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    • 1. 发明授权
    • Continuous information add-on system
    • 连续信息附加系统
    • US3924060A
    • 1975-12-02
    • US48238174
    • 1974-06-24
    • HAZELTINE RESEARCH INC
    • BEDFORD ALAN D
    • H04N7/00H04N7/081H04N11/06
    • H04N11/06H04N7/081
    • Disclosed is a system for transmitting and receiving add-on information in conjunction with the transmission and reception of TV signals. In accordance with the invention there are provided first and second add-on signal components in phase quadrature. The second add-on signal component has, during each TV line interval, a polarity opposite to the polarity of the first add-on signal component of the preceding TV line interval to achieve substantial visual cancellation of the add-on signal components in the displayed image. Further, the second add-on signal component is representative, during each time successive line interval, of the identical add-on information represented by the first add-on signal component during the preceding line interval. Processing means are provided for cancelling redundant video information contained in time successive line intervals and reinforcing the intentionally redundant add-on information represented by the first and second add-on signal components.
    • 公开了一种与电视信号的发送和接收一起发送和接收附加信息的系统。 根据本发明,提供了相位正交的第一和第二附加信号分量。 在每个TV行间隔期间,第二附加信号分量具有与前一TV行间隔的第一附加信号分量的极性相反的极性,以实现所显示的附加信号分量的实质视觉消除 图片。 此外,第二加载信号分量在每个连续行间隔期间代表在前一行间隔期间由第一附加信号分量表示的相同附加信息。 提供处理装置,用于消除包含在时间连续行间隔中的冗余视频信息,并加强由第一和第二附加信号分量表示的故意冗余附加信息。