adding dropout-by row

egs/ami/s5b/local/chain/tuning/run_tdnn_lstm_1i_dp.sh

@@ -29,6 +29,7 @@ ihm_gmm=tri3  # the gmm for the IHM system (if --use-ihm-ali true).
 num_threads_ubm=32
 nnet3_affix=_cleaned  # cleanup affix for nnet3 and chain dirs, e.g. _cleaned
 dropout_schedule='0,0@0.20,0.5@0.50,0@0.50,0'
+dropout_per_frame=false
 chunk_width=150
 chunk_left_context=40
 chunk_right_context=0
@@ -193,15 +194,15 @@ if [ $stage -le 15 ]; then
   relu-renorm-layer name=tdnn3 input=Append(-1,0,1) dim=1024
 
   # check steps/libs/nnet3/xconfig/lstm.py for the other options and defaults
-  lstmp-layer name=lstm1 cell-dim=1024 recurrent-projection-dim=256 non-recurrent-projection-dim=256 delay=-3 dropout-proportion=0.0
+  lstmp-layer name=lstm1 cell-dim=1024 recurrent-projection-dim=256 non-recurrent-projection-dim=256 delay=-3 dropout-proportion=0.0 dropout-per-frame=false
   relu-renorm-layer name=tdnn4 input=Append(-3,0,3) dim=1024
   relu-renorm-layer name=tdnn5 input=Append(-3,0,3) dim=1024
   relu-renorm-layer name=tdnn6 input=Append(-3,0,3) dim=1024
-  lstmp-layer name=lstm2 cell-dim=1024 recurrent-projection-dim=256 non-recurrent-projection-dim=256 delay=-3 dropout-proportion=0.0
+  lstmp-layer name=lstm2 cell-dim=1024 recurrent-projection-dim=256 non-recurrent-projection-dim=256 delay=-3 dropout-proportion=0.0 dropout-per-frame=false
   relu-renorm-layer name=tdnn7 input=Append(-3,0,3) dim=1024
   relu-renorm-layer name=tdnn8 input=Append(-3,0,3) dim=1024
   relu-renorm-layer name=tdnn9 input=Append(-3,0,3) dim=1024
-  lstmp-layer name=lstm3 cell-dim=1024 recurrent-projection-dim=256 non-recurrent-projection-dim=256 delay=-3 dropout-proportion=0.0
+  lstmp-layer name=lstm3 cell-dim=1024 recurrent-projection-dim=256 non-recurrent-projection-dim=256 delay=-3 dropout-proportion=0.0 dropout-per-frame=false
 
   ## adding the layers for chain branch
   output-layer name=output input=lstm3 output-delay=$label_delay include-log-softmax=false dim=$num_targets max-change=1.5
@@ -243,6 +244,7 @@ if [ $stage -le 16 ]; then
     --egs.chunk-left-context $chunk_left_context \
     --egs.chunk-right-context $chunk_right_context \
     --trainer.dropout-schedule $dropout_schedule \
+    --trainer.dropout-per-frame $dropout_per_frame \
     --trainer.num-chunk-per-minibatch 64 \
     --trainer.frames-per-iter 1500000 \
     --trainer.num-epochs 4 \

egs/wsj/s5/steps/libs/nnet3/train/chain_objf/acoustic_model.py

@@ -225,6 +225,7 @@ def train_one_iteration(dir, iter, srand, egs_dir,
                         frame_subsampling_factor, truncate_deriv_weights,
                         run_opts,
                         dropout_proportions=None,
+                        dropout_per_frame=None,
                         background_process_handler=None):
     """ Called from steps/nnet3/chain/train.py for one iteration for
     neural network training with LF-MMI objective
@@ -307,7 +308,7 @@ def train_one_iteration(dir, iter, srand, egs_dir,
     dropout_info_str = ''
     if dropout_proportions is not None:
         raw_model_string, dropout_info = common_train_lib.apply_dropout(
-            dropout_proportions, raw_model_string)
+            dropout_proportions, dropout_per_frame, raw_model_string)
         dropout_info_str = ', {0}'.format(", ".join(dropout_info))
 
     shrink_info_str = ''

egs/wsj/s5/steps/libs/nnet3/train/common.py

@@ -511,7 +511,7 @@ def _get_component_dropout(dropout_schedule, num_archives_processed):
             + initial_dropout)
 
 
-def apply_dropout(dropout_proportions, raw_model_string):
+def apply_dropout(dropout_proportions, dropout_per_frame, raw_model_string):
     """Adds an nnet3-copy --edits line to modify raw_model_string to
     set dropout proportions according to dropout_proportions.
 
@@ -523,10 +523,10 @@ def apply_dropout(dropout_proportions, raw_model_string):
 
     for component_name, dropout_proportion in dropout_proportions:
         edit_config_lines.append(
-            "set-dropout-proportion name={0} proportion={1}".format(
-                component_name, dropout_proportion))
-        dropout_info.append("pattern/dropout-proportion={0}/{1}".format(
-            component_name, dropout_proportion))
+            "set-dropout-proportion name={0} proportion={1} dropout-per-frame={2}".format(
+                component_name, dropout_proportion, dropout_per_frame))
+        dropout_info.append("pattern/dropout-proportion={0}/{1} dropout-per-frame={2}".format(
+            component_name, dropout_proportion, dropout_per_frame))
 
     return ("""{raw_model_string} nnet3-copy --edits='{edits}' \
             - - |""".format(raw_model_string=raw_model_string,
@@ -771,6 +771,11 @@ def __init__(self):
                                  lstm*=0,0.2,0'.  More general should precede
                                  less general patterns, as they are applied
                                  sequentially.""")
+        self.parser.add_argument("--trainer.dropout-per-frame", type=str,
+                                 action=common_lib.NullstrToNoneAction,
+                                 dest='dropout_per_frame', default=None,
+                                 help="""this option is used to control whether
+                                 using dropout by frame level or by vector level""")
 
         # General options
         self.parser.add_argument("--stage", type=int, default=-4,

egs/wsj/s5/steps/libs/nnet3/xconfig/lstm.py

@@ -251,6 +251,7 @@ def set_default_configs(self):
                         'zeroing-interval' : 20,
                         'zeroing-threshold' : 15.0,
                         'dropout-proportion' : -1.0 # -1.0 stands for no dropout will be added
+                        'dropout-per-frame' : 'false'
                        }
 
     def set_derived_configs(self):
@@ -285,6 +286,10 @@ def check_configs(self):
              self.config['dropout-proportion'] < 0.0) and
              self.config['dropout-proportion'] != -1.0 ):
              raise xparser_error("dropout-proportion has invalid value {0}.".format(self.config['dropout-proportion']))
+
+        if (self.config['dropout-per-frame'] != 'false' or
+            self.config['dropout-per-frame'] != 'true'):
+            raise xparser_error("dropout-per-frame has invalid value {0}.".format(self.config['dropout-per-frame']))
 
     def auxiliary_outputs(self):
         return ['c_t']
@@ -347,7 +352,8 @@ def generate_lstm_config(self):
         pes_str = self.config['ng-per-element-scale-options']
         lstm_dropout_value = self.config['dropout-proportion']
         lstm_dropout_str = 'dropout-proportion='+str(self.config['dropout-proportion'])
-
+        lstm_dropout_per_frame_value = self.config['dropout-per-frame']
+        lstm_dropout_per_frame_str = 'dropout-per-frame='+str(self.config['dropout-per-frame'])
         # Natural gradient per element scale parameters
         # TODO: decide if we want to keep exposing these options
         if re.search('param-mean', pes_str) is None and \

egs/wsj/s5/steps/nnet3/chain/train.py

@@ -202,7 +202,10 @@ def process_args(args):
             "value={0}. We recommend using the option "
             "--trainer.deriv-truncate-margin.".format(
                 args.deriv_truncate_margin))
-
+    if ( args.dropout_schedule is None ) 
+            and (args.dropout_per_frame is not None) :
+        raise Exception("The dropout schedule is null, but dropout_per_frame"
+                        "option is not null")
     if (not os.path.exists(args.dir)
             or not os.path.exists(args.dir+"/configs")):
         raise Exception("This scripts expects {0} to exist and have a configs "
@@ -441,6 +444,9 @@ def learning_rate(iter, current_num_jobs, num_archives_processed):
                     None if args.dropout_schedule is None
                     else common_train_lib.get_dropout_proportions(
                         dropout_schedule, num_archives_processed)),
+                dropout_per_frame=(
+                    None if args.dropout_schedule is None
+                    else args.dropout_per_frame),
                 shrinkage_value=shrinkage_value,
                 num_chunk_per_minibatch=args.num_chunk_per_minibatch,
                 num_hidden_layers=num_hidden_layers,

src/nnet3/nnet-simple-component.cc

@@ -108,9 +108,7 @@ void DropoutComponent::InitFromConfig(ConfigLine *cfl) {
   {
       dropout_per_frame = false;
       Init(dim, dropout_proportion, dropout_per_frame);
-  }
-  else
-  {
+  } else {
       Init(dim, dropout_proportion, dropout_per_frame);
   }
 }
@@ -131,7 +129,7 @@ void DropoutComponent::Propagate(const ComponentPrecomputedIndexes *indexes,
 
   BaseFloat dropout = dropout_proportion_;
   KALDI_ASSERT(dropout >= 0.0 && dropout <= 1.0);
-  if(dropout_per_frame_ == true)
+  if(dropout_per_frame_)
   {
     // This const_cast is only safe assuming you don't attempt
     // to use multi-threaded code with the GPU.
@@ -142,9 +140,7 @@ void DropoutComponent::Propagate(const ComponentPrecomputedIndexes *indexes,
                           // be zero and (1 - dropout) will be 1.0.
 
     out->MulElements(in);
-  }
-  else
-  {
+  } else {
 
     // This const_cast is only safe assuming you don't attempt
     // to use multi-threaded code with the GPU.

src/nnet3/nnet-utils.cc

@@ -524,7 +524,7 @@ std::string NnetInfo(const Nnet &nnet) {
 }
 
 void SetDropoutProportion(BaseFloat dropout_proportion,
-                          bool dropout_per_frame ,
+                          bool dropout_per_frame,
                           Nnet *nnet) {
   dropout_per_frame = false;
   for (int32 c = 0; c < nnet->NumComponents(); c++) {
@@ -696,13 +696,13 @@ void ReadEditConfig(std::istream &edit_config_is, Nnet *nnet) {
       // matches names of components, not nodes.
       config_line.GetValue("name", &name_pattern);
       BaseFloat proportion = -1;
-      bool perframe = false;
+      bool dropout_per_frame = false;
       if (!config_line.GetValue("proportion", &proportion)) {
         KALDI_ERR << "In edits-config, expected proportion to be set in line: "
                   << config_line.WholeLine();
       }
-      if (!config_line.GetValue("perframe", &perframe)) {
-        perframe = false;
+      if (!config_line.GetValue("dropout-per-frame", &dropout_per_frame)) {
+        dropout_per_frame = false;
       }
       DropoutComponent *component = NULL;
       int32 num_dropout_proportions_set = 0;
@@ -711,7 +711,7 @@ void ReadEditConfig(std::istream &edit_config_is, Nnet *nnet) {
                                name_pattern.c_str()) &&
             (component =
              dynamic_cast<DropoutComponent*>(nnet->GetComponent(c)))) {
-          component->SetDropoutProportion(proportion, perframe);
+          component->SetDropoutProportion(proportion, dropout_per_frame);
           num_dropout_proportions_set++;
         }
       }

src/nnet3/nnet-utils.h

@@ -233,7 +233,7 @@ void FindOrphanNodes(const Nnet &nnet, std::vector<int32> *nodes);
        remove internal nodes directly; instead you should use the command
        'remove-orphans'.
 
-    set-dropout-proportion [name=<name-pattern>] proportion=<dropout-proportion> perframe=<perframe>
+    set-dropout-proportion [name=<name-pattern>] proportion=<dropout-proportion> dropout-per-frame=<dropout-per-frame>
        Sets the dropout rates for any components of type DropoutComponent whose
        names match the given <name-pattern> (e.g. lstm*).  <name-pattern> defaults to "*".
    \endverbatim