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热词
    • 36. 发明授权
    • Encrypted signal detection circuit and video device using the same
    • 加密信号检测电路和视频设备使用相同
    • US08320564B2
    • 2012-11-27
    • US12760531
    • 2010-04-14
    • Gui-Dong Zhu
    • Gui-Dong Zhu
    • H04N7/167
    • H04N7/171H04N21/42623H04N21/44008H04N21/44055
    • A video device includes a video signal generation circuit, an encrypted signal detection circuit and a central processing unit (CPU). The encrypted signal detection circuit detects encrypted messages in video signals output from the video signal generation circuit and outputs stable trigger control signals to the CPU, which includes an amplifier circuit, a separation circuit, a reverse circuit, a delay circuit and a trigger circuit. The video signals are amplified via the amplifier circuit and negative phase pulse signals are extracted from the video signals via the separation circuit. The reverse circuit converts the negative phase pulse signals to positive phase pulse signals that are delayed via the delay circuit. The trigger circuit outputs the stable trigger control signals based on the delayed positive phase pulse circuit.
    • 视频设备包括视频信号产生电路,加密信号检测电路和中央处理单元(CPU)。 加密信号检测电路检测从视频信号发生电路输出的视频信号中的加密消息,并向CPU发送稳定的触发控制信号,CPU包括放大器电路,分离电路,反向电路,延迟电路和触发电路。 通过放大电路对视频信号进行放大,通过分离电路从视频信号中提取负相脉冲信号。 反相电路将负相位脉冲信号转换为通过延迟电路延迟的正相脉冲信号。 触发电路基于延迟正相脉冲电路输出稳定的触发控制信号。