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Design and Implementation of the Video Processing System

Author: YangFeng
Tutor: LiuHaiHua
School: Central South University for Nationalities
Course: Biomedical Engineering
Keywords: Telemedicine Video processing Embedded Systems Real-time processing MPEG-4
CLC: R319
Type: Master's thesis
Year: 2008
Downloads: 90
Quote: 1
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Abstract


With the rapid development of network technology , network - based video applications is growing . Telemedicine technology with the video network technology to exchange separated by both patient medical clinical data and expert opinion , audio and video , graphics , or other form of transfer of medical information . Therefore , the real-time processing and transmission of video images is of great significance for the construction of telemedicine . Video encoding speed and video reception and playback performance is one of the main problems , the above requirements , expand the following research : TCP / IP using the IP network protocol , to build the hardware platform , the use of embedded multimedia processor DM642 client / server model to establish a real-time video transmission system . In the server side of the video processing , analysis of the structure of the source code of the MPEG-4 standard XVID , and use of multi - thread pipeline structure of video processing algorithms , the server program optimization . DM642 eight parallel arithmetic unit features software pipelining way or linear assembly , a large number of round-robin algorithm in video encoding optimization ; same time , combined with the characteristics of the storage system in the DM642 multi - level cache , using the data package processing technology , EDMA technology to optimize video processing in data acquisition and inline function the TI company IMG library functions optimized code execution efficiency . Experimental results show that , according to the above method , you can reach more than 30 frames per second the CIF image processing speed to meet the requirements of real-time processing of video data , which laid the foundation for real-time video image transmission and display . Client in the system , in order to ensure real-time playback of video images , the proposed structure of a double-ended double-buffered , multi-threaded applications , to achieve real-time decoding and playback of video images . The experimental results show that this structure, the playback frame rate of 30 frames per second video stream can be achieved , and to ensure the continuity of the video playback , and to meet the requirements of practical application . In summary, the DM642 multimedia processor features, the software architecture for real - time video image processing system , the optimization of the code execution speed real-time processing of video data , applied to the telemedicine system , has an important application value.

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CLC: > Medicine, health > Basic Medical > Medical science in general > Other science and technology in medicine
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