Digital video camera suppressing low-saturation chrominance

Details Digital video camera suppressing low-saturation chrominance Digital video camera suppressing low-saturation chrominance

1993-04-14

1994-08-09

Powell, Mark R.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348646, 348242, H04N 968

Patent

active

053370830

ABSTRACT:
A digital video camera includes a pseudo-saturation calculating circuit by which a pseudo-saturation corresponding to an actual saturation is calculated on the basis of two color difference signals, and a suppression coefficient is calculated by a suppression coefficient calculating circuit on the basis of the pseudo-saturation. Each of the color difference signals are outputted by a selecting circuit in a dot sequential manner, and multiplied by the suppression coefficient in a multiplying circuit. Therefore, a signal in which a low-saturation chrominance signal is outputted from the multiplying circuit, whereby the low-saturation chrominance signal can be suppressed even though a sampling frequency is not increased.

REFERENCES:
patent: 4712132 (1987-12-01), Soca
patent: 4953011 (1990-08-01), Mori et al.
patent: 5124786 (1992-06-01), Nikoh

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