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    • 9. 发明授权
    • Letterbox television signal with edge regions containing transformed
pixel values
    • 信箱电视信号与边缘区域包含转换的像素值
    • US5274449A
    • 1993-12-28
    • US890638
    • 1992-04-10
    • Heinz-Werner Keesen
    • Heinz-Werner Keesen
    • H04N7/015H04N7/00H04N7/01H04N11/16H04N7/04
    • H04N11/167H04N7/007
    • In a system for generating a compatible television signal with a "letterbox" display format, groups of vertically arranged picture elements (pels) are subjected to vertical DCT transformation producing eight DCT coefficients. Intermediate sixth and seventh coefficients are placed in the letterbox bar regions. The remaining six coefficients, namely the first through fifth coefficients and the highest frequency eighth coefficient, are inverse DCT transformed and processed with the main image information. A standard aspect ratio receiver displays a letterbox image using only the remaining six coefficients. A wide aspect ratio receiver uses the six remaining coefficients with the two coefficients from the bar regions, after inverse DCT, to produce a full resolution wide aspect ratio image.
    • 在用于产生具有“信箱”显示格式的兼容电视信号的系统中,对垂直排列的图像元素(像素)进行垂直DCT变换,产生八个DCT系数。 中间第六和第七系数被放置在信箱栏区域中。 剩余的六个系数,即第一到第五系数和最高频率的第八系数都被逆DCT变换并用主图像信息进行处理。 标准宽高比接收器仅使用剩余的六个系数来显示信箱图像。 宽纵横比接收机在逆DCT之后使用来自条形区域的两个系数的六个剩余系数,以产生全分辨率宽宽比图像。