MCI_RECORD参数的改变是否影响SAPI语音识别？

Question

Intially I have specified MCI_WAVE_SET_PARMS at the time of recording as follows:

MCI_WAVE_SET_PARMS mciSetParms;
mciSetParms.wFormatTag = WAVE_FORMAT_PCM;
mciSetParms.wBitsPerSample = 16;
mciSetParms.nChannels = 2;
mciSetParms.nSamplesPerSec = 11050;

Now if I change it to 

MCI_WAVE_SET_PARMS mciSetParms;
mciSetParms.wFormatTag = WAVE_FORMAT_PCM;
mciSetParms.wBitsPerSample = 8;
mciSetParms.nChannels = 1;
mciSetParms.nSamplesPerSec = 8000;

会不会影响SAPI的语音识别？

Answer 1

是的，它会的。SAPI的识别器确实需要至少11 for的16位音频才能很好地识别。给它8 8KHz和8位音频将大大降低识别率(如果你得到任何识别)。

注意-将通道从2降到1根本不会影响SAPI。

Answer 2

我认为这应该会影响到。

请参阅以下链接：

http://en.wikipedia.org/wiki/Acoustic_Model