what exactly is Variance(Xt) during the Forward Process in Diffusion model ?Submitted by eugene129 t3_11lgo2d in deeplearning
eugene129 OP t1_jbkfrsr wrote
Reply to comment by rkstgr in what exactly is Variance(Xt) during the Forward Process in Diffusion model ? by eugene129
Hello, thanks for your reply. So... N(Xt ; ... , BtI) doesn't mean that the V(Xt) = Bt ?
rkstgr t1_jc9sf5c wrote
Exactly, because you have x_t-1 with some (unknown, data/normalisation dependent) variance and you add noise with variance \beta to get x_t.
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