Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2003-03-20
2008-10-14
Rao, Andy S (Department: 2621)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240020
Reexamination Certificate
active
07436890
ABSTRACT:
The present invention provides a quantization control system for video coding, for optimizing bit allocation based on visual priority which expresses at high precision human visual characteristics for videos, thereby improving subjective image quality of the whole image even with a limited number of bits. An object is extracted from a picture of an input image (S1) and a gaze parameter V(j) for the extracted object is calculated (S2). Then, a texture attribute parameter t(k) of each macroblock included in the object is calculated (S3). The gaze parameter V(j) and texture attribute parameter t(k) are used to calculate a visual priority parameter w(k) for each macroblock. Based on this parameter w(k), a quantization parameter is determined.
REFERENCES:
patent: 6167087 (2000-12-01), Kato
patent: 6173069 (2001-01-01), Daly et al.
patent: 7003037 (2006-02-01), Bordes et al.
patent: 7027655 (2006-04-01), Keeney et al.
patent: 2002/0024999 (2002-02-01), Yamaguchi et al.
patent: 10-028267 (1998-01-01), None
patent: 10-164581 (1998-06-01), None
patent: 10-285589 (1998-10-01), None
patent: 2002-051345 (2002-02-01), None
G. Ishihara et al.; “Picture Quality Improvement of HDTV Encoding Scheme for TV Broadcasting based on Advances Quantization Control”,ITE Technical Report; vol. 26, No. 31; Mar. 20, 2002; p. 19.
Gouichi Ishihara, et al., “Low bit-rate HDTV Coding Scheme by Using Adaptive Bit Assignment Based on Visual Weighting Factor,” IEICE General Conference vol. 2002, Mar. 7, 2002, D-11-7, p. 7.
Japanese Office Action dated Feb. 14, 2007, Application No. 2002-173141.
Ishihara Gouichi
Matsumoto Shuuichi
Naitou Sei
Takagi Koichi
Wada Masahiro
KDDI R&D Laboratories Inc.
Rao Andy S
Westerman, Hattori, Daniels & Adrian , LLP.
LandOfFree
Quantization control system for video coding does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Quantization control system for video coding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantization control system for video coding will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4017019