A Distributed-source-coding Based Robust Spatio-temporal Scalable Video Codec
چکیده
A video coding paradigm called PRISM (Power-efficient, Robust, hIgh compression, Syndrome-based Multimedia coding) built on distributed source coding principles has been recently proposed in [1]. In this paper, we study a scalable version of PRISM which addresses both spatial and temporal scalability. The proposed codec inherits the main attributes of the PRISM architecture, namely increased robustness to channel losses and more flexible sharing of computational complexity between encoder and decoder, while adding scalability as an additional feature. In this paper, we show the efficacy of enhancing a standards-compliant base layer codec (H.264/AVC) with a PRISM refinement bit stream, resulting in an overall robust spatio-temporal scalable video codec that is backward-compatible with the existing standards-based baseline codec.