Panagiotis D. Hatziantoniou

Time-frequency mapping based on non-uniform smoothed spectral representations

For audio and acoustic system responses, the auditory system tends to smooth high frequency spectral regions and to register, mainly, low-frequency components of late echoes in the time domain. To model such processing, a theoretical model for non-uniform spectral smoothing is introduced allowing the choice of arbitrary frequency resolution profiles to match such auditory features. This generalized framework is extended to allow mapping of such smoothing spectra into the time domain.

PC-based room correction for audio

The characteristics and implementation of a complete software bundle consisting of a room acoustics measurement tool, an application for the calculation of the room correction filters and a plugin for real time audio filtering is described. Via this plug-in a non-experienced user should be able to follow the documentation, measure the impulse response of his listening room, calculate the appropriate stereo inverse filters and utilize them in order to equalize the audio input in real time. The proposed room equalization solution was evaluated in terms of subjective and objective performance.