Analysis and architecture design of multi-transform architecture for H.264/AVC intra frame coder

Intra mode decision is the significant technique to improve the coding performance of H.264/AVC intra frame coder. Many intra frame coding architectures are proposed to achieve the high performance requirement by using the sum of absolute integer transformed differences (SAITD) mode decision instead of the sum of absolute transformed differences (SATD) mode decision. In this paper, we analyze the RD performance among the SAITD model and the SATD model, and validate that the SATD-based mode decision is better than SAITD model. In the light of the claim, an efficient multi-transform architecture with unique kernel is proposed to attempt deriving the coefficients of integer transforme and Hadamard transform simultaneously. Moreover, proposed architecture can be configured to perform all 4times4 transforms and 2times2 transform for luma and chroma coding. By utilizing our multi-transform architecture, H.264/AVC intra frame coder via the interleaved 14MB/16MB prediction schedule can be realized based on the SATD model.