Implementation Efficient Partition Based Intra Coding Concept

Abstract: A decoder for block-based decoding of a picture from a data stream, configured to decode for a predetermined block of the picture an intra-coding mode and a partition dimension flag and set a partition dimension depending on the partition dimension flag to be horizontal or vertical. The decoder is configured to partition, along the predetermined dimension, the predetermined block into transform partitions which are as wide as the predetermined block perpendicular to predetermined dimension. Furthermore the decoder is configured to decode, for each transform partition, a transform of a prediction residual; intra-predicting the predetermined block depending on one or more already reconstructed samples neighboring the predetermined block in a manner depending on the intra-coding mode to obtain a predictor for the predetermined block; and reconstructing the predetermined block by correcting the predictor within each transform partition using the transform of the prediction residual decoded for the respective transform partition.

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