Various digital-audio conversion systems in use today are reviewed, and their performance considered in light of the human auditory system. Some of the practical problems of binary-weight-summation, two-slope integrating, floating-point, and error-feedback or noise-shaping converters are discussed. Their performance limitations are compared to the noise and distortion detection capabilities of the ear. Although practical implementations of these conversion techniques have problems under demanding conditions, there are techniques to reduce their audible consequence.
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