US4825384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speech recognizer
Assignee: Canon Inc
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Filing: 1987-05-11
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Granted: 1989-04-25
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Expires: 2007-05-11
Abstract
Abstract A voice subtractor/recognizer which prevents interference from a voice output device by inputting via one input device both a sound to be recognized and any sound being output by the output device, and inputting at a second input device a signal representing the output of the output device. The latter signal is analyzed, and the result is used to inversely filter a signal representing the sounds input via the first-mentioned input device.
Inventors
- 👤 Atsushi Sakurai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:06
CPC Classifications
G; G10; G10L; G10L15/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
181 words
A system comprising a voice recognizer and an apparatus controlled by said voice recognizer comprising: signal generation means for generating a voice signal; conversion means for converting an output of said signal generating means to an output sound; the voice recognizer comprising: (a) acoustic input means for receiving output sound from said conversion means and a voice containing voice information; (b) second input means connected to said signal generation means, for receiving said voice signal; (c) means connected to said acoustic input means and to said second input means for filtering said output sound from the voice and output sound received by said acoustic input means, said filtering means performing said filtering in accordance with said voice signal received by said second input means, said filtering means thereby producing a filtered signal containing the voice information target via said acoustic input means; (d) means connected to said filtering means for recognizing the voice information received through said filtering means, to produce a result of voice recognition; and (e) control means provided in said apparatus responsive to said result of voice recognition.
Claim 2
Independent Claim
181 words
A system comprising a voice recognizer and an apparatus controlled by said voice recognizer comprising: signal generation means for generating a voice signal; conversion means for converting an output of said signal generating means to an output sound; the voice recognizer comprising: (a) acoustic input means for receiving output sound from said conversion means and a voice containing voice information; (b) second input means connected to said signal generation means, for receiving said voice signal; (c) means connected to said acoustic input means and to said second input means for filtering said output sound from the voice and output sound received by said acoustic input means, said filtering means performing said filtering in accordance with said voice signal received by said second input means, said filtering means thereby producing a filtered signal containing the voice information target via said acoustic input means; (d) means connected to said filtering means for recognizing the voice information received through said filtering means, to produce a result of voice recognition; and (e) control means provided in said apparatus responsive to said result of voice recognition.
Claim 3
Dependent Claim
14 words
A voice recognizer according to claim 1, wherein said conversion means comprises a loudspeaker.
Claim 4
Dependent Claim
20 words
A voice recognizer according to claim 1, wherein said second input means comprises delay means for delaying said voice signal.
Claim 5
Dependent Claim
15 words
A voice recognizer according to claim 1, wherein said filtering means comprises an inverse filter.
Claim 6
Dependent Claim
15 words
A voice recognizer according to claim 1, wherein said acoustic input means includes a microphone.
Claim 7
Dependent Claim
179 words
A control equipment using a voice recognizer comprising: voice generation means for generating an analog synthesized voice signal; output means for outputting said synthesized voice signal as a sound; acoustic input means for entering sound including a voice to be recognized; first conversion means connected to said acoustic input means for analog-digital conversion of said voice entered by said acoustic input means to produce a digital sound signal; second conversion means connected to said voice generation means, for analog-digital conversion of said analog synthesized voice signal; delay means for delaying the output of said second conversion means; filter means connected to said delay means for receiving said synthesized voice signal from said delay means and for filtering said synthesized voice signal from said digital sound signal entered via first conversion means, said digital sound signal including both said voice to be recognized and sound output by said output means; means connected to said filter means for recognizing said filter synthesized voice, and producing a result of voice recognition; and a device responsive to said result of the voice recognition.
Claim 8
Dependent Claim
179 words
A control equipment using a voice recognizer comprising: voice generation means for generating an analog synthesized voice signal; output means for outputting said synthesized voice signal as a sound; acoustic input means for entering sound including a voice to be recognized; first conversion means connected to said acoustic input means for analog-digital conversion of said voice entered by said acoustic input means to produce a digital sound signal; second conversion means connected to said voice generation means, for analog-digital conversion of said analog synthesized voice signal; delay means for delaying the output of said second conversion means; filter means connected to said delay means for receiving said synthesized voice signal from said delay means and for filtering said synthesized voice signal from said digital sound signal entered via first conversion means, said digital sound signal including both said voice to be recognized and sound output by said output means; means connected to said filter means for recognizing said filter synthesized voice, and producing a result of voice recognition; and a device responsive to said result of the voice recognition.
Claim 9
Dependent Claim
13 words
Control equipment according to claim 6, wherein said output means comprises a loudspeaker.
Claim 10
Dependent Claim
14 words
Control equipment according to claim 6, wherein said acoustic input means comprises a microphone.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |