Method and apparatus for scaling interlaced images

Details Method and apparatus for scaling interlaced images Method and apparatus for scaling interlaced images

1990-09-06

1991-06-18

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358160, 358180, H04N 514

Patent

active

050253158

ABSTRACT:
A method and apparatus for scaling interlaced video data allows the video data to be scaled to any desired size, either larger or smaller than the original image. The method considers each line of input data in each field sequentially, and determines whether the line is to be saved and whether the data lines in each successive field will also be saved, discarded, or duplicated, saving space in the output buffer for the saved and duplicated data lines to come as necessary. The method can accommodate interlaced data with N field and a scaling factor M. An apparatus for implementing the method for two header fields and scaling factor N is also described.

REFERENCES:
patent: 4402012 (1983-08-01), Knight
patent: 4578812 (1986-03-01), Yui
patent: 4746981 (1988-05-01), Nadan et al.
patent: 4866520 (1989-09-01), Nomura et al.

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