Modified steepest-descent for bit allocation in strongly dependent video coding

Ferguson, K. L. and Allinson, Nigel (2009) Modified steepest-descent for bit allocation in strongly dependent video coding. IEEE Transactions on Circuits and Systems for Video Technology, 19 (7). pp. 1057-1062. ISSN 1051-8215

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The problem of efficient bit allocation for dependent video coding within the context of ascribing a quantizer to each macroblock (MB) within a frame is addressed in this letter. Strongly dependent MBs exhibit significant discontinuities on their operational distortion-rate (D-R) convex hulls that nullify the assumptions made for the use of the coordinate-wise steepest-descent (SD) algorithm. A qualified slope concept and a near-neighborhood look-ahead modification are introduced to circumvent these problems and are experimentally evaluated on a set of H.263+ encodings. © 2009 IEEE.

Keywords:A-frames, Bit allocation, Convex hull, Efficient bit allocation, Encodings, Look-ahead, Macro block, Quantizers, Rate distortion optimization, Video coding, Electric distortion, Signal distortion, Visual communication, Image coding
Subjects:G Mathematical and Computer Sciences > G400 Computer Science
G Mathematical and Computer Sciences > G740 Computer Vision
Divisions:College of Science > School of Computer Science
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ID Code:8546
Deposited On:10 Apr 2013 15:02

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