5.7.2 25 Hz H.264/AVC HDTV IRD and Bitstream
This clause specifies the 25 Hz H.264/AVC HDTV IRD and Bitstream. All specifications in clauses 5.5 and 5.7.1 shall apply. The specification in the remainder of this clause only applies to the 25 Hz H.264/AVC HDTV IRD and Bitstream.
5.7.2.1 Profile and level
Encoding: 25 Hz H.264/AVC HDTV Bitstreams shall comply with the High Profile Level 4 restrictions, as specified in ITU-T Recommendation H.264 / ISO/IEC 14496-10 [16].
The value of level_idc shall be equal to 30, 31, 32, or 40.
Decoding: 25 Hz H.264/AVC HDTV IRDs shall support the decoding of High Profile Level 4 bitstreams. This requirement includes support for High Profile and levels 3 to 4. Support for profiles and levels other than High Profile, Level 3 to 4 is optional. If the 25 Hz H.264/AVC HDTV IRD encounters an extension which it cannot decode, it shall discard the following data until the next start code prefix (to allow backward compatible extensions to be added in the future).