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Title: US5671330: Speech synthesis using glottal closure instants determined from adaptively-thresholded wavelet transforms
[ Derwent Title ]


Country: US United States of America

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9 pages

 
Inventor: Sakamoto, Masaharu; Yokohama, Japan
Kobayashi, Mei; Tokyo, Japan
Saito, Takashi; Tokyo, Japan
Nishimura, Masafumi; Yokohama, Japan

Assignee: International Business Machines Corporation, Armonk, NY
other patents from INTERNATIONAL BUSINESS MACHINES CORPORATION (280070) (approx. 44,393)
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Published / Filed: 1997-09-23 / 1995-07-11

Application Number: US1995000500793

IPC Code: Advanced: G06F 17/14; G10L 11/00; G10L 13/00; G10L 13/06; G10L 15/02; G10L 21/06; G10L 13/08;
IPC-7: G10L 5/04;

ECLA Code: G10L13/07; S10L13/04; S10L25/27;

U.S. Class: Current: 704/268; 704/207; 704/264; 704/267; 704/E13.01;
Original: 395/002.77; 395/002.16; 395/002.73; 395/002.76;

Field of Search: 395/2.16,2.2,2.73,2.76,2.77

Priority Number:
1994-09-21  JP1994000226667

Abstract:     A speech synthesis system making use of a pitch-synchronous waveform overlap method to realize stable speech synthesis processing in which pitch shaking is negligible. The present invention is characterized in that glottal closure instants are used as reference points (pitch marks) for overlapping. Since the glottal closure instants can be extracted stably and accurately by using dyadic Wavelet conversion, speech in which pitch shaking is negligible and rumbling sounds are minimized can be synthesized stably. In addition, more flexible waveform separation becomes possible by setting the reference point for overlapping and the reference point for waveform separation to different positions. The extraction of glottal closure instants is performed by searching the local peaks of the dyadic Wavelet conversion, but preferably a threshold value for searching for the local peaks of the dyadic Wavelet conversion is adaptively controlled each time dyadic Wavelet conversion is obtained.

Attorney, Agent or Firm: Tassinari, Jr., Robert P. ;

Primary / Asst. Examiners: MacDonald, Allen R.; Smits, Talivadis Ivars

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Designated Country: DE FR GB 

Family: Show 4 known family members

First Claim:
Show all 12 claims
We claim:     1. A speech synthesis method comprising the steps of:
  • (a) detecting the glottal closure instants in digitized speech signals;
  • (b) pitch-marking said speech signal at said glottal closure instants;
  • (c) separating speech synthesis waveform units from said speech signals at the points different from said pitch-marked points;
  • (d) storing the separated speech synthesis waveform units; and
  • (e) obtaining synthesized speech signals by shifting the stored speech synthesis waveform units along a synthesis pitch and overlapping them at the pitch-marked glottal closure instants as reference points.


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Forward References: Show 12 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (12)   |   Backward references (5)   |   Citation Link

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Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 19pp US5054085  1991-10 Meisel et al.  Speech Systems, Inc. Preprocessing system for speech recognition
Get PDF - 17pp US5175769  1992-12 Hejna, Jr. et al.  ROLM Systems Method for time-scale modification of signals
Get PDF - 20pp US5479564  1995-12 Vogten et al.  U.S. Philips Corporation Method and apparatus for manipulating pitch and/or duration of a signal
Get PDF - 10pp US5524172  1996-06 Hamon  Represented By The Ministry Of Posts Telecommunications and Space Centre National d'Etudes des Telecommunicationss Processing device for speech synthesis by addition of overlapping wave forms
Get PDF - 19pp US5581652  1996-12 Abe et al.  Nippon Telegraph and Telephone Corporation Reconstruction of wideband speech from narrowband speech using codebooks
       
Foreign References:
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Publication Date IPC Code Assignee   Title
Get PDF - 21pp WO9526024 1995-09  G10L 5/04 BRITISH TELECOMM SPEECH SYNTHESIS 


Other Abstract Info: DERABS G96-161870

Other References:
  • Stephane Mallat and Sifen Zhong, "Characterization of Signals from Multiscale Edges," IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 14, No. 7, pp. 710-732. Jul. 1992. (23 pages) Cited by 28 patents [ISI abstract]
  • Gianpolo Evangelista, "Pitch-Synchronous Wavelet Representation of Speech and Music Signals," IEEE Transactions on Signal Processing, vol. 41, No. 12, pp. 3313-3330. Dec. 1993. (18 pages) Cited by 2 patents [ISI abstract]
  • Lunji Qiu, Soo-Ngee Koh, and Hayun Yang, "Pitch Determination of Noisy Speech Using Wavelet Transform in Time and Frequency Domains," Proceedings of IEEE TENCON '93, pp. 337-340. Oct. 1993.
  • Glenn A. Shelby, Christopher M. Cooper, and Reza R. Adhami, "A Wavelet-Base Speech Pitch Detector for Tone Languages," Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis, pp. 596-599. Oct. 1994.
  • William J. Pielemeier, Gregory H. Wakefield, and Mary H. Simoni, "Time-Frequency Analysis of Musical Signals," Proc. IEEE, vol. 84, No. 9, pp. 1216-1230. Sep. 1996. (15 pages) [ISI abstract]


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