Image sequence encoding device and area extracting device

Details Image sequence encoding device and area extracting device Image sequence encoding device and area extracting device

1995-11-27

1998-03-17

Au, Amelia

Television

Bandwidth reduction system

Data rate reduction

348420, H04N 736

Patent

active

057292957

ABSTRACT:
In an image sequence encoding device, a specified area and a motion area are extracted from an input image and encoded by allocating a relatively increased amount of codes to the specified area and a relatively reduced amount of codes to the motion area to improve the quality of the specified area of the image. The image sequence encoding device is provided with a specified area extracting portion connected to a frame memory to extract a specified area from an input image; a motion area extracting portion connected to a motion detecting portion to extract a motion area according to a magnitude of motion vectors and a specified area of a preceding frame; an encoding control portion connected to a buffer memory; a specified area extracting portion and a motion extracting portion to control quantizing and encoding process.

REFERENCES:
patent: 5253075 (1993-10-01), Sugiyama
patent: 5475502 (1995-12-01), Lee et al.
patent: 5526052 (1996-06-01), Ar
patent: 5532746 (1996-07-01), Chang
patent: 5572258 (1996-11-01), Yokoyama
R. H. J. M. Plompen et al, An Image Knowledge Based Video Codec for Low Bitrates, Apr. 03, 1987, pp. 1-12.

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