[Mp4-tech] [video] - transform & quantization

[Tommaso fambau.it]

Hi,
i'm a student of university of Padua.
I've just started a study on the trasform and quantization designs in
H.264/AVC and there are some questions i'm not been able to answer also
searching on the net. I hope you would help me.
I start saying that i've based my studies on the IEEE TRANSACTIONS (july
2003) and in particular mode on the papers  "low-complexity transform and
quantization in h.264/avc"  and  "variable block size transform for
h.264/avc".
The questions are the next (i write a list to make it easier):
1- what's DYNAMIC RANGE of a block?
2- Are the TRANSFORM DC COEFFICIENTS simply the coefficients in the first
plece at the top-left of the block (so they are the continuous
coefficients)?
3- The standard describe the 4x4 and 8x8 transforms. How could the 2x2
blocks of DC coefficients of chrominance be trasformed (pag.601 if IEEE
TRANSACTIONS)??
4- What are the QUANTIZATION TABLES? Could i find them some where?
5- On the paper "low-complexity..." pag.602, is written: "The basis
function of the new transform do not have equal norm, which leads to an
increade in the size of quantization tables". why this increase?? i can't
understand!
6- On the paper "variable..." pag.605, the 8x8 transform matrix is shown,
and is written that is a SINGLE NORM matrix. From my calculations on the
rows i found it isn't so. Where is my mistake??
I hope i've been clear and i excuse me for so much questions.
thanks.
Tommaso Baù