Transformation from 512-point transform coefficientsto 256-point transform coefficients for Dolby AC-3 decoder
Szu-Wei Lee, Chi‐Min Liu · Electronics Letters · 1999
Transformation from 512-point transform coefficients to 256-point transform coefficients for Dolby AC-3 decoder The Dolby AC-3 standard defines 512-point and 256-point transforms to provide high audio quality when signals rapidly change in time. This authors provide theoretical derivations and proofs for the transformation from 512-point transform coefficients to 256-point transform coefficients.