Title :
Analysis of video codec buffer and delay under time-varying channel
Author :
Zhifeng Chen ; Reznik, Yuiry
Author_Institution :
InterDigital Commun., San Diego, CA, USA
Abstract :
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.
Keywords :
Long Term Evolution; jitter; time-varying systems; video codecs; LTE simulator; decoder buffer overflow; decoder buffer underflow; delay; low-delay applications; time-varying channel; video codec buffer analysis; Bit rate; Decoding; Delay; Encoding; Jitter; PSNR; Time-varying channels; H.264/MPEG-4 AVC; HRD; LTE; Leaky bucket model; Rate control; VBV;
Conference_Titel :
Visual Communications and Image Processing (VCIP), 2012 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4673-4405-0
Electronic_ISBN :
978-1-4673-4406-7
DOI :
10.1109/VCIP.2012.6410794