Improving quality of decoded audio by adding noise

The invention relates to code decoding and audio signal method. The invention also relates for coding and decoding the audio signal device. The invention claims further comprises a expressing the audio signal data record and computer - readable media, for transmitting with acted according to the invention code the audio signal device. By the method of code, obtaining the outside of descriptions signal, a code comprises two a code, namely, the first standard code and using the second code. The second code and apparatus for the sketchy composed of signal, to enable is placed on for stochastically, and space between a to acting according to the signal of the first coding decoding. Order to enable a structure capable of realizing any signal, claim drawing of the second encoder which are low bit rate; and two/multiple descriptions a are higher much the Bit speeds.