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We develop new rate distortion bounds for wideband speech sources based on phonetically-motivated composite source models, conditional rate distortion theory, and perceptual wideband PESQ (WPESQ) distortion measures. The approach is to calculate rate distortion bounds for MSE distortion for each subsource of the composite source model and use conditional rate distortion theory to calculate the MSE R(D) for the composite source. Since MSE is not a useful distortion measure for today'sdoi:10.1109/ita.2012.6181803 dblp:conf/ita/GibsonL12 fatcat:2xphkvarpzhtnior4jgjbhvnwa