Digital High-Pass Filters with Milder High-Pass Effect on Digital Images

New designs of low/high‐pass and mid‐pass/stop FIR digital filters

New designs of highly e8cient low=highand mid-pass=stop (centre-symmetric band-pass=stop) FIR non-recursive digital 0lters are presented. The designs are based on the modulation property of DFT, applied to the already presented MAXFLAT halfband low-pass 0lters. The presented 0lters have explicit formulas for their tap-coe8cients, and therefore are very easy to design. They have highly smooth fr...

Efficient Digital Filters with Variable Cut-off Based on All-pass and Sharpening Digital Filters

All-pass digital filters are known as excellent prototype filters in many applications, such as control systems, signal processing and communications. Efficient filters can be designed because transfer function is very robust to small element changes. The drawback of digital filters based on all-pass filter sections is that they are not suitable for tuning and the design of filters with variabl...

High Pass Digital FIR Filter Design Using Differential Evolution

Digital Filters are generally used in the present era of communication and computation. Good performance of Digital filters is demanding one & hence it’s a challenge to design a digital finite impulse response (FIR) filter satisfying all the necessary and required conditions. Various artificially intelligent optimization techniques evolve for optimized design of digital filter. This paper demon...

High-performance variable band-pass/band-stop state-space digital filters using Gramian-preserving frequency transformation

Designing IIR Digital All-Pass Filters by Successive Projections Method

The transfer function of IIR all-pass filters is a rational function of ω. However, the optimization of such a rational function using the successive projections method, which has a wider range of application than the Remez algorithm, has not been presented. In this paper, we propose designing IIR allpass filters using the successive projections method. key words: successive projections method,...