Real-Time Frame-Layer Rate Control for Low Bit Rate Video over the Internet

Yoon KIM  Jae-Young PYUN  Jae-Hwan JEONG  Sung-Jea KO  

IEICE TRANSACTIONS on Communications   Vol.E87-B    No.3    pp.598-604
Publication Date: 2004/03/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Internet Technology IV)
Category: Multimedia Communication
frame-layer rate control,  sliding window,  R-D model,  Lagrangian multiplier,  

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A real-time frame-layer rate control algorithm using sliding window method is proposed for low bit rate video coding over the Internet. The proposed rate control method performs bit allocation at the frame level to minimize the average distortion over an entire sequence as well as variations in distortion between frames. A new frame-layer rate-distortion model is derived, and a non-iterative optimization method is used for low computational complexity. In order to reduce the quality fluctuation, we use a sliding window scheme which does not require the pre-analysis process. Therefore, the proposed algorithm does not produce time delay from encoding, and is suitable for real-time low-complexity video encoder. Experimental results indicate that the proposed control method provides better visual and PSNR performance than the existing TMN8 rate control method.