Image display apparatus with line number conversion

Details Image display apparatus with line number conversion Image display apparatus with line number conversion

1996-05-02

1998-05-19

Kostak, Victor R.

Television

Format conversion

Line doublers type

348458, H04N 701

Patent

active

057542449

ABSTRACT:
The invention concerns an image display apparatus having a non-interlaced display screen having a first number of display lines, to which an interlaced video signal (RGB-1) having a second number of video lines per field is applied, whereby the first number exceeds the second number but falls below twice the second number. A first line memory device (F1) is used for doubling the line number of the video signal (RGB-1). Second (F2) and third (F3) line memory devices each receive video lines of the line number doubled video signal, and provide a pair of video lines (RGB*, RGB**) at a reduced rate corresponding to the first number of display lines. An interpolator (7) provides the first number of display lines (RGB-2) to the display in response to the pair of video lines (RGB*, RGB**) received from the second (F2) and third (F3) line memory devices.

REFERENCES:
patent: 3830971 (1974-08-01), Van de Polder
patent: 5301031 (1994-04-01), Eot et al.
patent: 5381182 (1995-01-01), Miller et al.
patent: 5446498 (1995-08-01), Boon
patent: 5473382 (1995-12-01), Nohmi et al.
patent: 5530482 (1996-06-01), Gove et al.

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