Global Patent Index - EP 0167364 A1

EP 0167364 A1 19860108 - Speech-silence detection with subband coding.

Title (en)

Speech-silence detection with subband coding.

Title (de)

Sprachpausenbestimmung mit Teilbandkodierung.

Title (fr)

Détection parole-silence avec codage par sous-bandes.

Publication

EP 0167364 A1 19860108 (EN)

Application

EP 85304627 A 19850628

Priority

US 62858384 A 19840706

Abstract (en)

Speech detection is accomplished in conjunction with two-band subband encoding. A detection statistic T (i tau 0), used to estimate the short-term speech energy, is developed from energy estimates made in each subband. A speech presence energy threshold lambda ON a speech silence energy threshold lambda OFF and lambda OFF are computed which adapt to the long-term speech level. The detection statistic is compared to the thresholds to make a decision concerning the presence or absence of speech. Also disclosed are considerations for extrapolating the detection to result in an arrangement with more than two subbands.

IPC 1-7

G10L 3/00

IPC 8 full level

G10L 19/00 (2006.01); G10L 11/00 (2006.01); G10L 11/02 (2006.01); H03M 7/30 (2006.01); H04B 14/04 (2006.01)

CPC (source: EP)

G10L 25/78 (2013.01)

Citation (search report)

  • [A] EP 0110467 A1 19840613 - PHILIPS KOMMUNIKATIONS IND AG [DE], et al
  • [A] DE 3235279 A1 19830421 - NISSAN MOTOR [JP]
  • [A] FR 2451680 A1 19801010 - SOUMAGNE JOEL
  • [A] IEEE TRANSACTIONS ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, vol. ASSP-28, no. 5, October 1980, pages 550-561, IEEE, New York, US; B.V. COX et al.: "Nonparametric rank-order statistics applied to robust-voiced-unvoiced-silence classification"
  • [A] TELECOMMUNICATIONS AND RADIO ENGINEERING, vol. 4, April 1965, pages 70-72, Washington, US; V.N. TETEREV: "A combinatorial method of detecting speech signals in a background of smooth noise"
  • [A] IEEE TRANSACTIONS ON COMMUNICATIONS, vol. COM-24, no. 5, May 1976, pages 563-567, New York, US; R.W. SCHAFER et al.: "Detecting the presence of speech using ADPCM coding"

Designated contracting state (EPC)

DE FR

DOCDB simple family (publication)

EP 0167364 A1 19860108; JP S6132900 A 19860215

DOCDB simple family (application)

EP 85304627 A 19850628; JP 14687785 A 19850705