公开(公告)号：US3764735A

公开(公告)日：1973-10-09

申请号：US3764735D

申请日：1972-09-07

申请人： BOSCH FERNSEHANLAGEN

发明人： SCHNEIDER H ,  TREUSCH G ,  SACHER C

IPC分类号： H04N9/093 ,  H04N9/08

CPC分类号： H04N9/093

摘要： Red, green and blue color signals are doubly limited and amplified. A switching stage furnishes these signals to horizontal and vertical channels for effecting horizontal and vertical raster registration correction. The correction relative to the white (green) raster is made by furnishing first pulses in response to discontinuities in the color signals, triggering first and second monostable circuit means with the first pulses, the monostable circuit triggered by the white signal furnishing broad second pulses having a pulse width twice the pulse width of the narrow second pulses furnished by the second monostable circuit means. Third and fourth monostable circuit means then furnish primary and secondary third pulses in response to the trailing edge of the broad and narrow second pulses. The positive components of a first difference signal formed by taking the difference between the broad second pulses and the secondary third pulses are then added to the negative components of a second difference signal formed by subtracting the secondary third pulses from the primary third pulses. The resultant signal, after integration, is used as the correction signal.

摘要翻译： 红色，绿色和蓝色信号被双重限制和放大。 切换台将这些信号提供给水平和垂直通道，以进行水平和垂直光栅对准校正。 相对于白色（绿色）光栅的校正是通过响应于颜色信号中的不连续性而提供第一脉冲而进行的，用第一脉冲触发第一和第二单稳态电路装置，由白色信号触发的单稳态电路提供宽的第二脉冲， 由第二单稳态电路装置提供的窄的第二脉冲的脉冲宽度的两倍的脉冲宽度。 第三和第四单稳态电路装置随后响应于宽和窄的第二脉冲的后沿而提供初级和次级第三脉冲。 然后，通过取宽宽第二脉冲和次级第三脉冲之间的差而形成的第一差分信号的正分量被加到通过从初级第三脉冲中减去次级第三脉冲而形成的第二差分信号的负分量。 积分后的结果信号用作校正信号。