Dissertation > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > The application of computer network

Research and Implementation of Embedded Network Video Software

Author WangXiaoGuang
Tutor ShenSuBin
School Nanjing University of Posts and Telecommunications
Course Applied Computer Technology
Keywords Embedded Systems Software architecture Network Video Performance measurement
CLC TP393.09
Type Master's thesis
Year 2012
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As computing technology and the development of image processing technology , embedded system technology and network video applications combined with embedded network video application has gradually gained popularity . However, due to the limitations of embedded systems processing resources , and network video applications , we must study the higher requirements of processing resources embedded network video software optimization methods . In order to improve the real - time embedded software network video processing , the efficient allocation of computing resources of embedded systems design and realize a priority-based architecture for embedded software module . The software architecture of embedded systems , network video software re functional partitioning , assigning priority of each module based on the timing relationships in network video processing , and real-time requirements , in order to maximize the use of the computing resources of embedded systems . For use semaphore or mutex mechanism to control concurrent access to shared resources scheduling delays , design and implementation of a priority - based scheduling non-blocking buffer management model . The test results show that , under the same conditions , these embedded network video software optimization method can improve the quality of video playback , to ensure the smooth picture playback . The performance of the network video applications often change with the changes of network load , real-time measurements from the external network video transmission performance . Proposed an RTP-based video delay measurement method using band data transmission independent of the time information of the video data , in order to improve the accuracy of measurement , and based on the video delay measurement needs for network video open source software the Live555 and VLC modifications , to achieve the measurement method, the test results show that the measurement method has a certain degree of accuracy .

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