Chrominance encoding for a widescreen television system

DETAILED DESCRIPTION What is claimed is: 1.
In a system for processing a television type video signal including first and second sampled data components, apparatus comprising: means for providing an auxiliary signal; means for providing a difference signal representing the difference between (a) a single numerical value representation of a predetermined weighted average of said first component information and (b) original first component information; and means for modulating said auxiliary signal with said difference signal.
2.
Apparatus according to claim 1, wherein: said first and second components are chrominance and luminance components respectively.
3.
Apparatus according to claim 1, wherein: said average information is conveyed during an interval containing information normally not intended to be seen by a viewer.
4.
Apparatus according to claim 3, wherein said interval is a horizontal blanking interval.
5.
Apparatus according to claim 4, wherein said average information is conveyed during the back porch portion of a horizontal blanking interval.
6.
Apparatus according to claim 2, wherein said auxiliary signal exhibits a field alternating phase unlike that of a standard chrominance subcarrier.
7.
In a system for receiving a television-type video signal including first and second sampled data components, and an auxiliary signal modulated by a difference signal representative of the difference between (a) a single numerical value representation of a predetermined weighted average of first component information and (b) original first component information; apparatus comprising: signal processing means including means for demodulating said auxiliary signal to produce a demodulated signal including said difference signal; means for processing said difference signal to provide original first component information; and means for combining said original first component information and second component information.
8.
Apparatus according to claim 7, wherein said first and second components are chrominance and luminance components respectively; and said system further includes means for providing a reference signal to said demodulating means having a field reversing phase unlike that of a standard chrominance subcarrier