Device and method for the compression or decompression of digital images
    1.
    发明公开
    Device and method for the compression or decompression of digital images 有权
    Gerätund Verfahren zur Kompression oder Dekompression digitaler Bilder

    公开(公告)号:EP1511323A1

    公开(公告)日:2005-03-02

    申请号:EP04102950.5

    申请日:2004-06-24

    IPC分类号: H04N7/26

    摘要: The present invention relates to a device for the compression and/or decompression (260) of digital images (212) coded by means of a base layer (216 22 ), generated by a method of compression using a compression stepsize (QP), and by means of an enhancement layer (216 40 ), generated by coding the residual existing between the compressed image and the image coded by the base layer.
    According to the invention, the device is characterized in that it comprises means (278, 280, 282) for determining a compression stepsize (Q det ) relating to the image coded by the base layer (216 22 ) and by the enhancement layer (216 40 ), and means for instructing a filtering of this coded image as a function of this determined stepsize (Q det ).

    摘要翻译: 本发明涉及一种用于通过使用压缩步长(QP)的压缩方法生成的借助于基本层(21622)编码的数字图像(212)的压缩和/或解压缩(260)的装置,以及通过 通过对存在于压缩图像与由基础层编码的图像之间的残差进行编码而生成的增强层(21640)的装置。 根据本发明,该装置的特征在于它包括用于确定与由基本层(21622)编码的图像相关的压缩步长(Qdet)的装置(278,280,282)和由增强层 (21640),以及用于根据该确定的步骤(Qdet)指示对该编码图像进行过滤的装置。