Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Two-description distributed video coding for robust transmission | Wang et al. EURASIP Journal on Advances in Signal Processing 2011 2011 76 http content 2011 1 76 o EURASIP Journal on Advances in Signal Processing a SpringerOpen Journal RESEARCH Open Access Two-description distributed video coding for robust transmission Anhong Wang 1 Zhihong Li1 Yao Zhao2 Wubin Wang3 and Huihui Bai2 Abstract In this article a two-description distributed video coding 2D-DVC is proposed to address the robust video transmission of low-power capturers. The odd even frame-splitting partitions a video into two sub-sequences to produce two descriptions. Each description consists of two parts where part 1 is a zero-motion based bitstream of a sub-sequence and part 2 is a Wyner-Ziv WZ -coded bitstream of the other sub-sequence. As the redundant part the WZ-coded bitstream guarantees that the lost sub-sequence is recovered when one description is lost. On the other hand the redundancy degrades the rate-distortion performance as no loss occurs. A residual 2D-DVC is employed to further improve the rate-distortion performance where the difference of two subsequences is WZ encoded to generate part 2 in each description. Furthermore an optimization method is applied to control an appropriate amount of redundancy and therefore facilitate the tuning of central side distortion tradeoff. The experimental results show that the proposed schemes achieve better performance than the referenced one especially for low-motion videos. Moreover our schemes still maintain low-complexity encoding property. Keywords distributed video coding robust video transmission multiple description coding 1. Introduction The increasing demand for friendly up-link communication of low-power video captures has generated a lot of research interests in developing video codec of low-complexity encoding. As a new video coding framework distributed video coding DVC 1-3 also called Wyner-Ziv WZ video coding makes the low-complexity video encoding a reality in .
