Television – Image signal processing circuitry specific to television – Special effects
Patent
1997-06-25
2000-05-16
Peng, John K.
Television
Image signal processing circuitry specific to television
Special effects
348445, 348448, 348556, 348913, H04N 701
Patent
active
060644443
ABSTRACT:
A picture processing apparatus and method for enlarging and reducing a picture wherein when a picture is reduced, horizontally adjacent pixel data is supplied from a delaying device to a horizontally interpolating circuit. With the pixel data, a coefficient p and a 1's complement (1-p) thereof supplied from an interpolation coefficient circuit, an interpolating process in the horizontal direction is performed. In addition, a pixel at the position of p=1 is thinned out. Pixel data that has been interpolated in the horizontal and vertical directions and that has been thinned out is written to a memory. When a picture is enlarged, pixel data that is read from a memory is delayed by two line memories and two adjacent pixels are properly selected by a switch circuit. A vertically interpolating circuit performs an interpolating process in the vertical direction. When pixel data is read from the memory, particular pixel data is read twice depending on a magnification. In the horizontal direction, likewise, an interpolating process is performed in the similar manner and an enlarging process is performed.
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Miyazaki Shinichiro
Ono Takeshi
Shirahama Akira
Ueki Nobuo
Maioli Jay H.
Peng John K.
Sajous Wesner
Sony Corporation
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