Video coding

The compression ratio difference between intra frame compression and inter frame compression is very big. But the length of the frame size can be changed a lot by only one method, and it can bring on the frame delay, make the network unstable. The delay and unstable will do harm to the application in higher application that needs high real time feature. Frames are divided into several parts, the selection of the compact type is individual, and is controlled by a process in this invention. Compared to the method that using one compactness type, it can not reduce the entire compression ratio, but it can make the difference of the frame size that compacted very small easily. The different pars of the frame have different function, and the function is different. Different parts of the frame are disposed because the change of different parts in the frame is different.