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Design and Implementation of AVS Video Real-time Transport System

Author: JiaYuFang
Tutor: HuangHao
School: Huazhong University of Science and Technology
Course: Computer System Architecture
Keywords: Advanced audio and video coding standard Real-time Transport Protocol Transmission system Package
CLC: TN919.8
Type: Master's thesis
Year: 2008
Downloads: 49
Quote: 0
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Abstract


AVS (Audio Video coding Standard) is the second generation source coding standard with our own intellectual property , compared to other existing international video coding standard AVS video standard has a high coding efficiency, technical solutions are simple , low patent fees advantage. The rapid development of today's streaming media technology , streaming media technology and AVS video standard combination of great significance for promoting the application of state-owned standard AVS development . AVS real-time video transmission system based on the RTP (Real-time Transport Protocol) protocol is designed and implemented on the basis of the analysis of various protocols involved in streaming media technology and AVS video coding standard bit- stream structure . The first AVS Video RTP packetization of the key issues in the process of analysis to study and propose solutions . When processing the original video stream of the AVS , the RTP packets are encapsulated to a NALU (Network Abstraction Layer Unit) for the processing unit , on the network transmission shield coding details . RTP encapsulation NALU unit uses three different types of RTP payload formats: single NALU package, the composite package, splitting unit . When a NALU unit is too large , the dividing unit so that the package size of the RTP packet does not exceed the maximum transmission unit of the IP network , NALU unit is too small , the selective use of the composite bag can effectively reduce network overhead . RTP packets sent to control the RTP packet sending rate according to the AVS video streaming frame rate and RTP packet payload format , better jitter smoothing the receiving end . The system consists of two parts of the server and the client . The session control server is divided into the the AVS video processing and RTP package sent three modules , which uses three buffers to implement AVS Video RTP encapsulation , and effectively reduce the algorithm complexity . Client are mainly divided into session control , the RTP packet reception reconciliation package , the framing store three modules , an adaptive real-time adjustment of the receive buffer size algorithm and take the appropriate management strategy can effectively resolve packet loss and disorder problems. The experiments show that the , AVS video transmission system operating normally .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Image communication, multimedia communication
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