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A Hierarchical Variable-sized Block Transform Coding Scheme for Coding Efficiency Improvement on H.264/AVC
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- Authors
- Bum Shik Lee, Jae Il Kim, Sang Soo Ahn, Mun Churl Kim, Hui Yong Kim, Jong Ho Kim, Jin Soo Choi
- Issue Date
- 2010-12
- Citation
- Picture Coding Symposium (PCS) 2010, pp.522-525
- Language
- English
- Type
- Conference Paper
- Abstract
- In this paper, a rate-distortion optimized variable block transform coding scheme is proposed based on a hierarchical structured transform for macroblock (MB) coding with a set of the order-4 and -8 integer cosine transform (ICT) kernels of H.264/AVC as well as a new order-16 ICT kernel. The set of order-4, -8 and -16 ICT kernels are applied for inter-predictive coding in square (4×4, 8×8 or 16×16) or non-square (16×8 or 8×16) transform for each MB in a hierarchical structured manner. The proposed hierarchical variable-sized block transform scheme using the order-16 ICT kernel achieves significant bitrate reduction up to 15%, compared to the High profile of H.264/AVC. Even if the number of candidates for the transform types increases, the encoding time can be reduced to average 4 - 6% over the H.264/AVC. © 2010 IEEE.
- KSP Keywords
- Block transform, Coding efficiency, Predictive Coding, Rate-Distortion, coding scheme, cosine transform, efficiency improvement, encoding time, transform coding