Hi Gerry,
I'm not sure that I understand your question correctly but I can share the following information about the MPEG-4 Simple Profile (SP) level:
The MPEG-4 Part 2 (formally ISO/IEC 14496-2) has approximately 21 profiles, including profiles called Simple, Advanced Simple, Main, Core, Advanced Coding Efficiency, Advanced Real Time Simple, etc. The most commonly deployed profiles are Advanced Simple and Simple, which is a subset of Advanced Simple.
Simple Profile is mostly aimed for use in situations where low bit rate and low resolution are mandated by other conditions of the applications, like network bandwidth, device size etc. Examples are mobile phones, some low end video conferencing systems etc.
BR
Tsvetolin Shulev