An error exponent for lossy source coding with side information at the decoder

Consider discrete memoryless sources X and Y with joint pdf P/sub XY/ and let d: /spl chi//spl times//spl chi//spl rarr/(O, /spl infin/) be a single-letter distortion measure. Suppose the source X must be compressed at rate R with distortion no larger than D, when the side information Y is available only to the decoder. This is the Wyner-Ziv model for lossy source coding with side information at the decoder; one method of constructing good source codes is described here.