Movement detection device and encoding apparatus using the same

Details Movement detection device and encoding apparatus using the same Movement detection device and encoding apparatus using the same

1994-03-24

1997-04-01

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

348700, 386 33, H04N 730

Patent

active

056171439

ABSTRACT:
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.

REFERENCES:
patent: 5091782 (1992-02-01), Krause
patent: 5422676 (1995-06-01), Herpel
patent: 5434622 (1995-07-01), Lim

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