Patent
Voice recognition system, method, and program
Toru Iwasawa
- 27 Feb 2008
4
TL;DR: A voice recognition system comprises a voice input unit, a voice detection unit, and a control unit that outputs a control signal to at least one of the voice inputs and the detection unit and suppresses a detection frequency if the detection frequency satisfies a predetermined condition as discussed by the authors.
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Abstract: A voice recognition system comprises: a voice input unit that receives an input signal from a voice input element and output it; a voice detection unit that detects an utterance segment in the input signal; a voice recognition unit that performs voice recognition for the utterance segment; and a control unit that outputs a control signal to at least one of the voice input unit and the voice detection unit and suppresses a detection frequency if the detection frequency satisfies a predetermined condition.
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Citations
Patent
Method and apparatus for adjusting detection threshold for activating voice assistant function
Minsub Lee,Taesu Kim,Kyu Woong Hwang,Minho Jin +3 more
- 17 Sep 2013
TL;DR: In this article, a method for activating a voice assistant function in a mobile device is disclosed, which includes receiving an input sound stream by a sound sensor and determining a context of the mobile device.
45
Patent
Method and apparatus for controlling voice activation
Sungrack Yun,Minho Jin,Taesu Kim,Kyu Woong Hwang +3 more
- 24 Apr 2014
TL;DR: In this article, a method for controlling voice activation by a target keyword in a mobile device is disclosed, which includes receiving an input sound stream and activating the voice activation unit to detect the target keyword.
36
A Spatio–Temporal Speech Enhancement Technique Based on Generalized Eigenvalue Decomposition
Malay Gupta,Scott C. Douglas +1 more
TL;DR: Application of the method to microphone array data in various environmental settings indicate that the procedure can achieve significant gains in signal-to-interference ratios (SIRs) even in low SIR environments, without introducing musical tone artifacts in the enhanced speech.
21
References
Patent
Method and device for detecting and separating voices in a complex musical composition
Jr. Richard O. Sykes
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TL;DR: In this paper, a system and method for detecting, separating and recording the individual voices in a musical composition performed by a plurality of instruments is presented, where the electrical waveform signal for the multi-voiced musical composition is fed to a waveform converter to convert the waveform signals to a frequency spectrum representation, where it is compared to predetermined steady state frequency spectrum representations for a particular musical instrument.
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Voice activity detection system and method
TL;DR: In this article, an improved voice activity detection system and method is provided for use in speakerphones and other voice activated systems, which utilizes a new voice energy term which is based on an integral of the absolute value of a derivative of a speech signal.
68
System and method for noise threshold adaptation for voice activity detection in nonstationary noise environments
TL;DR: In this article, the authors proposed an approach based on the "lower envelope" of the smoothed input signal power for determining the time at which a snapshot of noise characteristics results in improved adaptation of noise floors used in voice detection.
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Patent
Signal band expanding method and apparatus and signal synthesis method and apparatus
Shiro Omori,Masayuki Nishiguchi +1 more
- 14 Oct 1999
TL;DR: In this article, the frequency characteristics of high-frequency components of broad-band signals can be adjusted to the liking of the user, overflow due to addition is prevented from occurring without power variations being perceived by a user, the number of broad band formants is reduced, and emphasis is attached to the rough structure of the spectrum.
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Noise suppression in the frequency domain by adjusting gain according to voicing parameters
TL;DR: In this article, a signal gain is calculated based on the estimated signal to noise ratio and a voicing parameter, which is determined based on a signal ahead of the frequency domain signal with respect to time.
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