[Mp4-tech] [H.264] Inverse 4x4 transform and the 1-D transform order

[Ronny Pedersen]

Hi,
The H.264 specification states that first each column of the 4x4
block should be processed with a 1-d inverse transform and then the
rows should be processed with the same inverse transformations, but
as I can see it the H.264/AVC reference decoder processes rows and columns
in the opposite order.
I guess this will make a difference in the result since the 1-d transforms
performes a left shift (divide by two) on two of the input coefficients?
What is the correct order in which to apply the 1-d  inverse transforms to
the 4x4 block?
Regards,
Ronny