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

Claim 9:
10. A device for decoding video data, the device comprising:
memory; and
processing circuitry coupled to the memory and configured to:
determine 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;
determine an intra prediction mode from a plurality of intra prediction modes for the current block of the video data;
determine an intra prediction mode cluster based on the intra prediction mode and the TU class;
determine 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;
apply an inverse of the determined LFNST kernel to coefficient values generated from a transform unit (TU) of the current block to generate intermediate values;
apply an inverse primary transform on the intermediate values to generate residual data; and
reconstruct the current block based on the residual data.