公开(公告)号：US4794457A

公开(公告)日：1988-12-27

申请号：US113157

申请日：1987-10-27

申请人： Claude Gillet ,  Gerard Voisin ,  Jean-Francois Bruyeres-Inza

发明人： Claude Gillet ,  Gerard Voisin ,  Jean-Francois Bruyeres-Inza

IPC分类号： H04N5/217 ,  H04N5/208

CPC分类号： H04N5/2173

摘要： The circuit disclosed can be used to process synchronous video signals, especially those coming from two standard CCD sensors. It comprises two channels connected at the output to the two inputs, respectively, of an adder circuit which gives the mixed video signal. The first channel comprises a subtractor circuit which receives the two video signals, a high-frequency filter circuit to eliminate the low-frequency spectrum ranging between 0 and a determined limit frequency, an amplifier circuit to balance the gain of the two channels and a fast change-over/sampler circuit connected to the first input of the adder during half of each dot cycle, while the second input of the adder continually receives one of the video signals. The mixed signal thus comprises an unchanged low-frequency component which eliminates faults in the sensors related to non-homogeneity. The high-frequency component recovered corresponds to the first signal during the first half of the dot cycle and to the second signal during the second half of the dot cycle.

摘要翻译： 所公开的电路可用于处理同步视频信号，特别是来自两个标准CCD传感器的信号。 它包括分别连接到给出混合视频信号的加法器电路的两个输入端的两个通道。 第一通道包括一个接收两个视频信号的减法器电路，一个高频滤波器电路，用于消除在0和一个确定的极限频率之间的低频谱范围，放大器电路平衡两个通道的增益和一个快速 在每个点周期的一半期间连接到加法器的第一输入的转换/采样器电路，而加法器的第二输入端连续地接收视频信号之一。 因此，混合信号包括不变的低频分量，其消除了与非均匀性相关的传感器中的故障。 恢复的高频分量对应于在点周期的前一半期间的第一信号和在点周期的后半段期间的第二信号。