Dynamic Video Stream Switching By Using SP/SI Frames of H.264/AVC

• Main Authors: Ying-chang Wu, 吳盈樟
• Other Authors: Po-chyi Su
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/50389984820164568386

碩士 === 國立中央大學 === 資訊工程研究所 === 99 === The SP-frame in H.264 facilitates the drift-free bit-stream switching. However, the switching points have to be periodically inserted into the bit-stream in advance and thus the low-delay bit-stream switching may not be achieved. If many switching points are assigned, the coding performance of SP/SI frames will be affected. In this research, we consider the dynamic bit-stream switching in H.264/AVC, which can be applied on both the multi-rate coding and multi-view coding for video adaption and free-viewpoint switching. A novel coding scheme is proposed to enable the drift-free switching at any frame. We separate a frame into two components, i.e. the motion compensated part and residuals, which are encoded independently by employing the concept of SP/SI frames. For interview coding, the inter-correlation from the different views is further utilized. We apply SIFT to estimate the global displacement and the histogram matching algorithm to correct the color inconsistence in different scenes so that the negative effects of secondary SP frames can be reduced. Experimental results show that our scheme has good performance in the free bit-stream switching.