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Neural Discrete Representation Learning 논문리뷰 발표자료
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VQ-VAE
1.
Neural Discrete Representation
Learning https://arxiv.org/abs/1711.00937 Aaron van den Oord, Oriol Vinyals, Koray Kavukcuoglu 박수철
2.
Goal Neural NetworkMusic Data
Generated Data
3.
Wavenet WavenetMusic Data Generated
Data
4.
Wavenet의 한계 Long-range structure를
반영하지 못한다. receptive field를 늘려도 sample단위의 미래를 예측할 뿐, 의미를 만들어내는 단어(speech), 프레이즈(music)를 만들어내지 못함. https://deepmind.com/blog/wavenet-generative-model-raw-audio WavenetMusic Data Generated Data
5.
Latent를 만들자 z1 z2
zM Encoder Decoder
6.
Sampling 가능한 Latent를
만들자 (VAE같은걸 끼얹나?) z1 z2 zM Decoder Encoder
7.
VAE의 한계 :
Posterior Collapse Encoder Decoder Gaussian Noise p(x) = T ∏ t=1 p(xt |x<t, zt) Variational posterior gaussian prior
8.
VQ-VAE : 샘플링
가능한 비 노이즈적 벡터로 posterior를 근사 Encoder Decoder p(x) = T ∏ t=1 p(xt |x<t, zt) p(z) = Categorical
9.
VQ-VAE : 샘플링
가능한 비 노이즈적 벡터로 posterior를 근사 Encoder Decoderze(x) zq(x) codebook reconstruction codebook commitment e1 e2 e3 e4 e5 e6 e7
10.
VQ-VAE : 샘플링
가능한 비 노이즈적 벡터로 posterior를 근사
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