Victor Company of Japan, Limited

Takuya Tsushima

Akira Hirota

Hiroyuki Kitamura

Tetsuya Suwa

Seiji Higurashi

Takashi Shinozaki

Masaji Yoshida

Kosuke Kinoshita

Naomichi Nishimoto

Takashi Uchimi

Shinji Hirano

Nobuyoshi Suzuki

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 magnetic recording/reproducing apparatus equipped with a rotating drum having on its circumferential surface video signal heads for recording and reproducing a video signal on and from a recording medium and PCM signal heads for recording and reproducing a PCM audio signal on and from the recording medium. The apparatus further comprising at least a video signal irregularity detecting circuit for detecting a disturbance of the video signal. When detecting the disturbance of the video signal, the irregularity detecting circuit interrupts the recording of the PCM audio signal onto the recording medium in the case that the apparatus simultaneously records the video signal and PCM audio signal.

Video tape recorder with PCM audio recording with device for detecting

A magnetic tape is wound on a rotary drum through a predetermined angular range greater than a standard tape winding angle. The predetermined angular range has a first portion corresponding to the standard tape winding angle and a second portion extending outward of the first portion. A main information signal is recorded into a main information recording track on the magnetic tape which extends in a region corresponding to the first portion of the predetermined angular range. A sub information signal is recorded into a sub information recording track on the magnetic tape which extends along an extension line of the main information recording track and which extnds in a region corresponding to the second portion of the predetermined angular range. A plurality of magnetic heads have different track widths respectively and are mounted on the rotary drum. The magnetic heads form respective different tracks which together constitute the sub information recording track.

Magnetic video tape recording and reproducing apparatus

A code-error correcting device which comprises a circuit for generating a pseudo-random or quasi-random function and which computes the EXCLUSIVE OR of digital information and an output of the circuit for generating the pseudo-random function and further supplies the computed value of the EXCLUSIVE OR to a digital modulator as an input thereof and in which an initial value for generating the pseudo-random function by the circuit for generating the pseudo-random function is set to be the address information or data block information related to the address information. Thereby, the receiving system can stably perform synchronous detection and bit synchronization on the basis of these turning points. Further, the capability of detecting address errors can be improved or increased and omission of the address error can be decreased.

Code-error correcting device

A video signal reproducing apparatus comprises a reproducing circuit for reproducing from a recording medium a pre-recorded video signal having field correlation and having a predetermined band, and a noise reduction circuit supplied with a reproduced video signal from the reproducing circuit for essentially reducing noise included within the reproduced video signal. The noise reduction circuit comprises first and second subtracting circuits supplied with the reproduced video signal from the reproducing circuit, a one-field delay circuit for delaying an output of the first subtracting circuit by a predetermined time period and for supplying a delayed signal to the second subtracting circuit, which predetermined time period is equal to one field or a time period which is a natural number multiple of one horizontal scanning period and is extremely close to one field, and a limiter for amplitude-limiting an output of the second subtracting circuit and for supplying an amplitude limited signal to the first subtracting circuit. The output of the first subtracting circuit is obtained as an output of the noise reduction circuit. The one-field delay circuit has a transmission band which is narrower than a band of the reproduced video signal.

Video signal reproducing apparatus having a noise reduction circuit

A multiplexed color video signal recording and reproducing apparatus comprises a first circuit for producing a time division multiplexed signal in which one or two compressed color difference signals are multiplexed with the phase inverted for every predetermined horizontal scanning periods, a second circuit for producing a multiplexed color video signal by multiplexing the time division multiplexed signal with a non-compressed luminance signal, a third circuit for recording and reproducing the output signal of the second circuit on and from a recording medium, a comb filter circuit supplied with a reproduced signal from the third circuit, a fourth circuit for obtaining reproduced signals of the first and second color difference signals from an output reproduced time division multiplexed signal of the comb filter circuit, an encoder for producing a carrier chrominance signal from the output signals of the fourth circuit, and a fifth circuit for producing a reproduced color video signal by multiplexing the carrier chrominance signal and the reproduced luminance signal from the comb filter circuit.

Multiplexed color video signal recording and reproducing apparatus

A video signal recording and reproducing apparatus comprises a circuit for separating a luminance and carrier chrominance signals from a color video signal and for recording on and reproducing from a recording medium a multiplexed signal in which a frequency modulated luminance signal and a frequency converted carrier chrominance signal which is frequency-converted into a low frequency band are multiplexed, a circuit for obtaining a reproduced luminance signal, a circuit for obtaining a reproduced carrier chrominance signal which is in an original frequency band and has an original phase by subjecting a reproduced frequency converted carrier chrominance signal to a signal processing, a de-emphasis circuit supplied with the reproduced luminance signal and/or an input signal or the reproduced carrier chrominance signal of the processing circuit, for relatively attenuating the level of a high-frequency component in a temporal frequency of the reproduced luminance signal and/or an input signal or the reproduced carrier chrominance signal of the processing circuit compared to a low-frequency component, and a mixer for mixing the reproduced luminance signal and the reproduced carrier chrominance signal so as to produce a reproduced color video signal.

Video signal recording and reproducing apparatus having a pre-emphasis

A video signal delay circuit comprises a plurality of rows of input horizontal transfer registers, a plurality of input vertical transfer gates, a plurality of columns of vertical transfer registers, a plurality of output vertical transfer gates, a plurality of rows of output horizontal transfer registers, a horizontal transfer clock pulse generating circuit, a vertical transfer clock pulse generating circuit, and a selecting circuit. The selecting circuit selectively supplies a horizontal transfer clock pulse to an arbitrarily selected one of the plurality of rows of input horizontal transfer registers and to an arbitrarily selected one of the plurality of rows of output horizontal transfer registers based on at least horizontal and vertical synchronizing signals within an input composite video signal. The selecting circuit supplies the input composite video signal to the arbitrarily selected one of the plurality of rows of input horizontal transfer registers and selectively obtains an output composite video signal of only the arbitrarily selected one of the plurality of rows of output horizontal transfer registers.

Video signal delay circuit

A video signal delay circuit comprises an input horizontal transfer register supplied serially with an input composite video signal, an input vertical transfer gate, a plurality of columns of vertical transfer registers, an output vertical transfer gate, an output horizontal transfer register, a horizontal transfer clock pulse generating circuit, a vertical transfer clock pulse generating circuit and a vertical transfer gate pulse generating circuit. The vertical transfer clock pulse generating circuit generates a vertical transfer clock pulse at a rate of once per one horizontal scanning period of the input composite video signal and additionally generates one or more vertical transfer clock pulses during a specific time period. Or, the horizontal transfer clock pulse generating circuit generates a horizontal transfer clock pulse having a selected phase or a selected number of horizontal transfer clock pulses.

A recording and reproducing apparatus for recording a carrier chrominance signal, comprises a separating circuit for separating a carrier chrominance signal from a color video signal, a recording signal processing circuit for converting the carrier chrominance signal into a carrier chrominance signal having a signal format suited for recording and reproduction, a recording circuit for recording an output signal of the recording signal processing circuit on a recording medium, a reproducing circuit for reproducing the recorded signal from the recording medium, a reproduced signal processing circuit for converting the reproduced signal from the reproducing circuit into a reproduced carrier chrominance signal having an original signal format, and a de-emphasis circuit responsive to the reproduced carrier chrominance signal from the reproduced signal processing circuit, for subjecting the reproduced carrier chrominance signal to a de-emphasis so that a high-frequency component in a vertical spatial frequency of the reproduced carrier chrominance signal is relatively attenuated compared to a low-frequency component of the reproduced carrier chrominance signal.

Recording and reproducing apparatus for recording and reproducing a

A noise reducing system for a video signal, comprises a vertical pre-emphasis circuit supplied with an input video signal which is to be transmitted, for pre-emphasizing the input video signal and transmitting a pre-emphasized video signal to a transmitting system, and a vertical de-emphasis circuit supplied with a pre-emphasized video signal which is pre-emphasized by the vertical pre-emphasis circuit and is transmitted through the transmitting system, for de-emphasizing the pre-emphasized video signal. The vertical pre-emphasis circuit has a non-linear pre-emphasis characteristic for relatively emphasizing a high-frequency component of the input video signal in a vertical spatial frequency of a picture compared to a low-frequency component of the input video signal, with the degree of emphasis being reduced as the level of the input video signal increases. The vertical de-emphasis circuit has a non-linear de-emphasis characteristic for relatively attenuating a high-frequency component of the pre-emphasized video signal in a vertical spatial frequency of the picture compared to a low-frequency component of the pre-emphasized video signal, with the degree of attenuation being reduced as the level of the pre-emphasized video signal increases.

Noise reducing system for video signal

A noise reducing system for a video signal comprises a vertical pre-emphasis circuit supplied with an input video signal which is to be transmitted, for supplying an output signal to a transmission system, and a vertical de-emphasis circuit supplied with the video signal which has been pre-emphasized in the vertical pre-emphasis circuit and has been transmitted through the transmission system. The vertical pre-emphasis circuit has a characteristic for relatively emphasizing the level of high-frequency components of the input video signal having spatial frequencies in a vertical direction of a picture, compared to low-frequency components of the input video signal. On the other hand, the vertical de-emphasis circuit has a characteristic for relatively attenuating the level of the high-frequency components of the pre-emphasized video signal having spatial frequencies in the vertical direction of the picture, compared to the low-frequency components of the pre-emphasized video signal. The characteristics of the vertical pre-emphasis circuit and the vertical de-emphasis circuit cooperate so as to reduce noise having high spatial frequencies in the vertical direction of the picture.

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Ayase, Japan

Takuya Tsushima