Study On H.264 Fast Implementation Algorithm

H.264/AVC is the newest video coding standard of the ITU-T Video Coding Experts Group (VCEG) and the ISO/IEC Moving Picture Experts Group (MPEG). The main goals of the H.264/AVC standardization effort have been enhanced compression performance and provision of a "network-friendly" video representation addressing "conversational" (video telephony) and "nonconversational" (storage, broadcast, or streaming) applications. H.264/AVC has achieved a significant improvement in rate-distortion efficiency relative to existing standards. But the high complexity comes with the high compression, which makes H.264 hardly applied in the real time services.(like Video on Demand, Streaming Media)This article provides an overview of the technical features of H.264/AVC, describes the theory of intra prediction, transform and quantization in detail, and proposes a novel fast algorithm of intra prediction and an algorithm about decision of all-zero blocks before integer transform and quantization. Moreover, we also provide a method using SIMD(single instruction multiple data) to increase the speed of intra prediction coding.Experimental results show that the speed of coding is obviously improved when using proposed techniques.