[Mp4-tech] CAVLC questions

[Tomislav Muic]

 am writing H264 encoder so I have a few questions about CAVLC
/************
- The variables blkA and blkB are derived as follows.
- If the CAVLC parsing process is invoked for Intra16x16DCLevel,
Intra16x16ACLevel, or LumaLevel, the
process specified in subclause 6.4.8.3 is invoked with luma4x4BlkIdx
as the input, and the output is
assigned to mbAddrA, mbAddrB, luma4x4BlkIdxA, and luma4x4BlkIdxB. The
4x4 luma block specified
by mbAddrA\luma4x4BlkIdxA is assigned to blkA, and the 4x4 luma block
specified by
mbAddrB\luma4x4BlkIdxB is assigned to blkB.
- Otherwise (the CAVLC parsing process is invoked for ChromaACLevel),
the process specified in
subclause 6.4.8.4 is invoked with chroma4x4BlkIdx as input, and the
output is assigned to mbAddrA,
mbAddrB, chroma4x4BlkIdxA, and chroma4x4BlkIdxB. The 4x4 chroma block
specified by
mbAddrA\iCbCr\chroma4x4BlkIdxA is assigned to blkA, and the 4x4 chroma
block specified by
mbAddrB\iCbCr\chroma4x4BlkIdxB is assigned to blkB
*****************************/
I am using Intra 16x16 prediction
so NUMVLC table is  selected from nr, of coefficients of 4x4 block
from macroblock to the left/up and one 4x4 position left/up to to the
position of 4x4 block being decoded?
what if it is left/up most 4x4 block?
if suffixL is 0 and it is increased to 1, is it still checked for
magnitude and increased furhter in same step?
when sending ac coefficients I send only those 15 without DC, or I
send 16 with DC equal to 0?
-- 
Tomislav Muić