A Fast Mode Decision Algorithm of 4x4 block Intra Prediction for H.264/AVC
It is well known that H.264/AVC has great advantage of coding e OTciency compared with the successful prior coding standards and it can save about 50％ bit-rate under the same reconstructed picture quality.But the complexity of H.264/AVC encoder is also very high and it limits the application of H.264/AVC in the domain of real time video communication.Based on some observations in the experiments,we propose a novel fast mode decision algorithm of 4x4 block intra prediction for H.264/,4 VC in this paper.The proposed algorithm utilizes the following facts:(i)the horizontal prediction mode has higher possibility to be the best prediction mode than the other eight modes,(ii)The RD costs between the best prediction mode and its adjacent prediction mode have strong correlation,(iii)some 4x4 blocks coefficients of DCT are all zeroes in some cases. Therefore,it can reduce the computational complexity of the H.264/AVC encoder remarkably.Experimental results show that the reduced time of our proposed algorithm is about 45％ less than that of H.264/AVC,at the expense of 2％ or so bit-rate increasing.
Yun Cheng Min Wu
School of Information Science and Engineering,Central South University,410083 Changsha,China;Departm School of Information Science and Engineering,Central South University,410083 Changsha,China
国际会议
厦门
英文
1231-1236
2008-11-17（万方平台首次上网日期，不代表论文的发表时间）