Patent ID: 11968365
Assignee: TENCENT AMERICA LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for video encoding in an encoder, comprising:
determining an initial quantization parameter (QP) value of a segment in a picture by adding an adjusted initial QP value at a picture level and an adjustment value calculated based on a half of a maximum QP value, the half of the maximum QP value being calculated according to one of
a right bit-shift of the maximum QP value, or
a right bit-shift of a sum of the maximum QP value and one;

determining a QP value for a block in the segment according to the initial QP value of the segment and an additional adjustment associated with the block;
performing quantization on the block according to the determined QP value for the block; and
encoding the quantized block and generating a coded video bitstream including the encoded block and including a syntax element indicating the adjusted initial QP at the picture level,
wherein the adjusted initial QP value at the picture level is in a range having an upper boundary that is based on the maximum QP value.