Television Interlace Pairing: Its Effect on Detail Response and Its Measurement

The loss in detail response which results from pairing in the camera and/or the monitor is investigated. It is shown that there are two components of degradation of the detail response. One is due to the displacement of one part of the image on one field relative to the rest of the image in the other field. This relative displacement causes a loss in detail response at all line numbers. The other component is a truncation of the detail response due to the inefficient sampling, when the sampling interval is nonuniform. Measuring methods for the determination of percentage pairing in both camera and monitor are suggested. These methods include both qualitative evaluation and quantitative measurement.