Device for controlling an aspect ratio in tv-monitor integrated

Details Device for controlling an aspect ratio in tv-monitor integrated Device for controlling an aspect ratio in tv-monitor integrated

1997-02-24

1999-04-20

Flynn, Nathan

Television

Format conversion

Conversion between standards with different aspect ratios

348556, 348555, 348558, H04N 546, H04N 327, H04N 5445, H04N 701

Patent

active

058961771

ABSTRACT:
A device for controlling an aspect ratio in a TV-computer integrated wide screen receiver, includes an input signal select switch for selecting a television signal double-scanned or a computer monitor signal of a VGA mode, a gain controller for controlling a gain of the signal which is selected by the select switch, a clamp circuit for clamping the signal controlled by the gain controller, an analog/digital converter for converting the signal clamped by the clamp circuit, an aspect ratio conversion device for horizontally and vertically converting the digital signal sampled by the analog/digital converter; and a phase-locked loop connected to the analog/digital converter and the aspect ratio conversion device, for correcting an image distortion by controlling a converting clock speed.

REFERENCES:
patent: 4672443 (1987-06-01), Dischert et al.
patent: 4730215 (1988-03-01), Jose et al.
patent: 5168362 (1992-12-01), Yoshida
patent: 5243421 (1993-09-01), Nagata et al.
patent: 5576771 (1996-11-01), Van Tol

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