Research Of Error Resilience In Wireless Environment Based On H.264 Video Stream

H.264/AVC being the latest video coding standard, is proposed by the ITU-T Video Coding Experts Group and the ISO/IEC Moving Picture Experts Group.H.264/AVC represents a number of advances in video coding technology, in terms of both coding efficiency and flexibility for effective use over a broad variety of networks and application domains. This new features provide approximate 50% bit rate saving with equivalent perceptual quality relative to the performance of prior standards. With the development of H.264 , applications and services are being used in the acceleration.Error resilience and post-processing of the signal are important in video communication. In H.264 there are some latest error resilience methods,such as Parameter Set , Flexible Macro-Block Order and Redundancy Slice. Data partitioning, as one of error resilience methods,has been improved in H.264 and has been widely used. In this paper ,several error resilience schemes over data partitioning are presented and these schemes are analyzed and compared. Furthermore,a new method based on data partitioning is presented. This method is compatible with H.264/AVC without any increasing channel burden and arithmetic complexity and can be used in practice.The common method of post-processing is error concealment. It exploits the correlation of picture in temporal and spatial domains to eliminate the influence of error. It is not needed to add any redundancies in compressed bit-stream. This paper proposes a self-adaptive error concealment metod which can figure out what kind of data slice the decode receives and choose to utilize different type of error concealments in H.264.Simulation result shows that video quality is obviously improved using proposed error resilience technology in bit-error environment.