Abstract: A video multiviewer system may include a plurality of video scalers operating in parallel for generating initially scaled video streams by performing video scaling in at least one dimension on a plurality of video input streams. The video multiviewer system may also include a processing unit coupled downstream from the video scalers for generating additionally scaled video streams by performing additional video scaling on the initially scaled video streams, and a display cooperating with the processing unit for displaying multiple video windows based upon the additionally scaled video streams.

Abstract: A method of enabling an increase in the vertical definition of a transmitted television signal while preserving its bandwidth including the steps of decimating alternate lines of the television signal and reinterpolating untransmitted alternate lines upon reception. The decimation is accomplished by diagonally filtering the television signal in two dimensions to form a figure of five sample structure. Every other line is then added to the line adjacent to it so that half the lines are available for transmission, each line comprising folded-in high frequency information about missing line samples. Prior to transmission, bnadwidth is converted by filtering the signal to be transmitted at a skew-symmetric low pass filter. Apparatus for encoding and decoding the television signal each includes a two dimensional diagonal filter and line switching and control circuitry. The storage of a full field of a sample data is not required for processing in accordance with the present method.

Abstract: Synchronization between a transmitter and a receiver is effected by encoding and transmitting a synchronization pulse as a series of m first waveforms followed by a series of n second waveforms. The first and second waveforms are of the same duration and are transmitted in phase with each other; and m and n are positive real numbers, with m greater than one. The second waveform is different from, and preferably negatively correlated with, the first. When the receiver detects a series of first waveforms in the received signal, it locally generates a series of (either first or second) waveforms and correlates the locally-generated signal with the received signal. A change in correlation is detected as the synchronization pulse.