US5353376A
Expired / Lapsed
US
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System and method for improved speech acquisition for hands-free voice telecommunication in a noisy environment
Assignee: Texas Instruments Inc
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Filing: 1992-03-20
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Granted: 1994-10-04
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Expires: 2012-03-20
Abstract
Abstract Systems and methods for improved speech acquisition are disclosed including a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto, a beamformer connected to the sensors to cancel a preselected noise portion of the signals to thereby produce a processed signal, and a speech recognition system to recognize the processed signal and to respond thereto. The beamformer may also include an adaptive filter with enable/disable circuitry for selectively training the adaptive filter a predetermined period of time. A highpass filter may also be used to filter a preselected noise portion of the sensed signals before the signals are forwarded to the beamformer. The speech recognition system may include a speaker independent base which is able to be adapted by a predetermined amount of training by a speaker, and which system includes a voice dialer or a speech coder for telecommunication.
Inventors
- 👤 Sang G. Oh
- 👤 Vishu R. Viswanathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:32
CPC Classifications
G; G10; G10L; G10L15/00; G10L15/20; G10L21/00; G10L21/02; G10L21/0208; G10L21/0216; G10L2021/02161; G10L2021/02166
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
152 words
A system for an improved acquisition of speech comprising: a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto; a highpass filter to filter a preselected first noise portion from said signals received from said linearly arrayed sensors; a beamformer, connected to said highpass filter, to cancel a preselected second noise portion from said filtered signals thereby producing a processed signal; and a speech application system, connected to receive said processed signal from said beamformer, for receiving and responding to said processed signal, wherein said beamformer is a generalized sidelobe canceler, comprising a delay and sum beamformer, an adaptive noise canceler and an adder which produces said processed signal, and wherein said adaptive noise canceler comprises a blocking matrix, an adaptive filter and an adder, and wherein said adaptive filter comprises enable/disable circuitry for selectively adapting said adaptive filter for a predetermined period of time.
Claim 2
Independent Claim
152 words
A system for an improved acquisition of speech comprising: a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto; a highpass filter to filter a preselected first noise portion from said signals received from said linearly arrayed sensors; a beamformer, connected to said highpass filter, to cancel a preselected second noise portion from said filtered signals thereby producing a processed signal; and a speech application system, connected to receive said processed signal from said beamformer, for receiving and responding to said processed signal, wherein said beamformer is a generalized sidelobe canceler, comprising a delay and sum beamformer, an adaptive noise canceler and an adder which produces said processed signal, and wherein said adaptive noise canceler comprises a blocking matrix, an adaptive filter and an adder, and wherein said adaptive filter comprises enable/disable circuitry for selectively adapting said adaptive filter for a predetermined period of time.
Claim 3
Independent Claim
103 words
A system for an improved acquisition of speech comprising: a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto; a highpass filter to filter a preselected first noise portion from said signals received from said linearly arrayed sensors; a beamformer, connected to said highpass filter, to cancel a preselected second noise portion from said filtered signals thereby producing a processed signal; and a speech application system, connected to receive said processed signal from said beamformer, for receiving and responding to said processed signal, wherein said speech application system is a speech coder with a communications link.
Claim 4
Independent Claim
103 words
A system for an improved acquisition of speech comprising: a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto; a highpass filter to filter a preselected first noise portion from said signals received from said linearly arrayed sensors; a beamformer, connected to said highpass filter, to cancel a preselected second noise portion from said filtered signals thereby producing a processed signal; and a speech application system, connected to receive said processed signal from said beamformer, for receiving and responding to said processed signal, wherein said speech application system is a speech coder with a communications link.
Claim 5
Independent Claim
100 words
A system for an improved acquisition of speech comprising: a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto; a highpass filter to filter a preselected first noise portion from said signals received from said linearly arrayed sensors; a beamformer, connected to said highpass filter, to cancel a preselected second noise portion from said filtered signals thereby producing a processed signal; and a speech application system, connected to receive said processed signal from said beamformer, for receiving and responding to said processed signal, wherein said speech application system is a speech recognition system.
Claim 6
Independent Claim
100 words
A system for an improved acquisition of speech comprising: a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto; a highpass filter to filter a preselected first noise portion from said signals received from said linearly arrayed sensors; a beamformer, connected to said highpass filter, to cancel a preselected second noise portion from said filtered signals thereby producing a processed signal; and a speech application system, connected to receive said processed signal from said beamformer, for receiving and responding to said processed signal, wherein said speech application system is a speech recognition system.
Claim 7
Dependent Claim
27 words
The system of claim 3, wherein said speech recognition system includes a speaker recognition algorithm which is adaptable by a predetermined amount of training by a speaker.
Claim 8
Dependent Claim
13 words
The system of claim 4, wherein said speaker recognition algorithm is speaker independent.
Claim 9
Dependent Claim
18 words
The system of claim 3, wherein said speech recognition system uses a Hidden Markov model speech recognition algorithm.
Claim 10
Independent Claim
121 words
A system for improved acquisition of speech, comprising of: a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto; a beamformer, connected to said linearly arrayed sensors, to cancel a preselected noise portion of said signals thereby producing a processed signal, said beamformer including an adaptive noise canceler and an adder which produces said processed signal; and a speech application system, connected to receive said processed signal from said beamformer, for receiving and responding to said processed signal, wherein said adaptive noise canceler comprises a blocking matrix, an adaptive filter and an adder, and wherein said adaptive filter further comprises enable/disable circuitry for selectively adapting said adaptive filter for a predetermined period of time.
Claim 11
Independent Claim
121 words
A system for improved acquisition of speech, comprising of: a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto; a beamformer, connected to said linearly arrayed sensors, to cancel a preselected noise portion of said signals thereby producing a processed signal, said beamformer including an adaptive noise canceler and an adder which produces said processed signal; and a speech application system, connected to receive said processed signal from said beamformer, for receiving and responding to said processed signal, wherein said adaptive noise canceler comprises a blocking matrix, an adaptive filter and an adder, and wherein said adaptive filter further comprises enable/disable circuitry for selectively adapting said adaptive filter for a predetermined period of time.
Claim 12
Independent Claim
98 words
A system for improved acquisition of speech, comprising of: a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto; a beamformer, connected to said linearly arrayed sensors, to cancel a preselected noise portion of said signals thereby producing a processed signal, said beamformer including an adaptive noise canceler and an adder which produces said processed signal; and a speech application system, connected to receive said processed signal from said beamformer, for receiving and responding to said processed signal, wherein said speech application system includes a speech coder and a communications link.
Claim 13
Independent Claim
98 words
A system for improved acquisition of speech, comprising of: a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto; a beamformer, connected to said linearly arrayed sensors, to cancel a preselected noise portion of said signals thereby producing a processed signal, said beamformer including an adaptive noise canceler and an adder which produces said processed signal; and a speech application system, connected to receive said processed signal from said beamformer, for receiving and responding to said processed signal, wherein said speech application system includes a speech coder and a communications link.
Claim 14
Independent Claim
95 words
A system for improved acquisition of speech, comprising of: a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto; a beamformer, connected to said linearly arrayed sensors, to cancel a preselected noise portion of said signals thereby producing a processed signal, said beamformer including an adaptive noise canceler and an adder which produces said processed signal; and a speech application system, connected to receive said processed signal from said beamformer, for receiving and responding to said processed signal, wherein said speech application system is a speech recognition system.
Claim 15
Independent Claim
95 words
A system for improved acquisition of speech, comprising of: a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto; a beamformer, connected to said linearly arrayed sensors, to cancel a preselected noise portion of said signals thereby producing a processed signal, said beamformer including an adaptive noise canceler and an adder which produces said processed signal; and a speech application system, connected to receive said processed signal from said beamformer, for receiving and responding to said processed signal, wherein said speech application system is a speech recognition system.
Claim 16
Dependent Claim
27 words
The system of claim 9, wherein said speech recognition system includes a speaker recognition algorithm which is adaptable by a predetermined amount of training by a speaker.
Claim 17
Dependent Claim
13 words
The system of claim 10, wherein said speaker recognition algorithm is speaker independent.
Claim 18
Dependent Claim
18 words
The system of claim 9, wherein said speech recognition system uses a Hidden Markov Model speech recognition algorithm.
Claim 19
Independent Claim
90 words
A system for improved acquisition of speech, comprising: a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto; a beamformer, connected to said linearly arrayed sensors, to cancel a preselected noise portion of said signals thereby producing a processed signal; and a speech recognition system, connected to receive said processed signal from said beamformer, for receiving and responding to said processed signal, said speech recognition system including a speaker recognition algorithm which is adaptable by a predetermined amount of training by a speaker.
Claim 20
Independent Claim
90 words
A system for improved acquisition of speech, comprising: a plurality of linearly arrayed sensors to detect spoken input and to output signals in response thereto; a beamformer, connected to said linearly arrayed sensors, to cancel a preselected noise portion of said signals thereby producing a processed signal; and a speech recognition system, connected to receive said processed signal from said beamformer, for receiving and responding to said processed signal, said speech recognition system including a speaker recognition algorithm which is adaptable by a predetermined amount of training by a speaker.
Claim 21
Dependent Claim
40 words
They system of claim 13, wherein said system further comprises a highpass filter connected to said beamformer to filter a preselected noise portion of said signals received from said linearly arrayed sensors before transmitting such filtered signals to said beamformer.
Claim 22
Dependent Claim
31 words
The system of claim 13, wherein said beamformer is a generalized sidelobe canceler, comprising a delay and sum beamformer, an adaptive noise canceler and an adder which produces said processed signal.
Claim 23
Dependent Claim
20 words
The system of claim 15, wherein said adaptive noise canceler comprises a blocking matrix, an adaptive filter and an adder.
Claim 24
Dependent Claim
25 words
The system of claim 16, wherein said adaptive filter further comprises enble/disable circuitry for selectively adapting said adaptive filter for a predetermined period of time.
Claim 25
Dependent Claim
18 words
The system of claim 13, wherein said speech recognition system uses a Hidden Markov Model speech recognition algorithm.
Claim 26
Independent Claim
81 words
A method for improved acquisition of speech during hands-free cellular telephony, comprising the steps of: detecting spoken signals, including a speech portion and a noise portion, with linearly arrayed sensors; filtering a preselected portion of said noise portion of said signals by a highpass filter; processing said filtered signals with a beamformer including an adaptive filter and enable/disable circuitry for selectively adapting said adaptive filter for a predetermined period of time; recognize said speech portion; and responding to said processed signal.
Claim 27
Independent Claim
81 words
A method for improved acquisition of speech during hands-free cellular telephony, comprising the steps of: detecting spoken signals, including a speech portion and a noise portion, with linearly arrayed sensors; filtering a preselected portion of said noise portion of said signals by a highpass filter; processing said filtered signals with a beamformer including an adaptive filter and enable/disable circuitry for selectively adapting said adaptive filter for a predetermined period of time; recognize said speech portion; and responding to said processed signal.
Claim 28
Dependent Claim
26 words
The method of claim 19, wherein said step of responding to said processed signal includes the step of dialing a number associated with said speech portion.
Claim 29
Dependent Claim
33 words
The method of claim 19, wherein said step of recognizing said speech portion further includes the step of employing a Hidden Markov Model speech recognition algorithm to aid in recognizing such speech portion.
Claim 30
Dependent Claim
40 words
The method of claim 19, wherein the method further comprises the step of adapting an adaptive filter for a predetermined period of time and the step of stopping said adaptation of said adaptive filter after said step of detecting step.
References Cited (Backward Citations)
US3781782A
Cited
US4893289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-03 | 1998-04-04 | 1998-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-03 | 2002-04-04 | 2002-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-03 | 2006-04-04 | 2006-10-04 | $7700.00 | Window Closed / Lapsed |