Method and apparatus for generating progressively scanned television information
AssigneeNew York Institute of Technology
InventorWilliam E. Glenn
Life of this patent
Estimating the term…
Abstract
A technique is disclosed for generating a progressively scanned video signal from an interlaced signal without the need for motion-adaptive processing. Low resolution information is obtained from the current interlaced field, and the remaining detail information is obtained from a stored signal that includes a prior field or fields. The obtained signal can then be displayed with progressive scanning at full resolution and without motion artifacts.
Claims8
A method for generating a progressively scanned video signal representative of images, comprising the steps of:
- deriving an interlaced relatively low spatial frequency video signal representative of said images, at a relatively fast frame refresh rate;
- deriving a relatively high spatial frequency video signal representative of said images, at a relatively slow frame refresh rate;
- converting said interlaced relatively low spatial frequency video signal to an interlaced relatively low spatial frequency video signal having an increased number of lines, the information for each converted field coming from a field of the original interlaced relatively low spatial frequency video signal;
- converting said relatively high spatial frequency signal to a relatively high spatial frequency signal having said relatively fast frame refresh rate, each field of said converted relatively high spatial frequency signal containing information from more than a single field of the original relatively high spatial frequency video signal;
- and
- combining the converted relatively low spatial frequency video signal and the converted relatively high spatial frequency video signal to obtain said progressively scanned video signal.
Apparatus for generating a progressively scanned video signal representative of images, comprising:
- means for deriving an interlaced relatively low spatial frequency video signal, representative of said images, at a relatively fast frame refresh rate;
- means for deriving a relatively high spatial frequency video signal, representative of said images, at a relatively slow frame refresh rate;
- means for converting said interlaced relatively low spatial frequency video signal to an interlaced relatively low spatial frequency video signal having an increased number of lines, the information for each converted field coming from a field of the original interlaced relatively low spatial frequency video signal;
- means for converting said relatively high spatial frequency signal to a relatively high spatial frequency signal having said relatively fast frame refresh rate, each field of said converted relatively high spatial frequency signal containing information from more than a single field of the original relatively high spatial frequency video signal;
- and
- means for combining the converted relatively low spatial frequency video signal and the converted relatively high spatial frequency video signal to obtain said progressively scanned video signal.
A method for converting an interlaced video signal to progressive format, comprising the steps of:
- separating said signal into high and low spatial frequency signals;
- combining video information from at least two fields of the high spatial frequency signals, and producing therefrom, a converted high spatial frequency signal at the field rate of the original interlaced video signal;
- converting the low spatial frequency signal to a signal having an increased number of lines, the information for each converted field coming from a field of the original separated low spatial frequency signal;
- and
- combining the converted high and low spatial frequency signals to obtain a signal for progressive display.
Dependencies are inferred from the claim text.