A low cost, general purpose S-video, PAL/NTSC encoder

Author

Perkins, Geoffrey W. ; Clayton, Kenneth W.

Author_Institution

Motorola Inc., Tempe, AZ, USA

Volume

38

Issue

3

fYear

1992

fDate

8/1/1992 12:00:00 AM

Firstpage

512

Lastpage

517

Abstract

The device is used to encode red, green, and blue (RGB) color difference signals from a camera, computer graphics system, or some other originating generator into the established PAL or NTSC standards. In addition to the color composite video output, separate chrominance and luminance S-video signals are generated for improved display and video recording quality. All three outputs have 75-Ω drive capability and are available concurrently. The RGB inputs require 700 mV p-p for 100% color saturation and for 700 mV p-p at the 75-Ω video output loads. The device may be phase locked to an external 4.43-MHz or 3.58-MHz subcarrier source, driven from an external four times subcarrier frequency clock or free run from the internal four times subcarrier frequency crystal oscillator. The device was fabricated using a 2-μm oxide isolated 4-GHz bipolar process, had 20 pins, and operated from a single 5-V supply

Keywords

bipolar integrated circuits; encoding; television standards; video signals; 2 micron; 3.58 MHz; 4 GHz; 4.43 MHz; 5 V; 700 mV; 75 ohm; NTSC standards; PAL standards; RGB inputs; S-video signals; camera; chrominance signals; clock; color composite video output; color difference signals; color saturation; computer graphics system; crystal oscillator; display quality; luminance signals; oxide isolated bipolar process; subcarrier frequency; subcarrier source; video output loads; video recording quality; Cameras; Clocks; Computer displays; Computer graphics; Costs; Frequency; Oscillators; Pins; Signal generators; Video recording;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.156730

Filename

156730