Video-frequency band scheduling and transmission method used for peer to peer (P2P) three-dimensional streaming medium system
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A scheduling method and video segment technology, which is applied in the field of P2P 3D streaming media transmission based on network coding, can solve the problems of not considering MVC coding characteristics, etc., and achieve the effect of enriching 3D stereo effects, reducing computing overhead, and small startup delay
Inactive Publication Date: 2013-08-21
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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In this solution, video segments are not prioritized according to their weights. It is only a segment scheduling strategy for P2P streaming media using SVC, without considering the encoding characteristics of MVC. It is not a general policy applicable to all P2P streaming media. System solutions
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Embodiment 1
[0080] The network coding-based P2P3D streaming transmission method of the present invention is implemented in a push manner, and this solution can save the time and overhead of requesting a bitmap (bitmap) to a node. see Figure 6 , the specific implementation process is as follows:
[0081] S101: Client logs in to Tracker and requests Peerlist;
[0082] S102: Tracker returns the required Peerlist to Client;
[0083] S103: After receiving the Peerlist, the Client first checks the segments involved in the current sliding window (a multi-dimensional buffermap can be used to represent all video segments contained in the current sliding window, for example Figure 5 The 9 video segments shown. And mark the local existing segments in the buffermap, such as 1 means yes, 0 means no, wherein, for the content server, its buffermap is all 1 at the beginning) After sorting according to the scheduling and sorting rules of the present invention, one-dimensional The bitmap, and referri...
Embodiment 2
[0091] The network coding-based P2P3D streaming transmission method of the present invention can also be implemented in a pull manner, so as to adapt to different demand occasions. see Figure 7 , the specific implementation steps are as follows:
[0092] S201: Client logs in to Tracker and requests Peerlist;
[0093] S202: Tracker returns the required Peerlist to Client;
[0094] S203: After receiving the Peerlist, the Client actively initiates a connection request bitmap to the Peer;
[0095] S204: After the Peer receives the bitmap request from the Client, it first checks the neighbor list it maintains. If the number of neighbors it currently maintains does not exceed the maximum number of neighbors it can maintain, it sorts its own bitmap according to the scheduling rules. Send to Client; if Peer has reached the maximum number of neighbors that can be maintained, then discard this bitmap request;
[0096] S205: After receiving the bitmap returned by the Peer, the Clien...
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Abstract
The invention discloses a video-frequency band scheduling and transmission method used for a peer to peer (P2P) three-dimensional streaming medium system, and belongs to the field of P2P three-dimensional streaming media. The scheduling method comprises the steps of successively arranging priority levels of following existing relevance video-frequency bands based on a video point time and a play time from a high priority level to a low priority level, wherein a current video-frequency band belongs to the video point time and the play time, and the following existing relevance video-frequency bands comprise a video-frequency band of a next even video point with the same play time, a video-frequency band of a next play time with the same video point, and a video-frequency band of an upper odd video point and a lower odd video point at the same play time if the video point which the current video-frequency band belongs to is an even video point, and the priority of the upper odd video point is higher than that of the lower odd video point; if the relevance video-frequency bands have already been in a video-frequency band scheduling sequence, skipping the relevance video-frequency bands; then, sequencing the relevance video-frequency bands according to the priority levels from high to low, and sequentially arranging the relevance video-frequency bands in the video-frequency band scheduling sequence. Based on the scheduling method, the video-frequency band transmission method is provided. According to the video-frequency band scheduling and transmission method used for the P2P three-dimensional streaming media system, play efficiency of videos can be improved, and system throughput of the P2P three-dimensional streaming medium system can be improved.
Description
technical field [0001] The invention belongs to P2P three-dimensional streaming media, in particular to a video segment scheduling method used in a P2P three-dimensional streaming media system, and a P2P three-dimensional streaming media transmission method based on network coding. Background technique [0002] With the continuous development of three-dimensional (3D) technology and users' demand for high-quality sensory effects, the future development direction of video technology must be converted from flat display to stereoscopic display. Compared with two-dimensional video, stereoscopic video increases the depth information of vision and enhances the sense of reality of vision. And with the development of computer, communication and network technology, the application prospect of stereoscopic video has become more and more extensive, such as digital TV, distance education, video conferencing, remote industrial control and other aspects. [0003] In order to further impr...
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