On 6 Mar 2012, at 17:00, [email protected] wrote: > > Message: 6 > Date: Tue, 6 Mar 2012 04:03:47 +0200 (EET) > From: Sampo Syreeni <[email protected]> > Subject: Re: [Sursound] Me again - on the H/HJ hunt > To: Surround Sound discussion group <[email protected]> > Message-ID: <[email protected]> > Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed > > On 2012-01-25, Paul Hodges wrote: > >> And given that HJ was defined to include within its tolerance zones >> both H and 45J, they could by definition have simply continued using >> existing H equipment and labelling the results HJ.
no, 45J predated UHJ. H would not fit inside the HJ tolerance zone. The ambisonic part of UHJ, as opposed to the pairwise referenced HJ used by the BBC, was and is 35JA' UHJ was/is not a tolerance zone. > > Yes. And that is one of the funkiest things about ambisonic > compatibility codings: you can't say there is just one codec. No, there > are encoders and decoders, separately. Because analog electronics > compatibility not only allows, but sometimes requires that sort of > thing. > > I believe we should implicitly talk about precise encoders, here. > Because there is precisely one optimum way to decode what they produce, > evenwhile, say, UHJ allows a rather broad decoding band over the > Scheiber sphere. DEcoding? How do you described decoding on a Scheiber sphere? If you mean encoding then BHJ has a precise single definition on the energy sphere, 5 parameters define the locus. > > (Mind you, it was perhaps the first system in existence to explicitly > define itself through a decoder, and a one which wasn't perfectly well > defined either. Nowadays every digital codec defines itself that way, if > usually in a way which doesn't tolerate errors... ;) > - NO, it is precisely defined by the ENcoder, not the decoder. The kernel (or equivalent B-format) encoding of UHJ was precisely and unambiguously defined. Geoffrey -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20120306/6dc77cb4/attachment.html> _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
