Spatial-temporal frequency interleaved processing of a television signal with reduced amplitude interleaved sections
Patent 4621286 Issued on November 4, 1986. Estimated Expiration Date: 
May 29, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 29, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2686831 2716151 3871019 InventorsAssigneeApplicationNo. 06/615094 filed on 05/29/1984US Classes:375/240.01Television or motion video signalExaminersPrimary: Shepperd, John W.Attorney, Agent or FirmInternational ClassH04N 7/12 (20060101)AbstractThe image represented by a video signal contains an associated image spectrum defined within a spatial-temporal frequency volume. From this video signal, a second video signal is produced that represents spatial-temporal carrier modulation of a spectral section of the image spectrum into an interleaved location adjacent the image spectrum. To reduce the visibility of aliasing artifacts, the interleaved spectral section is made to be of reduced amplitude relative to its original amplitude in the image spectrum. To reconstruct the spatial-temporal frequency spectrum of the image at the television receiver, the video signal containing the frequency interleaved spectrum is processed in a complementary manner that represents spatial-temporal carrier modulation of the interleaved section to restore that section to its original position in the image spectrum. At the same time, the amplitude of the restored section is increased.Other References
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