公开(公告)号：US06229925B1

公开(公告)日：2001-05-08

申请号：US09081447

申请日：1998-05-19

申请人： Patrice Alexandre ,  Jean-Christophe Morizur ,  Claude Perron

发明人： Patrice Alexandre ,  Jean-Christophe Morizur ,  Claude Perron

IPC分类号： G06K936

CPC分类号： H04N19/87 ,  H04N19/114 ,  H04N19/137 ,  H04N19/14 ,  H04N19/142 ,  H04N19/146 ,  H04N19/15 ,  H04N19/159 ,  H04N19/177 ,  H04N19/179 ,  H04N19/61 ,  H04N19/80 ,  H04N19/85

摘要： The invention relates to a device for pre-processing video images intended to be coded in the MPEG 2 format. The MPEG 2 standard provides that, mode which exploits the spatial redundancy of the images. The images thus coded then define a succession of groups of images, a group of images being referred to as a GOP. The pre-processing device according to the invention comprises an image memory and an analysis circuit. The image memory makes it possible to store the various images contained in the forecast GOP of rank ok and ax of the first few images contained in the GOP of rank ok+l, ax being an integer greater than or equal to 1. The analysis circuit is linked to the image memory and makes it possible to perform measurements on the images contained therein. The knowledge about the images of the GOP of rank and about the first images of the forecast GOP of rank k+1 which is ascertained following the above mentioned measurements is then used for coding the GOP of rank k. The invention applies to systems for coding images according to the MPEG 2 standard.

摘要翻译： 本发明涉及一种用于预处理以MPEG2格式编码的视频图像的装置。 MPEG 2标准提供了利用图像的空间冗余的模式。 因此，如此编码的图像定义了一组连续的图像，一组图像被称为GOP。根据本发明的预处理装置包括图像存储器和分析电路。图像存储器使得可以存储 包含在秩ok的预测GOP中的各种图像和包含在等级ok + l的GOP中的前几个图像的ax，ax是大于或等于1的整数。分析电路链接到图像存储器 可以对其中包含的图像执行测量。 关于GOP的等级图像和关于按照上述测量确定的秩k + 1的预测GOP的第一图像的知识然后被用于对等级k的GOP进行编码。本发明适用于编码的系统 图像根据MPEG 2标准。