The Application of Dither and Noise - Shaping toNyquist - Rate

This paper discusses the theory of dithered and noise-shaped quantisation, and in particular their application to Nyquist rate digital audio. Dither is shown to be essential if quantisation-related distortion is to be avoided. Careful application of noise-shaping is shown to be of audible beneet by increasing the perceived dynamic range of a signal. Various drawbacks of the technique are discussed. In particular thèfragility' of signals processed in this way is noted, and the ease with which the beneets may be undone is illustrated. to copy and store it in magnetic or electronic form and to make a single hard copy, for private study, educational use or other non-commercial purpose, subject to the following conditions: the document shall remain complete and unaltered, and no charge shall be made for access to it. The author reserves all other rights.