Implementation efficient partition-based intra coding concept

An apparatus for decoding a block of a picture, the apparatus comprising at least one processor configured to:

• decode, from a data stream, an intra-coding mode for the block;
• determine, based on a size of the block and partitioning information, that the block is partitioned into a plurality of transform partitions along a partition dimension;
• determine, based on the size of the block, that the block is represented by a plurality of prediction partitions;
• identify that a subset of the plurality of transform partitions corresponds to one prediction partition of the plurality of prediction partitions;
• derive a prediction for the one prediction partition using the intra-coding mode;
• after deriving the prediction for the one prediction partition, derive a prediction residual corresponding to a first transform partition of the subset of the transform partitions;
• and
• reconstruct a portion of the block corresponding to the first transform partition using a portion of the derived prediction of the one prediction partition and the prediction residual.

A non-transitory computer readable medium containing instructions for decoding a block of a picture, the instructions when executed cause at least one processor to:

• decode, from a data stream, an intra-coding mode for the block;
• determine, based on a size of the block and partitioning information, that the block is partitioned into a plurality of transform partitions along a partition dimension;
• determine, based on the size of the block, that the block is represented by a plurality of prediction partitions;
• identify that a subset of the plurality of transform partitions corresponds to one prediction partition of the plurality of prediction partitions;
• derive a prediction for the one prediction partition using the intra-coding mode;
• after deriving the prediction for the one prediction partition, derive a prediction residual corresponding to a first transform partition of the subset of the transform partitions;
• and
• reconstruct a portion of the block corresponding to the first transform partition using a portion of the derived prediction of the one prediction partition and the prediction residual.