DocumentCode :
2577347
Title :
A Cauchy-density-based rate controller for H.264/AVC in low-delay environments
Author :
Del-Ama-Esteban, Óscar ; Sanz-Rodríguez, Sergio ; De-Frutos-López, Manuel ; Díaz-de-María, Fernando
Author_Institution :
Dept. of Signal Theor. & Commun., Univ. Carlos III, Leganes, Spain
fYear :
2009
fDate :
6-8 May 2009
Firstpage :
1
Lastpage :
4
Abstract :
The accuracy of the Cauchy probability density function for modeling of the discrete cosine transform coefficient distribution has already been proved for the frame layer of the rate control subsystem of a hybrid video coder. Nevertheless, in some specific applications operating in real-time low-delay environments, a basic unit layer is recommended in order to provide a good trade-off between quality and delay control. In this paper, a novel basic unit bit allocation for H.264/AVC is proposed based on a simplified Cauchy probability density function source modeling. The experimental results show that the proposed algorithm improves the average peak signal-to-noise ratio in 0.28 and 0.35 dB with respect to two well-known rate control schemes, while maintaining similar peak signal-to-noise ratio standard deviation and buffer occupancy evolution.
Keywords :
discrete cosine transforms; probability; video coding; Cauchy probability density function source modeling; Cauchy-density-based rate controller; H.264/AVC; basic unit bit allocation; buffer occupancy evolution; discrete cosine transform coefficient distribution; hybrid video coder; peak signal-to-noise ratio standard deviation; Automatic voltage control; Bit rate; Communication system control; Delay; Discrete cosine transforms; Laplace equations; PSNR; Probability density function; Radio control; Video coding; H.264; basic unit; bit allocation; low-delay; rate control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Picture Coding Symposium, 2009. PCS 2009
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4244-4593-6
Electronic_ISBN :
978-1-4244-4594-3
Type :
conf
DOI :
10.1109/PCS.2009.5167438
Filename :
5167438
Link To Document :
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