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Details
Inventors: Isnardi, Michael A.;
Assignee: General Electric Company (Princeton, NJ)
Primary Examiner: Chin; Tommy P.
Assistant Examiner:
Attorney, Agent or Firm: Tripoli; Joseph S., Herrmann; Eric P., Kurdyla; Ronald H.

The luminance component of a video signal is processed to produce a luminance component with groups of mutually exclusive spatially correlated image pixels of identical value within each group. In one embodiment each group comprises vertically averaged pixels 1H apart within a field. In another embodiment each group comprises vertically averaged pixels apart within a frame. The chrominance component is similarly processed. The processed luminance and chrominance components are combined using an invertible algorithm involving additive and subtractive signal combination. At a decoder, the inverse of the combining algorithm is used to separate the combined signal into its constitutent luminance and chrominance component parts, without luminance-chrominance crosstalk.

DETAILED DESCRIPTION What is claimed is: 1.
A system for encoding video signal luminance and chrominance information, comprising: means for providing processed luminance information, exclusive of chrominance information, with groups of mutually exclusive correlated image information pixels of identical value within each group, said pixels within each group being separated by an odd number of image scanning lines within an image frame; means for providing processed chrominance information, exclusive of luminance information, with groups of mutually exclusive correlated image information pixels of identical value within each group, said pixels within each group being separated by an odd number of image scanning lines within an image frame, said chrominance information exhibiting opposite phase from one image scanning line to the next; and means for combining said processed luminance and chrominance information with an invertible algorithm to produce a combined encoded video signal.
2.
A system according to claim 1, wherein: said groups of luminance information pixels and said groups of chrominance information pixels respectively contain information obtained from pixels separated by one image scanning line (1H).
3.
A system according to claim 2, wherein: said means for providing processed chrominance information and said means for providing processed luminance information each include means for replacing original pixel values with pixel values obtained by averaging pixels 1H apart in a scanning field.
4.
A system according to claim 1, wherein: said groups of luminance information pixels and said groups of chrominance information pixels respectively contain information obtained from pixels separated by 263H within a frame.
5.
A system according to claim 4, wherein: said identical value for said pixels within each respective group is obtained by replacing original pixel values with pixel values obtained by averaging pixels 263H apart within an image frame.
6.
A system according to claim 1, wherein: said processed luminance information includes high frequency luminance information exclusive of low frequency information



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