求解：高通平台回声消除模块的几个参数是什么意思

nightmoon1010

请教高手：
高通平台的EEC模块有几个参数，我不是很明白: AF_taps   echo_path_delay

请详细解释一下，谢谢！

qiujun

rhf i

feixd818

这两个参数对回声影响不是特别大，不过也有影响，先调试DENS_NL_atten 和DENS_tail_alpha and DENS_tail_portion，如果他们影响不大，然后调试这两个参数试试。

soundquality

我直接貼qualcomm 的解釋
Echo_path_delay
In any system with echo, there is an inherent delay between the original sound and the echo sound. In a mobile telephone, this made up of the delays in the A/D and D/A conversion, filtering, processing, audio I/O buffering, and propagation time between the loudspeaker and microphone.
AF_tape
The number of taps AF_taps of the filter has been chosen to capture the most significant energy in the echo path impulse response, plus additional room/boundary echo. Typically, a larger number of taps is needed when the loudspeaker driver puts out more volume because there is more energy put into the space surrounding the loudspeaker and therefore longer delayed echo paths will be picked up by the microphone. These delays for each mode have been carefully selected and typically do not need adjustment.
這兩參數只要照著文件的值填就可以了
如果你是因為echo 不會過, 原因不在這些參數