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US Patent 4870481 - Color television signal transmission system and improved-definition receiver for use in the system
US Patent Issued on September 26, 1989
Estimated Patent Expiration Date:
December 1, 2007Estimated 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.
Estimated Patent Expiration Date:
December 1, 2007Estimated 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.AbstractA color television signal transmission system in which, at the transmitter end the frequency bandwidths of the brightness and chrominance signals are extended by two to three times as compared with the NTSC system to improve horizontal resolution and color reproducibility. At the receiver end, the received composite signal is subjected to both interframe separation and picture adaptive separation to provide two brightness signals and two chrominance signals. A combined brightness signal is formed by adding the two brightness signals after they have been multiplied by weights which are determined on the basis of picture movement, and a combined chrominance signal is formed in the same way. The combined brightness and chrominance signals are converted into red, green and blue color signals, and then the vertical resolution is improved by movement adaptive line interpolation. The transmission system has vertical resolution and horizontal resolution superior to the NTSC, IDTV, and EDTV systems, and furthermore can be realized by simpler and cheaper equipment than the HDTV system. | InventorApplicationNo. 07/127260 filed on 12/01/1987US Classes:348/451, Motion adaptive348/487, Broadband (e.g., occupying two adjacent channels or parts thereof)348/493Luminance plus dual-phase modulated color carrierExaminersPrimary: Chin, Tommy P.Attorney, Agent or FirmUS Patent References4598309, Television receiver that includes a frame store using non-interlaced scanning format with motion compensationIssued on: 07/01/1986 Inventor: Casey4742386Method and apparatus for encoding component digital video signals so as to compress the bandwidth thereof, and for decoding the same Issued on: 05/03/1988 Inventor: Wilkinson International ClassesH04N 7/015 (20060101)H04N 11/00 (20060101) H04N 11/24 (20060101) |
