Method and apparatus for interpolating pixels for format convers

Details Method and apparatus for interpolating pixels for format convers Method and apparatus for interpolating pixels for format convers

1996-09-30

1998-09-15

Burgess, Glenton B.

Television

Format conversion

348445, 348443, 348454, 348458, H04N 701

Patent

active

058086889

ABSTRACT:
An interpolation method and apparatus for converting pixels according to image formats, prevents deterioration of picture quality by performing a bilinear conversion which uses a larger number of pixels than does the conventional interpolation method which uses only two pixels. When a ratio between an interpolation point and a vertical line of unconverted pixels is .DELTA.1, a ratio between the interpolation point and a horizontal line of unconverted pixels is .DELTA.2, and eight unconverted pixels A1-A4 and B1-B4 on two lines adjacent to the interpolation position are used along with a coupling coefficient .alpha., a final interpolation signal I is generated according to the following equations:

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patent: 5534934 (1996-07-01), Katsumata et al.
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patent: 5598218 (1997-01-01), Inoue
patent: 5642169 (1997-06-01), Yamamoto et al.

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