发明名称 |
ESTIMATION AND SUPPRESSION OF HARMONIC LOUDSPEAKER NONLINEARITIES |
摘要 |
A harmonic echo power estimator estimates power of echo generated by harmonic loudspeaker nonlinearities in a user equipment having an echo path between a loudspeaker input and a microphone output. The estimator includes a frequency band mapper that maps each frequency band in a set of loudspeaker output signal frequency bands into a corresponding array of loudspeaker input signal frequency bands, where each frequency band in the set is mapped into several frequency bands in the corresponding array. A power estimator determines a power estimate of each input signal in each array of frequency bands. A power estimate combiner combines determined power estimates in each array of frequency bands into a corresponding estimate of loudspeaker input power generating harmonic loudspeaker nonlinearities. A power estimate transformer transforms the estimates of loudspeaker input power across the echo path into power estimates of the echo generated by the harmonic loudspeaker nonlinearities. |
申请公布号 |
ZA201304705(B) |
申请公布日期 |
2014.09.25 |
申请号 |
ZA20130004705 |
申请日期 |
2013.06.24 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) |
发明人 |
ERIKSSON ANDERS;AHGREN PER |
分类号 |
G10L21/02;G10L21/0208;H04B;H04M |
主分类号 |
G10L21/02 |
代理机构 |
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代理人 |
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地址 |
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