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In this paper, we describe a bandwidth adaptable, low bit-rate video coding scheme, referred to as scalable, noncausal prediction with vector quantization and conditional replenishment (SNP/VQR). Practical implementations of SNP/VQR are derived by exploiting the convergence and block banded properties of the state matrices. The resulting subblock SNP/VQR reduces the computational complexity and the storage requirements of the direct SNP/VQR by two orders of the linear magnitude of the frame dimensions. The subblock SNP/VQR is also capable of offering different quality of services (QoS) in the spatial and temporal domains. In the experiments, the block SNP/VQR compares favorably with the standard video codecs including the International Standards Organization (ISO) proposed MPEG4 and the International Telecommunication Union (ITU) proposed H.263, especially at low bit rates.
Date of Publication: Feb. 2006