Echo elimination method for voice recognition scene
A technology of echo cancellation and speech recognition, which is applied in speech recognition, speech analysis, instruments, etc. It can solve the problems of not having a variety of audio, and achieve the effect of enhancing operation experience, accurate recognition, and reducing interference
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[0025] The technical scheme of the patent of the present invention will be described in detail below in conjunction with the accompanying drawings and examples of implementation.
[0026] refer to figure 2 To implement echo cancellation, two kinds of audio data need to be obtained, namely the input audio data mic_input recorded from the microphone and the audio data speaker_output output from the speaker, because the microphone input audio data mic_input is the recording of all external sounds, which includes some speakers Output the content of the audio data speaker_output. The echo cancellation mentioned here is to eliminate the content of the speaker output audio data speaker_output contained in the microphone input audio data mic_input, and then output a clear speech_input voice. The ultimate goal is to enable the device to recognize external voice commands , expressed in a simple mathematical formula as:
[0027] speech_input = mic_input – F(speaker_output).
[0028] I...
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