[Mp4-tech] Regarding Luma16DC and Luma16AC

[Ramya Desai]

Hi all,
Currently I am trying to understand JM software for my project.
While doing so, I observed the following things.
1)
For some Macro blocks I am getting Luma, ChromaDc and ChromaAC coefficients.
For other Macro blocks, I am getting Luma16DC, Luma16AC and Chroma.
What is difference of these coefficients? And how to stop Luma16DC and
Luma16AC coefficients?
2)
I am not getting all the 16, 4x4 blocks for my CAVLC (Depending on CBP value).
In this case, what values shall I take for nA and nB in the
calculation of nC in "TrailingOnes" and "Total Coeffs" in lookup
table.
Thanks in Advance,
Regards,
RD