EP1164577A3 - Method and apparatus for reproducing speech signals - Google Patents

Method and apparatus for reproducing speech signals Download PDF

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Publication number
EP1164577A3
EP1164577A3 EP01121724A EP01121724A EP1164577A3 EP 1164577 A3 EP1164577 A3 EP 1164577A3 EP 01121724 A EP01121724 A EP 01121724A EP 01121724 A EP01121724 A EP 01121724A EP 1164577 A3 EP1164577 A3 EP 1164577A3
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EP
European Patent Office
Prior art keywords
speech
unvoiced
voiced
unit
encoded parameters
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.)
Withdrawn
Application number
EP01121724A
Other languages
German (de)
French (fr)
Other versions
EP1164577A2 (en
Inventor
Masayuki Nishiguchi
Kazuyuki Iijima
Jun Matsumoto
Shiro Omori
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority claimed from EP96307741A external-priority patent/EP0770987B1/en
Publication of EP1164577A2 publication Critical patent/EP1164577A2/en
Publication of EP1164577A3 publication Critical patent/EP1164577A3/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/04—Time compression or expansion

Abstract

A method for reproducing speech signals at a controlled speed whereby rate conversion of the time axis may be facilitated, and can be realized by a simplified structure based on the encoded speech data without changing the phoneme. With the speech reproducing method, an encoding unit 2 discriminates whether an input speech signal is voiced or unvoiced. Based on the results of discrimination, the encoding unit 2 performs sinusoidal synthesis and encoding for a signal portion found to be voiced, while performing vector quantization by closed-loop search for an optimum vector for a portion found to be unvoiced using an analysis-by-synthesis method, in order to find encoded parameters. The decoding unit 4 compands the time axis of the encoded parameters obtained every pre-set frames at a period modification unit 3 for modifying the output period of the parameters for creating modified encoded parameters associated with different time points corresponding to the pre-set frames. A speech synthesis unit 6 synthesizes the voiced speech portion and the unvoiced speech portion based on the modified encoded parameters.
EP01121724A 1995-10-26 1996-10-25 Method and apparatus for reproducing speech signals Withdrawn EP1164577A3 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP27941095 1995-10-26
JP27941095 1995-10-26
JP28067295 1995-10-27
JP28067295 1995-10-27
EP96307741A EP0770987B1 (en) 1995-10-26 1996-10-25 Method and apparatus for reproducing speech signals, method and apparatus for decoding the speech, method and apparatus for synthesizing the speech and portable radio terminal apparatus

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP96307741A Division EP0770987B1 (en) 1995-10-26 1996-10-25 Method and apparatus for reproducing speech signals, method and apparatus for decoding the speech, method and apparatus for synthesizing the speech and portable radio terminal apparatus

Publications (2)

Publication Number Publication Date
EP1164577A2 EP1164577A2 (en) 2001-12-19
EP1164577A3 true EP1164577A3 (en) 2002-01-09

Family

ID=27237803

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01121724A Withdrawn EP1164577A3 (en) 1995-10-26 1996-10-25 Method and apparatus for reproducing speech signals

Country Status (1)

Country Link
EP (1) EP1164577A3 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4435832A (en) * 1979-10-01 1984-03-06 Hitachi, Ltd. Speech synthesizer having speech time stretch and compression functions
EP0279451A2 (en) * 1987-02-20 1988-08-24 Fujitsu Limited Speech coding transmission equipment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4435832A (en) * 1979-10-01 1984-03-06 Hitachi, Ltd. Speech synthesizer having speech time stretch and compression functions
EP0279451A2 (en) * 1987-02-20 1988-08-24 Fujitsu Limited Speech coding transmission equipment

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
NISHIGUCHI M ET AL: "HARMONIC AND NOISE CODING OF LPC RESIDUALS WITH CLASSIFIED VECTOR QUANTIZATION", PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING (ICASSP). DETROIT, MAY 9 - 12, 1995. SPEECH, NEW YORK, IEEE, US, vol. 1, 9 May 1995 (1995-05-09), pages 484 - 487, XP000658036, ISBN: 0-7803-2432-3 *
QUATIERI T F ET AL: "SHAPE INVARIANT TIME-SCALE AND PITCH MODIFICATION OF SPEECH", IEEE TRANSACTIONS ON SIGNAL PROCESSING, IEEE, INC. NEW YORK, US, vol. 40, no. 3, 1 March 1992 (1992-03-01), pages 497 - 510, XP000294868, ISSN: 1053-587X *

Also Published As

Publication number Publication date
EP1164577A2 (en) 2001-12-19

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