DC-guided compression scheme for distributed video coding

This paper presents a new distributed video coding (DVC) scheme where the DC and the AC coefficients of DCT transform are separately encoded and transmitted. The DC coefficients are first transmitted to the decoder and compared with their corresponding DC coefficients found in the side information derived within the decoder. The result of the comparison is then transmitted back to the encoder and used to decide whether the AC coefficients of a block need to be transmitted. Experimental results show that the proposed scheme can significantly improve the performance, while maintaining a low computational complexity at the encoder.