Patent ID: 8069049
Filing Date: 2011-11-29
Classification: G10L

Abstract:
1. A system for enhancing a signal regenerated from an encoded speech signal, comprising: a decoder at a terminal arranged to receive the encoded speech signal and produce a decoded speech signal comprising a voiced speech signal; feature extraction means arranged to receive at least one of the decoded and encoded speech signal and extract at least one feature from at least one of the decoded and encoded speech signal; mapping means arranged to map said at least one feature to an artificially generated noise signal and operable to generate and output said noise signal, whereby the noise signal has a frequency band that is within the decoded speech signal frequency band; and mixing means arranged to receive said decoded speech signal and said noise signal and mix said noise signal with the voiced speech signal in the decoded speech signal frequency band; wherein the mixing means is further arranged to receive a power for a location in the spectrum of the decoded speech signal and mixing said noise signal and the decoded speech signal at the location and according to the received power.