Digital filters for code format conversion
D.J. Goodman · Electronics Letters · 1975
A set of digital filters, each admitting at least a 2 : 1 change in signal sampling rate, is presented. At high rates, the filters require no multiplication or storage, and a sequence of them is simpler than one filter performing code conversion in a single step. Combined with a 1-word buffer, the filters can convert a code to any desired sampling rate.