Content-Based Adaptive Intra Blocks Update for Robust Wireless Video Communications

Unreliable and error-prone nature of wireless channel is a great challenge for wireless video communications. According to high frequency of error occurrence in wireless channel, limited resources bandwidth and transmission power in mobile terminal, this paper represents a content-based adaptive intra block update method. It takes different intra block update rate on different image features. The vulnerability of each coded block to channel errors is measured through "error-sensitivity metric", and intra coding mode is carried out for appropriate macro block. Experiment results show that the method can effectively improve video transmission robustness on wireless-channel with slightly computational cost.