Global Patent Index - EP 2760221 A1

EP 2760221 A1 20140730 - Microphone hiss mitigation

Title (en)

Microphone hiss mitigation

Title (de)

Mikrofonzischabschwächung

Title (fr)

Atténuation de sifflements perceptibles de microphone

Publication

EP 2760221 A1 20140730 (EN)

Application

EP 13153113 A 20130129

Priority

EP 13153113 A 20130129

Abstract (en)

A system and method for mitigating microphone hiss may obtain a frequency spectrum characteristic for a microphone. A microphone that has limited dynamic range may create microphone hiss in an output signal. The microphone hiss may prevent a reproduction of a sound field, represented in an output signal of the microphone, from being perceived as a natural environment. The microphone frequency spectrum may be obtained using static measurements or calculated dynamically. A virtual noise floor may be calculated responsive to the microphone frequency spectrum and a desired noise floor. Gain coefficients may be calculated responsive to the output signal of the microphone. The gain coefficients may be calculated to mitigate undesirable signal content including background noise and echoes. The calculated gain coefficients may be modified responsive to the virtual noise floor. The modified gain coefficients may allow a reproduction of the sound field to be perceived as a natural environment.

IPC 8 full level

H04R 3/04 (2006.01); G10L 21/0208 (2013.01)

CPC (source: EP)

G10L 21/0208 (2013.01); H04R 3/04 (2013.01); H04R 2410/00 (2013.01)

Citation (applicant)

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 RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 2760221 A1 20140730

DOCDB simple family (application)

EP 13153113 A 20130129