Dependent random access point pictures in HEVC

This paper describes the concept and a number of system aspects for the Dependent Random Access Point (DRAP) picture, a new feature that was recently introduced in the High-Efficiency Video Coding (HEVC) standard. A DRAP picture is an inter-coded picture that may only reference the previous Intra Random Access Point (IRAP) picture and provides a random access point in the bitstream at the DRAP picture given that the IRAP picture is available. The DRAP picture is indicated in the HEVC bitstream by a supplementary enhancement indication (SEI) message. DRAP pictures could increase coding efficiency for random access configured bitstreams for video services like adaptive video streaming, video conferencing, and may also provide faster channel switching for broadcasted TV for a certain bitrate.