An information-spectrum approach to rate-distortion function with side information

We describe an information-spectrum approach to rate-distortion function with side information at the decoder for the general class of nonstationary and/or nonergodic sources, where the distortion measure is arbitrary and may be nonadditive. We establish a general formula for the rate-distortion function of the Wyner-Ziv problem (1976) for the general sources with the maximum distortion criterion under fixed-rate coding.