Sciweavers

Share
ISCAS
2008
IEEE

A novel fine rate control algorithm with adaptive rounding offset

9 years 4 months ago
A novel fine rate control algorithm with adaptive rounding offset
— The rate control algorithm is of essential importance to a video encoder. It enables the encoded bitstream to meet the bandwidth and storage requirement while maintaining good video quality. Most existing works adjust the quantization step size to achieve the required bit rate accuracy. This paper introduces a new dimension: the quantization rounding offset into a frame-level fine rate control algorithm. Specifically, we propose a novel fine rate control algorithm based on a linear model between the bit rate and the rounding offset. Unlike the quantization step size that has a limited number of choices, the quantization rounding offset is a continuously adjustable variable which allows the rate control algorithm to reach any precision in principle. Extensive experiment results show that the proposed algorithm greatly improves the bit rate accuracy and provides better visual quality by fine tuning of the rounding offset in addition to the quantization step size.
Yali Liu, Xiaoan Lu, Cristina Gomila, Qian Xu
Added 31 May 2010
Updated 31 May 2010
Type Conference
Year 2008
Where ISCAS
Authors Yali Liu, Xiaoan Lu, Cristina Gomila, Qian Xu
Comments (0)
books