Image coding control method and device

Details Image coding control method and device Image coding control method and device

2005-12-19

2010-12-21

Poon, King Y (Department: 2625)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240020, C375S240030, C375S240240

Reexamination Certificate

active

07856053

ABSTRACT:
Image coding having high coding efficiency is provided with a small computational complexity by properly determining a prediction mode and a quantization parameter. When an image is coded by a prediction mode selected from plural prediction modes every any coding unit, an undetermined multiplier λ is first calculated from a quantization parameter (function S301). Subsequently, the cost of each of R-D points (pairs of number of coded bits and coding distortion that correspond to plural combinations of prediction modes and quantization parameters) is calculated (function S305) on the basis of the undetermined multiplier λ while generation and estimation of the R-D points and deletion of the points (functions S302-S304) are repeated every coding unit, for example, every macroblock, and the optimal combination of the prediction mode and the quantization parameter is determined on the basis of the R-D point providing the minimum cost.

REFERENCES:
patent: 5694173 (1997-12-01), Kimura et al.
patent: 5778192 (1998-07-01), Schuster et al.
patent: 5978544 (1999-11-01), Shimada et al.
patent: 6711295 (2004-03-01), Nakayama et al.
patent: 6876703 (2005-04-01), Ismaeil et al.
patent: 6947886 (2005-09-01), Rose et al.
patent: 7023922 (2006-04-01), Xu et al.
patent: 7502517 (2009-03-01), Kodama et al.
patent: 7792193 (2010-09-01), Tanizawa et al.
patent: 2004/0105497 (2004-06-01), Takakura et al.
patent: 2005/0100229 (2005-05-01), Becker et al.
patent: 2006/0098733 (2006-05-01), Matsumura et al.
patent: 2004-128749 (2004-04-01), None
Joint Video Team of ISO/IEC MPEG & ITU-T VCEG, 12thMeeting: Redmond, WA, “JVT-L047d8,” Jul. 2004, pp. i-123.
ISO/IEC 13818-2, Information technology—Generic coding of moving pictures and associated audio information: Video, chap. 7, sec. 4, “Inverse quantisation,” Second edition Dec. 15, 2000.
Wedi et al., “Quantization with an Adaptive Dead Zone Size for H.264/AVC FRExt”, JVT of ISO/IEC MPEG & ITU-T VCEG, Document JVT-K026, Mar. 2004.
Wiegand et al.,Rate-Constrained Coder Control and Comparison of Video Coding Standards, IEEE 2003.
Sullivan, “Adaptive quantization encoding technique using an equal expected-value rule”, JVT of ISO/IEC MPEG & ITU-T VCEG, Document JVT-N011, Jan. 2005.
ITU—Telecommunications Standardization Sector, Study Group 16,Video Codec Test Model; Near-Term, Version 9(TMN9), Document Q15-C-15, title page, contents (2 pages), pp. 1-18.
Sullivan et al.;Rate-Distortion Optimization for Video Compression, IEEE Signal Processing Magazine, vol. 15, No. 6, pp. 74-90, Nov. 1998.
U.S. Appl. No. 11/268,721 filed Nov. 8, 2005.
Japanese Application No. 2004-177190 filed Jun. 15, 2004.

Affiliated with

Also associated with

Rating

Image coding control method and device 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 coding control method and device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image coding control method and device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4186244