A system for decoding a video bitstream that includes a base bitstream and enhancement bitstreams is disclosed. The system receives a video parameter set and a video parameter set extension, where the video parameter set extension includes decoder picture buffer parameters. In one embodiment, a method for decoding a video sequence is disclosed. The method comprises: (a) receiving said video sequence; (b) determining the number of an output layer set for said video sequence; (c) determining a maximum number of sub-layers minus one for at least one of said at least one output layer set; (d) decoding a characteristic of a decoded picture buffer for a sub layer of one of said at least one output layer set.