remove ctc grad norm option

ecbe785e · Hui Zhang · 5d626aa6 · ecbe785e
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examples/librispeech/asr2/conf/transformer.yaml examples/librispeech/asr2/conf/transformer.yaml +1 -1

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--- a/examples/librispeech/asr2/conf/transformer.yaml
+++ b/examples/librispeech/asr2/conf/transformer.yaml
@@ -31,7 +31,7 @@ model:
    model_conf:
        ctc_weight: 0.3
        ctc_dropoutrate: 0.0
-        ctc_grad_norm_type: batch
+        ctc_grad_norm_type: null 
        lsm_weight: 0.1     # label smoothing option
        length_normalized_loss: false