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Proceedings Paper

An operational rate control scheme for H.264 with two-stage encoding
Author(s): Do-Kyoung Kwon; Mei-Yin Shen; C.-C. Jay Kuo
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Paper Abstract

An operational rate control (RC) scheme based on two-stage encoding is studied in this research, where frame-layer rate control with a constant bit rate to achieve constant video quality is examined. In the first encoding stage, the R-D optimized mode decision and its associated motion estimation (RDO) as well as DCT/Q, IQ/IDCT and entropy coding are performed for all macroblocks (MBs) for a target frame using an initial quantization parameter (QP), which is the QP of its previous frame. In the second encoding stage, the residual signal from the first stage is encoded using several QP values around the initial QP. Given the target bits and distortion for the current frame, the residual signal is finally encoded using the QP determined by comparing target bits and distortion with actual bits and distortion. To reduce the additional coding complexity of the two-stage encoding, upper and lower bounds around target bits and distortion are employed to reduce the number of encoding required in the second stage. Experimental results are given to show the superior performance of two proposed rate control algorithms, where one targets at the constant bit rate while the other at constant quality.

Paper Details

Date Published: 16 September 2005
PDF: 10 pages
Proc. SPIE 5909, Applications of Digital Image Processing XXVIII, 590910 (16 September 2005); doi: 10.1117/12.613833
Show Author Affiliations
Do-Kyoung Kwon, Univ. of Southern California (United States)
Mei-Yin Shen, Univ. of Southern California (United States)
C.-C. Jay Kuo, Univ. of Southern California (United States)

Published in SPIE Proceedings Vol. 5909:
Applications of Digital Image Processing XXVIII
Andrew G. Tescher, Editor(s)

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