Patent ID: 11956429
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 41:
42. The encoder of claim 27, wherein the memory further stores instructions that, when executed by the processor, cause the processor to:
encode a split mode flag for the current block of the picture into the data stream, the split mode flag indicating, if set, that the current block is coded using the partitioning, the transforming and the signaling of the prediction residual of the partitions, or, if not set, that the current block is coded using an alternative manner of spatial intra prediction using the intra prediction mode determined for the current block,
decide, using a coding cost minimization scheme, on the intra-coding mode out of a set of supported intra prediction modes and the split mode flag being set or not set, by:
performing coding cost tests on the current block in order to identify a supported intra prediction mode out of the set of supported intra prediction modes that is preferred in terms of coding costs when coding the current block using the supported intra prediction modes in the alternative manner, in order to acquire the intra-coding mode for the current block and a reference coding cost associated therewith when coding the current block using intra-coding mode in the alternative manner, and
in transforming, determining a coding subcost associated with the prediction residual for use in combining the predictor to reconstruct the current partition, adding the coding subcost to a sum of preceding coding costs associated with prediction residuals of preceding partitions of the current block to acquire an updated coding cost sum, checking whether the updated coding cost sum exceeds the reference coding cost and aborting the transforming in case of the coding cost exceeding the reference coding cost with encoding the split mode flag not being set, and encoding the split mode flag being set if the updated coding cost sum acquired for the last partition in the predetermined partition order does not exceed the reference coding cost.