Method for Comfort Noise Generation and Voice Activity Detection for use in Echo Cancellation System

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F10%3A00171017" target="_blank" >RIV/68407700:21230/10:00171017 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Method for Comfort Noise Generation and Voice Activity Detection for use in Echo Cancellation System
Original language description
This paper relates to communications systems, and more particularly, to principles of comfort noise generation for echo cancellers in a bidirectional communications link. According to the invention, noise model parameters are computed during periods of speech inactivity (i.e., when only noise is present) and frozen during periods of speech activity. Prevailing noise model parameters are then used to generate high quality comfort noise which is substituted for actual noise whenever the actual noise is muted or attenuated by an echo suppressor. Since the comfort noise closely matches the actual background noise in terms of both character and level, far-end users perceive signal continuity and are not distracted by the artifacts introduced by conventionalmethods.
Czech name
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Czech description
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Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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