Multiple description coding using a new Bitplane-LVQ scheme

In this paper, a novel Bitplane-LVQ technique to compress subbands bitplane coefficients is proposed for multiple description coding (MDC) system. The MDC system utilizes three descriptions with one central decoder and three side decoders. The significant bitplanes subband coefficients are encoded using lattice D₂ which the number of bitplanes (k) ties with the amount of compression ratio. The residual bitplanes of the subband coefficients are compressed using Multistage A₂ Lattice Vector Quantization (MA₂LVQ) technique. This paper also presents the design of two new different lattice labeling algorithms; one is for the significant subset bitplanes and the other for the residual bitplane. Experimental results show that the proposed MDC with Bitplane-LVQ scheme can reach very low encoding bit-rate with good performance in PSNR for central decoder.