Patent ID: 11936852
Assignee: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of processing video data, comprising:
determining, for a conversion between a current video block of a current picture of a video and a bitstream of the video, that a prediction mode is applied on the current video block;
maintaining, for the current video block, a buffer comprising reference samples derived from blocks of sample values of a same video region of the current video block in the current picture;
generating, for the current video block, prediction samples based on the determining; and
performing the conversion between the current video block and the bitstream,
wherein in the prediction mode, the reference samples determined by a block vector in the buffer are used for a derivation of prediction samples of the current video block,
wherein a specific reference block in the buffer that is marked unavailable for the derivation have values outside of a pixel value range, and
wherein values of reference samples in the specific reference block marked unavailable are set to a predetermined value indicative of unavailability of the samples.