Tidfrekvensinformasjon
Tidfrekvensinformasjon, also known as time-frequency information, is a concept used to describe and analyze signals that change over time. It combines information about both the frequency content of a signal and how that frequency content evolves throughout the signal's duration. Traditional signal analysis often separates time and frequency. For instance, a Fourier transform reveals the overall frequency components present in a signal, but it loses information about when those frequencies occur. Conversely, analyzing a signal solely in the time domain shows how its amplitude changes, but doesn't easily reveal its spectral characteristics.
Time-frequency analysis provides a way to overcome these limitations by representing a signal in a two-dimensional
The applications of time-frequency information are widespread. In audio processing, it's used for speech recognition, music