Chris S. Lee
Engineers at Kingswood, Irvine, CA
License number
Colorado 44498
Issued Date
Jul 2, 2010
Renew Date
Nov 1, 2013
Expiration Date
Oct 31, 2015
Type
Professional Engineer
Address
Address
157 Kingswood, Irvine, CA 92620
Professional information
Adaptive Postfiltering Methods And Systems For Decoding Speech
US Patent:
8032363, Oct 4, 2011
Filed:
Aug 9, 2002
Appl. No.:
10/215048
Inventors:
Jes Thyssen - Laguna Niguel CA, US
Chris C Lee - Irvine CA, US
Chris C Lee - Irvine CA, US
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
G10L 19/14, G10L 21/02
US Classification:
704225, 704226, 704227, 704228, 704216, 704219, 704220, 704223, 704232, 704201, 704500, 704501, 704502, 704503, 704504
Abstract:
A method of processing a decoded speech (DS) signal including successive DS frames, each DS frame including DS samples. The method comprises: adaptively filtering the DS signal to produce a filtered signal; gain-scaling the filtered signal with an adaptive gain updated once a DS frame, thereby producing a gain-scaled signal; and performing a smoothing operation to smooth possible waveform discontinuities in the gain-scaled signal.
Method And Apparatus To Eliminate Discontinuities In Adaptively Filtered Signals
US Patent:
7353168, Apr 1, 2008
Filed:
Jun 28, 2002
Appl. No.:
10/183418
Inventors:
Jes Thyssen - Laguna Niguel CA, US
Chris C Lee - Irvine CA, US
Chris C Lee - Irvine CA, US
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
G10L 19/10
US Classification:
704220, 704207, 704223, 704230
Abstract:
A method to eliminate discontinuities in an adaptively filtered signal includes filtering a beginning portion of a current signal frame using a past set of filter coefficients, thereby producing a first filtered frame portion. The method also includes filtering the beginning portion of the current signal frame using a current set of filter coefficients, thereby producing a second filtered frame portion. The method also includes modifying the second filtered frame portion with the first filtered frame portion so as to smooth a possible filtered signal discontinuity between the second filtered frame portion and a past filtered frame produced using the past filter coefficients.