Sound end detecting method for sound identifying system
A speech recognition and endpoint detection technology, applied in speech recognition, speech analysis, instruments, etc., can solve the problems of multi-band, difficult to accurately detect speech endpoints, unreliable signal-to-noise ratio estimation, etc., and achieve a small amount of calculation Effect
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[0036] The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.
[0037] figure 2 It is a flow chart of the speech endpoint detection method applied to the speech recognition system provided by the present invention, as shown in the figure:
[0038] Step 101: Input the digitized voice data, and process the voice data into frames. Generally speaking, the frame length is 25ms, and the frame shift is 10ms. Then enter step 102 and step 105 respectively. Wherein step 102 and step 105 can be performed at the same time, or step 102 can be performed first, and then step 105 can be performed when the formant trajectory needs to be used for endpoint detection.
[0039] Step 102: Perform FFT operation on the speech data in units of frames.
[0040] Step 103: Divide the subbands according to the speech of the first 10 frames. The principle and specific process of dividing subbands are as follows:
[0041] For most...
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