Patent ID: 9549185
Date: 2017-01-17
CPC Classifications: H04N

Claim:
1. A video decoding apparatus comprising: a processor configured 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, 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 a 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, and 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.