TY - JOUR
T1 - Rate-distortion modeling for efficient H.264/AVC encoding
AU - Tu, Yu Kuang
AU - Yang, Jar Ferr
AU - Sun, Ming Ting
N1 - Funding Information:
Manuscript received April 6, 2006; revised June 23, 2006. This work was supported in part by the National Science Council, Taiwan, R.O.C., under Contract NSC-92-2213-E006-023. This paper was recommended by Associate Editor Z. He.
PY - 2007/5
Y1 - 2007/5
N2 - The rate-distortion (R-D) optimization technique plays an important role in optimizing video encoders. Modeling the rate and distortion functions accurately in acceptable complexity helps to make the optimization more practical. In this paper, we propose a bit-rate estimation function and a distortion measure by modeling the transform coefficients with spatial-domain variance. Furthermore, with quantization-based thresholding to determine the number, the absolute sum, and the squared sum of transform coefficients, the simplified transform-domain R-D measurement is introduced. The proposed algorithms can reduce the computation complexity for the R-D optimized mode-decision by using the new cost function evolving from the simplified transform-domain R-D model. Based on the proposed estimations, a rate-control scheme in the macroblock layer is also proposed to improve the coding efficiency.
AB - The rate-distortion (R-D) optimization technique plays an important role in optimizing video encoders. Modeling the rate and distortion functions accurately in acceptable complexity helps to make the optimization more practical. In this paper, we propose a bit-rate estimation function and a distortion measure by modeling the transform coefficients with spatial-domain variance. Furthermore, with quantization-based thresholding to determine the number, the absolute sum, and the squared sum of transform coefficients, the simplified transform-domain R-D measurement is introduced. The proposed algorithms can reduce the computation complexity for the R-D optimized mode-decision by using the new cost function evolving from the simplified transform-domain R-D model. Based on the proposed estimations, a rate-control scheme in the macroblock layer is also proposed to improve the coding efficiency.
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U2 - 10.1109/TCSVT.2007.894041
DO - 10.1109/TCSVT.2007.894041
M3 - Article
AN - SCOPUS:34247598510
SN - 1051-8215
VL - 17
SP - 530
EP - 543
JO - IEEE Transactions on Circuits and Systems for Video Technology
JF - IEEE Transactions on Circuits and Systems for Video Technology
IS - 5
ER -