Television signal processing system including modulated auxiliar

Details Television signal processing system including modulated auxiliar Television signal processing system including modulated auxiliar

1991-07-12

1993-07-20

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 36, H04N 1106, H04N 1100, H04N 964

Patent

active

052298477

ABSTRACT:
In one embodiment an encoded compatible widescreen television signal includes first and second auxiliary carriers amplitude modulated with side panel chrominance information. The first and second auxiliary carriers exhibit a significant phase shift (e.g., 90.degree.) relative to a chrominance subcarrier modulated with main panel information, and exhibit phase reversal from field to field. In another embodiment, a phase shifted, amplitude modulated and field phase modulated auxiliary carrier is derived from a modulated chrominance subcarrier.

REFERENCES:
patent: 4091410 (1978-05-01), Citta
patent: 4839720 (1989-06-01), Isnardi
patent: 5053858 (1991-10-01), Koslou et al.
patent: 5070396 (1991-12-01), Isnardi et al.
patent: 5115301 (1992-05-01), Hurst, Jr.
patent: 5122868 (1992-06-01), Isnardi
Report by David Sarnoff Research Center, Princeton, N.J., to the Federal Communications Commission, System Description, Advanced Compatible Television, Dec. 31, 1989.

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