Sub-band coding

The sub-band coding (or engl. Sub -band coding) is a based on the shannon between sampling technique for audio data compression. In this case, the digital signal is divided into different frequency bands. Each subband is coded depending on its signal level. This go primarily from the ear imperceptible signal components lost ( masking effect, ie, from loud sounds superimposed very soft sounds ). Subband coding is (, MPEG- 1, for example MP3) used among others for the coding according to MPEG audio standards.