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Nordenstam · 24th January 2010

From the link:

I reckon this is the same as the same layout as the MH soft acoustic generator gives, which again is ripped from this BBC research repport: http://downloads.bbc.co.uk/rd/pubs/reports/1990-15.pdf

Had to read a bit to find what on earth they had been thinking, since the pattern is neither an obvious QRD nor PRD. Turns out the 12x12 grid consists of several smaller units!

It seems reasonable to assume that better performance can be had by building a proper 13x12 PRD sequence. Check this: Calculate a Two-Dimensional Primitive Root Diffuser (Skyline)

If the end results absolutely have to be square, one of the sides can be made slightly smaller so the 13x12 array ends up square. In most situations, strict conformity to square units is not needed.

24th January 2010	#6
Nordenstam Lives for gear Joined: Aug 2005 Location: Norway Posts: 1,741	From the link: I reckon this is the same as the same layout as the MH soft acoustic generator gives, which again is ripped from this BBC research repport: http://downloads.bbc.co.uk/rd/pubs/reports/1990-15.pdf Had to read a bit to find what on earth they had been thinking, since the pattern is neither an obvious QRD nor PRD. Turns out the 12x12 grid consists of several smaller units! It seems reasonable to assume that better performance can be had by building a proper 13x12 PRD sequence. Check this: Calculate a Two-Dimensional Primitive Root Diffuser (Skyline) If the end results absolutely have to be square, one of the sides can be made slightly smaller so the 13x12 array ends up square. In most situations, strict conformity to square units is not needed.