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    • 4. 发明授权
    • Apparatus for receiving and selecting high-definition television (HDTV)
signals and standard television (NTSC) signals
    • 用于接收和选择高分辨率电视(HDTV)信号和标准电视(NTSC)信号的装置
    • US4984081A
    • 1991-01-08
    • US301034
    • 1989-01-24
    • Toshihiro MiyoshiMasahiro KawashimaHideyuki IkuharaTetsuo KutsukiKazuyasu Yamamoto
    • Toshihiro MiyoshiMasahiro KawashimaHideyuki IkuharaTetsuo KutsukiKazuyasu Yamamoto
    • H04N5/44
    • H04N7/0122
    • An apparatus for receiving and selecting high-definition television signals and NTSC standard television signals includes a high-definition display screen device having an aspect ratio of 16 to 9. The NTSC standard television signals have an aspect ratio which is different than the 16 to 9 aspect ratio of the high-definition display screen device. A first signal converter is for converting the NTSC standard television signals into first quasi-high-definition television signals identifying a first displayed image corresponding in vertical length to a vertical length of the high-definition display screen device. A second signal converter is for converting the NTSC standard television signals into second quasi-high-definition television signals identifying a second displayed image corresponding in horizontal length to a horizontal length of the high-definition display screen device. Switching circuits are provided for selecting one of the high-definition television signals and the first and second quasi-high-definition television signals.
    • 一种用于接收和选择高分辨率电视信号和NTSC标准电视信号的装置包括具有16至9的宽高比的高分辨率显示屏幕设备.NTSC标准电视信号的宽高比不同于16到9 高清显示屏设备的宽高比。 第一信号转换器用于将NTSC标准电视信号转换为第一准高清晰度电视信号,其将垂直长度对应的第一显示图像识别为高清晰度显示屏设备的垂直长度。 第二信号转换器用于将NTSC标准电视信号转换成识别与水平长度对应的第二显示图像与高分辨率显示屏设备的水平长度的第二准高清晰度电视信号。 提供开关电路用于选择高分辨率电视信号和第一和第二准高清晰度电视信号之一。