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christopoulos
2009 Oct 12
0
Non linear fitting of 2 distributions with shared parameters
...experimental
distributions. I use nls() to the fit the 2 distribution and it works
pretty well.
The statistical comparison of 2 non linear fits is well described in
the book "Fitting Models to Biological Data using Linear and Nonlinear
Regression" from Harvey Motulsky and Arthur Christopoulos.
This test is based on the calculation of an F-value that compares the
residuals of
1°) the global fit of both data sets (with one value for each
parameter) on one hand,
2°) with the 2 fits of each separate data sets (with thus 2 values for
each parameter) on the other hand.
This methods all...
2007 Aug 29
1
Fast quality reduction transcoding
Hi,
After a quick read of the Theora spec, I became curious about the
possibility of fast quality reduction of Theora videos. The idea is to
decode through the Huffman and reverse prediction steps, and then to
truncate the coefficients and reencode. My questions are:
* Is this a reasonable way to reduce the quality and bitrate of a
stream? Will it be comparable in quality to a complete