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dorotsupuauto compensator

机译:多罗多普托科·彭萨托

摘要

PURPOSE:To attain accurate dropout compensation by controlling a reproduced video signal level via a 1H (1 horizontal period) delay circuit in following the fluctuation of an average level of the reproduced video signal. CONSTITUTION:A reproduced luminance signal demodulated by an FM demodulation circuit 2 is extracted from an output terminal 7 via an LPF 3, an amplifier 4, a switch circuit 5 and an amplifier 6. The reproduced video signal via a 1H elay circuit 8 is fed to a switch circuit 5, and if dropout takes place, the switch circuit 5 is controlled by an output of a dropout detection circuit 12 and a reproduced video signal before 1H is outputted from the output terminal 7. A monostable multivibrator 19 forms a timing pulse corresponding to the period of a pedestal level of a prescribed width from the synchronizing signal and the output of an AND gate 15 sample and holds the output of the amplifier 4 by using a sample-and-holding circuit 20, the switch circuit 21 is turned on and the output of the 1H delay circuit 8 is clamped in response to the level held by the circuit 20.
机译:目的:通过跟随1H(1个水平周期)延迟电路控制再现视频信号的电平,以跟随再现视频信号的平均电平的波动,实现精确的压差补偿。组成:由FM解调电路2解调的再现亮度信号通过LPF 3,放大器4,开关电路5和放大器6从输出端子7中提取。通过1H elay电路8馈送的再现视频信号开关电路5,如果发生跌落,则由跌落检测电路12的输出和在从输出端子7输出1H之前的再现视频信号控制开关电路5。单稳态多谐振荡器19形成定时脉冲。对应于来自同步信号和“与”门15的输出的规定宽度的基座电平的周期,并通过使用采样保持电路20对放大器4的输出进行采样并保持,开关电路21被接通接通,并且响应于电路20所保持的电平来钳位1H延迟电路8的输出。

著录项

  • 公开/公告号JPH0810924B2

    专利类型

  • 公开/公告日1996-01-31

    原文格式PDF

  • 申请/专利权人 ソニー株式会社;

    申请/专利号JP19860089561

  • 发明设计人 木村 勝己;

    申请日1986-04-18

  • 分类号H04N5/94;

  • 国家 JP

  • 入库时间 2022-08-22 04:02:01

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