Abstract: A traffic condition monitoring system with cameras for vehicle comprises four cameras, a front-or-rear control selector, a twin pictures cutting processor, a left-or-right camera selector, a picture display selector, a picture output selector and a monitor. The cameras are respectively installed at the left and right of the front and rear side of a vehicle body, and the front or rear control selector may choose front or rear cameras depending on the forward or backward driving of a vehicle. And the twin pictures cutting processor is employed to receive the signal of the cameras. The left-or-right camera selector may receive input image signals and input control signals of the left and right signal light from the front-or-rear control selector, and then decides to select a single picture from the left or right camera. The picture display selector can accept the input image signals from the twin pictures cutting processor and from left-or-right camera selector.

Abstract: This invention provides a digital television camera processing system and method for feature processing quantized image signals. A single frame memory is required since the frame memory is located prior to the luminance signal processing circuit and the chroma signal processing circuit. The signal processor provides full screen zoom, partial screen zoom, still picture function, mosaic function, and a combination of these functions. Selection of the function is accomplished with inputs to a memory timing control which controls the output sequencing of the frame memory.

Abstract: This invention provides a digital color encoder for digitizing color video signals. The encoder forms a digitized color video signal using logic function processing of the digitized luminance signal and color difference signals. The encoder provides an output signal equivalent to the luminance signal added to the color difference signals modulated by triangular wave functions and sampled at the sampling frequency. The sampling frequency is eight times the crominance subcarrier frequency. An analog video signal can easily be recovered from the digital video signal because the fundamental frequency of the triangular wave is easily separated from the higher order harmonics.