Inventor · disambiguated record
Christopher W. Springfield
Also filed as: SPRINGFIELD CHRISTOPHER W · SPRINGFIELD CHRISTOPHER WAYNE
6 granted patents·1 pending application·139 citations·filing 1999–2012
83Inventor score
Top patents by PatentIndex Score
7 records- 0185US7046794B2Double talk activity detector and method for an echo canceler circuitMOTOROLA INC·Filed 2003·Granted May 16, 2006·49 cites·25 claims
- 0282US6799062B1Full-duplex hands-free transparency circuit and method thereforMOTOROLA INC·Filed 2000·Granted Sep 28, 2004·34 cites·21 claims
- 0363US6618701B2Method and system for noise suppression using external voice activity detectionMOTOROLA INC·Filed 1999·Granted Sep 9, 2003·52 cites·16 claims
- 0460US7599483B2Echo canceler circuit and methodTEMIC AUTOMOTIVE NA INC·Filed 2003·Granted Oct 6, 2009·4 cites·19 claims
- 0550US8811603B2Echo canceler circuit and methodPIKET JAMES B·Filed 2012·Granted Aug 19, 2014·0 cites·23 claims
- 0649US8238546B2Echo canceler circuit and methodPIKET JAMES B·Filed 2009·Granted Aug 7, 2012·0 cites·3 claims
- 0736US2006288067A1Reduced complexity recursive least square lattice structure adaptive filter by means of approximating the forward error prediction squares using the backward error prediction squaresMOTOROLA INC·Filed 2006·Application pending·0 cites
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