Hi David, These upmixing methods extract a lot of information from the FOA recording that is then re-used to essentially “synthesize" the HOA signals, with a spatial resolution that would not be possible with the FOA recordings. They are “active” in that sense, and signal-dependent, compared to the “passive" classical ambisonic decoding. Their success depends of course on how effective is their underlying model and how robustly they are implemented.
In that sense there isn’t necessarily a large benefit in parametric upmixing from FOA to 3rd-order, compared to parametric decoding for playback, since these methods can also upmix directly from FOA to, say, 40 speakers or headphones, with their maximum sharpness. However, the HOA upmixing could be useful for people that are working with a HOA processing pipeline, and they want to integrate FOA or lower-order material seamlessly. Regards, Archontis Politis > On 22 Feb 2019, at 19:45, David Pickett <d...@fugato.com> wrote: > > At 02:37 22-02-19, Wilson Lim wrote: > >> ot sure if I have missed a discussion about upmixing with ambisonics on >> Sursound. >> >> Just wondering if anyone is willing to share some information on how to >> implement upmixing algorithms from 1st Order Ambisonics A&B-format to 3rd >> Order Ambisonics B-format. > > I am curious to know what advantage there is to playing back 1st order > upmixed to 3rd order. Doesnt it still sound like 1st order, since there no > information is actually added? Or are the images expectated to be more stable > on account of more loudspeakers being involved, on the analogy of stereo > played back through three loudpeakers? > > 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. _______________________________________________ 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.
