NDLI: A Lagrangian optimized rate control algorithm for the H.264/AVC encoder

Content Provider	IEEE Xplore Digital Library
Author	Ghandi, M.M. Ghanbari, M.
Copyright Year	2004
Description	Author affiliation: Dept. of Electron. Syst. Eng., Essex Univ., Colchester, UK (Ghandi, M.M.; Ghanbari, M.)
Abstract	The H.264/AVC video coding standard has been recently presented by the Joint Video Team of ITU-T and MPEG experts. The AVC encoder achieves video bitstreams at the same quality as the previous standard coders, while requiring typically 50% of the bit rate. This paper proposes a Lagrangian optimized rate control algorithm for the H.264/AVC video encoder. It controls the bit rate by adjusting the Lagrangian multiplier for every picture and specifying the quantizer parameter for every macroblock. In the proposed method, the accuracy of desired bit rate is tunable by allocating more searching time to the encoder. Experimental results show that the proposed method gives a quality improvement of about 0.5 dB when compared to the rate control method utilized in the JM7.4 test model, with an acceptable encoder complexity.
Starting Page	123
Ending Page	126
File Size	272054
Page Count	4
File Format	PDF
ISBN	0780385543
ISSN	15224880
DOI	10.1109/ICIP.2004.1418705
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-10-24
Publisher Place	Singapore
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Lagrangian functions Automatic voltage control Quadratic programming Bit rate Encoding Optimization methods Video coding Rate-distortion Software testing Systems engineering and theory
Content Type	Text
Resource Type	Article

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