Video error concealment using decoder motion vector estimation

Audio-visual and other multimedia services are seen as important sources of traffic for future wireless networks. An important characteristic of such networks is that they introduce a significant number of errors into the transmitted digital bitstream. For services' such as video, these errors can have the effect of degrading the quality of the received service to the point where it is unusable. We introduce a technique that allows the concealment of the impact of these errors. Our work is based on MPEG 2 encoded video (although our scheme would work equally well with other standards) to be transmitted over a wireless network whose data structures are similar to those of asynchronous transfer mode (ATM). Our simulations include the impact of the MPEG 2 Systems Layer and cover cell loss rates up to 5%.