900 Club - QQ All-Star
- Jul 5, 2010
A QS decode of the Scheiber encode should have only very minor (probably inaudible) differences:https://worldradiohistory.com/Archive-Electronics-World/70s/1970/Electronics-World-1970-09.pdf#page=39 ^^^ ...with the Scheiber circuits in and out of the chain, we found a remarkable similarity to the straight - through 4-channel program. However, we were told that, even in the worst case when...www.quadraphonicquad.com
The Scheiber matrix is QS matrix like, but without 90 degree phase shifts, it should be easier to implement in software (or with a mixing board and some phase reversals) than QS.
I haven't worked thru the math of Scheiber encode/QS decode, but it seems like it would be almost indistinguishable from QS encode/decode.
As with QS, the Scheiber matrix could also be decoded with Dolby Pro-Logic decoder(s) and the simple DynaQuad speaker matrix.
- The phases of the back channels are 90 deg different with QS than they are with Scheiber.
- The back channels are in phase with each other in QS. They are in opposite phase with Scheiber decode.
The only difference between the Scheiber decode and the EV-4 decode is the parameter values.
The above can decode Scheiber, QS, EV-4, Dynaquad, and Dolby Surround.
Here are some other ideas: