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Rate distortion optimization (RDO) algorithm plays the vital role in the up to date hybrid video codec H.264/AVC. The RDO algorithm of H.264/AVC reference software is built up by assuming that the transformed residues are memoryless variables. However, our experiments reveal that, for some sequences, the strong temporal correlations exist in the prediction residues. This paper extends the Lagrangian...
Context-based Adaptive Binary Arithmetic Coder (CABAC) is the advanced entropy coding tool employed by main and higher profiles of H.264/AVC. As compared with Context-based Adaptive Variable Length Coding (CAVLC), under the same bit rate, CABAC achieves up to 0.5dB PSNR gain. On the other hand, the high complexity of CABAC severely hinders the whole encoder throughput. To overcome the throughput bottleneck...
Fidelity range extensions of H.264/AVC adopt variable block size (VBS) transform techniques to employ 8 × 8/4 × 4 Hadamard transforms adaptively during the fractional motion estimation. In this literature, the hardwired VBS Hadamard transform accelerator is developed with the following contributions: 1) developed a hardware reusing scheme between 8 × 8 and 4 × 4 transforms within the architecture...
Variable block size (VBS) transform technique is adopted in Fidelity Range Extensions (FRExt) of H.264/AVC, in which 8 ?? 8/4 ?? 4 Hadamard transforms are adaptively employed during the fractional motion estimation. The hardwired VBS Hadamard transform unit is developed by authors and the following contributions are described in this literature: (1) Hardware reusing scheme is adopted in the architecture...
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