Image analysis – Image compression or coding – Transform coding
Patent
1996-07-03
1998-08-04
Boudreau, Leo
Image analysis
Image compression or coding
Transform coding
382250, 348403, 348408, G06K 936, G06K 946, H04N 712
Patent
active
057907064
ABSTRACT:
The present invention provides an apparatus and method for, in at least one of: encoding and decoding, scanning transform coefficients in an image/video encoded/decoder. In encoding, the steps include: A) segregating a predetermined number of quantized transform coefficients into a plurality of coefficient zones and storing the coefficient zones in a memory unit; B) examining each coefficient to determine which zone/zones has/have at least one non-zero coefficient; C) scanning each coefficient of the zones having at least one non-zero coefficient in a predetermined scanning order; D) encoding which coefficient zone contains at least one non-zero coefficient to provide first entropy-encoded information bits; E) determining whether at least one coefficient zone is to be encoded; F) encoding the non-zero coefficients to provide second entropy encoded information bits. Decoding is accomplished in mirror fashion.
REFERENCES:
patent: 4751742 (1988-06-01), Meeker
patent: 5155592 (1992-10-01), Verbiest
patent: 5276525 (1994-01-01), Gharavi
patent: 5473376 (1995-12-01), Auyeung
patent: 5561464 (1996-10-01), Park
Boudreau Leo
Mehta Bhavesh
Motorola Inc.
Stockley Darleen J.
LandOfFree
Method and apparatus for scanning of transform coefficients does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for scanning of transform coefficients, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for scanning of transform coefficients will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1187151