Schaltungen zur Erzeugung eines interpolarisierten Signals

摘要

In an interpolated signal producing circuit, amplitudes of a plurality of proximate pixel signals derived by delay circuits (202, 203) are compared in logical operating circuits (205 to 209) and the order of magnitudes of such pixel signals is determined, whereupon an interpolated signal is derived (210) which is intermediate between the largest and smallest amplitudes, for example, next to the largest or smallest amplitudes or an average thereof. The interpolated signal thus derived may be employed for sub-sampling, that is, doubling the number of pixels in each horizontal scanning line of a displayed video picture, for doubling the horizontal scanning lines in a field, or in compensating for drop-out.