Unidirectional Distributed Video Coding using dynamic parity allocation and improved reconstruction

Distributed Video Coding (DVC), has been an attractive alternative to the conventional video coding for a number of applications because of its flexibility for designing extremely low complex video encoders. DVC based video codecs proposed in the literature generally include a dynamic feedback channel between the encoder and the decoder. However it is observed that this dynamic feedback mechanism is a practical hindrance in a number of practical consumer electronics applications. In this paper, a novel transform domain Unidirectional Distributed Video Codec (UDVC) without a feedback channel is proposed. A simple encoder rate control algorithm is used in order to eliminate the feedback channel of the existing DVC codecs while keeping the encoder complexity as low as possible. Moreover, an improved reconstruction algorithm is utilised in order to improve the quality of the reconstructed frame. Simulation results show that the performance of the proposed codec can approach to that of DVC with feedback, which is assumed to be known as the upper bound.