VITERBI-LIKE JOINT OPTIMIZATION OF STEREO EXTRACTION FOR ON-LINE RATE ADAPTATION IN SCALABLE MULTIVIEW VIDEO CODING

The concept of Quality Layers (QL) has been adopted in the SVC standard in order to ensure optimal rate adaptation of pre-coded video in the rate-distortion sense [1]. We have previously extended QL to multiview scalable video for efficient transport of 3DTV over the Internet [2]. However, it is not possible to use the QL method in applications that require real-time encoding since priority determination process assumes the availability of the whole stereo video sequence. In this work, a Viterbi-like on-line, joint optimization of right and left view rate-adaptation is proposed for real-time scalable stereo video coding (with one GoP delay). We assume that the encoder/extractor is aware of the available dynamic network bandwidth in order to perform rate-distortion optimized MGS layer selection for each GoP. Experimental results show that the performance of proposed on-line method is comparable to that of QL that would require the whole stereo sequence.