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%