Hello David, You can think about it intuitively...
Broadband de-noising is a frequency dependent gating and/or gain reduction process. In B-format, if you gate out one of the channels, you get a substantial change in imaging. E.g., if you gate out Y, you loose 'width'. In A-format, you're gating out a segment (I think in terms of pie slices) of the soundfield. E.g., gate out Front-Left-Up. Here, you also have imaging distortion effects, but, they're similar to what happens in stereo. E.g., gate out Left. Make sense? Now... there may be an argument as to whether you want any image distortion to happen... de-noising is about throwing (or suppressing) stuff away. My best, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Joseph Anderson j.ander...@ambisonictoolkit.net http://www.ambisonictoolkit.net ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ On 5 Aug 2014, at 3:52 pm, David Pickett <d...@fugato.com> wrote: > At 20:56 05-08-14, Joseph Anderson wrote: > > >I'd advise converting from B-format to A-format, then doing all > >de-noising, compression, etc, in A-format. Followed by, re-encoding > >back to B-format. > > What's the theory that predicts that the results will be any different than > doing it on B-format, given that the transform is a linear matrix? > > David > > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit > account or options, view archives and so on. -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20140806/592a191e/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
