METHOD AND APPARATUS FOR HIERARCHICAL DATA UNIT-BASED VIDEO ENCODING AND DECODING COMPRISING QUANTIZATION PARAMETER PREDICTION
- 申请公布号：
- US2016050416(A1)
- 申请号：
- US201514925211
- 申请日期：
- 2015.10.28
- 申请公布日期：
- 2016.02.18
- 申请人：
- SAMSUNG ELECTRONICS CO., LTD.
- 发明人：
- LEE Tammy
- 分类号：
- H04N19/124;H04N19/61;H04N19/176
- 主分类号：
- H04N19/124
- 地址：
- Seoul KR
- 摘要：
- A method of decoding a video includes determining an initial value of a quantization parameter (QP) used to perform inverse quantization on coding units included in a slice segment, based on syntax obtained from a bitstream; determining a slice-level initial QP for predicting the QP used to perform inverse quantization on the coding units included in the slice segment, based on the initial value of the QP; and determining a predicted QP of a first quantization group of a parallel-decodable data unit included in the slice segment, based on the slice-level initial QP.
- 主权项：
- 1. A video decoding apparatus comprising:
a processor to obtain a quantization parameter of a slice, generate a predicted quantization parameter of a current quantization group using the quantization parameter of the slice, generate a predicted quantization parameter of a next quantization group using the quantization parameter of the slice, obtain, according to a size of a coding unit included in the first largest coding unit in a current row including the current quantization group, a syntax to determine a quantization parameter of the current quantization group, determine the quantization parameter of the current quantization group using the syntax and the predicted quantization parameter of the current quantization group, and perform an inverse quantization on the current quantization group and the next quantization group, wherein the current quantization group is a first quantization group in the current row included in the slice, the next quantization group is a first quantization group in a next row included in the slice, and each of the current row and the next row comprises a plurality of largest coding units.
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