A transient signal detection technique based on flatness measure

In perceptual audio coding, it is necessary to deal with the transient signals in a frame. A reasonable transient detection is a premise of the treatment. According to the characteristics of transient signals in time domain and frequency domain, a time-frequency transient detection method which uses flatness measure is proposed in this paper. Comparing with existing transient detection methods, transient signal detection technique based on flatness measure not only has advantages to reduce missed and misused detection, but also hardly produce redundant detection in low-energy transient segment. Simultaneously, the complexity of the algorithm adaptively changes with the apparent extent of the transient signal. Simulation results show that this method is high in detection accurancy and simple in algorithm realization.