Video scan converter
AssigneeYves C. Faroudja
InventorsYves C. Faroudja, Charles A. Bialo
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Abstract
A video scan converter includes an input for receiving a video signal at a first scan rate, an output for providing a video signal at a second scan rate and a main path leading between the input and the output. The main path includes a scan line interpolation circuit and a time scale modification circuit which provide conventional two-dimensional scan conversion. A further path coupled to the main path dynamically alters the output of the scan line interpolation circuit in response to motion in the picture represented by the video signal, thus providing a three-dimensional scan conversion. The further path may be optional.
Claims19
An expansible video scan converter comprising:
- input means for receiving a video signal at a first scan rate,
- output means for providing said video signal at a second scan rate,
- a main signal path coupling said input means and said output means, said main signal path including
- line interpolation means for interpolating pixels in original scan lines of said video signal and for putting out interpolated scan lines comprised of pixels interpolated in the spatial domain,
- time scale modification means for combining original and interpolated scan lines into a video signal at the second scan rate, and
- optional further path insertion means between the line interpolation means and the time scale modification means, and
- removable connecting path means bridging the optional further path insertion means.
A video scan converter comprising:
- input means for receiving a video signal at a first scan rate,
- output means for providing said video signal at a second scan rate,
- a signal path coupling said input means and said output means, said signal path including
- interpolation means for interpolating pixels in original scan lines of said video signal and for putting out interpolated scan lines comprised of pixels interpolated in the spatial domain,
- time scale modification means for combining original and interpolated scan lines into a video signal at the second scan rate, and
- means for selectively modifying said spatial domain interpolated pixels as a function of temporal detail in said video signal, whereby said interpolated scan lines are both spatially and temporally interpolated.
Dependencies are inferred from the claim text.