①中山大学电子与通信工程系 广州 510275;②CS Dept., Univ. of Missouri-Columbia, MO65201, USA
Constant-SNR Bit Allocation in Video Quality Control
Kang Xian-gui①; Zhuang Xin-hua②
①Dept. of Electronics and Communication Engineering, Sun Yat-Sen University, Guangzhou 510275, China; ②CS Dept., Univ. of Missouri-Columbia, MO65201, USA
Abstract：A single-pass frame-level Constant-SNR Bit Allocation (CSNRBA) scheme is developed for video quality smoothing throughout the video sequence in this paper. A power series weighted actual SNR average of previous coded frames is adopted as the target SNR for the current frame. According to the newly developed analytic close-form D-Q model and the linear rate control algorithm, the bit budget can be estimated. Experimental results show that the proposed CSNRBA scheme provides much smoother video quality and achieves much better subjective video quality in terms of natural color, sharp objects and silhouette significantly on all testing video sequences than both constant bit allocation and constant PSNR bit allocation schemes.
2007, Vol. 29 
