Television – Format conversion – Conversion between standards with different aspect ratios
Patent
1997-07-03
1999-12-21
Lee, Michael
Television
Format conversion
Conversion between standards with different aspect ratios
348913, H04N 701
Patent
active
RE0364568
ABSTRACT:
The present invention provides a video signal conversion method for displaying a video signal having a 4:3 aspect ratio on a screen having a 16:9 aspect ratio by using a single clock. The video signal conversion comprises the steps of inserting two zero pixels between two pixels of the 4:3 video signal, [band] low pass filtering the two pixels of the 4:3 video signal, such that [3/4 of the bandwidth of the pixels is passed and upper and lower parts of pixels are not passed,] the 3/4 band of the upper part and the lower part of the spectrum are respectively passed, and sampling the filtered pixels by every fourth transition of a clock signal, and then displaying the sampled pixels on the 16:9 screen.
REFERENCES:
patent: 5243421 (1993-09-01), Nagata et al.
patent: 5323235 (1994-06-01), Tonomura et al.
patent: 5347313 (1994-09-01), Choi
patent: 5386236 (1995-01-01), Hong
R. W. Hamming, Digital Filters, Englewood Cliffs, NJ: Prentice-Hall, Inc., 1977, pp. 95-98, 218-219.
Lee Michael
Samsung Electronics Co,. Ltd.
LandOfFree
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