fix add_eos_sos and cmvn

.gitignore

@@ -9,3 +9,4 @@ tools/venv
 *.tar
 *.tar.gz
 .ipynb_checkpoints
+*.npz

deepspeech/frontend/normalizer.py

@@ -101,7 +101,7 @@ class FeatureNormalizer(object):
             features.append(
                 featurize_func(AudioSegment.from_file(instance["feat"])))
         features = np.hstack(features)  #(D, T)
-        self._mean = np.mean(features, axis=1).reshape([1, -1])  #(1, D)
-        std = np.std(features, axis=1).reshape([1, -1])  #(1, D)
+        self._mean = np.mean(features, axis=1)  #(D,)
+        std = np.std(features, axis=1)  #(D,)
         std = np.clip(std, eps, None)
         self._istd = 1.0 / std

deepspeech/utils/tensor_utils.py

@@ -132,7 +132,7 @@ def add_sos_eos(ys_pad: paddle.Tensor, sos: int, eos: int,
 
     ys_out = paddle.cat([ys_pad, _eos], dim=1)
     ys_out = ys_out.masked_fill(mask_pad, eos)
-    mask_eos = (ys_in == ignore_id)
+    mask_eos = (ys_out == ignore_id)
     ys_out = ys_out.masked_fill(mask_eos, eos)
     ys_out = ys_out.masked_fill(mask_pad, ignore_id)
     return ys_in, ys_out