VIRTUAL ACOUSTICS AND 3-D SOUND IN MULTIMEDIA SIGNAL PROCESSING

摘要: In this work, aspects in real-time modeling and synthesis of three-dimensional sound the context digital audio, multimedia, virtual environments are studied. The concept acoustics is discussed, which includes models for sources, room acoustics, spatial hearing. Real-time carried out using a parametric impulse response rendering technique proposed by author. algorithm uses well-known time-domain hybrid model, direct early energy modeled geometrical di use late recursive reverberator. Sound source directivity, dynamic acoustical phenomena such as time-varying re ections from boundary materials air absorption incorporated image-source model low-order lter approximations. A novel estimation directivity based on reciprocity method introduced. Optimization binaural systems discussed. Novel methods head-related transfer function approximation frequency warping balanced truncation Objective subjective estimating quality generation headphone listening For objective analysis, auditory used, predicts well expected performance erent designs. Subjective tests have been to compare design techniques. results show that criteria more eAEcient perceptually relevant processing. This main result thesis. Crosstalk canceled loudspeaker reproduction 3-D reviewed. Stereo widening algorithms An eAEcient, highquality surround lters playback multichannel audio two loudspeakers warped shu er structure presented. has veri ed tests. presented thesis applicable signal processing general, especially implementation acoustic multimedia reality systems.