Patent US3852535A successfully refreshed from Google Patents.
US3852535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pitch detection processor
Assignee: ZURCHER JEAN FREDERIC
•
Filing: 1973-11-16
•
Granted: 1974-12-03
•
Expires: 1993-11-16
Abstract
Abstract Processor for the detection of the pitch of a speech wave for use in connection with a vocoder system. It comprises means for detecting the major peaks of the speech wave, means for converting said major peaks into marker pulses defining therebetween pitch periods and a processor unit for treating the marker pulses. The program of treatment is the following: (i) omission of a marker pulse separated from the preceding marker pulse by an interval shorter than the preceding period by more than a tolerance amount with prohibition to omit two consecutive marker pulses; (ii) selection of the preceding period if the actual period is larger or shorter than the said preceding period by more than a tolerance amount with prohibition to select two times in succession the preceding period; (iii) division by two of the value of the pitch if it is larger than a lower limit, say 15ms or 8ms for respectively a male and a female voice.
Inventors
- 👤 J Zurcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:06
CPC Classifications
G; G10; G10L; G10L25/00; G10L25/90
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
178 words
A processor for the detection of the pitch of a speech wave for use in connection with a vocoder system comprising means for detecting the major peaks of said speech wave, means for converting said major peaks into a train of marker pulses, each pair of consecutive marker pulses of said train defining a pitch period, means for cancelling in said train each marker pulse separated from the preceding marker pulse by an interval shorter than the preceding pitch period by more than a tolerance amount, means for prohibiting the cancellation of more than a first given number of consecutive marker pulses, means for storing the value of each pitch period defined by two consecutive non-cancelled marker pulses and not differing from the preceding pitch period by more than a tolerance amount, means for substituting the preceding pitch period for each pitch period differing from said preceding pitch period by more than a tolerance amount and means for prohibiting the substitution for more than a second given number of consecutive pitch periods, of the respective preceding pitch periods.
Claim 2
Dependent Claim
178 words
A processor for the detection of the pitch of a speech wave for use in connection with a vocoder system comprising means for detecting the major peaks of said speech wave, means for converting said major peaks into a train of marker pulses, each pair of consecutive marker pulses of said train defining a pitch period, means for cancelling in said train each marker pulse separated from the preceding marker pulse by an interval shorter than the preceding pitch period by more than a tolerance amount, means for prohibiting the cancellation of more than a first given number of consecutive marker pulses, means for storing the value of each pitch period defined by two consecutive non-cancelled marker pulses and not differing from the preceding pitch period by more than a tolerance amount, means for substituting the preceding pitch period for each pitch period differing from said preceding pitch period by more than a tolerance amount and means for prohibiting the substitution for more than a second given number of consecutive pitch periods, of the respective preceding pitch periods.
Claim 3
Dependent Claim
30 words
A processor for the detection of the pitch of a speech wave as set forth in claim 1, in which said first and second numbers are both equal to 2.
Claim 4
Dependent Claim
199 words
A processor for the detection of the pitch of a speech wave for use in connection with a vocoder system comprising means for detecting the major peaks of said speech wave, means for converting said major peaks into a train of marker pulses, each pair of consecutive marker pulses of said train defining a pitch period, means for cancelling in said train each marker pulse separated from the preceding marker pulse by an interval shorter than the preceding pitch period by more than a tolerance amount, means for prohibiting the cancellation of more than a first given number of consecutive marker pulses, means for storing the value of each pitch period defined by two consecutive non-cancelled marker pulses and not differing from the preceding pitch period by more than a tolerance amount, means for substituting the preceding pitch period for each pitch period differing from said preceding pitch period by more than a tolerance amount, means for prohibiting the substitution for more than a second given number of consecutive pitch periods, of the respective preceding pitch periods and means for dividing by two the value of those of the recorded pitch periods that are larger than a predetermined value.
Claim 5
Dependent Claim
199 words
A processor for the detection of the pitch of a speech wave for use in connection with a vocoder system comprising means for detecting the major peaks of said speech wave, means for converting said major peaks into a train of marker pulses, each pair of consecutive marker pulses of said train defining a pitch period, means for cancelling in said train each marker pulse separated from the preceding marker pulse by an interval shorter than the preceding pitch period by more than a tolerance amount, means for prohibiting the cancellation of more than a first given number of consecutive marker pulses, means for storing the value of each pitch period defined by two consecutive non-cancelled marker pulses and not differing from the preceding pitch period by more than a tolerance amount, means for substituting the preceding pitch period for each pitch period differing from said preceding pitch period by more than a tolerance amount, means for prohibiting the substitution for more than a second given number of consecutive pitch periods, of the respective preceding pitch periods and means for dividing by two the value of those of the recorded pitch periods that are larger than a predetermined value.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |