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2007
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Rate Control for Hierarchical B-picture Coding with Scaling-factors

9 years 4 months ago
Rate Control for Hierarchical B-picture Coding with Scaling-factors
—The coding performance can be further improved when the hierarchical B-picture coding is introduced into H.264/AVC. However, the existing rate control schemes can NOT work efficiently in such new coding framework. This paper proposes a novel rate control algorithm when hierarchical Bpicture coding is used in H.264/AVC. Firstly, a set of scalingfactors applied in designing cascaded quantizer for the B frames at different temporal levels is introduced. Based on the designed scaling-factors, an efficient bit-allocation strategy for hierarchical B-picture coding is presented. The experiments show that the proposed rate control algorithm can further improve PSNR up to 0.7dB compared to the existing hierarchical B-picture coding in H.264/AVC, while the mismatch of target bit rate and real bit rate does not exceed 2%.
Long Xu, Wen Gao, Xiangyang Ji, Debin Zhao
Added 04 Jun 2010
Updated 04 Jun 2010
Type Conference
Year 2007
Where ISCAS
Authors Long Xu, Wen Gao, Xiangyang Ji, Debin Zhao
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