HDTV to conventional TV signal converting apparatus with non-lin

Details HDTV to conventional TV signal converting apparatus with non-lin HDTV to conventional TV signal converting apparatus with non-lin

1991-06-03

1994-05-10

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Gray scale transformation

348458, 348624, H04N 969

Patent

active

053112970

ABSTRACT:
A television signal converting apparatus receives a high definition television signal which is processed approximately linearly on the transmission and receiving sides and whose transmission only is processed non-linearly. A non-linear level correction circuit is provided, which collectively simultaneously carries out two kinds of non-linear processes, namely, a transmission inverse gamma correction and a CRT gamma correction, which are executed on the transmission side, thus precisely reproducing the signal level of a luminance signal by using a small-scale circuit.

REFERENCES:
patent: 5057919 (1991-10-01), de Haan et al.
patent: 5079622 (1992-01-01), Toshinobu

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