FR2544901B1 - CHANNEL VOCODER PROVIDED WITH MEANS FOR COMPENSATING FOR PARASITIC MODULATIONS OF THE SYNTHETIC SPEECH SIGNAL - Google Patents

CHANNEL VOCODER PROVIDED WITH MEANS FOR COMPENSATING FOR PARASITIC MODULATIONS OF THE SYNTHETIC SPEECH SIGNAL

Info

Publication number
FR2544901B1
FR2544901B1 FR8306471A FR8306471A FR2544901B1 FR 2544901 B1 FR2544901 B1 FR 2544901B1 FR 8306471 A FR8306471 A FR 8306471A FR 8306471 A FR8306471 A FR 8306471A FR 2544901 B1 FR2544901 B1 FR 2544901B1
Authority
FR
France
Prior art keywords
signal
synthesis
input
subtractor
channel
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
FR8306471A
Other languages
French (fr)
Other versions
FR2544901A1 (en
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.)
ZURCHER JEAN FREDERIC
Original Assignee
ZURCHER JEAN FREDERIC
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 ZURCHER JEAN FREDERIC filed Critical ZURCHER JEAN FREDERIC
Priority to FR8306471A priority Critical patent/FR2544901B1/en
Priority to DE8484400744T priority patent/DE3467650D1/en
Priority to EP19840400744 priority patent/EP0124411B1/en
Publication of FR2544901A1 publication Critical patent/FR2544901A1/en
Application granted granted Critical
Publication of FR2544901B1 publication Critical patent/FR2544901B1/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)
  • Amplitude Modulation (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

1. Synthesis subassembly of a channel vocoder including a means (36) of reception and extraction of the data in a frame, a means (38) of producing an excitation signal, the said synthesis subassembly including : - _n synthesis channels (45) numbered from 1 to _n, each including a bandpass filter (48) and a means of energy measurement (50, 52) for measuring the energy contained in the said band, the said synthesis channels receiving on input the excitation signal coming from the means (38) of producing the excitation signal, - at least one subtractor (62) receiving on a first input the energy signal delivered by a synthesis channel and on a second input the signal coming from the means of reception (36) and representing the energy signal delivered by the corresponding analysis channel and delivering a signal expressing the signed difference between the two signals applied on input, - at least one modulator (46) associated with the subtractor, of which the input which controls the gain receives the signal delivered by the subtractor, the said synthesis subassembly being characterized in that the synthesis channels (45), the subtractor or subtractors (62) and the associated modulator or modulators (46) are arranged in cascade in this order and constitute an open loop circuit, the synthesis subassembly being arranged such that it includes at least one means of signal processing (63) including a subtractor (62) and its associated modulator (46), the said means of processing (63) including a quantification and coding circuit (56) which receives on input the energy signal from a synthesis channel (45) in order to deliver to one of the inputs of the subtractor a quantified and coded energy signal, the other input of the subtractor receiving the energy signal coming from the means of reception and delivered by the corresponding analysis channel, the modulator receiving on its signal to be modulated input the output signal from the band pass filter of the synthesis channel.
FR8306471A 1983-04-20 1983-04-20 CHANNEL VOCODER PROVIDED WITH MEANS FOR COMPENSATING FOR PARASITIC MODULATIONS OF THE SYNTHETIC SPEECH SIGNAL Expired FR2544901B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR8306471A FR2544901B1 (en) 1983-04-20 1983-04-20 CHANNEL VOCODER PROVIDED WITH MEANS FOR COMPENSATING FOR PARASITIC MODULATIONS OF THE SYNTHETIC SPEECH SIGNAL
DE8484400744T DE3467650D1 (en) 1983-04-20 1984-04-13 Channel vocoder comprising means for suppressing parasitic modulation of the synthesized speech signal
EP19840400744 EP0124411B1 (en) 1983-04-20 1984-04-13 Channel vocoder comprising means for suppressing parasitic modulation of the synthesized speech signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8306471A FR2544901B1 (en) 1983-04-20 1983-04-20 CHANNEL VOCODER PROVIDED WITH MEANS FOR COMPENSATING FOR PARASITIC MODULATIONS OF THE SYNTHETIC SPEECH SIGNAL

Publications (2)

Publication Number Publication Date
FR2544901A1 FR2544901A1 (en) 1984-10-26
FR2544901B1 true FR2544901B1 (en) 1986-02-21

Family

ID=9288045

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8306471A Expired FR2544901B1 (en) 1983-04-20 1983-04-20 CHANNEL VOCODER PROVIDED WITH MEANS FOR COMPENSATING FOR PARASITIC MODULATIONS OF THE SYNTHETIC SPEECH SIGNAL

Country Status (3)

Country Link
EP (1) EP0124411B1 (en)
DE (1) DE3467650D1 (en)
FR (1) FR2544901B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4325354C1 (en) * 1993-07-28 1994-08-25 Siemens Ag Method and arrangement for outputting digital speech signals
US5715365A (en) * 1994-04-04 1998-02-03 Digital Voice Systems, Inc. Estimation of excitation parameters

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2672512A (en) * 1949-02-02 1954-03-16 Bell Telephone Labor Inc System for analyzing and synthesizing speech
US2996579A (en) * 1960-01-13 1961-08-15 Gen Dynamics Corp Feedback vocoder
US3252105A (en) * 1962-06-07 1966-05-17 Honeywell Inc Rate limiting apparatus including active elements
US3346695A (en) * 1963-05-07 1967-10-10 Gunnar Fant Vocoder system
AT251655B (en) * 1964-10-01 1967-01-10 Ibm Oesterreich Internationale Channel vocoder
AT276495B (en) * 1967-08-03 1969-11-25 Ibm Oesterreich Internationale Method for multiplex speech synthesis
GB2002611B (en) * 1977-08-05 1982-03-17 Brown Ltd S Electric circuit device and pendulum unit incorporating such devices

Also Published As

Publication number Publication date
DE3467650D1 (en) 1987-12-23
FR2544901A1 (en) 1984-10-26
EP0124411B1 (en) 1987-11-19
EP0124411A1 (en) 1984-11-07

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Legal Events

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TP Transmission of property
TP Transmission of property
ST Notification of lapse