Enhanced Reconstruction of the Quantised Transform Coefficients for WYNER-ZIV Coding

In recent years, the Distributed Video Coding (DVC) has become a more and more popular research area. In the current work, the framework of transform domain Wyner-Ziv coding of video frames is considered, following the scheme developed in the EU Project DISCOVER. While some frames are conventionally coded as key frames, other frames are Wyner-Ziv encoded using turbo codes. After the generation of side information and turbo decoding process at the decoder, the quantisation indices of the quantised transform coefficients of Wyner-Ziv frames are available. In this paper, we devote our attention to the reconstruction of quantised transform coefficients resulting in a minimised quantisation error energy, where coding gains of up to 0.9 dB are obtained.