Proceedings of the Korean Society of Broadcast Engineers Conference (한국방송∙미디어공학회:학술대회논문집)
- 2009.01a
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- Pages.207-210
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- 2009
RATE-DISTORTION OPTIMAL BIT ALLOCATION FOR HIGH DYNAMIC RANGE VIDEO COMPRESSION
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Lee, Chul
(School of Electrical Engineering, Korea University) ;
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Kim, Chang-Su
(School of Electrical Engineering, Korea University)
- Published : 2009.01.12
Abstract
An efficient algorithm to compress high dynamic range (HDR) videos is proposed in this work. We separate an HDR video sequence into a tone-mapped low dynamic range (LDR) sequence and a ratio sequence. Then, we encode those two sequences using the standard H.264/AVC codec. During the encoding, we allocate a limited amount of bit budget to the LDR sequence and the ratio sequence adaptively to maximize the qualities of both the LDR and HDR sequences. While a conventional LDR decoder uses only the LDR stream, an HDR decoder can reconstruct the HDR video using the LDR stream and the ratio stream. Simulation results demonstrate that the proposed algorithm provides higher performance than the conventional methods.