New profiles on USAC and HE-AAC V3 were proposed. Since these profile proposals included existing profiles from other MPEG audio standards, they propose a potential problem. So far, MPEG has only used MAFs to combine technologies from different standards. A potential policy that MPEG has followed so far without explicitly stating it, is to limit profiles to tools defined within the standard of the profile.
MPEG-H
The use of SVC is picking up in industry. It is expected that a scalable extension of HEVC would also be desirable. When SVC was standardized, some participants felt that a number of definitions within AVC were such that integration of the scalable extension was cumbersome in part. Therefore, an overlapping development of the current HEVC standard and its scalable extension might be desirable.
