Patent ID: 9538192
Date: 2017-01-03
CPC Classifications: H04N

Claim:
1. A video decoding method comprising: obtaining a quantization parameter of a slice; generating a predicted quantization parameter of a current quantization group using the quantization parameter of the slice; generating a predicted quantization parameter of a next quantization group using the quantization parameter of the slice; obtaining, according to a size of a coding unit included in a 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; determining a quantization parameter of the current quantization group using the syntax and the predicted quantization parameter of the current quantization group; and performing 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, each of the current row and the next row comprises a plurality of largest coding units, wherein a predicted quantization parameter of a quantization group in the current row which is not the current quantization group, is generated using a quantization parameter of a neighboring coding unit of the quantization group in the current row, and wherein a predicted quantization parameter of a quantization group in the next row which is not the next quantization group, is generated using a quantization parameter of a neighboring coding unit of the quantization group in the next row.