minimumfázisú

The term *minimumfázisú* is a Hungarian adjective derived from the phrase *minimum fázis*, which translates to "minimum phase" in English. In signal processing and audio engineering, the concept of minimum phase refers to a system or signal whose phase response contains the minimum possible phase shift for a given magnitude (or frequency response). This property is significant in various fields, including acoustics, telecommunications, and audio signal reconstruction.

A minimum phase system or signal has all its poles and zeros inside the unit circle in the complex plane, meaning it does not exhibit non-causal behavior or excessive phase delay. This ensures that the phase response is uniquely determined by the magnitude response, which simplifies analysis and synthesis of signals. In contrast, non-minimum phase systems or signals have some poles or zeros outside the unit circle, leading to phase shifts that cannot be derived solely from the magnitude response.

In audio applications, minimum phase processing is often preferred because it preserves the temporal integrity of sound signals. For example, when reconstructing a signal from its magnitude spectrum (such as in phase unwrapping or deconvolution), a minimum phase assumption ensures that the reconstructed signal closely matches the original in terms of timing and perceived quality. This is particularly useful in speech processing, music production, and noise reduction algorithms.

The concept is also relevant in control theory and digital signal processing, where minimum phase systems are desirable for stability and performance reasons. However, not all real-world signals or systems are inherently minimum phase, and techniques such as all-pass filtering or phase compensation may be applied to approximate minimum phase behavior when necessary.