An Enhanced Screen Codec for Live Lecture Broadcasting
In this paper1, we present the design of SJSC, an enhanced screen codec proposed by us for live lecture broadcasting. Compared to other screen codecs available, SJSC is more suitable for live broadcasting of a lecture on an unreliable transport medium like the Internet due to two features. First, an error-resilience mechanism controls the impact introduced by packet loss onto the decoded screen sequence. Second a unique frame-rate self-adaptation mechanism ensures the bit rate of the encoded stream is capped at a level that the underlying transport can sustainably support. SJSC has been successfully deployed in our p2p streaming based live lecture broadcast system, named PPClass, which has been put into real use in our college for more than 6 months and served 300+classes for an accumulated 9000+remote student base. Both subject assessment by real students and objective evaluation experiments have proved the effectiveness of its design.
Chenping Lu Weikai Xie Zhiqiang Zhang
Continuing Education College, Shanghai Jiaotong University, China
国际会议
上海
英文
108-114
2010-10-20（万方平台首次上网日期，不代表论文的发表时间）