Patent ID: 9749644
Date: 2017-08-29
CPC Classifications: H04N

Claim:
1. A method to be performed by a video encoder for encoding a current picture belonging to a temporal level identified by a temporal_id, the method comprises: determining a Reference Picture Set, RPS, for the current picture indicating reference pictures that are kept in a decoded picture buffer, DPB, when decoding the current picture, and when the current picture is a temporal switching point, and ensuring that the RPS of the current picture includes no picture having a temporal_id greater than or equal to the temporal_id of the current picture, wherein the current picture, being a temporal switching point, is a temporal sub-layer access, TSA, picture, the TSA picture and all coded pictures with temporal_id greater than or equal to the temporal_id of the TSA picture that follow the TSA picture in decoding order shall not include any picture in their reference picture set that precedes the TSA picture in decoding order and for which temporal_id is greater than or equal to the temporal_id of the TSA picture.