公开(公告)号：US20130272386A1

公开(公告)日：2013-10-17

申请号：US13800268

申请日：2013-03-13

Applicant: QUALCOMM INCORPORATED

Inventor： Yang Yu ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/126 ,  H04N19/147 ,  H04N19/149 ,  H04N19/172 ,  H04N19/18

Abstract: A computing device, such as a video encoder, uses respective positions of respective coefficients in a coefficient block to look up, in a lookup table, respective quantization offsets for the respective coefficients. Furthermore, the computing device determines, based at least in part on the quantization offsets for the one or more coefficients, respective quantized levels for the respective coefficients.

Abstract translation: 诸如视频编码器的计算设备使用系数块中的各个系数的相应位置在查找表中查找各个系数的相应的量化偏移。 此外，计算设备至少部分地基于一个或多个系数的量化偏移来确定各个系数的相应量化电平。

公开(公告)号：US20130272385A1

公开(公告)日：2013-10-17

申请号：US13800155

申请日：2013-03-13

Applicant: QUALCOMM INCORPORATED

Inventor： Yang Yu ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N7/26

CPC classification number: H04N19/126 ,  H04N19/147 ,  H04N19/149 ,  H04N19/172 ,  H04N19/18

Abstract: A computing device, such as a video encoder, determines an initial quantized level for a coefficient of a coefficient block and determines whether the coefficient is less than the product of the initial quantized level and a quantization step size value. In response to determining that the coefficient is less than the product of the initial quantized level and the quantization step size value, the computing device determines rate-distortion costs of quantizing the coefficient to be the initial quantized level for the coefficient, the initial quantized level minus one, and in some circumstances, 0. The computing device determines an actual quantized level for the coefficient based at least in part on the calculated rate-distortion costs and includes the actual quantized level in a quantized version of the coefficient block.

Abstract translation: 诸如视频编码器的计算设备确定系数块系数的初始量化电平，并确定该系数是否小于初始量化电平与量化步长值的乘积。 响应于确定系数小于初始量化电平和量化步长值的乘积，计算装置确定将系数量化为系数的初始量化电平的速率失真成本，初始量化电平 在一些情况下，在一些情况下，计算装置至少部分地基于所计算的速率失真成本来确定系数的实际量化级别，并且包括系数块的量化版本中的实际量化级别。