METHOD FOR CODING VIDEO QUANTIZATION PARAMETER AND METHOD FOR VIDEO QUANTIZING PARAMETER CODING

摘要

1. A method for encoding a video quantization parameter for encoding a quantization parameter for a video encoding process that is based on context adaptive binary arithmetic coding, a video quantization parameter encoding method is that: generate a predicted quantization parameter from a past reconstructed quantization parameter; generate a delta a quantization parameter from a quantization parameter and a predicted quantization parameter; and perform binary arithmetic coding of the first cell indicating whether the delta quantization parameter is significant, the second cell indicating whether the delta quantization parameter is positive or negative, and other cells indicating the absolute value of the quantization delta parameter, in the case where the delta quantization parameter is significant. 2. A method for encoding a video quantization parameter according to claim 1, wherein the binary arithmetic coding is performed using different contexts for the second cell and cells other than the second cell. A method for decoding a video quantization parameter for decoding a quantization parameter for a video decoding process that is based on context adaptive binary arithmetic coding, this method for decoding a video quantization parameter is that: generate a predicted quantization parameter from a past reconstructed quantization parameter; and perform binary arithmetic decoding of the first cell indicating whether the delta quantization parameter is significant, the second cell indicating whether the delta quantization parameter is