https://wiki.hydrogenaud.io/index.php?title=Filterbank&feed=atom&action=history
Filterbank - Revision history
2024-03-29T05:57:04Z
Revision history for this page on the wiki
MediaWiki 1.22.7
https://wiki.hydrogenaud.io/index.php?title=Filterbank&diff=23297&oldid=prev
Mjb: on 2nd thought, not mp3 specific enough
2012-09-12T02:20:46Z
<p>on 2nd thought, not mp3 specific enough</p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 02:20, 12 September 2012</td>
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Mjb
https://wiki.hydrogenaud.io/index.php?title=Filterbank&diff=23283&oldid=prev
Mjb: related to MP3 encoding
2012-09-12T02:05:58Z
<p>related to MP3 encoding</p>
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Mjb
https://wiki.hydrogenaud.io/index.php?title=Filterbank&diff=13289&oldid=prev
Pepoluan: fix bandpass link, add link to quantization, category
2006-09-08T22:46:56Z
<p>fix bandpass link, add link to quantization, category</p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 22:46, 8 September 2006</td>
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<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Filterbank as used in all mpeg1 layers encoding and [[MPC]] encoding (polyphase analysis filterbank), is a set of [[<del class="diffchange diffchange-inline">bandpass|</del>bandpass filter]], which divide the audio signal into 32 equal-width [[frequency]] [[subband]]. So, with cd-audio's 22.05kHz [[bandwidth]], the width of 1 [[subband]] is about 689Hz (32*689Hz=22.05kHz). Filterbank and its inverse are not lossless transformations. Even without quantization, the inverse transformation cannot perfectly recover the original signal. Filterbank is designed so, that the error introduced is small and inaudible.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Filterbank as used in all mpeg1 layers encoding and [[MPC]] encoding (polyphase analysis filterbank), is a set of [[bandpass filter]], which divide the audio signal into 32 equal-width [[frequency]] [[subband]]. So, with cd-audio's 22.05kHz [[bandwidth]], the width of 1 [[subband]] is about 689Hz (32*689Hz=22.05kHz). Filterbank and its inverse are not lossless transformations. Even without <ins class="diffchange diffchange-inline">[[</ins>quantization<ins class="diffchange diffchange-inline">]]</ins>, the inverse transformation cannot perfectly recover the original signal. Filterbank is designed so, that the error introduced is small and inaudible.</div></td></tr>
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Pepoluan
https://wiki.hydrogenaud.io/index.php?title=Filterbank&diff=7978&oldid=prev
Jan at 11:49, 22 March 2005
2005-03-22T11:49:58Z
<p></p>
<p><b>New page</b></p><div>Filterbank as used in all mpeg1 layers encoding and [[MPC]] encoding (polyphase analysis filterbank), is a set of [[bandpass|bandpass filter]], which divide the audio signal into 32 equal-width [[frequency]] [[subband]]. So, with cd-audio's 22.05kHz [[bandwidth]], the width of 1 [[subband]] is about 689Hz (32*689Hz=22.05kHz). Filterbank and its inverse are not lossless transformations. Even without quantization, the inverse transformation cannot perfectly recover the original signal. Filterbank is designed so, that the error introduced is small and inaudible.</div>
Jan