In this paper, we propose efficient schemes for enhancing the error robustness of multi-hypothesis motion-compensate predictive (MHMCP) coder without sacrificing the coding efficiency significantly. The proposed schemes utilize the concept of reference picture interleaving and data partitioning to make the MHMCP-coded video more resilient to channel errors, especially for burst channel error. Besides, we also propose a scheme of integrating adaptive intra-refresh into the proposed MHMCP coder to further improve the error recovery speed. Extensive simulation results show that the proposed methods can effectively and quickly mitigate the error propagation and the penalty on coding efficiency for clean channels due to the inserted error resilience features is rather minor.

In this paper, we propose efficient schemes for enhancing the error robustness of multi-hypothesis motion-compensate predictive (MHMCP) coder without sacrificing the coding efficiency significantly. The proposed schemes utilize the concept of reference picture interleaving and data partitioning to make the MHMCP-coded video more resilient to channel errors, especially for burst channel error. Besides, we also propose a scheme of integrating adaptive intra-refresh into the proposed MHMCP coder to further improve the error recovery speed. Extensive simulation results show that the proposed methods can effectively and quickly mitigate the error propagation and the penalty on coding efficiency for clean channels due to the inserted error resilience features is rather minor.

Video transport over Wireless LANs (WLANs) may suffer from signal fading, noise interference, and network congestion which will cause packet loss or packet error. Should a packet loss occur in some frame, it will not only affect the corresponding frame but may also lead to error propagation to the following frames until reaching the next intra-coded frame. In addition, the bandwidth of WLAN is usually far less than that of wired networks, thus protection mechanisms for error control has an innate limitation. In this paper, we first propose a scheme to estimate the error propagation effect of a concealed lost packet. Consider the error-prone characteristic of WLANs and the scenario under limited resource; we propose a prioritized retransmission mechanism to protect against the bursty packet losses in WLAN environments. Experimental results show that the proposed method can usually significantly improve the quality of video streaming over WLANs as compared to play-out deadline-based methods.