参数资料
型号: AC300030
厂商: Microchip Technology
文件页数: 56/64页
文件大小: 0K
描述: KIT ACOUSTIC ACCESSORY
标准包装: 1
附件类型: 配件套件
适用于相关产品: 杂讯抑制/回声消除库
dsPIC ? DSC Acoustic Echo Cancellation Library User’s Guide
EC_estimateERLE
Description
Estimates the Echo Return Loss Enhancement (ERLE).
Include
ec_api.h
Prototype
int EC_estimateSNR(int* preEC, int* postEC);
Arguments
preEC
postEC
a pointer to the buffer of data before the AEC algorithm has been
applied
a pointer to the buffer of data after the AEC algorithm has been
applied
Return Value
An estimate of the ERLE.
Remarks
This is a crude estimate of the ERLE of the current frame of data.
Code Example
int erle;
for (i = 0; i < EC_FRAME; i++)
{
nearEndBefore[i] = nearEndIn[i];
}
EC_apply(ecStateMemX, ecScratchY, nearEndIn, farEndIn, EC_TRUE);
EC_applyNLP(ecStateMemX, nearEndIn, EC_TRUE);
erle = EC_estimateSNR(nearEndBefore, nearEndIn);
erle contains the estimate of the ERLE (in dB).
DS70134F-page 56
? 2004-2011 Microchip Technology Inc.
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