A unified architecture for real-time video-coding systems

作者：Li ZG^*; Zhu C; Ling N; Yang XK; Feng GN; Wu S; Pan F

来源：IEEE Transactions on Circuits and Systems for Video Technology, 2003, 13(6): 472-487.

DOI：10.1109/TCSVT.2003.813420

• adaptive rate control
• congestion control
• joint source and channel coding
• packetization
• unequal error control
• video over the Internet

This paper presents a unified architecture for a live video over the Internet with emphasis on solving some challenging problems such as network bandwidth adaptation for rate and congestion, loss packet recovery, joint source and channel coding, and packetization. In our architecture, a time-varying bit rate for the source coding and time-varying ratios for the channel coding are simultaneously computed by a new congestion-control protocol. An adaptive rate-control scheme is then proposed to calculate quantization parameters and to determine the number of skipping frames corresponding to the bit rate. An adaptive unequal error-control scheme is also provided to protect the bitstream. Furthermore, a simple and MPEG-4 standard compatible algorithm is designed to packetize generated bitstream at the SyncLayer by using the existing resynchronization marker approach. With the proposed architecture, the coding efficiency and the robustness of the whole system are improved greatly.

• 出版日期2003-6
• 单位南阳理工学院