SE321958B - - Google Patents

Info

Publication number
SE321958B
SE321958B SE13920/66A SE1392066A SE321958B SE 321958 B SE321958 B SE 321958B SE 13920/66 A SE13920/66 A SE 13920/66A SE 1392066 A SE1392066 A SE 1392066A SE 321958 B SE321958 B SE 321958B
Authority
SE
Sweden
Prior art keywords
multivibrator
noise
automatic gain
gain control
ring
Prior art date
Application number
SE13920/66A
Inventor
G Clapper
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of SE321958B publication Critical patent/SE321958B/xx

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
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • 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
    • G10L15/00—Speech recognition
    • 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
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/15—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being formant information

Landscapes

  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Noise Elimination (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Electrically Operated Instructional Devices (AREA)
  • Prostheses (AREA)
  • Amplifiers (AREA)

Abstract

1,160,593. Speech recognition. INTERNATIONAL BUSINESS MACHINES CORP. 15 Sept., 1966 [13 Oct., 1965], No. 41169/66. Heading G4R. [Also in Divisions H3 and H4] In a speech analysis system, gating of coded signals (representing speech characteristics) into a store is inhibited on detection of noise. A speech waveform from a microphone 1 is amplified at 3 and split into frequency bands at 60 to feed formant location means 129 and automatic gain control 66. The latter produces a signal in response to the largest of the frequency band amplitudes to control the gain of amplifier 3, feed noise clamp generator 90 and start multivibrator 160. The multivibrator 160 then drives a ring 199 to read the outputs of the formant location means 129 into a storage matrix 150. The multivibrator 160 is kept operating after the start signal from the automatic gain control 66 disappears by a signal on line 201 from ring 199. The noise clamp generator 90 differentiates the input from the automatic gain control 66 to detect noise. While noise is present, generator 90 inhibits multivibrator 160. A potentiometer 179 allows the frequency and width of the pulses from the multivibrator 160 to be controlled to compensate for differences between different speakers. The stages of the ring 199 have indicator lamps e.g. 243, as has the automatic gain control 66 at 73.
SE13920/66A 1965-10-13 1966-10-13 SE321958B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US495427A US3418429A (en) 1965-10-13 1965-10-13 Speech analysis system

Publications (1)

Publication Number Publication Date
SE321958B true SE321958B (en) 1970-03-23

Family

ID=23968609

Family Applications (1)

Application Number Title Priority Date Filing Date
SE13920/66A SE321958B (en) 1965-10-13 1966-10-13

Country Status (8)

Country Link
US (1) US3418429A (en)
BE (1) BE687178A (en)
CH (1) CH452913A (en)
ES (1) ES331289A1 (en)
FR (1) FR1494395A (en)
GB (1) GB1160593A (en)
NL (1) NL148731B (en)
SE (1) SE321958B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2291259A1 (en) * 1974-11-12 1976-06-11 Raffinage Cie Francaise Aq suspensions of hard asphalt - for precoating aggregates, stabilised with anionic emulsifier
GB2196460B (en) * 1986-10-03 1991-05-15 Ricoh Kk Methods for comparing an input voice pattern with a registered voice pattern and voice recognition systems
US5231670A (en) * 1987-06-01 1993-07-27 Kurzweil Applied Intelligence, Inc. Voice controlled system and method for generating text from a voice controlled input
DE69317802T2 (en) * 1992-01-21 1998-10-22 Koninkl Philips Electronics Nv Method and device for sound enhancement using encapsulation of multiband pass filtered signals in comb filters

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126449A (en) * 1964-03-24 Shirman
US3109066A (en) * 1959-12-15 1963-10-29 Bell Telephone Labor Inc Sound control system
US3261916A (en) * 1962-11-16 1966-07-19 Ibm Adjustable recognition system

Also Published As

Publication number Publication date
US3418429A (en) 1968-12-24
DE1547030B2 (en) 1976-03-04
NL6614325A (en) 1967-04-14
CH452913A (en) 1968-03-15
NL148731B (en) 1976-02-16
BE687178A (en) 1967-03-01
FR1494395A (en) 1967-09-08
ES331289A1 (en) 1967-07-01
DE1547030A1 (en) 1969-11-20
GB1160593A (en) 1969-08-06

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