1. A method for decoding a video sequence comprising: (a) receiving said video sequence, (b) identifying a video parameter set syntax included in said video sequence; (c) identifying a video parameter set extension syntax included in said video parameter set syntax; (d) identifying, from said video parameter set extension syntax, representation formats, a number of said representation formats, indexes referencing said representation formats for each of a plurality of layers and a present flag indicating whether or not said indexes are present; and (e) decoding a plurality of frames of said video sequence by using said representation formats and said indexes.