Victor Company of Japan, Limited

Masaji Yoshida

Tetsuya Suwa

Takuya Tsushima

Takashi Shinozaki

Hiroyuki Kitamura

Kosuke Kinoshita

Yasutoshi Matsuo

Hironao Sakaguchi

An imaging apparatus comprises: a color separation optical system for separating an image ray into blue, green, and red image rays, image sensors, having pixels vertically and horizontally arranged, for receiving the image rays and producing blue, red, and green signals wherein at least one of image sensors for blue and red signals has a vertical relative offset against the image sensor for green signal to have a relative interlace relation with the image sensor for blue or red color signal, to produce a screen to be produced, having a higher resolution than these image sensors. A vertical high frequency component is operated from the blue and red signals and is added to the green color signal to produce a second green signal indicative of a green luminance value at a position corresponding to each pixel of the image sensors for blue and red color signals to increase the vertical resolution of the screen. A fourth image sensor for green and a separation optical system for the fourth image sensor may be provided to increase a horizontal resolution by arranging the fourth image sensor to have a horizontal offset to have a second relative interlace relation with the image sensor for green. The image sensor for blue and red may have a vertical offset to eliminate the necessity of a field memory to operate the vertical high frequency component.

Imaging apparatus including offset pixels for generating vertical high

An imaging apparatus comprises: a color separation optical system for separating an image ray into blue, green, and red image rays, image sensors, having pixels vertically and horizontally arranged, for receiving the image rays and producing blue, red, and green signals wherein at least one of image sensors for blue and red signals has a vertical relative offset against the image sensor for green signal to have a relative interlace relation with the image sensor for blue or red color signal, to produce a screen to be produced, having a higher resolution than these image sensors. A vertical high frequency component is operated from the blue and red signals and is added to the green color signal to produce a second green signal indicative of is a green luminance value at a position corresponding to each pixel of the image sensors for blue and red color signals to increase the vertical resolution of the screen. A fourth image sensor for green and a separation optical system for the fourth image sensor may be provided to increase a horizontal resolution by arranging the fourth image sensor to have a horizontal offset to have a second relative interlace relation with the image sensor for green. The image sensor for blue and red may have a vertical offset to eliminate the necessity of a field memory to operate the vertical high frequency component.

A contour compensation circuit comprises a first delay circuit to generate a first signal that is the image signal delayed by a first required time, a second delay circuit to generate a second signal that is the result of addition of the input image signal and the signal that is the input image signal delayed by twice the required time, a subtractor circuit that generates a third signal that is the first signal subtracted by the second signal, an adder circuit that adds the first signal and third signal and outputs contour compensation signal, and a control circuit to control the ratio of addition of the third signal in response to the second signal. On the basis of the second signal, the control circuit is configured from a voltage control amplifier (VCA) that controls a voltage gain of a signal so that the higher a level of the second signal is the larger a contour compensation amount becomes.

Contour compensation circuit for a signal processing apparatus of an

A noise reduction circuit for a video signal recording and/or reproducing apparatus comprises a high pass filter for extracting high frequency signal component form the input luminance signal, a limiter circuit for limiting the high frequency signal component, a multiplier for determining the degree of preemphasis and/or deemphasis by multiplying the limited signal, and summing and subtracting circuits respectively for adding and subtracting the high frequency signal component processed by the limiter circuit and the multiplier to and from the original luminance signal. The limiter circuit has an amplitude characteristic which changes a gradient so as to have a characteristic curve of at least three different gradient slopes interconnected in succession with an increase in amplitude of the signal supplied thereto.

Noise Reducing circuit of a video signal

In a noise reducing circuit for a video signal comprising a first subtractor (2), a delay line (3), a second subtractor (4), a non-linear circuit (7) having a full-wave rectification circuit (7b) and a gain control circuit (7a), the gain control circuit (7a) controls a gain such that an output signal level derived from the non-linear circuit (7) increases in accordance with the increase in an output signal from the full-wave rectification circuit (7b) when the output signal level of the second subtractor (4) is within a determined extent, and that the output signal level derived from the non-linear circuit (7) decreases in accordance with the increase in the output signal from the full-wave rectification circuit (7b) when the output signal level of the second subtractor (4) is out of the determined extent.

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Fujisawa, Japan

Masaji Yoshida