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

1998-01-16

2000-05-16

Tung, Bryan

Television

Bandwidth reduction system

Data rate reduction

348420, 348699, 348700, 382236, H04N 736

Patent

active

060644362

ABSTRACT:
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; a encoding control portion connected to a buffer memory, a specified area extracting portion and the motion extracting portion to control quantizing and encoding process.

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Alexandros Eleftheriadis et al.; Model-Assisted Coding of Video Teleconferencing Sequences at Low Bit Rates; Published May 30, 1994; pp. 177-180.
R.H.J.M. Plompen et al.; An Image Knowledge Based VIdeo Codec for Low Bitrates; Apr. 3, 1987, pp. 1-12.

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