Global Patent Index - EP 2474975 A1

EP 2474975 A1 20120711 - Method for estimating speech quality

Title (en)

Method for estimating speech quality

Title (de)

Verfahren zur Schätzung der Sprachqualität

Title (fr)

Procédé d'évaluation de la qualité vocale

Publication

EP 2474975 A1 20120711 (EN)

Application

EP 12000483 A 20100521

Priority

  • EP 12000483 A 20100521
  • EP 10005327 A 20100521

Abstract (en)

The invention relates to a method for estimating speech quality, wherein a reference speech signal (301) enters a telecommunication network resulting in a test speech signal (302) and wherein the method comprises the following steps of aligning the reference speech signal (301) and the test speech signal (302) by matching signal parts of the reference speech signal (301) with signal parts of the test speech signal (302), wherein matched signal parts (303, 304) are of similar length in the time domain and have similar intensity summed over their length, and computing and comparing the speech spectra of the reference speech signal (301) and the test speech signal (302) that are aligned, resulting in a difference measure, the difference measure being indicative of the speech quality of the test speech signal.

IPC 8 full level

G10L 19/00 (2006.01); G10L 25/69 (2013.01)

CPC (source: EP)

G10L 25/69 (2013.01)

Citation (applicant)

  • PAULUS, E.; ZWICKER, E.: "Programme zur automatischen Bestimmung der Lautheit aus Terzpegeln oder Frequenzgruppenpegeln", ACUSTICA, vol. 27, no. 5, 1972
  • BEERENDS, J.G.; HEKSTRA, A.P.; RIX, A.W.; HOLLIER, M.P.: "Perceptual Evaluation of Speech Quality (PESQ), the new ITU standard for end-to-end speech quality assessment. Part I - Time alignment", J. AUDIO. ENG. SOC., vol. 50, October 2002 (2002-10-01)
  • BEERENDS, J.G.; HEKSTRA, A.P.; RIX, A.W.; HOLLIER, M.P.: "Peceptial Evaluation of Speech Quality (PESQ), the new ITU standard for end-to-end speech quality assessment. Part II - Psychoacoustic model", J. AUDIO ENG. SOC., vol. 50, no. 10, October 2002 (2002-10-01)
  • BEERENDS, J.G.; STEMERDINK, J.A.: "A perceptual speech quality measure based on a psychoacoustic sound representation", J. AUDIO ENG. SOC., vol. 42, no. 3, December 1994 (1994-12-01)
  • "TOSQA - Telecommunication objective speech quality assessment", COM12-34-E, December 1997 (1997-12-01)
  • "Methods for subjective determination of transmission quality", ITU-T RECOMMENDATION, 1996, pages 800
  • "Objective measurement of active speech level", ITU-T RECOMMENDATION, 1993, pages 56

Citation (search report)

Designated contracting state (EPC)

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

Designated extension state (EPC)

BA ME RS

DOCDB simple family (publication)

EP 2388779 A1 20111123; EP 2388779 B1 20130220; EP 2474975 A1 20120711; EP 2474975 B1 20130501

DOCDB simple family (application)

EP 10005327 A 20100521; EP 12000483 A 20100521