| 摘要 |
A method of for aliasing suppression in a sub-band speaker-phone system, comprising receiving an analog audio signal from a near end analog audio input interface, converting said analog audio signal into a near end digital audio signal using an A2D; receiving N = 2 sub-bands decoded digital audio data from a far-end, merging said N = 2 sub-bands decoded digital audio data into a wideband (WB) decoded digital audio data to be converted by D2A unit and provided to analog audio output interface; splitting said near-end digital audio signal into N = 2 near-end sub-bands digital audio signals; subtracting a simulated digital signal from said sub-band digital audio signal, wherein said simulated digital signal is created by an echo cancelling unit; and applying dynamic anti aliasing suppression (DAAS) with varying aggressiveness on each of said N = 2 near-end sub-band digital audio signals; |
