Title: The rate-distortion function for source coding with side information at the decoder\3-II: General sources
Abstract: In this paper we generalize (to nondiscrete sources) the results of a previous paper (Wyner and Ziv, 1976) on source coding with a fidelity criterion in a situation where the decoder (but not the encoder) has access to side information about the source. We define R*(d) as the minimum rate (in the usual Shannon sense) required for encoding the source at a distortion level about d. The main result is the characterization of R*(d) by an information theoretic minimization. In a special case in which the source and the side information are jointly Gaussian, it is shown that R*(d) is equal to the rate which would be required if the encoder (as well as the decoder) is informed of the side information.