GB796676A - Improvements in or relating to circuits for the analysis and synthesis of speech currents - Google Patents

Improvements in or relating to circuits for the analysis and synthesis of speech currents

Info

Publication number
GB796676A
GB796676A GB28633/55A GB2863355A GB796676A GB 796676 A GB796676 A GB 796676A GB 28633/55 A GB28633/55 A GB 28633/55A GB 2863355 A GB2863355 A GB 2863355A GB 796676 A GB796676 A GB 796676A
Authority
GB
United Kingdom
Prior art keywords
voltage
voltages
proportional
current
oct
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB28633/55A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB796676A publication Critical patent/GB796676A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/90—Pitch determination of speech signals
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Toys (AREA)

Abstract

796,676. Electric analogue calculating systems. WESTERN ELECTRIC CO., Inc. Oct. 7, 1955 [Oct. 20, 1954], No. 28633/55. Class 37. [Also in Group XXXIX] In a circuit for obtaining a voltage V8 proportional to the quotient V1/V2, the voltages V1, V2 are applied via resistors R respectively to diodes 56, 57 which have exponential current/ voltage characteristics so that the voltages V3 and V4 at the grids of valves 51, 52 are proportional to the logarithms of V1, V2, respectively. By the cathode follower action these voltages are repeated as V5, V6 on the cathodes of the valves, and this voltage difference is applied to the exponential diode 58 to produce a current i7 proportional to the ratio V1/V2. The output is derived as a voltage V8 developed over a small anode resistor R1. The Specification contains detailed mathematical analysis of the circuit which is used in a speech current analyser (see Group XXXIX).
GB28633/55A 1954-10-20 1955-10-07 Improvements in or relating to circuits for the analysis and synthesis of speech currents Expired GB796676A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US463467A US2908761A (en) 1954-10-20 1954-10-20 Voice pitch determination

Publications (1)

Publication Number Publication Date
GB796676A true GB796676A (en) 1958-06-18

Family

ID=23840192

Family Applications (2)

Application Number Title Priority Date Filing Date
GB28633/55A Expired GB796676A (en) 1954-10-20 1955-10-07 Improvements in or relating to circuits for the analysis and synthesis of speech currents
GB28214/57A Expired GB796677A (en) 1954-10-20 1955-10-07 Improvements in or relating to circuits for the analysis of speech currents

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB28214/57A Expired GB796677A (en) 1954-10-20 1955-10-07 Improvements in or relating to circuits for the analysis of speech currents

Country Status (2)

Country Link
US (1) US2908761A (en)
GB (2) GB796676A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2233872A1 (en) * 1971-07-09 1973-01-18 Western Electric Co SIGNAL ANALYZER
EP0123349A1 (en) * 1983-04-20 1984-10-31 Philips Electronics Uk Limited Apparatus for distinguishing between speech and certain other signals

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3036268A (en) * 1958-01-10 1962-05-22 Caldwell P Smith Detection of relative distribution patterns
US3078345A (en) * 1958-07-31 1963-02-19 Melpar Inc Speech compression systems
US3094692A (en) * 1958-10-01 1963-06-18 Electro Mechanical Res Inc Statistical telemetering
US3090837A (en) * 1959-04-29 1963-05-21 Ibm Speech bandwidth compression system
US3083338A (en) * 1959-11-10 1963-03-26 Crosby Lab Inc Speech communication system
US3102236A (en) * 1960-05-05 1963-08-27 Collins Radio Co Squelch circuit controlled by demodulated voice signal
US3109070A (en) * 1960-08-09 1963-10-29 Bell Telephone Labor Inc Pitch synchronous autocorrelation vocoder
US3069507A (en) * 1960-08-09 1962-12-18 Bell Telephone Labor Inc Autocorrelation vocoder
US3036775A (en) * 1960-08-11 1962-05-29 Ibm Function generators
US3102928A (en) * 1960-12-23 1963-09-03 Bell Telephone Labor Inc Vocoder excitation generator
US3269921A (en) * 1961-07-03 1966-08-30 Phillips Petroleum Co Computing and controlling the enthalpy of a process stream
US3211832A (en) * 1961-08-28 1965-10-12 Rca Corp Processing apparatus utilizing simulated neurons
US3359409A (en) * 1963-04-09 1967-12-19 Hugh L Dryden Correlation function apparatus
US3405237A (en) * 1965-06-01 1968-10-08 Bell Telephone Labor Inc Apparatus for determining the periodicity and aperiodicity of a complex wave
US3321582A (en) * 1965-12-09 1967-05-23 Bell Telephone Labor Inc Wave analyzer
US3947638A (en) * 1975-02-18 1976-03-30 The United States Of America As Represented By The Secretary Of The Army Pitch analyzer using log-tapped delay line
US4004096A (en) * 1975-02-18 1977-01-18 The United States Of America As Represented By The Secretary Of The Army Process for extracting pitch information
US4015088A (en) * 1975-10-31 1977-03-29 Bell Telephone Laboratories, Incorporated Real-time speech analyzer
NL7908213A (en) * 1979-11-09 1981-06-01 Philips Nv SPEECH SYNTHESIS DEVICE WITH AT LEAST TWO DISTORTION CHAINS.
EP0076233B1 (en) * 1981-09-24 1985-09-11 GRETAG Aktiengesellschaft Method and apparatus for redundancy-reducing digital speech processing
US4591673A (en) * 1982-05-10 1986-05-27 Lee Lin Shan Frequency or time domain speech scrambling technique and system which does not require any frame synchronization
NL8400552A (en) * 1984-02-22 1985-09-16 Philips Nv SYSTEM FOR ANALYZING HUMAN SPEECH.
CA1229681A (en) * 1984-03-06 1987-11-24 Kazunori Ozawa Method and apparatus for speech-band signal coding
US5471527A (en) * 1993-12-02 1995-11-28 Dsc Communications Corporation Voice enhancement system and method
US7124075B2 (en) * 2001-10-26 2006-10-17 Dmitry Edward Terez Methods and apparatus for pitch determination

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151091A (en) * 1935-10-30 1939-03-21 Bell Telephone Labor Inc Signal transmission
US2243526A (en) * 1940-03-16 1941-05-27 Bell Telephone Labor Inc Production of artificial speech
US2401405A (en) * 1944-05-20 1946-06-04 Rca Corp Method of and means for synchronizing wave generators
US2508620A (en) * 1944-11-09 1950-05-23 Rca Corp Multiplex pulse communication system
NL77653C (en) * 1944-12-23
US2705742A (en) * 1951-09-15 1955-04-05 Bell Telephone Labor Inc High speed continuous spectrum analysis

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2233872A1 (en) * 1971-07-09 1973-01-18 Western Electric Co SIGNAL ANALYZER
EP0123349A1 (en) * 1983-04-20 1984-10-31 Philips Electronics Uk Limited Apparatus for distinguishing between speech and certain other signals

Also Published As

Publication number Publication date
US2908761A (en) 1959-10-13
GB796677A (en) 1958-06-18

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