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    • 10. 发明公开
    • Video signal recording and playback apparatus
    • Vorrichtung zum Aufnehmen und Wiedergeben von Videosignalen。
    • EP0663780A2
    • 1995-07-19
    • EP95300227.6
    • 1995-01-13
    • VICTOR COMPANY OF JAPAN, LIMITED
    • Yamada, Hiroshi
    • H04N9/797H04N9/83
    • H04N7/007H04N5/7826H04N9/7921H04N9/83H04N9/832H04N9/87H04N9/8722H04N9/88
    • A video signal recording and playback apparatus which is compatible with both a conventional television system signal and a wide-screen television system signal, such as PAL and PALplus video signals, has a helper signal demodulator (81) and helper signal remodulation circuit (84), respectively connected to input and output sides of a conventional video tape recorder (82, 83). The demodulator serves to demodulate a modulated helper signal contained in the wide-screen system signal, to obtain a baseband-state helper signal which is recorded and reproduced through a luminance signal processing system of a video tape recorder together with the luminance signal component of the video signal, while the remodulation circuit serves to modulate the playback baseband-state helper signal, to recover a modulated helper signal which can be utilized to compensate the playback video signal to achieve enhanced vertical resolution of a resultant display picture.
    • 与常规电视系统信号和PAL等视频信号等宽屏幕电视系统信号兼容的视频信号记录再现装置具有辅助信号解调器(81)和辅助信号再调制电路(84) ,分别连接到传统录像机(82,83)的输入和输出侧。 解调器用于解调宽屏系统信号中包含的调制辅助信号,以获得通过录像机的亮度信号处理系统记录和再现的基带状态辅助信号以及亮度信号分量 视频信号,而再调制电路用于调制重放基带状态辅助信号,以恢复调制的辅助信号,其可用于补偿重放视频信号以实现所得到的显示图像的增强的垂直分辨率。