Colour signal processing circuit for video recorder - has crispening circuit and two-line delay line, and adds colour difference signals from two picture lines

摘要

The video recorder reproduces the colour signal from a frequency modulated colour carrier signal. The colour signal, e.g. the line-sequential colour difference signals (R-Y,B-Y), is processed by an edge steepening circuit e.g. a colour transient improver (12) and/or a two-line delay line (19) in which the colour signals from two lines are added. The delay line may be part of a drop-out compensation circuit in which the colour signal of line n is replaced by the signal present for line n-2. A CCD-line may be used as the two-line delay line, and an amplitude limiter included. ADVANTAGE - Increased picture sharpness and improved signal-to-noise ratio.