Improving Intra mode coding in H.264/AVC through block oriented transforms
Authors:
- 1 October 2006
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 382-386
Abstract
In an H.264 video encoder, the important task of intra coding is performed in the residual domain after a spatial transform has been applied to the block data. Although the intra prediction is very efficient and shows the ability to capture some orientations of the image, after this spatial prediction the intra residual may still show regular structures. To take this possible regularity into account, especially orientation, we propose a preprocessing stage that selects the best rotation to be applied to the block among a set of predefined rotations. To this end, we utilize a rate-distortion algorithm. We further propose to calculate the real orientation of the block to decrease the amount of computation. Experimental results show that compared to the standard intra-prediction mode of H.264, the proposed method can gain up to 1 dBsKeywords
This publication has 2 references indexed in Scilit:
- Rate-constrained coder control and comparison of video coding standardsIEEE Transactions on Circuits and Systems for Video Technology, 2003
- Context-based adaptive binary arithmetic coding in the H.264/AVC video compression standardIEEE Transactions on Circuits and Systems for Video Technology, 2003