[M4IF Technotes] Macroblock stuffing and short headers

[dsearles]

Conformance test stream hit037 is a short headers stream, with
macroblock stuffing (derived_mb_type == "stuffing").
The macroblock() syntax allows derived_mb_type == "stuffing"
regardless of short header,  but macroblock() is effectively iterated
over during short header parsing. The Momusys decoder doesn't
handle this stream, but I believe MS does.
The H263 spec does say that the bits should be discarded... maybe
that operation was missed during the writing of macroblock() in
MPEG-4?
-- 
Dan Searles
Atmel Multimedia & Communications
3800 Gateway Centre, Suite 311
Morrisville, NC 27560
phone: (919)462-6553 fax: (919)462-0300