Abstract: In a video camera, "shading ears" resulting from charge build-up beyond the ends of the scan lines of the normally scanned area of a camera tube target are eliminated by applying a voltage pulse to a lens electrode of the camera tube, the timing, amplitude, duration, and shape of the pulse being predetermined to extend the scan lines, and also to de-focus the electron beam.

Abstract: An aircraft passenger entertainment system projects three complementary color component images, preferably from a passenger cabin ceiling, onto a flat screen with the aid of three imaging devices, each of which presents a different color component image in an image display field, and three associated projecting devices including a lens for each imaging device. Each image display field is disposed in a plane which is either parallel to the plane of a flat display screen or which intersects the plane of the display screen along a line extending parallel to the cabin floor of the aircraft. Each of the mentioned projecting lenses has an axis which is either perpendicular to the plane of the display screen or which is disposed in one of three parallel planes extending between the cabin ceiling and floor at right angles to the display screen.

Abstract: Color television chrominance signal encoding is improved by alternately keying parallel modulators controlled by independent oscillators. Improved luminance signal encoding minimizing crosstalk is achieved by selected filtering, delay and threshold control in response to repetitive high signal level conditions. Circuitry for improving luminance signal encoding is described which is useful in both fm and am video signal processing applications. A preferred embodiment of an encoder is described which is operative according to the French SECAM standard.