Distributed video coding allows the compression of video frames in a distributed fashion leading to a rather simple computational encoding, but requiring a complex decoding. The main drawback however is the decoding complexity making some practical applications difficult. Nowadays, most distributed video coding schemes are based on efficient channel codes such as LDPC and Turbo codes. This is the main cause of the decoder's high complexity. This paper proposes a new distributed video coding scheme that can avoid the use of such codes. It is based on an adaptive representation of the source frames combined with a DC-guided scheme. This combination can reduce the data that need to be transmitted from the encoder to the decoder. This subsequently allows complex channel coding to be replaced by simple entropic coding methods, such as arithmetic source coding, with little performance degradation. Experimental results show that the proposed scheme can significantly improve the performance compared to conventional distributed video coding schemes, while enabling a much lower computational complex decoder.

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Distributed video coding is a new video paradigm that transfers the computational bulk from video encoders to decoders. Thus, the scenario of video transmission involving inexpensive encoders and a powerful central decoder would be possible. In a previous work, the authors have proposed a novel distributed video coding scheme with progressive decoding. The proposed architecture considers a chessboard structure for block grouping. A subset of blocks are first sent, decoded and then used to update the side information. Then, the remaining blocks are sent and decoded using the updated and more accurate side information. This progressive technique with two groups of blocks shows an improvement up to 1.7 dB over the conventional DVC architecture. In this paper, we extend the progressive architecture by splitting the frame into three and four groups of blocks rather than only two groups. Further improvement up to 0.4 dB over the progressive architecture with only two groups is obtained.