Channel switch frame

The invention further claims a method for processing multimedia data used more quickly the channel obtains improvement of the error restoring and improve the efficiency of the method and apparatus for. Encoder device makes use of inter-frame encoding for encoding multi-media data the first part so as to generate a first version and the using intra-frame coding for coding multimedia data of said first part to generate the second version. Decoding device receiving multimedia data a first portion of the first version of the first version is inter-frame coding; Receiving multimedia data of the first part of the second version wherein said second plate to the intra-frame coding; And selectively decoding the first and second receiving version.