Temporal processing for video coding technology

A decoder configured to decode a plurality of encoded streams into a reconstructed output video, the decoder configured to:

• receive a first output video, the first output video comprising an output of a base decoder applied to a base level encoded stream;
• receive one or more encoded streams;
• decode respective frames of the one or more encoded streams to derive respective sets of residuals, each frame of the respective frames being divided into a plurality of tiles and each tile of the plurality of tiles being divided into a plurality of blocks;
• and
• combine the sets of residuals with the first output video to generate the reconstructed output video,
• wherein, to decode respective frames, the decoder is configured to:
• obtain, for each block of the plurality of blocks, a preliminary set of residuals from the one or more encoded streams;
• derive a set of temporal predictions using a temporal buffer;
• and
• combine the set of temporal predictions with the preliminary set of residuals to output data for combination with the first output video;
• and
• wherein the decoder is configured to zero values of the set of temporal predictions:
• at a frame level, for at least one of the respective frames in response to receiving a first indication;
• at a tile level, for at least one of the plurality of tiles, in response to receiving a second indication;
• and at a block level, for at least one of the plurality of blocks, in response to receiving a third indication.

A method of decoding a plurality of encoded streams into a reconstructed output video, the method comprising:

• receiving a first output video, the first output video comprising an output of a base decoder applied to a base level encoded stream;
• receiving one or more encoded streams;
• decoding respective frames of the one or more encoded streams to derive respective sets of residuals, each frame of the respective frames being divided into a plurality of tiles and each tile of the plurality of tiles being divided into a plurality of blocks;
• and
• combining the set of residuals with the first output video to generate the reconstructed output video,
• wherein the decoding further comprises:
• obtaining, for each block of the plurality of blocks, a set of preliminary residuals from the one or more encoded streams;
• deriving a set of temporal predictions using a temporal buffer;
• and
• combining the set of temporal predictions with the set of preliminary residuals;
• and
• wherein the decoding comprises effecting the zeroing of the values of the set of temporal predictions:
• at a frame level, for at least one of the respective frames;
• at a tile level, for at least one of the plurality of tiles;
• and at a block level, for at least one of the plurality of blocks.

A bitstream comprising:

• a decoder configuration for controlling a decoding process of the bitstream;
• and
• a first output video, the first output video comprising an output of a base decoder applied to a base level encoded stream;
• one or more encoded streams comprising a plurality of frames, and wherein each frame of the respective frames is divided into a plurality of tiles and each tile of the plurality of tiles is divided into a plurality of blocks;
• wherein the one or more encoded streams further comprises a preliminary set of residuals;
• wherein the plurality of frames are configured to be decoded, by a decoder, on a per frame basis by deriving a set of temporal predictions using a temporal buffer and combining the set of temporal predictions with the preliminary set of residuals to output data for combination with the first output video to generate a reconstructed video output;
• wherein the bitstream further comprises:
• a first indication to indicate that the decoder should zero values of a set of temporal predictions at a frame level, for at least one of the respective frames
• a second indication to indicate that the decoder should zero values of a set of temporal predictions at a tile level, for at least one of the plurality of tiles;
• and
• a third indication to indicate that the decoder should zero values of a set of temporal predictions at a block level, for at least one of the plurality of blocks.