On the Encoder-Decoder Incompatibility inVariational Text Modeling and Beyond
Table 8: Dialogue generation. D-1 and D-2 are normalized to [0,100]. *The exact NLL is reported.
['[EMPTY]', 'NLL (KL)', 'PPL', 'D-1', 'D-2']
It indicates that Coupled-CVAE better captures the one-to-many nature of conversations than CVAE and GRU encoder-decoder. We also observe that the diversity is improved with increasing λm, which shows that λm can control diversity via specifying the richness of the latent space.