Wavelet-Domain Distributed Video Coding Using Optimized TCQ

Nowadays, distributed video coding (DVC) has been receiving more and more attention due to its contribution to the low complexity encoding. This paper presents a new DVC using an optimized trellis coded quantization (TCQ) to improve the current schemes. In the scheme, the improved quadtree scanning firstly removes the zero trees of the Wyner-Ziv frame, and then the non-zero trees are quantized by an optimized TCQ. Finally, the quantized coefficients are compressed by Slepian-Wolf coder. Experimental results show that the proposed scheme outperforms the referenced in rate-distortion performance, and the goal of low-complexity encoding is achieved.