Image analysis – Image compression or coding – Adaptive coding
Patent
1995-07-31
1997-12-23
Boudreau, Leo
Image analysis
Image compression or coding
Adaptive coding
382243, 382234, G06K 946, G06K 936
Patent
active
057013683
ABSTRACT:
An apparatus for encoding a digital video signal of an image based on a still object-oriented coding technique wherein the image signal is divided into a number of blocks of an identical size and pixels lying outside of the object being masked with a zero value comprises a subblock formatter for subdividing each of the blocks into 4.sup.N subblocks; 4.sup.N encoders, each of said encoders for encoding each one of the 4.sup.N subblocks to produce a block of encoded data, respectively; 4.sup.N edge detectors, each of the edge detectors for detecting a sub-object edge in said each subblock to produce an edge detection signal and for determining a pattern of the detected edge to produce an edge pattern identification signal; an interleaving block for interleaving each of the scanned data from each of said encoder to produce a stream of scanned data; and a variable length coder for coding a stream of interleaved scanned data to produce a variable length coded signal.
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patent: 5101280 (1992-03-01), Moronaga et al.
patent: 5400075 (1995-03-01), Savatier
patent: 5506916 (1996-04-01), Nishihara et al.
patent: 5510841 (1996-04-01), Iwamura
Boudreau Leo
Chen Wenpeng
Daewoo Electronics Co. Ltd.
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