Bi-directional entire frame recovery in MDC video streaming

In video streaming over error prone networks, the loss of a packet usually results in the loss of a whole frame which leads to severe degradation of the subsequent frames. In this paper, this problem is combated by combining MDC (multiple description coding) with a novel error concealment algorithm for entire frame losses. The proposed block based bi-directional frame recovery algorithm exploits information in motion vectors and reconstructed images of the previous and next frames to extrapolate the blocks of the lost frame. The simulation results show that our block-based bi-directional weighted motion-vector-extrapolation (BW-MVE) algorithm obviously outperforms the existing methods by 2.52∼4.88 dB. Moreover, the proposed scheme of MDC with BW-MVE introduces a promising approach for error resilient video streaming over the Internet.