Such as video coder or video decoder equal video coding device may by arranged for coding at the decoding the first access unit and AU unit DU and by coding image CPB of the second buffer DU removing the lasting time between timing wherein the second DU according to the sequence after decoding in the first DU and the first and DU and at the same AU. The video coding device may further at least based on said coding duration determining by removing time of the DU. The coding device can also coding the first DU phase and the relevant sub image time series supplemental enhancement information SEI information. The video coding device may further at least part said sub image based on time series SEI information for confirming removal time of the DU.

A video coding device such as a video encoder or a video decoder may be configured to code a duration between coded picture buffer (CPB) removal time of a first decoding unit (DU) in an access unit (AU) and a second DU wherein the second DU is subsequent to the first DU in decoding order and in the same AU as the first DU. The video coding device may further determine a removal time of the DU based at least on the coded duration. The coding device may also code a sub-picture timing supplemental enhancement information (SEI) message associated with the first DU. The video coding device may further determine a removal time of the DU based at least in part on the sub-picture timing SEI message.