FR1471628A - Methods and devices for performing filtering controlled by excitation of channel voltages in voice coding systems - Google Patents

Methods and devices for performing filtering controlled by excitation of channel voltages in voice coding systems

Info

Publication number
FR1471628A
FR1471628A FR53804A FR53804A FR1471628A FR 1471628 A FR1471628 A FR 1471628A FR 53804 A FR53804 A FR 53804A FR 53804 A FR53804 A FR 53804A FR 1471628 A FR1471628 A FR 1471628A
Authority
FR
France
Prior art keywords
excitation
methods
devices
voice coding
coding systems
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
FR53804A
Other languages
French (fr)
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of FR1471628A publication Critical patent/FR1471628A/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
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Meter Arrangements (AREA)
  • Machine Translation (AREA)
FR53804A 1965-03-25 1966-03-17 Methods and devices for performing filtering controlled by excitation of channel voltages in voice coding systems Expired FR1471628A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT275665A AT251656B (en) 1965-03-25 1965-03-25 Processes and arrangements for improving the speech quality in vocoder systems

Publications (1)

Publication Number Publication Date
FR1471628A true FR1471628A (en) 1967-03-03

Family

ID=3539787

Family Applications (1)

Application Number Title Priority Date Filing Date
FR53804A Expired FR1471628A (en) 1965-03-25 1966-03-17 Methods and devices for performing filtering controlled by excitation of channel voltages in voice coding systems

Country Status (10)

Country Link
US (1) US3431355A (en)
AT (1) AT251656B (en)
BE (1) BE677136A (en)
CH (1) CH443413A (en)
DE (1) DE1276740B (en)
ES (1) ES324621A1 (en)
FR (1) FR1471628A (en)
GB (1) GB1073203A (en)
NL (1) NL146672B (en)
SE (1) SE323721B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL84948A0 (en) * 1987-12-25 1988-06-30 D S P Group Israel Ltd Noise reduction system
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
US5768473A (en) * 1995-01-30 1998-06-16 Noise Cancellation Technologies, Inc. Adaptive speech filter
US6108610A (en) * 1998-10-13 2000-08-22 Noise Cancellation Technologies, Inc. Method and system for updating noise estimates during pauses in an information signal

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3012098A (en) * 1941-11-22 1961-12-05 Bell Telephone Labor Inc Telephone privacy
US2810787A (en) * 1952-05-22 1957-10-22 Itt Compressed frequency communication system
US3102928A (en) * 1960-12-23 1963-09-03 Bell Telephone Labor Inc Vocoder excitation generator
US3261916A (en) * 1962-11-16 1966-07-19 Ibm Adjustable recognition system

Also Published As

Publication number Publication date
SE323721B (en) 1970-05-11
NL146672B (en) 1975-07-15
BE677136A (en) 1966-07-18
CH443413A (en) 1967-09-15
ES324621A1 (en) 1967-02-01
DE1276740B (en) 1968-09-05
AT251656B (en) 1967-01-10
US3431355A (en) 1969-03-04
GB1073203A (en) 1967-06-21
NL6602974A (en) 1966-09-26

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