Digital video technology is ubiquitously used in telecommunication and broadcast. Processing and transmission of video and multimedia in Internet and mobile network has received more and more focuses in domestic Information Technology due to the rapid development of Internet and mobile telecommunication since 1990s.  ITU-T/ISO released H.264 video compression standard officially in March, 2003. It is thought as new generation video compression standard because of its outstanding performance. To be more detailed, its bit rate is half of H.263 or MPEG-4 given the same video quality; in another word, its signal-to-noise rate increases significantly given the same bit rate. H.264 is appreciated by researchers and becomes leading standard currently. It is very likely that H.264 will replace MPEG4 gradually while MPEG2 diminishes in market.  Rate control, which is an important part of video compression, controls bit rate of video compression. Quality and transmission of video is subject to rate control algorithm whatever the video coding standard is. It is very important to control video coding in order to obtain optimal compression under the constraint of transmission and computation power in real world.  This paper firstly reviews the classical bit rate control algorithm including RM8 in H.261, TMN8 in H.263, TM5 in MPEG-2 , VM8 in MPEG-4., F086 and G012 in H.264. From the Software implementation of G012, A relationship of YSNR and Bit rate has been reported. Subsequently a new SPP frame is proposed to make general rate control algorithm more efficiently. Software implementation is given based on standard reference code JM (Joint Model). And then test it on FPAG.. At last the idea is validated with conclusion.