In the H.264 advanced video coding (AVC), intra prediction plays an important role in compression of intraframes. The H.264 provides two kinds of cost function, sum of absolute difference (SAD) or sum of absolute transform difference (SATD) plus 4P? (Qp) by using Hadamard transform, to decide the best intra mode. In this paper, we first propose an improved cost function, which uses the sum of absolute integer transform difference (SAITD) and then develop two fast transform algorithms each for Hadamard transform using in SATD and integer transform using in SAITD. These two fast transform algorithms are based on the property of linear transform and spatial relation in predicted block. With the fast Hadamard transform algorithm, we can reduce the computation nearly by half compared to the original algorithm. With small increase of computation, the SAITD achieves better coding performance in low bit rate than the SATD.
|Number of pages||4|
|Journal||Proceedings - IEEE International Symposium on Circuits and Systems|
|Publication status||Published - 2005 Dec 1|
|Event||IEEE International Symposium on Circuits and Systems 2005, ISCAS 2005 - Kobe, Japan|
Duration: 2005 May 23 → 2005 May 26
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering