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METHOD AND APPARATUS FOR VIDEO CODING

  • US 20200137391A1
  • Filed: 12/26/2019
  • Published: 04/30/2020
  • Est. Priority Date: 09/30/2018
  • Status: Active Grant
First Claim
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1. A method for video decoding in a decoder, comprising:

  • decoding, from a coded video bitstream, a syntax element for a picture-level initial quantization parameter (QP) value for a picture;

    recovering, by processing circuitry of the decoder, a segment level initial QP value of a segment in the picture by adding the picture-level initial QP value and an adjustment value calculated based on a maximum QP value for the picture, the adjustment value increasing when the maximum QP value increases and decreasing when the maximum QP value decreases;

    determining a QP value for a block in the segment according to the segment level initial QP value of the segment and an additional adjustment associated with the block; and

    performing an inverse quantization on quantized data of the block according to the determined QP value for the block.

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