Patent ID: 11917130
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A method implemented by a decoder, the method comprising:
receiving, by the decoder, tracks containing sub-picture bitstreams, wherein each sub-picture bitstream contains a sub-picture constrained such that:
no sample values outside the sub-picture are referenced for inter-prediction;
motion vectors are restricted to point to full-sample locations inside the sub-picture and to fractional-sample locations that employ only full-sample locations inside the sub-picture for interpolation;
inter-prediction is restricted so motion vector candidates for temporal motion vector prediction are not derived from blocks outside the sub-picture; and
samples with a same sample number across a plurality of tracks are required to have a same presentation time; and

decoding, by the decoder, the tracks containing the sub-picture bitstreams.