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directional filter

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directional filter [də′rek·shən·əl ′fil·tər]
(electronics)
A low-pass, band-pass, or high-pass filter that separates the bands of frequencies used for transmission in opposite directions in a carrier system. Also known as directional separation filter.


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This transform is based on a double filter bank structure by combining the Laplacian pyramid with a directional filter bank [14].
Chapters have been added on 10D multirate and directional filter banks; on nonlinear filtering using statistical signal models and for image denoising; and on video demosaicking filters, and the chapters on linear and bilinear operators and matrices, passive circuit elements, bipolar junction transistor amplifiers, and symbolic analysis are among those that have been substantially revised.
Time-domain averaging is a computer-driven sequential digital process based on the vector analysis of three orthogonal ECG leads (X, Y, and Z) that separates and extracts high-frequency late potentials from lower frequency ST segments by the use of directional filters, enabling filter output to correspond in time to signal input.
 
 
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