[vorbis-dev] A masking test program

Gregory Maxwell greg at linuxpower.cx
Mon Jan 8 10:38:05 PST 2001

On Mon, Jan 08, 2001 at 07:31:24PM +0100, Robert Voigt wrote:
> I quote from the todo list:
> - Determine what combinations of frequencies and amplitudes should be
> testet and what resolution should be used. At the moment all possible
> combinations are tested at a luxurious resolution. The whole thing would take about
> 160 hours this way.
> We can make assumptions about where no masking can occur, and don't test
> these portions of the curves at all. It's just a question of making correct
> (!) assumptions and implementing it in the program.
> That way and by losing resolution in the curves we could go down to say
> 10-20 hours. Then we can still divide the whole thing into 4 independend
> programs, separetely downloadable. That is masking between:
> tone-tone
> tone-noise
> noise-tone
> noise-noise.
> That makes 3-5 hours for each. Haven't calculated, just a guess. 

How about we do all four tests at low resolution (like 6 tests across the
whole spectrum), then compair the results to our current expectations,
focusing in on the areas that disagree with our current knoweldge the most.

We can't expect too many people to put int 20hours of listening tests, but
some will. It's much more reasonable to expect an hour or so out of a great
number of people, we need to find the best way to make that hour count.

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