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

Claim 8:
9. A device for video decoding, the device comprising:
at least one memory configured to store program code; and
at least one processor configured to read the program code and operate as instructed by the program code, the program code including:
first obtaining code configured to cause the at least one processor to obtain video data including a syntax element indicating a quantization index;
parsing code configured to cause the at least one processor to parse the syntax element to determine the quantization index;
adding code configured to cause the at least one processor to add an offset value to the quantization index;
second obtaining code configured to cause the at least one processor to obtain a quantization step size from a lookup table based on the quantization index and the offset value; and
decoding code configured to cause the at least one processor to decode 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.