Importance

Loading Importance Indicators...

Abstract

An arrangement for providing digital encoding and decoding of information, which encoding is performed on a standard TV video signal, is disclosed. The encoding scheme utilizes the four standard signals R, G, B, Y which are available from any color transmission system. These four signals are the luminance information, Y, the red chroma excitation level, R, the green chroma excitation level, G, and the blue chroma excitation level, B. The encoding arrangement utilizes the color subcarrier (3.579545 MHz) as a reference to derive a clock at 1/3 of the subcarrier frequency and a clock at 1/6 of the subcarrier frequency. Clocks at these frequencies are used to modulate the luminance and the chroma information. Apparatus for encoding and synchronized decoding are disclosed. The suggested portion, in the television signal, for the encoded data is within the vertical interval.

Loading the Abstract Image...

First Claim