Simplification of LM mode

摘要

A video codec comprising a processor computing an average of a plurality of reconstructed chroma samples located in neighboring blocks of a chroma block and adjacent to the chroma block, computing an intermediate variable by applying an integer function on the average of the reconstructed chroma samples, and generating a predicted chroma sample for the chroma block based on the intermediate variable.

主权项

1. A video codec comprising:
a prediction module; a processor coupled to the prediction module, wherein the processor is configured to:
compute an average of a plurality of reconstructed chroma samples located in neighboring blocks of a chroma block and adjacent to the chroma block;compute an intermediate variable by applying an integer function on the average of the reconstructed chroma samples, wherein the integer function is selected from a group consisting of a rounding function, a ceiling function, and a flooring function;generate a predicted chroma sample for the chroma block based on the intermediate variable; andcommunicate the predicted chroma sample to the prediction module, wherein the prediction module is configured to generate a prediction block comprising a plurality of predicted chroma samples, wherein the intermediate variable is a first intermediate variable denoted as avgC, wherein the processor is further configured to compute a second intermediate variable representing a difference between a sum of the plurality of reconstructed chroma samples and 2*nS*avgC, wherein nS denotes a width of the chroma block, wherein a number of the reconstructed chroma samples equals 2*nS, and wherein generating the predicted chroma sample is further based on the second intermediate variable.