An Unequal Playback Length Segmentation Method in P2P Streaming Media System Based on Scalable Video Coding

摘要

P2P Streaming Media System Based on SVC (Scalable Video Coding) often use equal playback length segmentation method to segment the video data, but the size of the data in different segmentation varies widely using this segmentation method, which can lead to the instability of data transmission in P2P network system. In this case, this paper presents a new unequal playback segmentation method in P2P Streaming Media System Based on SVC. In the new method, the video data is segmented twice first segment the video data of each layer according to the number of GOPs (Group of Picture) which should be contained in the segmentation of each layer, the number of GOPs (Group of Picture) which should be contained in the segmentation of each layer is calculated according to the appropriate data size of the segmentation calculated using the conventional non-layer equal data size segmentation method in traditional P2P system, and after first segmented, the segmentation of the same layer have the equal playback length, then segment the segmentation with the larger data size using the second segmentation method. Finally the experimental results show that the new unequal playback segmentation based on SVC can reduce the complexity of the enhancement layers scheduling in P2P system and enhance the stability of data transmission in P2P network system.