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Dive into the research topics where S. Katherine Lam is active.

Publication


Featured researches published by S. Katherine Lam.


Journal of the Acoustical Society of America | 1998

Variable rate vocoder

Paul E. Jacobs; William R. Gardner; Chong U. Lee; Klein S. Gilhousen; S. Katherine Lam; Ming-Chang Tsai

A method of speech signal compression, by variable rate coding of frames of digitized speech samples, comprising the steps of: determining a level of speech activity for a frame of digitized speech samples; selecting an encoding rate from a set of rates based upon said determined level of speech activity for said frame; coding said frame according to a coding format of a set of coding formats for said selected rate wherein each rate has a corresponding different coding format and wherein each coding format provides for a different plurality of parameter signals representing said digitized speech samples in accordance with a speech model; and generating for said frame a data packet of said parameter signals.


Archive | 1994

Method and apparatus for determining the transmission data rate in a multi-user communication system

William R. Gardner; Paul E. Jacobs; Roberto Padovani; Noam A. Ziv; S. Katherine Lam; Andrew P. Dejaco


Archive | 1995

Detection and bypass of tandem vocoding using detection codes

Lindsay A. Weaver; S. Katherine Lam; William R. Gardner; Paul E. Jacobs


Archive | 1996

Method and apparatus for detection of tandem vocoding to modify vocoder filtering

Lindsay A. Weaver; S. Katherine Lam; William R. Gardner; Paul E. Jacobs; Andrew P. Dejaco; Gilbert C. Sih


Archive | 1996

Method and apparatus for detection and bypass of tandem vocoding

Lindsay A. Weaver; S. Katherine Lam; Paul E. Jacobs; William R. Gardner; Andrew P. Dejaco; Gilbert C. Sih


Archive | 2002

Method and apparatus for determining transmission data rate in multi-user communication system

Andrew P. Dejaco; William R. Gardner; Paul E. Jacobs; S. Katherine Lam; Roberto Padovani; Noam A. Ziv; アンドリュー・ピー・デジャコ; ウイリアム・アール・ガードナー; エス・キャサリン・ラム; ノアム・エー・ジブ; ポール・イー・ジエイコブス; ロベルト・パドバーニ


Archive | 2001

Method and system of estimating background noise level

William R. Gardner; Klein S. Gilhousen; Paul E. Jacobs; S. Katherine Lam; Chong U. Lee; Ming-Chang Tsai; ウイリアム・アール・ガードナー; エス・キャサリン・ラム; クライン・エス・ギルハウセン; チョン・ユー・リー; ポール・イー・ジェイコブス; − チャン・ツァイ ミン


Archive | 2001

VARIABLE SPEED VOCODER

William R. Gardner; Klein S. Gilhousen; Paul E. Jacobs; S. Katherine Lam; Chong U. Lee; Ming-Chang Tsai; ウイリアム・アール・ガードナー; エス・キャサリン・ラム; クライン・エス・ギルハウセン; チョン・ユー・リー; ポール・イー・ジェイコブス; ミン−チャン・ツァイ


Archive | 2005

Method and system of estimating background noise energy level

William R. Gardner; Klein S. Gilhousen; Paul E. Jacobs; S. Katherine Lam; Chong U. Lee; Ming-Chang Tsai; ウィリアム・アール・ガードナー; エス・キャサリン・ラム; クライン・エス・ギルハウセン; チョン・ユー・リー; ポール・イー・ジェイコブス; ミン−チャン・ツァイ


Archive | 1994

Procede et appareil de determination du debit de donnees transmises dans un systeme de communications a plusieurs utilisateurs

William R. Gardner; Paul E. Jacobs; Roberto Padovani; Noam A. Ziv; S. Katherine Lam; Andrew P. Dejaco

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