Decoder configured to decode a bitstream signaling one of supported partitioning patterns for a current block of a picture, the decoder being configured to subdivide the picture into coding blocks according to subdivision information contained in the bitstream by applying multi-tree subdivisioning to the picture, the coding blocks including the current block, and if the signaled one of the supported partitioning patterns specifies a subdivision of the current block into two or more block partitions (50, 60), for each of the block partitions except a first block partition of the bock partitions of the current block in a coding order, determine, for the respective block partition of the current block, a set of coding parameter candidates, wherein at least some coding parameters candidates are adopted from the coding parameters of merely one previously decoded block partition so that the at least some coding parameter candidates are equal to the coding parameters of said merely one previously decoded block partition, and remove from the set of coding parameter candidates for the respective block partition, any coding parameter candidate adopted from any block partition, which would, when being merged with the respective block partition, result in one of the supported partitioning patterns, characterized in that the determination of the set of coding parameter candidates of the respective block partition of the current block further comprises deriving at least some further coding parameter candidates from a combination of coding parameters of more than one previously decoded block partitions, or from - by modification - coding parameters of one previously decoded partition. subdivide the picture into coding blocks according to subdivision information contained in the bitstream by applying multi-tree subdivisioning to the picture, the coding blocks including the current block, and if the signaled one of the supported partitioning patterns specifies a subdivision of the current block into two or more block partitions (50, 60), for each of the block partitions except a first block partition of the bock partitions of the current block in a coding order, determine, for the respective block partition of the current block, a set of coding parameter candidates, wherein at least some coding parameters candidates are adopted from the coding parameters of merely one previously decoded block partition so that the at least some coding parameter candidates are equal to the coding parameters of said merely one previously decoded block partition, and remove from the set of coding parameter candidates for the respective block partition, any coding parameter candidate adopted from any block partition, which would, when being merged with the respective block partition, result in one of the supported partitioning patterns, determine, for the respective block partition of the current block, a set of coding parameter candidates, wherein at least some coding parameters candidates are adopted from the coding parameters of merely one previously decoded block partition so that the at least some coding parameter candidates are equal to the coding parameters of said merely one previously decoded block partition, and remove from the set of coding parameter candidates for the respective block partition, any coding parameter candidate adopted from any block partition, which would, when being merged with the respective block partition, result in one of the supported partitioning patterns, from the set of coding parameter candidates for the respective block partition, any coding parameter candidate adopted from any block partition, which would, when being merged with the respective block partition, result in one of the supported partitioning patterns, characterized in that the determination of the set of coding parameter candidates of the respective block partition of the current block further comprises deriving at least some further coding parameter candidates from a combination of coding parameters of more than one previously decoded block partitions, or from - by modification - coding parameters of one previously decoded partition. from a combination of coding parameters of more than one previously decoded block partitions, or from - by modification - coding parameters of one previously decoded partition.