Television receiver with scan velocity modulation being adjusted

Details Television receiver with scan velocity modulation being adjusted Television receiver with scan velocity modulation being adjusted

1993-01-21

1994-09-27

Powell, Mark R.

Television

Image signal processing circuitry specific to television

Transition or edge sharpeners

348571, H04N 332, H04N 546

Patent

active

053510941

ABSTRACT:
In a high quality TV receiver and an oblong standard TV receiver, when a TV signal having a smaller aspect ratio than those receivers is received, ugly pictures due to ringings and the like are adapted not to appear on the CRT screen surface even if a velocity modulation circuit is provided. An input TV signal having a small aspect ratio is structured from an image conversion circuit which includes a scanning time proportionate to an increasing aspect ratio of the TV receiver and a velocity modulation switch circuit which controls the operation of a velocity modulation circuit 16.

REFERENCES:
patent: 4670784 (1987-06-01), Goldberg
patent: 4760455 (1988-07-01), Nagashima
patent: 5072300 (1991-12-01), Anderson
patent: 5164829 (1992-11-01), Wada
patent: 5193006 (1993-03-01), Yamazaki

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