directional filter

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.
References in periodicals archive ?
1990), vector directional filter (VDF) (Ponomaryov et al.
i, j, t] is the output of three dimensional generalized vector directional filter for a noisy pixel, i.
A directional filter could allow the sun's rays, which come in at a predictable angle, to pass through but prevent the escape of heat in the form of infrared light.
NSCT removes the subsampling sections in two-level implementations of Contourlet transform and is made up of Nonsubsampled Pyramid (NSP) and Nonsubsampled Directional Filter Bank (NSDFB) (See Figure 3).
The two-channel nonsubsampled filter adopted is as As both Nonsubsampled Pyramid Filter Bank and Nonsubsampled Directional Filter Bank satisfy the Bezout identity.
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.
The contour let transform developed by Do and Vetterli[8], is based on an efficient twodimensional (2-D) multiscale and directional filter bank that can deal effectively with images having smooth contours.
Revised and updated, the volume offers new chapters on 10D multirate and directional filter banks; nonlinear filtering using statistical signal models and for image denoising; and video demosaicking filters.
Tools he has created include the Critical Bars Indicator and the CB3 Directional Filter.
RFS' CW-series directional filters include Emmy[R] Award-winning, patented technology that enables high-power adjacent channel combining.
0 New Features Include Enhanced User Interface, Photo Support for Contacts, New Device Support, Ability to Set Directional Filters and Enhanced Customization Options
To optimize the microphone performance, the chamber was engineered to include directional filters, allowing sound to enter from only one direction -- the mouth.

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