公开(公告)号：US06181822B2

公开(公告)日：2001-01-30

申请号：US08954819

申请日：1997-10-21

Applicant: Daniel B. Miller ,  David B. Silver

Inventor： Daniel B. Miller ,  David B. Silver

IPC: G06K936

CPC classification number: H04N11/046 ,  H04N19/593

Abstract: A method and apparatus is disclosed for digitally compressing video signals. The method and apparatus provides a system which generates values related to the differences between respective pixel locations and an x,y pixel display. The differences generated between proximate pixel locations are used to generate various delta values which are encoded in an asymmetric fashion. The asymmetric coding eliminates artifacts in the displayed image, and the delta encoding is performed in both a horizontal and vertical direction (otherwise known as Two-Dimensional Delta Encoding) and this operation tends to randomly distribute error in the compression process across the visual image so as to approximate noise or grain generally perceived by the viewer in an analog display.

Abstract translation: 公开了用于数字压缩视频信号的方法和装置。 该方法和装置提供一种系统，其产生与各个像素位置和x，y像素显示之间的差异相关的值。 在邻近像素位置之间产生的差异用于生成以不对称方式编码的各种增值值。 不对称编码消除了所显示的图像中的伪影，并且在水平和垂直方向（也称为二维增量编码）中执行增量编码，并且该操作倾向于在视觉图像上的压缩过程中随机分布误差，因此 以便在模拟显示器中接近观察者通常感觉到的噪声或纹理。