A method of regenerating wideband speech from narrowband speech, the method comprising: receiving samples of a narrowband speech signal in a first range of frequencies; modulating received samples of the narrowband speech signal with a modulation signal having a modulating frequency adapted to upshift each frequency in the first range of frequencies by an amount determined by the modulating frequency wherein the modulating frequency is selected to translate into a target band a selected frequency band within the first range of signals; filtering the modulated samples using a target band filter to form a regenerated speech signal in the target band; and combining the narrow band speech signal with the regenerated speech signal in the target band to regenerate a wideband speech signal, the method comprising the step of controlling the modulated samples to lie in a second range of frequencies identified by determining a signal characteristic of frequencies in the first range of frequencies.
申请公布号
WO2010066861(A2)
申请公布日期
2010.06.17
申请号
WO2009EP66876
申请日期
2009.12.10
申请人
SKYPE LIMITED;NILSSON, MATTIAS;VANG ANDERSEN, SOREN;VOS, KOEN BERNARD
发明人
NILSSON, MATTIAS;VANG ANDERSEN, SOREN;VOS, KOEN BERNARD