AUDIO DEVICE FOR RECOGNIZING KEY PHRASES AND METHOD THEREOF
First Claim
1. An audio device, coupled to a host device, comprising:
- an acoustic conversion circuit, configured to convert an acoustic wave into an analog audio signal;
an analog-to-digital converter (ADC), coupled to the acoustic conversion circuit, configured to convert the analog audio signal into digital audio data; and
a controller comprising;
a first-level voice detection circuit, coupled to the acoustic conversion circuit, configured to detect voice activity in the analog audio signal;
a second-level voice detection circuit, coupled to the first-level voice detection circuit, configured to detect a beginning syllable of a key phrase in the digital audio data when the voice activity is detected; and
a third-level voice detection circuit, coupled to the second-level voice detection circuit, configured to detect the key phrase from the digital audio data only when the beginning syllable of the key phrase is detected in the digital audio data.
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Accused Products
Abstract
An audio device and a method thereof are provided. The method is adopted by an audio device to detect a voice, wherein the audio device is coupled to a host device. The method includes an acoustic conversion circuit converting an acoustic wave into an analog audio signal; an analog-to-digital converter (ADC) converting the analog audio signal into digital audio data; a first-level voice detection circuit detecting voice activity in the analog audio signal; a second-level voice detection circuit detecting a beginning syllable of a key phrase in the digital audio data when the voice activity is detected in the digital audio data; and a third-level voice detection circuit detecting the key phrase from the digital audio data only when the beginning syllable of the key phrase is detected in the digital audio data.
23 Citations
18 Claims
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1. An audio device, coupled to a host device, comprising:
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an acoustic conversion circuit, configured to convert an acoustic wave into an analog audio signal; an analog-to-digital converter (ADC), coupled to the acoustic conversion circuit, configured to convert the analog audio signal into digital audio data; and a controller comprising; a first-level voice detection circuit, coupled to the acoustic conversion circuit, configured to detect voice activity in the analog audio signal; a second-level voice detection circuit, coupled to the first-level voice detection circuit, configured to detect a beginning syllable of a key phrase in the digital audio data when the voice activity is detected; and a third-level voice detection circuit, coupled to the second-level voice detection circuit, configured to detect the key phrase from the digital audio data only when the beginning syllable of the key phrase is detected in the digital audio data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, adopted by an audio device to detect a voice, wherein the audio device is coupled to a host device, the method comprising:
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converting, by an acoustic conversion circuit, an acoustic wave into an analog audio signal; converting, by an analog-to-digital converter (ADC), the analog audio signal into digital audio data; and detecting, by a first-level voice detection circuit, voice activity in the analog audio signal; detecting, by a second-level voice detection circuit, a beginning syllable of a key phrase in the digital audio data when the voice activity is detected in the digital audio data; and detecting, by a third-level voice detection circuit, the key phrase from the digital audio data only when the beginning syllable of the key phrase is detected in the digital audio data. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification