Patent ID: 11882301
Assignee: TENCENT AMERICA LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A method of video decoding using at least one processor, the method comprising:
obtaining video data including a syntax element indicating a quantization index;
parsing the syntax element to determine the quantization index;
adding an offset value to the quantization index;
obtaining a quantization step size from a lookup table based on the quantization index and the offset value; and
decoding the video data based on the quantization step size,
wherein based on the quantization index being smaller than a threshold value, the quantization step size based on a linear mapping with the quantization index and the offset value, and
wherein based on the quantization index being larger than the threshold value, the quantization step size based on an exponential mapping with the quantization index and the offset value.