| 摘要 |
Apparatus for controlling the field or frame store signal processing of standard and nonstandard video signals is disclosed. The apparatus includes a nonstandard signal detector which compares the received horizontal sync signals to a horizontal sync signal generated internally be counting down a clock signal having a frequency proportional to the color subcarrier frequency. The detector produces a control signal which is in one state when the horizontal sync signals are substantially in coincidence and in a second state otherwise. This control signal is applied to apparatus which switches from field or frame store signal processing apparatus to alternative signal processing apparatus, which does not include a field or frame memory, to minimize distortion of the image when nonstandard signals are processed. |
