From c589c3aabaae7f3867bdfed994c8179a87f42675 Mon Sep 17 00:00:00 2001
From: Qi Liu <liuq901@163.com>
Date: Tue, 29 Mar 2016 10:05:29 +0800
Subject: fix bug of momentum & update mse layer

---
 nerv/layer/mse.lua | 33 +++++++++++++++++++++++----------
 1 file changed, 23 insertions(+), 10 deletions(-)

(limited to 'nerv/layer/mse.lua')

diff --git a/nerv/layer/mse.lua b/nerv/layer/mse.lua
index 458d086..c1ea596 100644
--- a/nerv/layer/mse.lua
+++ b/nerv/layer/mse.lua
@@ -9,23 +9,28 @@ function MSELayer:bind_params()
     -- do nothing
 end
 
-function MSELayer:init(batch_size)
+function MSELayer:init(batch_size, chunk_size)
     if self.dim_in[1] ~= self.dim_in[2] then
         nerv.error("mismatching dimensions of previous network output and labels")
     end
-    self.scale = 1 / self.dim_in[1]
+    self.scale = 1.0 / self.dim_in[1]
     self.total_mse = 0.0
     self.total_frames = 0
     self.mse = self.mat_type(batch_size, self.dim_in[1])
     self.mse_sum = self.mat_type(batch_size, 1)
-    self.diff = self.mse:create()
+    self.diff = {}
+    for t = 1, chunk_size do
+        self.diff[t] = self.mse:create()
+    end
 end
 
 function MSELayer:batch_resize(batch_size)
     if self.mse:nrow() ~= batch_resize then
         self.mse = self.mat_type(batch_size, self.dim_in[1])
         self.mse_sum = self.mat_type(batch_size, 1)
-        self.diff = self.mse:create()
+        for t = 1, chunk_size do
+            self.diff[t] = self.mse:create()
+        end
     end
 end
 
@@ -33,24 +38,32 @@ function MSELayer:update(bp_err, input, output)
     -- no params, therefore do nothing
 end
 
-function MSELayer:propagate(input, output)
+function MSELayer:propagate(input, output, t)
+    if t == nil then
+        t = 1
+    end
     local mse = self.mse
     local mse_sum = self.mse_sum
+    local diff = self.diff[t]
     mse:add(input[1], input[2], 1.0, -1.0)
-    self.diff:copy_from(mse)
+    mse:set_values_by_mask(self.gconf.mask[t], 0)
+    diff:copy_from(mse)
     mse:mul_elem(mse, mse)
-    mse_sum:add(mse_sum, mse:rowsum(mse), 0.0, self.scale)
+    mse_sum:add(mse_sum, mse:rowsum(), 0.0, self.scale * 0.5)
     if output[1] ~= nil then
         output[1]:copy_from(mse_sum)
     end
     self.total_mse = self.total_mse + mse_sum:colsum()[0][0]
-    self.total_frames = self.total_frames + mse_sum:nrow()
+    self.total_frames = self.total_frames + self.gconf.mask[t]:colsum()[0][0]
 end
 
 -- NOTE: must call propagate before back_propagate
-function MSELayer:back_propagate(bp_err, next_bp_err, input, output)
+function MSELayer:back_propagate(bp_err, next_bp_err, input, output, t)
+    if t == nil then
+        t = 1
+    end
     local nbe = next_bp_err[1]
-    nbe:add(nbe, self.diff, 0.0, 2 * self.scale)
+    nbe:add(nbe, self.diff[t], 0.0, self.scale)
     if bp_err[1] ~= nil then
         nbe:scale_rows_by_col(bp_err[1])
     end
-- 
cgit v1.2.3-70-g09d2