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    • 1. 发明授权
    • Subpicture image signal vertical compression circuit
    • 子画面图像信号垂直压缩电路
    • US5831684A
    • 1998-11-03
    • US657643
    • 1996-05-30
    • Tomoko MoritaNaoji OkumuraMasahiro Tani
    • Tomoko MoritaNaoji OkumuraMasahiro Tani
    • H04N5/45
    • H04N5/45
    • A subpicture image signal vertical compression circuit for vertically compressing subpictures operating at respective synchronous timings different from that of the main picture when a plurality of image signals having respectively different synchronizations are displayed on an image display device. Depending on whether the field polarities of main and sub pictures are the same or not, the subpicture image signal vertical compression circuit generates suitable offsets for the first and the second fields to adjust the phases and prevent the inversion of the scan order in the vertical direction, at the first field and the second field of subpicture signal, after the phase adjustment to obtain a subpicture image with natural motion in the vertical direction.
    • 一种副图像图像信号垂直压缩电路,用于当在图像显示装置上显示具有不同同步的多个图像信号时,垂直压缩在与主图像不同的同步定时工作的子图像。 根据主图像和副图像的场极性是否相同,子画面图像信号垂直压缩电路产生用于第一和第二场的适当偏移量以调整相位并防止垂直方向上的扫描顺序的反转 在第一场和第二场子画面信号之后,进行相位调整,以在垂直方向上获得具有自然运动的子画面图像。