1. High-Accuracy Length-6 Cubic Interpolators.
- Author
-
Deng, Tian-Bo
- Subjects
RADIO frequency ,LEAST squares software ,POLYNOMIALS ,INTERPOLATION ,FREQUENCY response ,SPEECH processing systems ,SIGNAL processing - Abstract
This letter proposes a frequency-domain weighted least-squares (WLS) method for designing a length-6 cubic interpolation kernel constructed by connecting three piecewise polynomials of third-degree, and the optimal coefficients are found through minimizing the weighted squared error between the desired and actual frequency responses of the length-6 cubic. This frequency-domain approach can design various cubics with different frequency responses by adjusting the weighting functions in different frequency bands, and even ignore “don't care” bands. An interpolation example is given to illustrate that the length-6 cubic can achieve much higher accuracy interpolations than the other interpolators with fixed frequency characteristics. [ABSTRACT FROM PUBLISHER]
- Published
- 2010
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