Efficient MB and prediction mode decisions for intra prediction of H.264 high profile
PCS'09 Proceedings of the 27th conference on Picture Coding Symposium
Modeling 3D facial expressions using geometry videos
Proceedings of the international conference on Multimedia
MMM'11 Proceedings of the 17th international conference on Advances in multimedia modeling - Volume Part I
Power-efficient video encoding on resource-limited systems: A game-theoretic approach
Future Generation Computer Systems
A fast two-step block type decision algorithm for intra prediction in H.264/AVC high profile
Multimedia Tools and Applications
Mode decision acceleration for scalable video coding through coded block pattern
Journal of Visual Communication and Image Representation
Fast intra prediction for high efficiency video coding
PCM'12 Proceedings of the 13th Pacific-Rim conference on Advances in Multimedia Information Processing
| Hi-index | 0.00 |
In H.264/AVC intra-frame coding, the rate-distortion optimization (RDO) is employed to select the optimal coding mode to achieve the minimum rate-distortion cost. Due to a large number of combinations of coding modes, the computational burden becomes extremely high in intra-prediction. In this paper, we propose two fast, efficient but reliable direction detection algorithms by computing subblock and pixel direction differences. Both proposed methods effectively estimate the edge direction inside the block to narrow down the predictive modes to reduce the RDO computation. Experimental results show that the proposed methods can reduce the encoding time by about 60% with negligible loss of coding performance. For hardware realization, a fast mode decision VLSI circuit for intra-prediction with the silicon core size of 0.12 times 0.12 mm2 at 0.18-mum CMOS technology is implemented. The fast mode decision VLSI in three-stage pipelined architecture operated at 173 MHz can encode 30 fps real-time videos up to Level 5.