Patent ID: 11949882
Assignee: SONY GROUP CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. An image encoding method comprising:
selecting, from a set of candidate prediction operations each defining at least a prediction direction, a prediction operation for prediction of samples of a current region of a current image, the current region comprising an array of two or more rows and two or more columns of samples;
deriving intra-image predicted samples of the current region with respect to one or more of a group of reference samples of the same image in dependence upon a prediction direction, defined by the selected prediction operation, between a current sample to be predicted and a reference position amongst the reference samples, wherein for at least some of the candidate prediction operations, the group of reference samples comprises two or more parallel linear arrays of reference samples disposed at different respective separations from the current region;
detecting whether samples of any of the two or more parallel linear arrays of reference samples are unavailable for use in prediction of samples of the current region; and
inhibiting selection by the selecting step, if any of the two or more parallel linear arrays of reference samples are unavailable including a case where one of the two or more parallel linear arrays of reference samples is unavailable and another of the two or more parallel linear arrays of reference samples is available, of a candidate prediction operation dependent upon the reference samples of the two or more parallel linear arrays of reference samples.