HDTV to NTSC transcoder system

Details HDTV to NTSC transcoder system HDTV to NTSC transcoder system

1998-01-13

1999-07-06

Kostak, Victor R.

Television

Format conversion

Progressive to interlace

348445, H04N 701

Patent

active

059203544

ABSTRACT:
Image signals are transcoded from a first format to a second format, by employing multi-tap horizontal and vertical filters. The first format has higher horizontal and vertical resolution than the second format. The multi-tap horizontal filter filters lines of the image signals to convert the horizontal resolution of the first format into the horizontal resolution of the second format, wherein the horizontal filter has a filter tap ratio selected in accordance with the horizontal ratio of the first format to the second format. The multi-tap vertical filter for filtering columns of the image signals to convert the vertical resolution of the first format into the vertical resolution of the second format, wherein the vertical filter has a filter tap ratio selected in accordance with the vertical ratio of the first format to the second format.

REFERENCES:
patent: 4872054 (1989-10-01), Gray et al.
patent: 5355328 (1994-10-01), Arbeiter et al.
patent: 5497198 (1996-03-01), Kim
patent: 5587742 (1996-12-01), Hau et al.
patent: 5781241 (1998-07-01), Donovan

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