Patent ID: 11863790
Assignee: TENCENT AMERICA LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A non-transitory computer-readable storage medium storing instructions that, when executed, cause a system or device comprising one or more processors to:
receive an entropy coded bitstream comprising compressed video data;
generate one or more dequantized blocks by a process comprising:
parsing the bitstream;
decoding the entropy coded bitstream; and
dequantizing each block of the one or more blocks;

determine whether at least one of a height and a width of the one or more dequantized blocks is greater than or equal to a predefined threshold; and
responsive to the at least one of the height or the width of the one or more dequantized blocks being greater than or equal to the predefined threshold, transform code a dequantized block using a tuned line graph transform (LGT) core to perform direct matrix multiplications for each of the horizontal and vertical dimensions of the one or more dequantized blocks,
wherein the LGT core is a Discrete Cosine Transform (DCT) or a Discrete Sine Transforms (DST) that is derived by using generalized graph Laplacian (GGL) matrices, and
wherein the instructions further cause the system or device comprising the one or more processors to, prior to using the LGT core, generate the LGT core by using an associated generalized graph Laplacian (GGL) matrix and at least one of a first self-loop weight or a second self-loop weight in the associated GGL matrix, the first self-loop weight and the second self-loop weight being each set in advance to specific respective values.