公开(公告)号：EP1051029A3

公开(公告)日：2002-12-18

申请号：EP00302553.3

申请日：2000-03-28

申请人： Nokia Corporation

发明人： Haapakoski, Hannu ,  Salonen, Vesa ,  Vigelius, Kari

IPC分类号： H04N5/04 ,  H04N5/08

CPC分类号： G09G5/006 ,  G09G5/18 ,  H04N5/10

摘要： A method and a device for filtered sync signals detection wherein a timing circuit is used to select the steep slope portion in one or both of the leading edge and the trailing edge of the sync signals; a voltage divider or feedback path to set a triggering point at the steep slope portion of the selected edge regardless the slope being positive or negative; and a triggerable device is used to generate new sync signals with the leading edge of each sync pulse starts at one triggering point and the trailing edge starts at another triggering point. Alternatively, a micro-controller is used to detect the polarity of the sync signals and accordingly provide a reference voltage in order to set the triggering point at the leading edge of the sync signals.

公开(公告)号：EP1051029A2

公开(公告)日：2000-11-08

申请号：EP00302553.3

申请日：2000-03-28

申请人： Nokia Corporation

发明人： Haapakoski, Hannu ,  Salonen, Vesa ,  Vigelius, Kari

IPC分类号： H04N5/04 ,  H04N5/08

CPC分类号： G09G5/006 ,  G09G5/18 ,  H04N5/10

摘要： A method and a device for filtered sync signals detection wherein a timing circuit is used to select the steep slope portion in one or both of the leading edge and the trailing edge of the sync signals; a voltage divider or feedback path to set a triggering point at the steep slope portion of the selected edge regardless the slope being positive or negative; and a triggerable device is used to generate new sync signals with the leading edge of each sync pulse starts at one triggering point and the trailing edge starts at another triggering point. Alternatively, a micro-controller is used to detect the polarity of the sync signals and accordingly provide a reference voltage in order to set the triggering point at the leading edge of the sync signals.

摘要翻译： 一种用于滤波同步信号检测的方法和装置，其中使用定时电路来选择同步信号的前沿和后沿中的一个或两个中的陡峭斜率部分; 分压器或反馈路径，用于在所选边缘的陡倾斜部分设置触发点，而不管斜率为正或负; 并且可触发装置用于产生新的同步信号，每个同步脉冲的前沿从一个触发点开始，并且后沿从另一个触发点开始。 或者，微控制器用于检测同步信号的极性，并因此提供参考电压，以便将触发点设置在同步信号的前沿。