Method of compatibly increasing resolution in a color television

Details Method of compatibly increasing resolution in a color television Method of compatibly increasing resolution in a color television

1987-11-30

1989-01-24

Shepperd, John W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 21V, 358138, H04N 712, H04N 7087

Patent

active

048004278

ABSTRACT:
Method of compatibly increasing the resolution in a color television system employing offset modulation at the transmitter and offset demodulation at the receiver and transmitting a reference signal during the vertical blanking interval. The reference signal includes two components of which the first component contains phase information regarding the spectral addition at the receiver and the second component contains information regarding the offset modulation phase. Thus offset demodulation is realized at the receiver while retaining compatibility with existing television standards.

REFERENCES:
patent: 2810780 (1957-10-01), Loughlin
patent: 3334301 (1967-08-01), Sarkany et al.
patent: 3372228 (1968-03-01), Law
patent: 4485395 (1984-11-01), Warren
patent: 4485401 (1984-11-01), Tan et al.
patent: 4521803 (1985-06-01), Gittinger
patent: 4621286 (1986-11-01), Reitmeier et al.
patent: 4626913 (1986-12-01), Gurumurthy

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