, and a converted video signal stored in a predetermined recording system. A recording means for recording the medium and a reproducing means for reading and reproducing the recorded video signal;
An image pickup apparatus characterized in that the recording means and the reproducing means are effective for a plurality of recording methods, and the signal processing circuit has a control function capable of changing characteristics according to the recording methods. 2. An image sensor for converting an imaged optical signal into an electric signal, a signal processing circuit for converting the electric signal into a video signal of a predetermined video system, and the converted video signal stored in a predetermined recording system. The recording means for recording on the medium, the reproducing means for reading and reproducing the recorded video signal, and the selecting means for selecting the recording method are provided, and the recording means and the reproducing means are effective for a plurality of recording methods. An image pickup apparatus characterized in that the processing circuit has a control function capable of changing characteristics according to the recording method. 3. An image pickup device for converting an imaged optical signal into an electric signal, a signal processing circuit for converting the electric signal into a video signal of a predetermined video system, and a plurality of the converted video signals by a predetermined recording system. Recording means for recording in the storage device and reproducing means for reading and reproducing the recorded video signal, and the signal processing circuit has a control function capable of changing the characteristics in accordance with the type of the storage device. An imaging device characterized by. 4. The image pickup apparatus according to claim 1, wherein the control function capable of changing the characteristic of the signal processing circuit includes a contour enhancement function of a video signal. 5. The image pickup apparatus according to claim 2, wherein the selection means selects the recording method according to the physical characteristics of the storage medium. 6. The image pickup apparatus according to claim 2, wherein the selection means selects the recording method according to the chemical characteristics of the storage medium. 7. The image pickup apparatus according to claim 2, wherein the selection means selects the recording method according to the electrical characteristics of the storage medium. 8. The image pickup apparatus according to claim 2, wherein the selection means selects the recording method by a switching signal from the outside.