Apparatus and method for A/D conversion in a digital video...

Details Apparatus and method for A/D conversion in a digital video... Apparatus and method for A/D conversion in a digital video...

2007-01-23

2007-01-23

Tran, Trang U. (Department: 2622)

Television

Image signal processing circuitry specific to television

A/d converters

C348S571000

Reexamination Certificate

active

10639584

ABSTRACT:
An A/D conversion apparatus of a digital video system includes an A/D converter for converting an input analog video signal to a digital signal on the basis of a reference voltage value input from the outside and outputting the digital signal; and a reference voltage supplying portion for supplying the A/D converter with a predetermined number of the reference voltage value sequentially and repeatedly during a predetermined time period. Accordingly, since the quantization error can be minimized during the A/D conversion in the digital video system without increasing the number of the quantization bits, the image quality can be improved.

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patent: 4990914 (1991-02-01), Giancarlo
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patent: 5719638 (1998-02-01), Noda
patent: 6002445 (1999-12-01), Urayama
patent: 6703958 (2004-03-01), Noro
patent: 6989871 (2006-01-01), Saito

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