Image analysis – Image compression or coding – Quantization
Reexamination Certificate
2007-10-23
2007-10-23
Chen, Wenpeng (Department: 2624)
Image analysis
Image compression or coding
Quantization
C382S248000
Reexamination Certificate
active
10251658
ABSTRACT:
Method of compressing a digital image signal in which a first quantization step set, which is unique for a given segment, is determined so that the number of bits needed to encode the quantized data corresponding to this segment is greater than a target value. This first quantization step set then being modified, as a priority, for the blocks of the segment for which the gain, in the course of this modification, on the reduction of the number of bits needed to encode the quantized data corresponding to the segment to which it belongs, is the highest. This modification is carried out, on as many blocks as is necessary for the number of bits of this segment to be less than or equal to the target value. Device to implement this method.
REFERENCES:
patent: 5144424 (1992-09-01), Savatier
patent: 5374958 (1994-12-01), Yanagihara
patent: 5410352 (1995-04-01), Watanabe
patent: 5677734 (1997-10-01), Oikawa et al.
patent: 5838826 (1998-11-01), Enari et al.
patent: 5937098 (1999-08-01), Abe
patent: 6037985 (2000-03-01), Wong
patent: RE37091 (2001-03-01), Tanaka et al.
patent: 6590936 (2003-07-01), Kadono
patent: 6597815 (2003-07-01), Satoh et al.
patent: 6865225 (2005-03-01), Kitamura et al.
patent: 6879632 (2005-04-01), Yokoyama
patent: 6895052 (2005-05-01), Hanamura et al.
patent: 2001/0021220 (2001-09-01), Fert et al.
Rhee, S. et al., “A New Quantizer Selection Scheme for Digital VCR,”IEEE Trans. on Consumer Electronics, 43(3):879-884, Aug. 1, 1997.
Wang, J. et al., “Dynamic Rate Scaling of Coded Digital Video for IVOD Applications,”IEEE Trans. on Consumer Electronics, 44(3):743-749, Jun. 2, 1998.
Bard Jean-Michel
Cunat Christophe
Danger Jean-Luc
Hui Lucas
Chen Wenpeng
Ge Yuzhen
Group des Ecoles des Telecommunications
Iannucci Robert
Seed IP Law Group PLLC
LandOfFree
Method and device for compressing an image signal based upon... 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 device for compressing an image signal based upon..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for compressing an image signal based upon... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3882271