Image display apparatus having a circuit for magnifying and proc

Details Image display apparatus having a circuit for magnifying and proc Image display apparatus having a circuit for magnifying and proc

1999-07-23

2000-11-21

Hsia, Sherrie

Television

Image signal processing circuitry specific to television

Special effects

348561, 348704, H04N 974, H04N 3223

Patent

active

061510793

ABSTRACT:
The present invention relates to a video signal processing apparatus for converting video signals based on a desired transmission system such as NTSC, PAL, MUSE or any other system so as to conform to a display unit of a desired screen system such as XGA, VGA or the like. The apparatus has a feature that it is provided with a PLL circuit for changing a sampling frequency used by an analog-to-digital converter for converting inputted video signals into digital signals in accordance with the sort of the transmission system of the video signals, and a controller for controlling picture element interpolation of the digital signals performed by a picture image magnifying circuit for magnifying the video signals horizontally and vertically, in accordance with the sort of the transmission system of the video signals.

REFERENCES:
patent: 5008752 (1991-04-01), Van Nostrand
patent: 5739867 (1998-04-01), Eglit
patent: 6002810 (1999-12-01), Wakisawa

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