公开(公告)号：US10789965B2

公开(公告)日：2020-09-29

申请号：US16026131

申请日：2018-07-03

Applicant: Silicon Laboratories Inc.

Inventor： Bradley Arthur Wallace ,  Carl Harry Alelyunas

IPC: G10L19/02 ,  G06F17/14 ,  G06K9/00

Abstract: In one example, an apparatus includes: a wavelet transform engine to receive a first signal stream and perform a wavelet transform on a first time domain sample of the first signal stream, the first wavelet transform engine to output at least one first coefficient for a first frequency range; an energy calculation circuit to compute a first energy signature for the at least one first coefficient; and a correlation circuit to generate a correlation value using the first energy signature, a second energy signature and a plurality of previous energy signatures.

公开(公告)号：US20200013420A1

公开(公告)日：2020-01-09

申请号：US16026131

申请日：2018-07-03

Applicant: Silicon Laboratories Inc.

Inventor： Bradley Arthur Wallace ,  Carl Harry Alelyunas

IPC: G10L19/02 ,  G06F17/14 ,  G06K9/00

Abstract: In one example, an apparatus includes: a wavelet transform engine to receive a first signal stream and perform a wavelet transform on a first time domain sample of the first signal stream, the first wavelet transform engine to output at least one first coefficient for a first frequency range; an energy calculation circuit to compute a first energy signature for the at least one first coefficient; and a correlation circuit to generate a correlation value using the first energy signature, a second energy signature and a plurality of previous energy signatures.

公开(公告)号：US10419047B1

公开(公告)日：2019-09-17

申请号：US16225722

申请日：2018-12-19

Applicant: Silicon Laboratories Inc.

Inventor： Carl Harry Alelyunas ,  Russell Croman ,  Thomas Glen Ragan ,  Tarang Shah

IPC: H04B1/10 ,  H04B1/00

Abstract: In one embodiment, a noise cancellation circuit includes: a window generator to generate a window having a first set of samples; a band splitter to split the window into pairs of symmetric frequency components; a processing circuit, for each of the pairs, to: compare a first magnitude of a first symmetric frequency component to a second magnitude of a second symmetric frequency component and modify one of the components based at least in part on the comparison; an integrator to integrate the pairs output from the processing circuit; and a second window generator to generate a second window having a second set of samples.