US3833767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speech compression system
Assignee: Individual
•
Filing: 1972-12-08
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Granted: 1974-09-03
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Expires: 1992-12-08
Abstract
Abstract The generation of a set of a certain kind of coefficients related to the speech signal is obtained by simultaneously operating upon a sample of the speech signal with a set of orthogonal random functions derived from a white noise source and the white noise itself. These coefficients are sequentially AM or FM modulated for transmission by any suitable means. The transmitted signal is received and demodulated and sequentially processed through the system of this invention to recover the coefficients which are related to and can be used with a second source of white noise to reconstruct the original speech signal. The speech compression is accomplished by utilizing the coefficients as the information carrier source and later at the receiving ends to reconstruct the speech signal from these coefficients to obtain the vocal intelligence.
Inventors
- 👤 A Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:29
CPC Classifications
G; G10; G10L; G10L19/00; G10L19/02; G10L19/0212; H; H04; H04B; H04B1/00; H04B1/66
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
98 words
A speech compression system including: first means to receive a speech signal and to generate a set of speech extraction coefficients from said speech signal; second means connected to said first means for transmitting said set of coefficients, said second means having an output; third means for receiving the output of said second means; fourth means connected to said third means for reconstructing a speech signal corresponding to the speech signal received by said first means; whereby the bandwidth required to transmit each said speech extraction coefficient is narrower than the bandwidth required to transmit said speech signal.
Claim 2
Dependent Claim
98 words
A speech compression system including: first means to receive a speech signal and to generate a set of speech extraction coefficients from said speech signal; second means connected to said first means for transmitting said set of coefficients, said second means having an output; third means for receiving the output of said second means; fourth means connected to said third means for reconstructing a speech signal corresponding to the speech signal received by said first means; whereby the bandwidth required to transmit each said speech extraction coefficient is narrower than the bandwidth required to transmit said speech signal.
Claim 3
Dependent Claim
14 words
The system of claim 1 in which the first means includes an orthogonal filter.
Claim 4
Dependent Claim
18 words
A system as claimed in claim 2 in which said coefficients are very slowly varying functions of time.
Claim 5
Dependent Claim
20 words
A system as claimed in claim 3 in which the time function of the coefficients are given by the equations
Claim 6
Dependent Claim
36 words
A system as claimed in claim 2 in which said third means includes an orthogonal filter, said orthogonal filter of said third means having the same transfer characteristic as said orthogonal filter of said first means.
Claim 7
Dependent Claim
25 words
A system as claimed in claim 1 in which said first means includes a white noise source of spectral power density N2 watts per cycle.
Claim 8
Dependent Claim
27 words
A system as claimed in claim 6 in which said third means includes a source of white noise of a spectral power density 1/N2 watts per cycle.
Claim 9
Independent Claim
55 words
A method of communication and speech compression comprising the steps of: producing a set of speech extraction coefficients from a speech signal such that each said coefficient has narrower transmission bandwidth requirements than said speech signal; transmitting said speech extraction coefficients; receiving said speech extraction coefficients; reconstructing said speech signal from said speech extraction coefficients.
Claim 10
Independent Claim
55 words
A method of communication and speech compression comprising the steps of: producing a set of speech extraction coefficients from a speech signal such that each said coefficient has narrower transmission bandwidth requirements than said speech signal; transmitting said speech extraction coefficients; receiving said speech extraction coefficients; reconstructing said speech signal from said speech extraction coefficients.
Claim 11
Dependent Claim
22 words
The method of claim 8 wherein the step of transmitting said speech extraction coefficients includes the step of sequentially processing said coefficients.
Claim 12
Dependent Claim
20 words
The method of claim 9 wherein the step of receiving said coefficients includes the step of sequentially deprocessing said coefficients.
References Cited (Backward Citations)
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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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |