System for deriving a decoded reduced-resolution video signal from a coded high-definition video signal
    3.
    发明公开
    System for deriving a decoded reduced-resolution video signal from a coded high-definition video signal 审中-公开
    系统推导有限的分辨能力的视频信号解码来自高分辨率视频信号

    公开(公告)号:EP0973337A2

    公开(公告)日:2000-01-19

    申请号:EP99401756.4

    申请日:1999-07-13

    IPC分类号: H04N7/26 H04N7/30

    摘要: A system for decoding compressed image data in the form of pixel blocks representing an image of a first resolution to provide an image of a reduced second resolution decompresses a pixel block of the first resolution image. The system involves selecting (204) a sub-set of frequency domain coefficients in the compressed pixel block data, and processing elements (204,205,206,208) of the sub-set of coefficients to provide pixel data representing pixels comprising a spatially distributed sub-set of pixels in the pixel block in the first resolution image and excludes other pixels of the pixel block. The pixel data representing pixels comprising the spatially distributed pixels is formatted (210) to provide the reduced second resolution image.

    摘要翻译: 一种用于在表示第一分辨率的图像,以提供降低的第二分辨率的图像的像素块的形式压缩的图像数据进行解码和解压缩系统的第一分辨率图像的像素块。 该系统包括选择在压缩的像素块数据(204)的子集的频域系数,并且所述系数子集,以提供像素数据表示包括象素的一个子集的像素的空间分布的处理元件(204205206208) 在第一分辨率图象中的象素块,并且排除该像素块的其它像素。 代表包括所述空间分布象素的象素的象素数据被格式化(210),以提供降低的第二分辨率的图像。