Global Patent Index - EP 1970894 A1

EP 1970894 A1 20080917 - Method and device for modifying an audio signal

Title (en)

Method and device for modifying an audio signal

Title (de)

Vorrichtung und Verfahren zur Änderung eines Audiosignals

Title (fr)

Procédé et dispositif de modification d'un signal audio

Publication

EP 1970894 A1 20080917 (FR)

Application

EP 08151708 A 20080220

Priority

FR 0753759 A 20070312

Abstract (en)

The method involves applying a modification operation to an initial audio signal to deliver an intermediate audio signal. Another modification operation implemented by a pitch synchronous overlap and add technique is applied to the intermediate signal to deliver a final audio signal based on a modification factor. The factor is determined in a manner to take into account effects of the former operation on a fundamental frequency of the initial signal so that fundamental frequency obtained by the final signal conforms to a modification setpoint relative to the frequency of the initial signal. An independent claim is also included for a computer program comprising instructions to perform a method for modifying acoustic characteristics of an initial audio signal with respect to modification setpoints.

Abstract (fr)

Ce procédé de modification des caractéristiques acoustiques d'un signal audio initial en fonction de consignes de modification relatives au moins à la fréquence fondamentale et l'enveloppe spectrale du signal initial, comprend : - une première opération de modification (E12) appliquée au signal initial (S(n)) afin de délivrer un signal audio intermédiaire (S1 (n)), la première opération de modification étant destinée à déformer l'enveloppe spectrale du signal initial selon ladite consigne de modification de l'enveloppe spectrale, et - une seconde opération de modification (E13) appliquée au signal intermédiaire (S1(n)) afin de délivrer un signal audio final (S2(n)), la seconde opération étant destinée à modifier au moins la fréquence fondamentale du signal intermédiaire, selon un facteur de modification qui est déterminé de manière à prendre en compte les effets de la première opération de modification sur la fréquence fondamentale du signal audio initial, de sorte que la fréquence fondamentale obtenue pour le signal final soit conforme à la consigne relative à la fréquence fondamentale.

IPC 8 full level

G10L 13/02 (2006.01); G10L 13/033 (2013.01); G10L 21/04 (2006.01); G10L 21/00 (2006.01); G10L 21/013 (2013.01)

CPC (source: EP)

G10L 13/033 (2013.01); G10L 21/04 (2013.01); G10L 2021/0135 (2013.01)

Citation (applicant)

  • EP 0363233 A1 19900411 - FRANCE ETAT [FR]
  • D. VINCENT; O. ROSEC; T. CHONAVEL: "Glottal closure instant estimation using an appropriateness measure of the source and continuity constraints", IEEE ICASSP'06, vol. 1, May 2006 (2006-05-01), pages 381 - 384
  • A.K. SYRDAL; S.A. STEELE: "Vowel F1 as a function of speaker fundamental frequency", 110TH MEETING OF JASA, vol. 78, 1985
  • E. MOULINES; J. LAROCHE: "Non-parametric techniques for pitch- scale and time-scale modification of speech", SPEECH COMMUNICATION, vol. 16, 1995, pages 175 - 205, XP004024959, DOI: doi:10.1016/0167-6393(94)00054-E
  • Y. STYLIANOU: "Harmonic plus Noise Model for speech, combined with statistical methods, for speech and speaker modification", ECOLE NATIONALE SUPÉRIEURE DES TÉLÉCOMMUNICATIONS, 1996
  • A. KAIN; Y. STYLIANOU: "Stochastic modeling of spectral adjustment for high quality pitch modification", PROCEEDINGS OF ICASSP'OO, vol. 2, June 2000 (2000-06-01), pages 949 - 952, XP010504881
  • J. E. HUBER ET AL.: "Formants of children, women, and men: the effect of vocal intensity variation", JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, vol. 106, no. 3, September 1999 (1999-09-01), pages 1532 - 1542, XP012001200, DOI: doi:10.1121/1.427150

Citation (search report)

  • [X] WO 2006106466 A1 20061012 - KONINKL PHILIPS ELECTRONICS NV [NL], et al
  • [DA] MOULINES E ET AL: "Non-parametric techniques for pitch-scale and time-scale modification of speech", SPEECH COMMUNICATION, ELSEVIER SCIENCE PUBLISHERS, AMSTERDAM, NL, vol. 16, no. 2, February 1995 (1995-02-01), pages 175 - 205, XP004024959, ISSN: 0167-6393

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA MK RS

DOCDB simple family (publication)

EP 1970894 A1 20080917; US 2008255830 A1 20081016; US 8121834 B2 20120221

DOCDB simple family (application)

EP 08151708 A 20080220; US 7575908 A 20080312