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Proceedings Paper

An incremental basic unit level QP determination algorithm for H.264/AVC rate control
Author(s): Yu Sun; Yimin Zhou; Zhidan Feng; Zhihai He
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Paper Abstract

In this paper, we propose an incremental-based basic unit (BU) level quantization parameter (QP) determination algorithm for H.264/AVC rate control. Unlike traditional BU level QP computation in existing rate control schemes, the proposed algorithm does not perform target bit allocation and predict coding complexities. Instead, it exploits bit increment to directly determine QP for a BU, aiming at reducing the variations of encoding bits used among BUs within a frame and improve subjective visual quality. To better handle buffer fullness and reduce buffer overflow/ underflow, we explore an enhanced Proportional-Integral-Derivative buffer controller. In addition, the algorithm can also effectively intra-code all frames in a video sequence and has low computational complexity making it suitable for real-time applications. Our experimental results demonstrate that, the proposed algorithm outperforms the rate control algorithm JVT-W042, adopted in the recent H.264/AVC reference model JM13.2, by achieving accurate rate regulation, reducing frame skipping, decreasing quality fluctuation, and improving coding quality up to 1 dB.

Paper Details

Date Published: 19 January 2009
PDF: 9 pages
Proc. SPIE 7257, Visual Communications and Image Processing 2009, 72571N (19 January 2009); doi: 10.1117/12.806049
Show Author Affiliations
Yu Sun, Univ. of Central Arkansas (United States)
Yimin Zhou, Univ. of Central Arkansas (United States)
Univ. of Electronic Science and Technology of China (China)
Zhidan Feng, Acxiom Corp. (United States)
Zhihai He, Univ. of Missouri (United States)

Published in SPIE Proceedings Vol. 7257:
Visual Communications and Image Processing 2009
Majid Rabbani; Robert L. Stevenson, Editor(s)

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