H. 264/AVC Error Resilience Strategies for 3G Conversational Video Services
3G对话式视频业务中H．264／AVC的容错策略

The third generation mobile system(3G) makes mobile conversational video transmission in wireless environment possible and H.264/AVC is optionally supported by the latest 3GPP/3GPP2 standards.Error resilience protection for 3G video stream is necessary due to high packet loss rate in wireless environment.Moreover,3G mobile terminals support only part of error resilience tools of H.264/AVC because of the hardware restrictions.This paper presents various error resilience tools and their usability in 3G environment,at the same time,some simple error resilience schemes for packet-switched 3G conversational services are proposed.Performances of these strategies are tested using off-line common test conditions.Experimental show that these strategies can obtain reasonably satisfactory error correction ability.Experiments data also show that,encoder with low complexity FMO method and appropriate intra block refreshing can get better error correction ability,because this method can make full use of spatial correlation between frames and reduce the requirement of bit rate.