Circuit for modifying the color information of a television signal
    1.
    发明授权
    Circuit for modifying the color information of a television signal 失效
    修改电视信号颜色信息的电路

    公开(公告)号:US3588321A

    公开(公告)日:1971-06-28

    申请号:US73632868

    申请日:1968-06-12

    申请人: TELEFUNKEN PATENT

    发明人: BRUCH WALTER DR

    IPC分类号: H04N9/64 H04N1/46 H04N5/42

    CPC分类号: H04N9/643

    摘要: CIRCUITS FOR MODIFYING THE COLOR INFORMATION CONTAINED IN A COLOR TELEVISION SIGNAL BY PRODUCING, FROM THE MODULATED PERMANENT SUBCARRIER OF THE ORIGINALLY PRODUCER VIDEO SIGNAL PORTION, AN ADDITIONAL SIGNAL WHOSE AMPLITUDE AND PHASE IS A PREDETERMINED FUNCTION OF THE AMPLITUDE AND PHASE OF SUCH PERMANENT SUBCARRIER, AND ADDING THE ADDITIONAL SIGNAL TO THE MODULATED PERMANENT SUBCARRIER OF THE ORIGINALLY PRODUCED

    VIDEO SIGNAL FOR PROVIDING A NEW PERMANENT SUBCARRIER CONTAINING COLOR INFORMATION WHICH IS MODIFIED RELATIVE TO THAT CONTAINED IN THE PERMANENT SUBCARRIER OF THE ORIGINALLY PRODUCED VIDEO SIGNAL.

    Chrominance subcarrier control in color television transmission
    2.
    发明授权
    Chrominance subcarrier control in color television transmission 失效
    彩色电视传输中的色彩分支控制

    公开(公告)号:US3590144A

    公开(公告)日:1971-06-29

    申请号:US76930768

    申请日:1968-10-21

    申请人: TELEFUNKEN PATENT

    发明人: BRUCH WALTER DR

    IPC分类号: H04N9/45 H04N11/16 H04N9/44

    CPC分类号: H04N9/45 H04N11/162

    摘要: A circuit for imparting to the chrominance subcarrier to a television transmitter a desired frequency and phase relationship with the horizontal synchronizing pulses of the video information signal, which circuit includes signal-processing means for deriving from the subcarrier a pulse signal which is at the horizontal synchronizing frequency and which bears the desired frequency and phase relation to the subcarrier, a phase comparator for comparing this pulse signal with the horizontal synchronizing pulses of the information signal, and control means connected between the phase comparator and the chrominance subcarrier generator for adjusting the subcarrier generator in such a manner as to bring the pulse signal into phase coincidence with the synchronizing pulses of the information signal.