Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1984-01-16
1986-05-13
Masinick, Michael A.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 16, 358 11, H04N 1106, H04N 1114, H04N 1120
Patent
active
045890110
ABSTRACT:
A television system having a fully compatible high-definition signal receivable at conventional resolution by conventional TV receivers without auxiliary apparatus with one TV channel carrying the conventional TV signal while high-frequency luminance and chrominance information is provided in a second TV channel. The high-frequency chrominance information is transmitted as two single sideband signals in the second TV channel. The baseband signal containing the high-frequency luminance components is derived from the lower sideband output of a product modulator whose inputs are taken from an anti-alias filtered camera which produces wideband luminance information and a local oscillator whose frequency is a multiple of the conventional chrominance subcarrier frequency embedded in the conventional baseband signal. The high-frequency chrominance information comprises Q' and I' segments and an encoder circuit is responsive to those segments to initially encode each segment into a pair of double sideband signals and then to suppress lower sideband signals before transmission of the upper sideband signals to the receiver. In addition, the encoder gates a tone burst signal defining the phase of the carrier into the vertical retrace interval. The receiver is responsive to the high-frequency chrominance information represented by the two transmitted single sideband signals to first recreate the missing lower sideband signals by multiplying the transmitted upper sideband signals by twice the carrier frequency thus producing a sum-difference signal. The difference portion of the sum-difference signal is the missing lower sideband signals. After combining the recreated lower sideband signals with the transmitted upper sideband signals, conventional quadrature detection methods are utilized to recover the Q' and I' portions of the high-frequency chrominance information. The receiver uses the tone burst signal in the generation of the carrier phase.
REFERENCES:
patent: 2987617 (1961-06-01), Loughlin
patent: 4476484 (1984-10-01), Haskell
patent: 4485401 (1984-11-01), Tan et al.
patent: 4520385 (1985-05-01), Jackson et al.
patent: 4521803 (1985-06-01), Gittinger
patent: 4543598 (1985-09-01), Oliphant
"Compatible Systems for High-Quality Television", SMPTE J., R. N. Jackson and M. J. J. C. Annegarn, vol. 92, No. 7, pp. 719-723, Jul. 1983.
"Extended Definition Television with High Picture Quality", SMPTE J., B. Wendland, vol. 92, No. 10, pp. 1028-1035, Oct. 1983.
"The Problems and Promises of High-Definition Television", IEEE Spectrum, R. K. Jurgen, vol. 20, No. 12, pp. 46-51, Dec. 1983.
"An Evolutionary Aproach to High Definition Television", in Proc. 16th Annual SMPTE Television Conference (Tomorrow's Television), C. W. Rhodes, pp. 186-197, Feb., 1982.
"A Compatible High Fidelity TV Standard for Satellite Broadcasting", in Proc. 16th Annual SMPTE Television Conference (Tomorrow's Television), T. W. Robson, pp. 218-236, Feb. 1982.
"High Definition Television Systems: Desirable Standards, Signal Forms, and Transmission Systems", IEEE Trans. Comm., T. Fujio, vol. COM-29, No. 12, pp. 1882-1890, Dec., 1981.
AT&T Bell Laboratories
Dunnam Michael P.
Masinick Michael A.
Moran John C.
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