微型机与应用
微型機與應用
미형궤여응용
MICROCOMPUTER & ITS APPLICATIONS
2015年
10期
44-47
,共4页
视频监控%数字喷泉码%LT 码%度分布
視頻鑑控%數字噴泉碼%LT 碼%度分佈
시빈감공%수자분천마%LT 마%도분포
video surveillance%digital fountain codes%LT codes%degree distribution
传统的视频监控系统在纠错性能方面存在着诸多不足，当信道丢包率较大时进行可靠的视频传输显得较为困难。为此，结合 RTP 传输的优势，设计了一种使用数字喷泉码进行丢包恢复的视频监控系统。首先研究实用的数字喷泉码———LT 码，比较了不同度分布算法下 LT 码的译码性能。根据视频传输系统的应用需求，选择鲁棒孤子度分布算法，研究短码长条件下影响 LT 码译码性能的主要因素。
傳統的視頻鑑控繫統在糾錯性能方麵存在著諸多不足，噹信道丟包率較大時進行可靠的視頻傳輸顯得較為睏難。為此，結閤 RTP 傳輸的優勢，設計瞭一種使用數字噴泉碼進行丟包恢複的視頻鑑控繫統。首先研究實用的數字噴泉碼———LT 碼，比較瞭不同度分佈算法下 LT 碼的譯碼性能。根據視頻傳輸繫統的應用需求，選擇魯棒孤子度分佈算法，研究短碼長條件下影響 LT 碼譯碼性能的主要因素。
전통적시빈감공계통재규착성능방면존재착제다불족，당신도주포솔교대시진행가고적시빈전수현득교위곤난。위차，결합 RTP 전수적우세，설계료일충사용수자분천마진행주포회복적시빈감공계통。수선연구실용적수자분천마———LT 마，비교료불동도분포산법하 LT 마적역마성능。근거시빈전수계통적응용수구，선택로봉고자도분포산법，연구단마장조건하영향 LT 마역마성능적주요인소。
Traditional video surveillance system has some problems in error-correcting, so it′s difficult to achieve reliable transmission on high-loss network. To solve the problem, this paper designs an IP video surveillance system based on digital fountain codes with the advantage of RTP. Taking LT codes as the research object, this paper studies its performance based on different degree distribution. According to the practical requirement, this paper chooses Robust Soliton Distribution algorithm for the system and studies the factors that affect the performance of LT codes with small message length.
