Get a term for the variational lower-bound. The resulting units are bits (rather than nats, as one might expect). This allows for comparison to other papers. :return: a dict with the following keys: - 'output': a shape [N] tensor of NLLs or KLs.
(
self, model, x_start, x_t, t, clip_denoised=True, model_kwargs=None
)
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