subband coding (SBC)

A type of speech compression in the frequency domain in which the speech spectrum is first divided into a fixed number of bands, whereupon each band is shifted to zero frequency, sampled, and companded. At the receiving end, each sample is modulated back to its original spectral position to provide the output speech signal.; 一種頻域語音壓縮法,它首先將語音頻譜分為固定數目的波段,然后將每個波段移至零頻,并對其進行采樣和壓擴。在接收端將每個采樣調制回到它原 來的頻譜位置以給出輸出語音信號。