公开(公告)号：US20160353107A1

公开(公告)日：2016-12-01

申请号：US14721903

申请日：2015-05-26

Applicant: Apple Inc.

Inventor： Jian Lou ,  Congxia Dai ,  Hao Pan ,  Xiaohua Yang

IPC: H04N19/126 ,  H04N19/184 ,  H04N19/172 ,  H04N19/182 ,  H04N19/176

CPC classification number: H04N19/176 ,  H04N19/124 ,  H04N19/136 ,  H04N19/167 ,  H04N19/182

Abstract: Methods and systems provide an adaptive quantization parameter (QP) modulation scheme for video coding and compression that is sensitive to user visual perception. In an embodiment, the method includes detecting an eye sensitive region, where a region is considered sensitive based on a noticeability of a visual effect. The method includes estimating encoding parameters for image content in the detected eye sensitive region. The method further includes encoding the detected eye sensitive region with the estimated encoding parameters. The estimating the encoding parameters may be based on, among other things, a variance, a motion vector, a DC value, an edge value, and external information such as a user command or screen content. The encoding may include storing an average or maximum sum of square differences (SSD) value for a detected eye sensitive area and adjusting a QP value based on a comparison of the SSD value to generated threshold values.

Abstract translation: 方法和系统为视频编码和压缩提供了一种对用户视觉感知敏感的自适应量化参数（QP）调制方案。 在一个实施例中，该方法包括基于视觉效果的显着性检测区域被认为是敏感的眼睛敏感区域。 该方法包括估计检测到的眼睛敏感区域中的图像内容的编码参数。 该方法还包括用所估计的编码参数来编码检测到的眼睛敏感区域。 估计编码参数可以基于方差，运动矢量，DC值，边缘值以及诸如用户命令或屏幕内容的外部信息。 编码可以包括存储检测到的眼睛敏感区域的平均差异（SSD）值的平均或最大和，并且基于SSD值与生成的阈值的比较来调整QP值。