New error resilience method for video transmission in DS-CDMA systems

This paper introduces a new error resilience method for reliable video transmission in DS-CDMA systems. The new scheme is designed to stop error propagation in the decoded video sequence originated by residual channel errors. Although our technique is general, we focus here on the problem of providing reliable video communication from wired users to mobile users in slow fading environments. This scenario has been shown to be the most critical due to long block error bursts present in the forward link of CDMA systems, and the inability of error resilience approaches incorporated in wired video codecs to guarantee an acceptable video quality in wireless transmissions. Numerical results show that our approach achieves important improvements in the quality of the decoded video.