Sampling rate conversion using digital differential analyzers

Details Sampling rate conversion using digital differential analyzers Sampling rate conversion using digital differential analyzers

1996-08-12

1998-11-10

Peng, John K.

Television

Image signal processing circuitry specific to television

Special effects

348565, 348441, 348704, 348240, 364702, 327 7, 345 27, H04N 701

Patent

active

058351604

ABSTRACT:
Magnification/reduction is achieved by a single FIR filter under the control of a Digital Differential Analyzer (DDA) as would be used to simulate a perfectly straight line on a two-dimensional raster. The single FIR filter combines the processes of interpolation, filter, and decimation. The DDA is programmed with the desired magnification/reduction ratio and provides signals that control shifting of input samples into the FIR filter and selection of FIR coefficients for the FIR filter.

REFERENCES:
patent: 4870661 (1989-09-01), Yamada et al.
patent: 5119093 (1992-06-01), Vogt et al.
patent: 5212659 (1993-05-01), Scott et al.
patent: 5274469 (1993-12-01), Small et al.
patent: 5303321 (1994-04-01), Peaslee et al.
patent: 5305432 (1994-04-01), Kubota
patent: 5331346 (1994-07-01), Shields et al.
James D. Foley et al., "Computer Graphics, Principles and Practise," Second Edition, Addison-Wesley Publishing Co., Basic Raster Graphics Algorithms for Drawing 2D Primitives, pp. 72 to pp. 74.

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