Method and circuit for extracting synchronization signals in a video signal
    1.
    发明申请
    Method and circuit for extracting synchronization signals in a video signal 失效
    用于提取视频信号中的同步信号的方法和电路

    公开(公告)号:US20050225676A1

    公开(公告)日:2005-10-13

    申请号:US10518828

    申请日:2003-06-23

    IPC分类号: H04N5/08 H04N5/10 H04N9/455

    CPC分类号: H04N5/10

    摘要: The invention relates a method of extracting synchronization signals from an input video signal (Csync) comprising horizontal synchronization pulses at the start of video lines, for generating a horizontal synchronization signal (Hsync), said method comprising:—a calculation step (105) for calculating the duration (D) of the video lines in said input video signal (Csync),—a forcing step (108) for forcing said input video signal (Csync) to an output level, said output level corresponding to the level of said input video signal (Csync) after the horizontal synchronization pulses, said input signal (Csync) being forced between the end of each horizontal synchronization pulse and a moment defined by a first percentage (X1) of said line duration (D), for generating said horizontal synchronization signal (Hsync). Use: Extraction of synchronization signals.

    摘要翻译: 本发明涉及一种从视频行开始处包括水平同步脉冲的输入视频信号(Csync)提取同步信号的方法,用于产生水平同步信号(Hsync),所述方法包括: - 计算步骤(105),用于 计算所述输入视频信号(Csync)中的视频行的持续时间(D), - 强制步骤(108),用于将所述输入视频信号(Csync)强制为输出电平,所述输出电平对应于所述输入的电平 视频信号(Csync),所述输入信号(Csync)被强制在每个水平同步脉冲的结束和由所述线路持续时间(D)的第一百分比(X 1)定义的力矩之间,用于产生所述 水平同步信号(Hsync)。 使用:提取同步信号。

    Method and circuit for extracting synchronization signals in a video signal
    2.
    发明授权
    Method and circuit for extracting synchronization signals in a video signal 失效
    用于提取视频信号中的同步信号的方法和电路

    公开(公告)号:US07705917B2

    公开(公告)日:2010-04-27

    申请号:US10518828

    申请日:2003-06-23

    IPC分类号: H04N5/10

    CPC分类号: H04N5/10

    摘要: The invention relates a method of extracting synchronization signals from an input video signal (Csync) comprising horizontal synchronization pulses at the start of video lines, for generating a horizontal synchronization signal (Hsync), said method comprising:—a calculation step (105) for calculating the duration (D) of the video lines in said input video signal (Csync),—a forcing step (108) for forcing said input video signal (Csync) to an output level, said output level corresponding to the level of said input video signal (Csync) after the horizontal synchronization pulses, said input signal (Csync) being forced between the end of each horizontal synchronization pulse and a moment defined by a first percentage (X1) of said line duration (D), for generating said horizontal synchronization signal (Hsync). Use: Extraction of synchronization signals.

    摘要翻译: 本发明涉及一种从视频行开始处包括水平同步脉冲的输入视频信号(Csync)提取同步信号的方法,用于产生水平同步信号(Hsync),所述方法包括: - 计算步骤(105),用于 计算所述输入视频信号(Csync)中的视频行的持续时间(D), - 强制步骤(108),用于将所述输入视频信号(Csync)强制为输出电平,所述输出电平对应于所述输入的电平 在所述水平同步脉冲之后的所述视频信号(Csync),所述输入信号(Csync)被强制在每个水平同步脉冲的结束与由所述线路持续时间(D)的第一百分比(X1)定义的力矩之间),以产生所述水平同步脉冲 同步信号(Hsync)。 使用:提取同步信号。

    A/D conversion device with dynamic input control
    3.
    发明授权
    A/D conversion device with dynamic input control 失效
    具有动态输入控制的A / D转换装置

    公开(公告)号:US5907300A

    公开(公告)日:1999-05-25

    申请号:US956751

    申请日:1997-10-23

    申请人: Philippe Belin

    发明人: Philippe Belin

    CPC分类号: H03M1/1295 H04N5/185 H04N9/72

    摘要: The invention relates to an A/D conversion device having an amplifier (A) which receives an analog input signal (Vin), in which device the voltage level of reference thresholds in the output signal (Vout�0:7!) resulting from the A/D conversion of the input signal (Vin) is maintained constant by means of a regulation module (CMP1, IS), controlling the voltage which is present at the terminals of a storage capacitor (Cs). According to the invention, such a device controls the average DC component of the input signal (Vin) in the purpose of limiting the amplitude of the variations of said signal (Vin), which variations might lead to a saturation of the amplifier (A).

    摘要翻译: 本发明涉及一种具有放大器(A)的A / D转换装置,该放大器接收模拟输入信号(Vin),在该装置中输出信号(Vout [0:7])中的参考阈值的电压电平 通过调节模块(CMP1,IS)将输入信号(Vin)的A / D转换保持恒定,控制存储在存储电容器(Cs)的端子处的电压。 根据本发明,为了限制所述信号(Vin)的变化幅度,这种装置控制输入信号(Vin)的平均DC分量,这种变化可能导致放大器(A)的饱和, 。

    A/D conversion device having a programmable transfer characteristic
    4.
    发明授权
    A/D conversion device having a programmable transfer characteristic 失效
    具有可编程传送特性的A / D转换装置

    公开(公告)号:US5990817A

    公开(公告)日:1999-11-23

    申请号:US956819

    申请日:1997-10-23

    CPC分类号: H03M1/1028 H03M1/183

    摘要: The invention relates to an A/D conversion device intended to supply at the output a digital signal Vout[0:7] resulting from the conversion of an analog input voltage Vin and receiving a control signal CRS used for defining the transfer characteristic of the device by way of comparison with the output signal Vout[0:7]. According to the invention, such a device comprises a reference module (AO, CMP2) which allows adjustment of the digital value of the output signal Vout[0:7] at a predetermined value when the analog input voltage Vin is zero, and means (Mx, Vact) for substituting for said voltage Vin a reference voltage Vref having a predetermined value when the device is in its control mode.

    摘要翻译: 本发明涉及一种A / D转换装置,其旨在在输出端提供由模拟输入电压Vin的转换产生的数字信号Vout [0:7],并接收用于定义装置的传送特性的控制信号CRS 通过与输出信号Vout [0:7]进行比较。 根据本发明,这种装置包括参考模块(AO,CMP2),当模拟输入电压Vin为零时,可以将输出信号Vout [0:7]的数字值调节到预定值, Mx,Vact),用于在设备处于其控制模式时,将具有预定值的参考电压Vref替换为所述电压Vin。

    A/D conversion device
    5.
    发明授权
    A/D conversion device 失效
    A / D转换装置

    公开(公告)号:US5982311A

    公开(公告)日:1999-11-09

    申请号:US956816

    申请日:1997-10-23

    申请人: Philippe Belin

    发明人: Philippe Belin

    摘要: A conversion device includes an A/D converter (8) and a control module for auto-adjustment of the DC component. This module includes an analog comparator (5) which performs a comparison between the analog signal (11) at the input of the A/D converter (8) and a reference voltage (10) produced on the basis of voltages which feed the resistance ladder (9) of the converter. In order that the control does not introduce noise into the signal supplied, the comparator (5) of the control module has a non-linear response with a reduced output/input gain for a range of the differential control signal centered around zero.

    摘要翻译: 转换装置包括A / D转换器(8)和用于DC分量自动调节的控制模块。 该模块包括模拟比较器(5),该模拟比较器(5)执行A / D转换器(8)的输入处的模拟信号(11)与基于馈送电阻梯的电压产生的参考电压(10)之间的比较 (9)。 为了控制不会在所提供的信号中引入噪声,控制模块的比较器(5)具有对于以零为中心的差分控制信号的范围具有减小的输出/输入增益的非线性响应。