Canon Kabushiki Kaisha

Tsutomu Fukatsu

Yoshihiro Nakatani

Toshiyuki Masui

Kenichi Nagasawa

Tadayoshi Nakayama

Masahiro Takei

Motokazu Kashida

Koji Takahashi

Chikara Sato

Hisataka Hirose

Makoto Shimokoriyama

Kouji Takahashi

Takashi Kobayashi

Shinji Sakai

Teruo Hieda

Taizou Hori

Tomohiko Sasatani

Tetsuya Wakui

Takeshi Suzuki

Kyoji Tamura

Koichi Ueda

Kosuke Nobuoka

A data output apparatus converts input data into data that changes less than the input data, and outputs the converted data to a memory.

Data output apparatus, memory system, data output method, and data processing method

A reconfigurable data processing device equipped with a plurality of data processing units controls timing of switching contents of data processing executed by each of the plurality of data processing units for each of a plurality of data processing operations.

Reconfigurable data processing device and method

An image sensing apparatus includes: a signal processing circuit for processing image sensing signals; a plurality of adjustment signal generating circuits for generating mutually different output signals for automatic adjustment by using part of the signals of the signal processing circuit; an interface for receiving the output of the plurality of adjustment signal generating circuits and outputting it through a common signal path. Also included is a control microprocessor for adjusting a plurality of adjusting sections of the image sensing apparatus by using the output of the plurality of adjustment signal generating circuits output through the common signal path, wherein adjustment of the plurality of adjusting sections of the image sensing apparatus using the output of the plurality of adjustment signal generating circuits is effected with a reduced number of signal paths between the plurality of adjustment signal generating circuits and the control microprocessor, thereby simplifying the circuit construction of the image sensing apparatus as a whole and improving the reliability thereof.

Image sensing apparatus having common circuitry for processing digital adjustment signals

Color separating characteristics which are preferable in case of obtaining the primary color components are obtained from an image pickup signal by using a color separation matrix. A luminance signal is obtained by a luminance signal formation processing section from the signal supplied from an image pickup device through an A/D converter and chrominance signals are obtained by a chrominance signal separation processing section. In the chrominance signal separation processing section, the signals obtained from the image pickup signal are multiplied with a color separation matrix, thereby obtaining primary color components RGB. The color separation matrix is constructed by coefficients for white balance adjustment and coefficients for adjustment in consideration of the primary color components of the image pickup signal.

Image pickup apparatus having a complementary color-to-primary color conversion matrix

A video memory device is provided with a memory circuit, a write control circuit for controlling writing to the memory circuit by utilizing the horizontal synchronizing signal of a video signal input to the memory circuit, and a read control circuit for controlling reading from the memory circuit by utilizing the horizontal synchronizing of a video signal output from the memory circuit.

Video memory device for processing a digital video signal comprising a

A carrier chrominance signal forming device is provided with input parts for receiving a plurality of kinds of complementary color signals and a carrier chrominance signal forming part for forming a carrier chrominance signal by performing computing operations on the complementary color signals received by the input parts. These parts are arranged to enable the device to stably form a carrier chrominance signal from the complementary color signals with a compact circuit arrangement.

Carrier chrominance signal forming device

An image pickup apparatus including an image pickup device to convert an image pickup light from an object to be photographed into an electric signal, a signal processing circuit to obtain a luminance component signal and color difference component signals on the basis of an output of the image pickup device and a color separation matrix circuit to obtain chrominance signals from the luminance component signal and the color difference component signals. Matrix coefficients in the color separation matrix circuit are determined so as to obtain the optimum chrominance signals when the luminance component signal and the color difference component signals obtained by photographing an object of each color are color separated.

Image pickup apparatus having color separation matrix

Image sensing apparatus having common circuitry for processing digital

A color image pickup apparatus using a single-plate type solid-state image sensor is arranged to obtain a signal of an excellent color separation characteristic. An object image is formed on the photoelectric conversion part of the image sensor with color filters of different colors disposed on each of the picture elements of the image sensor. A signal outputted from the solid-state image sensor is converted into a digital signal by an A/D converter. The digital signal is taken in by a signal processing circuit to separate chrominance signals superposed on a luminance signal. At that time, signals for primary color components are formed by carrying out a matrix computing process by using coefficients obtained from the image pickup output of the solid-state image sensor.

Image pickup apparatus including matrix computing process which uses

A gamma correction circuit for converting N-bit input data into M-bit output data by using a gamma correction curve approximated by a polygonal line having a plurality of straight line sections each having a different slope, the gamma correction circuit including a calculation circuit for executing conversion calculation for each the straight line section; and a control circuit for controlling the calculation circuit in accordance with a value of the input data so that the calculation circuit executes the conversion calculation for each the straight line section corresponding to the value.

Gamma correction circuit approximating non-linear digital conversion

A video signal reproducing apparatus for reproducing a video signal from a recording medium includes a rotary head arranged to periodically trace the recording medium and reproduce the recorded video signal, a memory arranged to receive the video signal reproduced by the rotary head, memory control circuitry for controlling writing into and reading from the memory, a rotation controller for controlling rotation of the rotary head; and mode setting circuitry for setting the apparatus into one of a plurality of modes including first and second still picture reproduction modes. In both modes, stored signals are repetitively read from the memory with reading address resetting occurring in the course thereof. In the first mode, which involves short term reproduction, the rotary head is caused to rotate and the resetting is dependent of detection of phase detection of the rotary head. In the second mode, which involves long term reproduction, rotation of the rotary head is discontinued and resetting is attained without dependence on phase detection.

Video signal reproducing apparatus having diverse still picture

A color signal processing device for processing a carrier chrominance signal is arranged to produce a first sampling signal by sampling the carrier chrominance signal according to a sampling clock signal synchronized with a reference phase of the carrier chrominance signal and a second sampling signal which is of a sampling phase opposite to that of the first sampling signal and to form baseband signals conforming to a color signal by using the first and second sampling signals. This arrangement enables the device to process the color signal without causing any signal deterioration that tends to result from DC fluctuations of the carrier chrominance signal.

Apparatus for the demodulation of a carrier chrominance signal into

A video signal processing device displaying both image and process information includes multiplexing circuitry for multiplexing a second video signal with a first video signal. Control circuitry is provided for controlling a multiplexing ratio of the first and second video signals in the multiplexing circuitry. A display is provided for simultaneously displaying at least a part of a video image which corresponds to the first video signal, and also for displaying a state of the multiplexing operation being performed by the multiplexing circuitry under the control of the control circuitry. Preferably, only a peripheral portion of the image is faded in the view finder. Alternatively, a bar graph on the side of the image in the view finder indicates the degree of fading the image is subjected to.

Video signal processing apparatus displaying image and process

An apparatus for processing an interlaced video signal having (2n+1) horizontal scanning lines (n: an integer) for one frame, which consists of two fields, is provided with a memory capable of storing at least an (n+1) horizontal scanning line portion of the video signal. The apparatus is arranged to reset the reading address of the memory alternately at an interval of n horizontal scanning periods and at an interval of (n+1) horizontal scanning periods and to reset the writing address of the memory in response to the front edge of a vertical synchronizing signal included in the input video signal.

Video signal processing apparatus for restoring an interlaced video

A video signal processing device is arranged to obtain a signal representing a difference between an input video signal and a signal read out from a memory to which either the input video signal or an input video signal is supplied, to supply the difference signal to a multiplier which uses a variable coefficient, and to add the output of the multiplier to the input video signal.

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Kanagawa, Japan

Tsutomu Fukatsu