Television – Format conversion – Changing number of lines for standard conversion
Patent
1996-12-20
1998-11-17
Kostak, Victor R.
Television
Format conversion
Changing number of lines for standard conversion
348445, 348441, 348448, H04N 701
Patent
active
058383816
ABSTRACT:
The present invention aims at providing an image display apparatus capable of displaying both a television signal and an image signal supplied from a personal computer with a high picture quality on a high definition display unit having 1024 by 768 pixels. In order to achieve this object, an image display apparatus according to the present invention includes an NTSC-VGA conversion circuit for converting a television signal to a signal having 640 by 480 pixels and corresponding to the non-interlacing VGA standard, a switch unit for selecting and outputting either the signal outputted from the NTSC-VGA conversion circuit and an inputted image signal from a personal computer, and a VGA-XGA conversion circuit for converting a number of pixels of a signal outputted from the switch unit to a number of pixels 1024 by 768 substantially equivalent to the number of the display unit.
REFERENCES:
patent: 4872054 (1989-10-01), Gray et al.
patent: 5208669 (1993-05-01), Richards
patent: 5218436 (1993-06-01), Sugiyama et al.
Akiyama Fumiyoshi
Kasahara Yasuhiro
Kitamura Makoto
Matono Takaaki
Matsuzawa Toshihiko
Hitachi , Ltd.
Kostak Victor R.
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