Low-Delay Rate Control for Consistent Quality Using Distortion-Based Lagrange Multiplier

Video quality fluctuation plays a significant role in human visual perception, and hence, many rate control approaches have been widely developed to maintain consistent quality for video communication. This paper presents a novel rate control framework based on the Lagrange multiplier in high-effici...

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Bibliographic Details
Published in:IEEE transactions on image processing 2016-07, Vol.25 (7), p.2943-2955
Main Authors: Wang, Miaohui, Ngan, King Ngi, Li, Hongliang
Format: Article
Language:English
Subjects:
Bit rate
Buffers
Coding
Complexity theory
Computational modeling
Constants
Control systems
Deviation
Distortion
distortion model
Fluctuation
HEVC
Lagrange multiplier
Lagrange multipliers
Quality
Rate control
Streaming media
Video communication
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Summary:Video quality fluctuation plays a significant role in human visual perception, and hence, many rate control approaches have been widely developed to maintain consistent quality for video communication. This paper presents a novel rate control framework based on the Lagrange multiplier in high-efficiency video coding. With the assumption of constant quality control, a new relationship between the distortion and the Lagrange multiplier is established. Based on the proposed distortion model and buffer status, we obtain a computationally feasible solution to the problem of minimizing the distortion variation across video frames at the coding tree unit level. Extensive simulation results show that our method outperforms the rate control used in HEVC Test Model (HM) by providing a more accurate rate regulation, lower video quality fluctuation, and stabler buffer fullness. The average peak signal-to-noise ratio (PSNR) and PSNR deviation improvements are about 0.37 dB and 57.14% in the low-delay (P and B) video communication, where the complexity overhead is ~4.44%.
ISSN:1057-7149
1941-0042
DOI:10.1109/TIP.2016.2552646