Dabirsiaghi S. The power efficient encoding of audio signals in digital hearing aids

The thesis is devoted to the decision of important scientific and technical task, which consists of development of methods and algorithms of audio signals transformation, minimizing the energy consumption in digital hearing aids (DHA). The mathematical model of multiphaserepresentation is specified processed in DHA of signals, that facilitates the engineering analysis of parallel processes of data processing. Experimentally, by an imitation design, dependence of watts-in is got in DHA for multiplicatorswith an accumulation with audiodatains for the different formats of numerical representation. The estimation of complete energy consumption is first executed for one-frequency and multifrequencyDHA, for the different formats of presentation of information, that allows argued to choose the model of DHA, technology of data processing, and also element base, coming from the requirement of minimization of energy consumption. Use in DHA of nonlinear quantum with presentation of numbers in a format "sign-exponenta-mantissa", in combination with DHA, counted on data processing, exposed to nonlinear transformation, allows substantially, to three times, to reduce an energy consumption at fixed dynamic range and signal-to-noise ratio.