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2009
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Parallel Rate-distortion Optimized Intra Mode Decision On Multi-core Graphics Processors Using Greedy-based Encoding Orders

10 years 12 days ago
Parallel Rate-distortion Optimized Intra Mode Decision On Multi-core Graphics Processors Using Greedy-based Encoding Orders
Rate-distortion (RD) optimized intra-prediction mode selection can lead to significant improvement in coding efficiency in intraframe encoding. However, it would incur considerable increase in encoding complexity. In this paper, we investigate how multi-core Graphics Processing Units (GPUs) can be efficiently utilized to undertake the task of RD optimized intra mode selection in AVS and H.264 video encoding. Achieving efficient GPU-based intra mode decision, however, could be non-trivial. It is because the mode decision of the current block would depend on the reconstructed data of the neighboring blocks. Therefore, the coding modes of neighboring blocks would need to be computed first before that of the current block can be determined. This dependency poses challenge to computation on multi-core GPUs, which rely heavily on parallel data processing to achieve superior speedups. To address this issue, we analyze the data dependency in intra mode decision, and propose novel greedy-based...
Added 10 Nov 2009
Updated 21 Dec 2009
Type Conference
Year 2009
Where ICIP
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