Title :
Adaptive rate control for Wyner-Ziv video coding
Author :
Esmaili, G. ; Cosman, Pamela
Author_Institution :
Univ. of California, San Diego, La Jolla, CA, USA
Abstract :
In Wyner-Ziv video coding architectures, the available bit budget to each GOP is shared between key frames and Wyner-Ziv frames. In this work, we first propose a model to express the relationship between quantization step size of key and WZ frames based on their motion activity. Then we apply this model to propose an adaptive algorithm adjusting the quantization step size of key and WZ frames to achieve and maintain a target bit rate. We evaluate the rate distortion performance of the proposed method and compare to a common method in the literature.
Keywords :
quantisation (signal); rate distortion theory; video coding; Wyner-Ziv frames; Wyner-Ziv video coding; adaptive algorithm; adaptive rate control; bit budget; key frames; motion activity; quantization step size; rate distortion performance; target bit rate; Decoding; Encoding; PSNR; Quantization; Rate-distortion; Vectors; Video coding; Wyner-Ziv video coding; distributed source coding; rate control;
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.2012.6410822