Patent ID: 11902531
Assignee: QUALCOMM INCORPORATED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of decoding video data, the method comprising:
determining a transform unit (TU) class from a plurality of TU classes based on a height and a width of a current block of the video data, wherein the plurality of TU classes includes more than two TU classes;
determining an intra prediction mode from a plurality of intra prediction modes for the current block of the video data;
determining an intra prediction mode cluster based on the intra prediction mode and the TU class;
determining a low frequency non-separable transform (LFNST) kernel from a plurality of LFNST kernels for the current block based on the intra prediction mode cluster and the TU class, wherein each LFNST kernel of the plurality of LFNST kernels is assigned to at least one intra prediction mode cluster from a plurality of intra prediction mode clusters and at least one TU class from the plurality of TU classes;
applying an inverse of the determined LFNST kernel to coefficient values generated from a transform unit (TU) of the current block to generate intermediate values;
applying an inverse primary transform on the intermediate values to generate residual data; and
reconstructing the current block based on the residual data.