EP 0518742 A1 19921216 - Method for detecting a noisy wanted signal.
Title (en)
Method for detecting a noisy wanted signal.
Title (de)
Verfahren zur Ermittlung eines verrauschten Nutzsignals.
Title (fr)
Procédé de détection d'un signal utile bruité.
Publication
Application
Priority
FR 9107323 A 19910614
Abstract (en)
In order to detect a noisy wanted signal, a measurement of the expected S/N ratio of this signal is taken over one time slice, a measurement of the estimated white noise alone is taken over another time slice without wanted signal, the mean energy of the noise and of the noisy signal are calculated, each in its time slice, the theoretical detection threshold and the ratio of these two energies are calculated, and the ratio is compared with the calculated threshold, this threshold being greater than 1 (ideal threshold).
IPC 1-7
IPC 8 full level
G10L 11/02 (2006.01); G10L 21/02 (2006.01); G10L 25/78 (2013.01)
CPC (source: EP US)
G10L 25/78 (2013.01 - EP US)
Citation (search report)
- [A] US 4410763 A 19831018 - STRAWCZYNSKI LEO [CA], et al
- [A] US 4052568 A 19771004 - JANKOWSKI JOSEPH ALBIN
- [A] IEEE TRANSACTIONS ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, vol. ASSP-31, no. 3, juin 1983, pages 678-684, New York, US; P. DE SOUZA: "A statistical approach to the design of an adaptive self-normalizing silence detector"
- [A] IBM TECHNICAL DISCLOSURE BULLETIN, vol. 29, no. 12, May 1987, pages 5606-5609, Armonk, New York, US; "Digital signal processing algorithm for microphone input energy detection having adaptive sensitivity"
Designated contracting state (EPC)
BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0518742 A1 19921216; EP 0518742 B1 19980415; DE 69225090 D1 19980520; DE 69225090 T2 19980806; FR 2677828 A1 19921218; FR 2677828 B1 19930820; JP H06503185 A 19940407; US 5337251 A 19940809; WO 9222889 A1 19921223
DOCDB simple family (application)
EP 92401553 A 19920605; DE 69225090 T 19920605; FR 9107323 A 19910614; FR 9200504 W 19920605; JP 51106992 A 19920605; US 97244593 A 19930204