/** @function
********************************************************************************
<PRE>
函数名: voiceToMFCC()
功能: 得到语音的MFCC参数组
用法:
参数:
[IN] pRawVoice: 原始语音数据
[IN] iSampleNum: 语音样本数
[OUT] MFCC: 指向存放MFCC参数组的指针，大小为MFCC[帧数][20]
[IN] train_frame_num: 训练帧帧数
返回:
TRUE: 成功提取
FALSE: 提取失败
调用: PreEmphasis(), JudgeTrainFrame(), FrameMultiHamming(), FrameToMFCC()
主调函数:
备注: 提供给外层的接口
</PRE>
*******************************************************************************/
BOOL voiceToMFCC(BYTE * pRawVoice, int iSampleNum, double ** MFCC, int train_frame_num)
{
double * pDiffVoice = NULL;
double * pDiff = NULL;
VOICEFRAME * pVoiceFrame = NULL; // 指向可用的训练帧
//pDiffVoice = (double *)malloc(iSampleNum * sizeof(double));
pDiffVoice = (double *)calloc(iSampleNum, sizeof(double));
if (!pDiffVoice)
{
xprint("pDiffVoice");
return FALSE;
}
PreEmphasis(pRawVoice, iSampleNum, pDiffVoice); // 预增强
pDiff = JudgeTrainFrame2(pDiffVoice, iSampleNum, train_frame_num);
if (!pDiff) // 判断静寂语音
{
//xprint("Error: It`s silent voice!");
free(pDiffVoice);
return FALSE;
}
pVoiceFrame = (VOICEFRAME *)malloc(train_frame_num * sizeof(VOICEFRAME));
FrameMultiHamming(pDiff, pVoiceFrame, train_frame_num); // 得到频域帧
free(pDiff);
FrameToMFCC(pVoiceFrame, MFCC, train_frame_num); // 从帧得到MFCC参数组
free(pVoiceFrame);
free(pDiffVoice);
return TRUE;
}
/** @function
********************************************************************************
<PRE>
函数名: voiceToMFCC()
功能: 得到语音的MFCC参数组
用法:
参数:
[IN] pRawVoice: 原始语音数据
[IN] iSampleNum: 语音样本数
[OUT] MFCC: 指向存放MFCC参数组的数组指针，大小为MFCC[帧数][20]
返回:
TRUE: 成功提取
FALSE: 提取失败
调用: PreEmphasis(), JudgeTrainFrame(), FrameMultiHamming(), FrameToMFCC()
主调函数:
备注: 提供给外层的接口
</PRE>
*******************************************************************************/
BOOL voiceToMFCC(BYTE * pRawVoice, int iSampleNum, double MFCC[GOOD_FRAME_NUM][D])
{
double * pDiffVoice = NULL;
double * pDiff = NULL;
VOICEFRAME pVoiceFrame[GOOD_FRAME_NUM] = {{NULL}}; //指向可用的训练帧
pDiffVoice = (double *)malloc(iSampleNum * sizeof(double));
if (!pDiffVoice)
{
return FALSE;
}
PreEmphasis(pRawVoice, iSampleNum, pDiffVoice); //预增强
pDiff = JudgeTrainFrame2(pDiffVoice, iSampleNum);
//pDiff = pDiffVoice;
if (!pDiff) //判断静寂语音
{
#ifdef _DEBUG
printf("Error: It`s silent voice!\n");
#endif // _DEBUG
free(pDiffVoice);
return FALSE;
}
FrameMultiHamming(pDiff, pVoiceFrame); //得到频域帧
free(pDiff);
FrameToMFCC(pVoiceFrame, MFCC); //从帧得到MFCC参数组
free(pDiffVoice);
return TRUE;
}