公开(公告)号：US20140086313A1

公开(公告)日：2014-03-27

申请号：US14094193

申请日：2013-12-02

Applicant: Tsinghua University ,  Huawei Technologies Co., Ltd.

Inventor： Jianhua ZHENG ,  Yun HE ,  Jianwen CHEN

IPC: H04N7/26

CPC classification number: H04N19/124 ,  H04N19/107 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/196 ,  H04N19/61

Abstract: A method for realizing adaptive quantization in image encoding and dequantization in image decoding is disclosed. In the adaptive quantization method, an image to be encoded is divided into one or more blocks, and each block is transformed to obtain one or more transform coefficients, the method comprising: acquiring parameter information of neighbor blocks of a current block; determining a quantization mode for the current block according to the parameter information of the neighbor blocks; and quantizing transform coefficients of the current block in the determined quantization mode. The quantization mode includes at least one of quantization matrix, quantization parameter and quantization step.

Abstract translation: 公开了一种在图像解码中进行图像编码和去量化中的自适应量化的方法。 在自适应量化方法中，将要编码的图像划分为一个或多个块，并且对每个块进行变换以获得一个或多个变换系数，所述方法包括：获取当前块的相邻块的参数信息; 根据相邻块的参数信息确定当前块的量化模式; 以及在所确定的量化模式中量化当前块的变换系数。 量化模式包括量化矩阵，量化参数和量化步骤中的至少一个。