[Mp4-tech] About "Slices in h.264".......

[atul tomar]

Hi All,
Please give your comments so that I could calrify my doubts.
(1) In JM Ref software I find infromation given below in "Error Resilience / Slices" settings.
SliceMode  =  0   # Slice mode (0=off 1=fixed #mb in slice 2=fixed #bytes in slice 3=use callback 4=FMO)
Could anyone please locate me where this SliceMode is defined in H.264 standard. I do not find header of this sort of. Do we need to send this parameter to decoder.
(2) What is the difference if MBs are grouped in Slices while using ASO and while not using ASO.
Correct me if I am wrong: only difference is that, in case of ASO slices can be send/received in any order but while not using ASO it should be send/received in a order from begin to end.
MBs in both cases are assigned contingously from a frame. 
(3) Do we need to send number of MBs in each slice to decoder?? If not, How we come to know about last MB in a slice?
I know that we send first_mb_addr in each slice.
I would appreciate your help.
Lot of Thanks in advance.
With warm regards,
Atul
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