1. A computer-implemented method of decoding audio information, the method comprising: receiving side information and frequency coefficient data in a transform domain; performing an inverse time-split transform on adjacent frequency coefficients in the frequency coefficient data as indicated in the received side information, wherein the inverse time-split transform comprises an inverse of a selectively-applied sum and difference orthogonal transform performed on the adjacent frequency coefficients that changes time resolution for a portion of the frequency coefficient data; and performing an inverse transform on the received frequency coefficient data comprising transforming the coefficient data from the transform domain to a time domain.