Fundamental issues in auditory modeling

In principle, speech and audio coding systems can be evaluated by comparing the responses of a model of auditory processing to the original and the coded signals, providiing that the model responses includes all perceptually-relevant features of the signal, while decreasing signal redundancy. In practice, present knowledge of auditory physiology is incomplete, so that it is difficult to decide which aspects of auditory processing the model should attempt to simulate. This; talk will address three fundamental issues in auditory modeling that are important for the design of irnproved coding systems.