Abstract: A method of correcting picture steadiness errors (or film weave correction) in telecine scanning is proposed, in which, in a first step, at least one sample area of the picture contents of the video signal obtained by film scanning is determined by way of structure recognition, this sample area corresponding to a curvature in the picture contents. In a second step, it is checked, by way of comparison, whether the determined sample areas are recognizable in a search area of the sequential frame. In a third step, motion vector signals are generated when the sample areas are recognized again in the sequential frame, these motion vector signals defining the direction of motion and the extent of deviation of the position of the determined sample area from the position of the recognized sample area. In a fourth step, parameters of a transform function are determined by the motion vector signals.

Abstract: A color television transmission systems including three-dimensional filtering operations at the transmitter and receiver ends with the object of obtaining a lowest possible number of interferences in the form of cross color and cross-luminance on display in which each one of the two color difference signal channels has its own three-dimensional sub-filtering operation, wherein the two sub-filters are dimensioned differently.

Abstract: In the transmission of a television signal containing a luminance signal between a transmitting station and a receiving station of a television system, the picture resolution at the receiving station is compatibly increased by: effecting planar prefiltering of the luminance signal at the transmitting station and a corresponding planar postfiltering of the luminance signal at the receiving station; effecting offset sampling or offset modulation of the luminance signal at the transmitting station and a corresponding sampling conversion or demodulation of the luminance signal at the receiving station; deriving an additional signal from the luminance signal for increasing picture resolution, reducing the amplitude of the additional signal at the transmitting station and transmitting the additional signal together with the original luminance signal to the receiving station; and increasing the amplitude of the additional signal at the receiving station to an extent corresponding to the reduction performed at the tr

Abstract: A high quality TV transmission system is devised including a preprocessing circuit controlled by motion present in the scene to be transmitted. In the absence of motion, processing circuit derives output picture field signals of a standard frequency from a single input picture field scanned at a higher frequency. In the presence of motion, all input picture fields scanned with high number of lines are stored in storing devices and processed by interpolating low pass filters and a multiplexer into output picture fields having the standard frequency but being free of aliansing interference.

Abstract: A TV transmission system having an increased picture quality. Depending on whether the picture to be transmitted is a still picture or a motion picture, the TV signals are derived either from the scanning of the scene or by interpolation from consecutive scanning lines. The scanning at the transmission side is performed at a higher number than the standard number of picture lines of the system.

Abstract: Band limited standard video signals are sampled with line coupled sampling clock pulses. The sampling clock pulses are shifted from field to field by one-half a sampling interval. The sampling clock pulse rate is twice the frequency at the center of the Nyquist edge of the transmission channel. The received signal is sampled in synchronism, line coupled and offset from field to field. A video memory records the sampled values and furnishes them to the monitor at twice the sampling frequency and without flicker as a full frame. The video playback takes place at twice the line frequency or alternatively with the same line frequency and synchronous spot wobbling.

Abstract: A system for permitting compatible communications among broadband and narrowband picture telephone installations, the bandwidth of a narrowband installation corresponding to the lower portion of the bandwidth of a broadband installation, in which the pictures associated with both types of installations have the same number of lines, the same line scanning frequency and the same frame rate, both the scanning of the subject image and playback are effected with a wave-shaped line scan for playback in a broadband installation, the signals in the transmitting portion of a broadband installation are split into a low frequency component, covering a bandwidth corresponding to that of a narrowband installation, and a high frequency component, and both components transmitted from a broadband installation are recombined in the receiving portion of a further broadband installation receiving the transmitted signals.