[M4IF Technotes] aspect ratio info

[sadaf]

Sir,
This is in reference to your question put up on mpeg4 Technotes mailing
list, relating to pixel aspect ratios used in MPEG-4 Visual on feb22, 2002.
Since I am new in mpeg4 world, and i am trying to parse the video object
layer bitwise.
Can you tell me the exact value of "extended_par"? As far as i know its a 4
bit field and when parsing video object layer, a condition comes when aspect
ratio info is checked to be equal to extended_par.
I am not quite sure about the valid value of extended_par field. Can you
help me out. I will be very grateful
thanx in advance...