Analysis of video codec buffer and delay under time-varying channel

作者：Chen Zhifeng^*; Reznik Yuriy

来源：2012 IEEE Visual Communications and Image Processing, VCIP 2012, 2012-11-27 to 2012-11-30.

DOI：10.1109/VCIP.2012.6410794

• H.264/MPEG-4 AVC
• HRD
• Leaky buckets
• LTE
• Rate controls
• VBV

In this paper, we analyze the effect of time-varying channels to video codec buffer specially for low-delay applications. We derive the sufficient conditions under which an encoder can design a bitstream for any time-varying channel without decoder buffer overflow and underflow. We then apply those conditions to design a bandwidth adaptive rate control in x264 and test it under LTE simulator. Our test results show significant improvement of delay and delay jitter over traditional leaky bucket models.

• 出版日期2012