Subject: Can Audio be further Compressed by Replacing FFT Magnitude From: Fa Long Luo <falong.luo(at)QSTECH.COM> Date: Wed, 28 May 2003 10:46:17 -0700This is a multi-part message in MIME format. ------_=_NextPart_001_01C32541.0A4EBC60 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dear Experts and Lists, I would be most grateful if you could give any comment, advice and = further information about the idea: further audio compression with = excitation pattern replacing the FFT magnitude spectrum used in = calculating masked threshold and the related bit allocation in current = audio codecs such as AC3 and AAC. . The motivation for this thought is = on the basis of the fact that excitation patterns are much flatter than = the magnitude spectrum. Thank you for your kind attention. I am looking forward to hearing your Reponses. Fa-Long Luo =20 ------_=_NextPart_001_01C32541.0A4EBC60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; = charset=3Diso-8859-1"> <META NAME=3D"Generator" CONTENT=3D"MS Exchange Server version = 6.0.6249.1"> <TITLE>Can Audio be further Compressed by Replacing FFT Magnitude = Spectrum with Excitation Pattern</TITLE> </HEAD> <BODY> <!-- Converted from text/rtf format --> <P><FONT FACE=3D"Arial Narrow">Dear Experts and Lists,</FONT> <BR><FONT FACE=3D"Arial Narrow"> I would be most = grateful if you could give any comment, advice and further information = about the idea: further audio compression with excitation = pattern replacing the FFT magnitude spectrum used in = calculating masked threshold and the related bit allocation in current = audio codecs such as AC3 and AAC. . The motivation for this thought is = on the basis of the fact that excitation patterns are much flatter = than the magnitude spectrum.</FONT></P> <P><FONT FACE=3D"Arial Narrow"> Thank you for your = kind attention.</FONT> <BR><FONT FACE=3D"Arial Narrow"> I am looking forward = to hearing your Reponses.</FONT> </P> <P><FONT FACE=3D"Arial Narrow">Fa-Long Luo</FONT> <BR><FONT SIZE=3D2 FACE=3D"Arial"> </FONT> </P> </BODY> </HTML> ------_=_NextPart_001_01C32541.0A4EBC60--