Patent ID: 11924470
Assignee: INTOPIX SA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A method of encoding a sequence of frames, the method comprising:
a linear transform step in which a linear transform is applied to the sequences of frames on a frame-by-frame basis so as to obtain a sequence of linearly transformed frames having an entropy that is lower than that of the frames in the sequence of frames to be encoded, and
an encoding step in which the sequence of linearly transformed frames is encoded so as to obtain a sequence of encoded frames comprising an amount of data that is less than that of the linearly transformed frames,
wherein, in the encoding step, at least one portion of a linearly transformed frame is encoded in an inter mode whereas at least one other portion of the same linearly transformed frame is encoded in an inter mode, so as to obtain an encoded frame, the at least one portion and the at least one other portion having different spatial positions within the same linearly transformed frame,
whereby, in the inter mode, a differential representation of a portion of the linearly transformed frame is provided, the differential representation corresponding with a difference between, on the one hand, the portion of the linearly transformed frame and, on the other hand, a representation of a corresponding portion of at least one other linearly transformed frame, and in which data compression is applied to the differential representation of the portion of the linearly transformed frame, and
whereby, in the intra mode, the data compression is directly applied to another portion of the same linearly transformed frame.