Image analysis – Image compression or coding – Quantization
Reexamination Certificate
2008-06-04
2010-06-15
Ahmed, Samir A (Department: 2624)
Image analysis
Image compression or coding
Quantization
C382S232000, C382S233000, C382S236000, C382S250000, C375S240120, C375S240240, C348S407100
Reexamination Certificate
active
07738720
ABSTRACT:
An image distribution apparatus divides image data of a single frame into a plurality of blocks, orthogonally transforms the blocks and calculates transformation coefficients, quantizes the calculated transformation coefficients, codes the quantized transformation coefficients, and distributes the coded image data. The image distribution apparatus acquires the quantized transformation coefficients, stores the acquired transformation coefficients in a storage unit, calculates differences between the transformation coefficients of a first frame and the transformation coefficients of a second frame stored in the storage unit in a unit of block, counts blocks whose difference values calculated above are equal to or greater than a predetermined value as changing blocks of the first frame, and determines that the first frame has changed when the counted number of blocks is equal to or greater than a predetermined value.
REFERENCES:
patent: 5204706 (1993-04-01), Saito
patent: 5253057 (1993-10-01), Terui et al.
patent: 5898457 (1999-04-01), Nagao et al.
patent: 5978029 (1999-11-01), Boice et al.
patent: 6275528 (2001-08-01), Isozaki et al.
patent: 6304606 (2001-10-01), Murashita et al.
patent: 6810086 (2004-10-01), Puri et al.
patent: 7031385 (2006-04-01), Inoue et al.
patent: 7130472 (2006-10-01), Iizuka et al.
patent: 2001/0019631 (2001-09-01), Ohsawa et al.
patent: 2001/0043744 (2001-11-01), Hieda
patent: 2002/0036717 (2002-03-01), Abiko et al.
patent: 2002/0131494 (2002-09-01), Fukuda et al.
patent: 2002/0138847 (2002-09-01), Abrams et al.
patent: 2004/0024876 (2004-02-01), Ito et al.
patent: 2005/0100092 (2005-05-01), Sekiguchi et al.
Iizuka Yoshio
Kawai Tomoaki
Ahmed Samir A
Bayat Ali
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
LandOfFree
Image distribution apparatus, communication terminal... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image distribution apparatus, communication terminal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image distribution apparatus, communication terminal... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4161439