Perceptual Weighting filter in AMR-WB (or AMR-WB+) (#ARIJIT BISWAS# )

Subject: Perceptual Weighting filter in AMR-WB (or AMR-WB+) From: #ARIJIT BISWAS# <arijit17@xxxxxxxx> Date: Mon, 28 Aug 2006 22:03:12 +0800 This is a multi-part message in MIME format. ------_=_NextPart_001_01C6CAAB.2D7E595E Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dear Members of the List: =20 I have a question regarding the "perceptual weighting filter" used in = the AMR-WB (also in the AMR-WB+) codec that is standardized in 3GPP and = ITU.=20 =20 Please check the 2002 Journal article from the developers of AMR-WB, = where they present the perceptual filter (pages 8-10, and Figures 3 and = 4). http://www.gel.usherbrooke.ca/audio/docs/IEEE2002_Bessette.pdf#search=3D%= 22perceptual%20weighting%20filter%20AMR%20WB%22=20 =20 Is this the best that one can achieve?=20 I would like to know if there are any recent research efforts made to = improve this perceptual weighting filter to improve the quality of = wideband speech. If so, any pointers in that direction will be highly = appreciated. =20 Thanks in advance. =20 Best Regards, ~Arijit ------_=_NextPart_001_01C6CAAB.2D7E595E Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; = charset=3Diso-8859-1">=0A= <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">=0A= <HTML>=0A= <HEAD>=0A= =0A= <META NAME=3D"Generator" CONTENT=3D"MS Exchange Server version = 6.5.7638.1">=0A= <TITLE>Re: AUDITORY Digest - 18 Aug 2006 to 23 Aug 2006 = (#2006-188)</TITLE>=0A= </HEAD>=0A= <BODY>=0A= <DIV id=3DidOWAReplyText21846 dir=3Dltr>=0A= <DIV dir=3Dltr>=0A= Dear =0A= Members of the List:<?xml:namespace prefix =3D o ns =3D =0A= "urn:schemas-microsoft-com:office:office" /><o:p></o:p>=0A=  <o:p></o:p>=0A= I have =0A= a question regarding the “perceptual weighting filter” used = in the AMR-WB (also =0A= in the AMR-WB+) codec that is standardized in 3GPP and ITU. =0A= <o:p></o:p>=0A=  <o:p></o:p>=0A= Please =0A= check the 2002 Journal article from the developers of AMR-WB, where they = present =0A= the perceptual filter (pages 8-10, and Figures 3 and = 4).<o:p></o:p>=0A= <A =0A= href=3D"http://www.gel.usherbrooke.ca/audio/docs/IEEE2002_Bessette.pdf#se= arch=3D%22perceptual%20weighting%20filter%20AMR%20WB%22">http://www.gel.u= sherbrooke.ca/audio/docs/IEEE2002_Bessette.pdf#search=3D%22perceptual%20w= eighting%20filter%20AMR%20WB%22</A> =0A= <o:p></o:p>=0A=  <o:p></o:p>=0A= Is =0A= this the best that one can achieve? <o:p></o:p>=0A= I would like =0A= to know if there are any recent research efforts made to improve this = perceptual =0A= weighting filter to improve the quality of wideband speech. If so, any = pointers =0A= in that direction will be highly appreciated.=0A=  =0A= Thanks =0A= in advance.=0A=  =0A= Best =0A= Regards,<o:p></o:p><SPAN lang=3DEN-US =0A= style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Verdana; mso-ansi-language: = EN-US; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: = EN-US; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt; = mso-bidi-font-family: 'Times New = Roman'">~Arijit</DIV></DIV>=0A= =0A= </BODY>=0A= </HTML> ------_=_NextPart_001_01C6CAAB.2D7E595E--

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Electrical Engineering Dept., Columbia University