Title
Normalization Propagation: A Parametric Technique for Removing Internal Covariate Shift in Deep Networks.
Abstract
While the authors of Batch Normalization (BN) identify and address an important problem involved in training deep networks- Internal Covariate Shift- the current solution has certain drawbacks. For instance, BN depends on batch statistics for layerwise input normalization during training which makes the estimates of mean and standard deviation of input (distribution) to hidden layers inaccurate due to shifting parameter values (especially during initial training epochs). Another fundamental problem with BN is that it cannot be used with batch-size 1 during training. We address these drawbacks of BN by proposing a non-adaptive normalization technique for removing covariate shift, that we call Normalization Propagation. Our approach does not depend on batch statistics, but rather uses a data-independent parametric estimate of mean and standard-deviation in every layer thus being computationally faster compared with BN. We exploit the observation that the pre-activation before Rectified Linear Units follow Gaussian distribution in deep networks, and that once the first and second order statistics of any given dataset are normalized, we can forward propagate this normalization without the need for recalculating the approximate statistics for hidden layers.
Year
Venue
DocType
2016
ICML
Conference
Volume
Citations 
PageRank 
abs/1603.01431
22
1.36
References 
Authors
8
4
Name
Order
Citations
PageRank
Devansh Arpit114614.24
Yingbo Zhou226319.43
Bhargava Urala Kota3241.73
Venu Govindaraju43521422.00