Rate control algorithm for co-located variable bit-rate MPEG-2 video encoders
Sanghoon Lee, Seop Hyeong Park, Sang H. Lee · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1996
In this paper, we propose a rate control algorithm for co-located multiple VBR MPEG-2 video encoders in multi-program environments. The proposed algorithm aims to improve the average picture quality, as well as to make the quality of each picture equal under buffer constraints. We control each rate while referring transmission rate over network and observing the traffic of the other video sources by monitoring the fullness of a virtual buffer in the system. To maintain uniform picture quality we keep the variance of quantization parameters as small as possible within a picture. Experimental results show that the proposed algorithm gives more than 1 dB improvement in PSNR compared to the rate control algorithm in MPEG2 TM5. This scheme is able to be applied to traditional constant bandwidth channel as well as ATM network by adapting both CBR and VBR multiplexing transmission rates.