A Novel Error Resilient Temporal Adjacency Based Adaptive Multiple State Video Coding over Error Prone Channels

摘要

Video streaming applications have been gaining interest rapidly in various perspectives from entertainment to e-learning. Practically, these applications suffer from inevitable loss in the transmission channels. Hence it is a challenging task to improve the quality of video streaming over the error prone channels. Multiple Description Coding (MDC) is a promising error resilient coding scheme which sends two or more descriptions of the source to the receiver to improve the quality of video streaming over error prone channels. Depending on the number of descriptions received, the reconstruction-distortion gets reduced at the receiver. Multiple State Video Coding (MSVC) is a MDC scheme based on frame-wise splitting of the video sequence into two or more sub-sequences. Each of these sub-sequences is encoded separately to generate descriptions, which can be decoded independently on reception. Basic MSVC is based on the separation of frames in a video into odd and even frames and sending each part over a different path. The drawbacks or certain subtleties of the basic MSVC such as lack of meaningful basis behind the frame wise splitting, inability to support adaptive streaming effectively, less error resiliency are brought out and discussed. Thus to overcome them and to improve the quality of video streaming, the design of a novel MSVC scheme based on the temporal adjacency between video frames is proposed in this paper. This temporal adjacency based splitting of the video stream into N sub-sequences also enables the proposed scheme to adapt to varying bandwidths in heterogeneous environments effectively. The simulation results show that the proposed scheme also outperforms Single State Video Coding (SSVC) scheme in terms of the sensitivity of perception of the reconstructed video sequence, under various loss scenarios.