Digital signal processing is inherently band-limited by reconstruction filters

Evidence

D/A-conversion also typically includes a low-pass filter (reconstruction filter) to make the output continuous in time and free from frequencies above the Nyquist frequency. This means that digital signal processing deals with band-limited signals. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 406

Categorization

• DEFINE: Explains why DSP operates only on band-limited signals via the reconstruction filter.