[Mp4-tech] H.264/decoder/Baseline profile/doubts

[Thammi_Reddy]

Dear experts, I have following doubts in H.264 decoder baseline profile.
Please answer these questions. Thanks in advance.
1. Ref: chapter 7.3 of the spec.
frame_num, pic_order_cnt_lsb syntax elements are marked with descriptor are
given as u(v).  So the number of bits taken by these syntax elements vary
from current slice header and next slice header depending on the magnitude
of the  actual values sent by the encoder. 
If this is true how do I know the LSB if data transfer is MSB to LSB?
2. In sequence parameter set RBSP frame_mbs_only_flag=0 for baseline profile
as only frames and no fields are allowed. 
Do I still receive this flag or encoder will not send it at all?
On the similar lines do I receuve pic_init_qs_minus26 even for baseline
profile? In general some syntax elements are not received OR all are
received but I have to drop?
3. What is the importance of CATEGORY of the syntax elements provided in
chapter 7.3(syntax in tabular form)? Please explain. 
4. If the values are fixed as per the annexure A to  
If incorrect values are received for baseline profile (e.g. receive
entropy_coding_mode_flag =1, slice_type != (0 OR 2 OR 5 OR 7 )...   etc)
what processing I have to do? From which stage I have to resume in this
case?
Regards,
Thammi Reddy
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