Over the years controversy has raged back and forth on whether brick wall filters used in digital audio (namely for CD playback systems) exhibit phase shifts in the audio band (20Hz to 20kHz). Audio ...

A while back, we reviewed some basics on how to apply digital filters to sort out signals with undesirable elements riding on top of them, i.e. a square wave that’s being corrupted by a sinusoidal ...

Digital signal processors (DSPs) continue to receive a great deal of attention in new product design. For example, digital filter design reflects the importance of understanding and using this ...

In real-time digital signal processing, the multirate transformation is a commonly used technique for interpolation and decimation. Comb-based decimation filters are used in wireless applications ...