A transcoding framework with error-resilient video/depth rate allocation for mobile 3D video streaming

With the development of wireless multimedia communication, mobile 3D video will be gradually popular as it can make people enjoy the natural 3D experience anywhere and anytime. In the current stage, mobile 3D video is usually distributed over the error-prone and heterogeneous network which consists of wire-line and wireless channels. In such applications, the transcoding plays an important role to provide the adaptive and error-resilient bit-stream to the wireless channel. To guarantee the high quality mobile 3D video streaming, this paper proposes a transcoding framework with error-resilient video/depth rate allocation, which utilizes the multi-pass re-encodings to build a rate allocation table (Rate-QP-PLR (packet loss rate) table). Through looking up the table, the proposed framework can select the optimal transcoding quantization parameters (QPs) of video and depth to obtain the error-resilient 3D video transmission and therefore it can make the encoded stream adapt to the transition from wire-line to wireless network. Experimental results show that the proposed 3D video transcoding framework can provide the superior rate-distortion performance for the mobile 3D video streaming.