Method and apparatus for encoding/decoding of background sounds

The optical the digital the base voice coder and/or the decoding for a method and device for code decoding and/or to the background sound, and encoder and/or the decoding with a signal source is connected with a filter, a filter is defined (12) of each group of filter parameter, the position and/or code decoding of a signal reproduction. The method comprises the following steps: Detection by the encoder/decoder's signal is mainly expresses the voice or a background sound (16); A when the signal of which represents a background sound, based on transition diodes and/or the limiting of the continuous frame is arranged on a set of parameter at least some filter parameter ranges (18).