A rate control using adaptive model-based quantization

Authors:
Seonki Kim;Tae-Jung Kim;Sang-Bong Lee;Jae-Won Suh
Affiliations:
LG Electronics, Inc., Seoul, Korea;School of Electrical and Computer Engineering, Chungbuk National University, Chongju, Korea;School of Electrical and Computer Engineering, Chungbuk National University, Chongju, Korea;School of Electrical and Computer Engineering, Chungbuk National University, Chongju, Korea
Venue:
PSIVT'06 Proceedings of the First Pacific Rim conference on Advances in Image and Video Technology
Year:
2006

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Abstract

The rate control is an essential component in video coding to provide a uniform quality under given coding constraints. The source distribution to be quantized cannot be defined as a single model in the video sequence. In this paper, we present a new rate control algorithm based on the Generalized Gaussian R-D model. Through considering a relation between adjacent frames or macroblocks, we determine model parameters, and perform a rate control on the H.264/AVC video codec. As shown in experimental results, the proposed algorithm provides an improved quality of the reconstructed picture after encoding. In addition, our scheme generates the number of bits close to the target bitrate.