A decoding method and device

The invention relates to a decoding method and device. The invention comprising a data frame of the receiving end code generator, comprising a frame, and calculating of current of the spectrum parameter, and the decoding operation obtaining the decoding the data of the computer determination of the spectrum parameter, determined for bad the treatment process of spectrum parameter comprises: First, determined current occurred of continuous frame and quantity of the spectrum parameter and spectrum parameter of rubber frame of the average value; Then, according to the continuous of the frame, the middle of spectrum parameter a connected to the spectrum parameter the constant average value is placed on the self-adaptive displacement, the computer obtaining the current of the spectrum parameter information. Layer the invention is a continuously of frame, is recently the middle frame spectrum parameter and current of spectrum frame parameter degree of correlation gradually, so the invention claims a accurate current of the spectrum parameter, is made of the same code and connected with the error rate is a obtain better voice quality.