GB862132A - Frequency discrimination system of voice formant - Google Patents

Frequency discrimination system of voice formant

Info

Publication number
GB862132A
GB862132A GB42575/59A GB4257559A GB862132A GB 862132 A GB862132 A GB 862132A GB 42575/59 A GB42575/59 A GB 42575/59A GB 4257559 A GB4257559 A GB 4257559A GB 862132 A GB862132 A GB 862132A
Authority
GB
United Kingdom
Prior art keywords
frequency
formant
output
dec
voltage
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
GB42575/59A
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.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Publication of GB862132A publication Critical patent/GB862132A/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

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)
  • Electrophonic Musical Instruments (AREA)

Abstract

862,132. Frequency discriminators. NIPPON ELECTRIC CO. Ltd. Dec. 15, 1959 [Dec. 17, 1958], No. 42575/59. Class 40(5) A frequency discriminator for providing a voltage characteristic of the amplitude and frequency shift of a voice formant comprises a variable frequency oscillator 7 the output of which is modulated by the formant signal, a single sideband load pass filter 2, the frequencies of the selected sideband then being passed through networks 3, 4 having reversed attenuation/frequency characteristics with respect to one another, the two outputs from 3, 4 being compared in a comparator 5 which will give an output if the formant is shifted in frequency, said output voltage later giving an indication of said frequency shift and being supplied to a controller 6 to feed back a voltage to the oscillator 7 so to vary the frequency thereof that the centre frequency of the selected sideband is maintained at the centre of the passband of filter 2.
GB42575/59A 1958-12-17 1959-12-15 Frequency discrimination system of voice formant Expired GB862132A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP862132X 1958-12-17

Publications (1)

Publication Number Publication Date
GB862132A true GB862132A (en) 1961-03-01

Family

ID=13880485

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42575/59A Expired GB862132A (en) 1958-12-17 1959-12-15 Frequency discrimination system of voice formant

Country Status (1)

Country Link
GB (1) GB862132A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2229109A1 (en) * 1973-05-08 1974-12-06 Westinghouse Electric Corp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2229109A1 (en) * 1973-05-08 1974-12-06 Westinghouse Electric Corp

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