Patent ID: 10085025

Abstract:
Disclosed are image quantization parameter decoding method and systems for decoding a quantization parameter for a video decoding process that is based on context-based adaptive binary arithmetic coding. In one embodiment, an image quantization parameter decoding method includes binary-arithmetic-decoding a first bin indicating whether or not a delta quantization parameter is significant, other bins, which are subsequent to the first bin, indicating an absolute value of the delta quantization parameter, and a sign bin, which is subsequent to the other bins, indicating whether the delta quantization parameter is positive or negative. The method further includes generating a delta quantization parameter by de-binarizing the first bin, the other bins and the sign bin. The method further includes generating a re-constructed quantization parameter by adding a predicted quantization parameter to the delta quantization parameter. The binary-arithmetic-decoding is performed using contexts for the first bin and the other bins, and using no context for the sign bin.