Canon Kabushiki Kaisha

Makoto Shimokoriyama

Yoshiki Ishii

Motokazu Kashida

Shinichi Yamashita

Tetsuya Shimizu

Teruo Hieda

Akio Fujii

Akio Aoki

Akiyoshi Hamanaka

Yukinori Yamamoto

Izumi Matsui

Koji Takahashi

Yasuyuki Tanaka

Katsuji Yoshimura

Tsutomu Fukatsu

Toshihiro Yagisawa

Shinji Sakai

Kenichi Nagasawa

Naoto Abe

Masahiro Takei

Masahiko Enari

Shinji Ohnishi

Hidenori Hoshi

Katsumi Karasawa

Masato Kato

Susumu Kozuki

Mitsugu Tanaka

Mitsuo Niida

Shingo Nozawa

Tomohiko Sasatani

Akihiro Skikakura

An apparatus has a plurality of rotary heads for reproducing digital data from a recording medium, and delays a reference signal phase-locked with the rotary heads on the basis of the detection output of predetermined reference data in the reproduced digital data, thereby generating a signal indicating the reproducing start timing of the digital data by the plurality of rotary heads.

Digital data reproducing apparatus

A digital signal coding apparatus for controlling the coding operation of a coding unit so as to obtain predetermined information amount and for recording into a predetermined recording packet. The apparatus has a control circuit to control the coding operation of the coding unit so as to generate a writing area of a predetermined amount in the recording packet.

Digital signal coding apparatus

An object of the present invention is to provide a digital VTR wherein, without increasing a transmission rate of an image memory and a data bus corrected thereto, a double error correction coding and decoding process can be achieved. In order to achieve the object, an input and output memory for storing an image data according to an input and an output formats, and a recording and reproducing memory for storing the image according to an image format are provided. To the input and output memory , via an input and output bus , an input and output circuits and is corrected. In data transmission between the input output memory and the recording and reproducing memory , a format conversion, and coding and decoding of an external code are performed. To the recording and reproducing memory , via recording and reproducing bus , inner coding and decoding circuits A and B are corrected.

Image processing apparatus

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

An image reproducing apparatus reproduces an encoded image signal, detects a motion vector of a block including undecodable image signal by using the reproduced image signal, and structuring an image signal for the block including the undecodable signal by using the motion vector to reproduce a visually high quality image even when the block including the undecodable image signal moves.

Protecting image quality from occurrence of uncorrectable errors

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

An encoding apparatus includes an input section which inputs image data, and a calculating section which calculated DCT coefficients of a predetermined frequency region on the basis of the image data. A decision unit judges a correlation of the image data on the basis of the DCT coefficients calculated by the calculating section, and a transforming section performs an orthogonal transformation to the image data in accordance with an output of the decision unit. An encoding section encodes the image data transformed by the transforming section. Also included is an encoding and decoding apparatus having an input section which inputs information data, and an orthogonal transforming section which performs an orthogonal transforation of the input information data. An encoding section encodes the transformation data transformed by the orthogonal transforming section, and a decoding section decodes the encoding data encoded by the encoding section by using the orthogonal transforming section.

Encoding/decoding apparatus which performs an inverse orthogonal

A signal recording apparatus, for recording a TV signal in which an audio signal such as a MUSE signal and a video signal are multiplexed in a time sharing manner in units of a given period of time, is arranged to code these video and audio signals alike, to dispersively allocate a discretely separated audio signal within the video signal, and to provide symbols other than the symbols the audio and video signals within each of synchronizing block for the purpose of permitting the use of other video signal recording apparatuses. The arrangement permits simplification and high-quality of the apparatus for recording the signals of this kind and thus contributes to the popularization of the apparatus.

Signal recording apparatus

The present invention provides an image signal reproducing apparatus, in which code errors are concealed by using only pixel data corresponding to parts of the pixels of respective two or more adjacent blocks both of which are adjacent to a subject block to be concealed in the same frame, to conceal the code errors without disturbing the image even if the image is rapidly moving and all of pixels included in the block are not available.

Image signal reproducing apparatus having means for concealing image

In transferring image data between a first memory for storing image data in a first sequence and inputting and outputting the image data from and to a first data bus and a second memory for storing image data in a second sequence different from the first sequence and inputting and outputting the image data from and to a second data bus, the permission and the inhibition of the writing of the transferred image data to a transfer destination are controlled and the error detection/correction encoding/decoding is effected during the transfer to facilitate the address management and permit high speed processing of the image data.

Image processing apparatus with two types of data format

In a device or a recording apparatus for converting n-bit data into m-bit data with different conversion methods, and selecting and outputting one of a plurality of converted m-bit data, when controlling output means in accordance with the plurality of m-bit data, a specific signal component is extracted from each of the plurality of m-bit data, the absolute values of the plurality of extracted outputs are obtained, and at least one of the plurality of absolute values or the extracted output corresponding thereto is selectively output (recorded). Thus, superposition and suppression of a specific frequency component can be realized by a single circuit having a very simple circuit configuration. As a result, the size and the cost of a digital signal recording apparatus utilizing a modulation circuit of this kind can be reduced.

Modulating device for recording pilot signals

A movement detection device includes a first detection unit which detects a high-frequency component of an image signal in units of blocks each consisting of a plurality of pixel data. A second detection unit detects a low-frequency component of the image signal in units of blocks, and a discrimination unit discriminates a movement of the image signal in accordance with outputs from the first and second detection units. Also included is an encoding apparatus having an input unit which inputs image data, and a block forming unit which divides the input image data input into blocks. An orthogonal transform unit orthogonally transforms the image data blocks, and a quantization unit quantizes the orthogonally transformed image data. A detection unit detects the degree of fineness of each image data block, and a control unit performs switching control of a processing method of the orthogonal transform unit in accordance with an output from the detection unit.

Movement detection device and encoding apparatus using the same

In an image pickup device for generating a corrected luminance signal by subtracting two color difference signals as correction signals from a luminance signal, a correction signal is generated by base-clipping at least one of the two color difference signals.

Image pickup device

An image sensing recording apparatus has a digital modulator for modulating a digital video signal (color-difference signal), a digital recording unit for digitally recording the digital video signal, and a clock supply unit for supplying a first clock signal on the basis of which modulation is performed by the digital modulator and a second clock signal on the basis of which recording is performed by the digital recording unit. The first and second clock signals have the same frequency.

Growing community of inventors

Kawasaki, Japan

Makoto Shimokoriyama