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    • 3. 发明授权
    • Video encription system
    • 视频处理系统
    • US3982062A
    • 1976-09-21
    • US382820
    • 1973-07-26
    • Kenneth Simons
    • Kenneth Simons
    • H04N7/167H04N1/44
    • H04N7/167
    • Encription apparatus for restricting distribution of private (e.g., premium) video programs propagated by a CATV cable network, radiation or the like employs picture carrier isolating, phase shifting and linear combining structure for rendering the transmitted video information unrecoverable by conventional television receivers. Authorized receiving stations are provided with inversely functioning electronics which reconstitute the prescribed video amplitude modulation format to permit signal reception. Similar audio program modification and correction structure permits encription and selective reception of the sound portion of the distributed programming.
    • 用于限制由CATV有线网络传播的私有(例如,高价格)视频节目的分发的装置,辐射等采用图像载波隔离,相移和线性组合结构,用于呈现传统电视接收机不可恢复的传输视频信息。 为授权接收站提供反功能的电子装置,其重构规定的视频幅度调制格式以允许信号接收。 类似的音频节目修改和校正结构允许对分布式节目的声音部分进行封装和选择性接收。