"Richard" <zoanne...@yahoo.co.uk> wrote: ... > Now, i was wondering if anyone here knows the difference between the BBC's > Matrix H and the (short lived) replacement Matrix HJ, and of course, it's > decoding equation? > > The reason for asking is because Nimbus actually released a couple of LP's > using it, and i may well have access to one of them (so that's QS, H and HJ > they used before going UHJ)
Eero Aro <eero....@dlc.fi> wrote: > The HJ decoding equation is in the Motherlode: > > http://decoy.iki.fi/dsound/ambisonic/motherlode/source/Encoding%20standards%20for%20NRDC%20Universal%20HJ%201977.pdf Be aware that the BBC/NRDC System HJ was defined as a set of tolerance zones; these are illustrated in Figure 1 (page 4) of the paper Sampo indicated. My recollection is that the zones were wide enough to include both the BBC Matrix H and the NRDC System 45J (which was a progenitor of Ambisonic UHJ). This makes decoding problematic. Elsewhere in the same paper decoders for Ambisonic UHJ are described, so I would decode System HJ using that. Regards, Martin -- Martin J Leese E-mail: martin.leese stanfordalumni.org Web: http://members.tripod.com/martin_leese/ _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
