[M4IF Technotes] GMC

[Yoshinori Suzuki]

Dear Rob and all,
Thank you for the comment.
> With all respect for that suggestion, it would pose interoperability
> problems, as it would amount to an external body defining its own Levels.
> (ISMA already sort of did that once, but then went to MPEG to ask to
> formalize this new definition, which becomes Level 3b for Advanced Simple)
> 
> If anyone, MPEG should fix its own levels (if there is indeed a problem)
> or create additional ones if fixes would create problems for existing
> products.

ISMA is just example, not generic.
My suggestion is not to add its own levels, that is to define 
the limitation for the current levels.
I think that 
1. the limitation on encoding defined by an assosiation does not 
   cause the prombles for existing products, and 
2. the limitation on decoder in the specific association does not
   cause the prombles, though such decoder could not decode all 
   standard bitstreams.
Of course, I also think that MPEG should create the new amendment 
if the reasonable request is raised.
Best regards,
Yoshinori Suzuki
Hitachi, Ltd.