Video coding with guided separate post-processing steps

An apparatus for video decoding,

• wherein the apparatus is configured to receive a video data stream having pictures of a video encoded thereinto,
• wherein the video data stream comprises a plurality of access units (AU), a plurality of SEI (supplemental enhancement information) messages and processing order information which defines a processing order of the plurality of SEI messages,
• wherein the apparatus is configured to determine the processing order information to obtain information on the processing order of the plurality of SEI messages,
• wherein the processing order information comprises an indicator (po_sei_prefix_flag[i]) indicating at least one of:
• if an associated SEI message of the plurality of SEI messages is identified by a portion of bytes or by a portion of bits of the associated SEI message,
• if the plurality of SEI messages is identified by another unique identifier,
• wherein the apparatus is configured to analyze said indicator,
• wherein the apparatus is configured to:
• decode a current AU using inter-picture prediction from a referenced reference picture stored in a decoded picture buffer (DPB) to acquire a decoded picture, and to insert the decoded picture into the DPB,
• assign to each reference picture stored in the DPB a classification as one of a short-term reference picture, a long-term reference picture and an unused-for-reference picture,
• read DPB mode information from the current AU,
• if the DPB mode information indicates a first mode, remove one or more reference pictures classified as a short-term picture, according to a first-in-first-out (FIFO) strategy, from the DPB,
• if the DPB mode information indicates a second mode, read memory management control information comprising at least one command in the current AU and process the at least one command so as to change the classification assigned to at least one of the reference pictures stored in the DPB, and use the classification of the reference pictures in the DPB, for managing reference picture removal from the DPB.

An apparatus for video decoding,

• wherein the apparatus is configured to receive a video data stream having pictures of a video encoded thereinto,
• wherein the video data stream comprises a plurality of access units (AU), a plurality of SEI (supplemental enhancement information) messages and processing order information which defines a processing order of the plurality of SEI messages,
• wherein the apparatus is configured to determine the processing order information to obtain information on the processing order of the plurality of SEI messages,
• wherein the processing order information comprises subset information indicating a subset of bytes or a subset of bits of an SEI message of the plurality of SEI messages,
• wherein the processing order information comprises portion information which portions of the subset of bytes or of the subset of bits are used to identify the SEI message,
• wherein the apparatus is configured to analyze the subset information and the portion information,
• wherein the apparatus is configured to:
• decode a current AU using inter-picture prediction from a referenced reference picture stored in a decoded picture buffer (DPB) to acquire a decoded picture, and to insert the decoded picture into the DPB,
• assign to each reference picture stored in the DPB a classification as one of a short-term reference picture, a long-term reference picture and an unused-for-reference picture,
• read DPB mode information from the current AU,
• if the DPB mode information indicates a first mode, remove one or more reference pictures classified as a short-term picture, according to a first-in-first-out (FIFO) strategy, from the DPB,
• if the DPB mode information indicates a second mode, read memory management control information comprising at least one command in the current AU and process the at least one command so as to change the classification assigned to at least one of the reference pictures stored in the DPB, and use the classification of the reference pictures in the DPB, for managing reference picture removal from the DPB.

An apparatus for video decoding,

• wherein the apparatus is configured to receive a video data stream having pictures of a video encoded thereinto,
• wherein the video data stream comprises a plurality of access units (AU), a plurality of SEI (supplemental enhancement information) messages and processing order information which defines a processing order of the plurality of SEI messages,
• wherein the apparatus is configured to determine the processing order information to obtain information on the processing order of the plurality of SEI messages,
• wherein the video data stream comprises information on a group of filters or comprises one or more references to the information on the group of filters,
• wherein the apparatus is configured to apply one or more or all of the group of filters using the information on the group of filters,
• wherein the apparatus is configured to:
• decode a current AU using inter-picture prediction from a referenced reference picture stored in a decoded picture buffer (DPB) to acquire a decoded picture, and to insert the decoded picture into the DPB,
• assign to each reference picture stored in the DPB a classification as one of a short-term reference picture, a long-term reference picture and an unused-for-reference picture,
• read DPB mode information from the current AU,
• if the DPB mode information indicates a first mode, remove one or more reference pictures classified as a short-term picture, according to a first-in-first-out (FIFO) strategy, from the DPB,
• if the DPB mode information indicates a second mode, read memory management control information comprising at least one command in the current AU and process the at least one command so as to change the classification assigned to at least one of the reference pictures stored in the DPB, and use the classification of the reference pictures in the DPB, for managing reference picture removal from the DPB.