http://www.aes.org/forum/?ID=181 Copyright 2013 Audio Engineering Society Inc. All rights reserved. AES Journal Forum: Comment on "Watermark-Aided Pre-Echo Reduction in Low Bit-Rate Audio Coding" en-us Tue, 21 May 2013 09:30:56 -0600 Wed, 15 Aug 2012 13:38:59 -0600 AES Webmaster http://cyber.law.harvard.edu/rss/rss.html https://secure.aes.org/forum/pubs/journal/?ID=181#1102 Title: Watermark-Aided Pre-Echo Reduction in Low Bit-Rate Audio Coding<br/>JAES Volume 60 Issue 6 pp. 431-443; June 2012<br/>Comment by: Arijit Biswas<br/><br/><p><!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG /> </o:OfficeDocumentSettings> </xml><![endif]--><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves /> <w:TrackFormatting /> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning /> <w:ValidateAgainstSchemas /> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF /> <w:LidThemeOther>DE</w:LidThemeOther> 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<![endif]--></p> <p>Very interesting paper and it was very nice to read.<br /> <br /> However, I&rsquo;ve got one question/comment:<br /> Authors mention that &ldquo;ARMA model is used to estimate the temporal envelope&rdquo;.</p> <p><br /> I agree with the authors that ARMA model is efficient, but how does the authors guarantee stability of the ARMA model? I&rsquo;m concerned because ARMA modeling using Prony&rsquo;s Method is not guaranteed to be stable. See this link: <a href="http://www.mathworks.co.uk/help/toolbox/signal/ug/f11-7042.html">http://www.mathworks.co.uk/help/toolbox/signal/ug/f11-7042.html</a> <br /> In case you have some references or used some techniques to guarantee the stability of the ARMA modeling using Prony (or any other method), I would be very interested to know. <br /> <br /> Best Regards,<br /> Arijit</p><br/> AES Journal Forum Wed, 15 Aug 2012 13:38:59 -0600 https://secure.aes.org/forum/pubs/journal/?ID=181#1102