Title (en)

METHOD AND APPARATUS FOR SPEECH ANALYSIS, SYNTHESIS AND CODING

Publication

EP 0347338 A3 19920129 (FR)

Application

EP 89420197 A 19890608

Priority

FR 8808255 A 19880614

Abstract (en)

[origin: EP0347338A2] A means of analysing and of synthesising speech is described, using the simulation of the acoustic behaviour of a tube divided into segments with variable cross-section. The variations in cross-section of the various segments of a tube allow the generation of phonemes when an air pressure and delivery source is positioned similar to the human vocal cords. By simulation, these phonemes can be generated in the form of electrical signals delivered to a loud-speaker. The invention bears upon the choice of the lengths of the tube segments and relates this choice to the fineness of the approximation which it is desired to make. For an approximation with three formants (the formants are the resonant frequencies of the tube), the tube is divided into eight segments of successive lengths L/10, L/15, 2L/15, 3L/15, 3L/15, 2L/15, L/15 and L/10; L is the total length of the tube. <IMAGE>

IPC 1-7

G10L 9/10

IPC 8 full level

G10L 11/00 (2006.01); G10L 25/00 (2013.01)

CPC (source: EP US)

G10L 25/00 (2013.01 - EP US)

Citation (search report)

• [XP] SPEECH COMMUNICATION, vol. 7, no. 3, octobre 1988, pages 257-286, Amsterdam, NL; M. MRAYATI et al.: "Distinctive regions and modes: a new theory of speech production"
• [A] ICASSP'86 (IEEE-IECEJ-ASJ INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING), Tokyo, 7-11 avril 1986, vol. 3, pages 2011-2014, IEEE, New York, US; W. FRANK et al.: "Improved vocal tract models for speech synthesis"
• [A] IRE TRANSACTIONS ON CIRCUIT THEORY, vol. CT-3, no. 4, décembre 1956, pages 232-244, New York, US; E.E. DAVID, Jr.: "Signal theory in speech transmission"
• [A] THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, vol. 22, no. 6, novembre 1950, pages 740-753, New York, US; H.K. DUNN: "The calculation of vowel resonances, and an electrical vocal tract"
• [A] J.L. FLANAGAN: "Speech Analysis Synthesis and Perception", 1965, pages 166-171, Springer-Verlag, Berlin, DE

Designated contracting state (EPC)

DE FR GB IT NL

DOCDB simple family (publication)

EP 0347338 A2 19891220; EP 0347338 A3 19920129; FR 2632725 A1 19891215; FR 2632725 B1 19900928; US 5121434 A 19920609

DOCDB simple family (application)

EP 89420197 A 19890608; FR 8808255 A 19880614; US 36556689 A 19890614