[M4IF Technotes] Simple Profile Quantisation

[Kris Huber]

Hello Rob Beattie,
There are four of the simple profile bitstreams from ISO (ge-8, ge-18,
ge-23, and ge-24) that are also not decodable by a simple profile decoder.
This has been mentioned on MPEG e-mail reflectors, but to my knowledge
nobody has yet followed through on fixing it (myself included-sorry!).  I
think it simply "fell through the cracks," so to speak, not being of high
enough priority for anyone.  There could now be some confusion about simple
profile tools resulting from these erroneous "simple profile" conformance
bitstreams.  The profile tables in the visual spec clearly indicate that
simple profile does not include method 1 quantization.  Advanced simple
profile does include it, along with several other tools of greater
complexity.
Regards,
Kris Huber