Adaptive coset partition for distributed video coding

Distributed video coding (DVC) can enable video coding systems to shift motion search complexity from the encoder to the decoder, for which one of the practical constructive frameworks is using coset partition. Two typical coset partition methods, namely, modular based coset partition and scalar quantizer based coset partition, are considered and examined. Taking advantage of their respective strengths while circumventing their weaknesses, an adaptive coset partition scheme is proposed by integrating the two coset partition methods to minimize the decoding errors, where a mode design for bit allocation between the two schemes is developed based on prediction of the correlation noise. Experimental results validate effectiveness of the proposed scheme with better coding performance as compared with the relevant coset partition algorithms.