Transient detection with absolute discrete group delay

This paper presents a new transient detection algorithm which uses the average absolute discrete group delay as a measure for the transient characteristic of sound. It shows that a bell-shaped window function performs a high-pass effect to the spectral coefficients, leading to a concentration of group delay values in the ¿-area for steady-state signals. This concentration is violated if a transient occurs. From this phenomenon, we derive a new transient detection method, improve it by a maximum order-filter, and show that it works well on percussive and tonal-percussive sounds.