EP3471419

[0001] The disclosure relates to gradual temporal layer access (GTLA) pictures in video compression. The GTLA picture may include a temporal identifier. A subsequent picture that is encoded after the GTLA picture, having a temporal identifier equal to the temporal identifier of the GTLA picture may not use a previous picture for inter prediction that has a temporal identifier GREATER or EQUAL to the temporal identifier of the GTLA picture and that precedes the GTLA picture in decoding order. A subsequent picture in decoding order that is encoded after the GTLA picture, having a temporal identifier equal to the temporal identifier of the GTLA picture may use a previous picture for inter prediction that has a temporal identifier LESS than the temporal identifier of the GTLA picture and that precedes the GTLA picture in decoding order.