class_docstr: Compute and apply CMVN to features.
class_docstr_tok: ["Compute","and","apply","CMVN","to","features","."]
code: def __init__(self, config: dict):
      super().__init__(config)
  
file_path: delta/delta/data/frontend/cmvn.py
imports: import io
  import kaldiio
  import numpy
  from delta.utils.hparam import HParams
  from delta.data.frontend.base_frontend import BaseFrontend
label_desc: Use image node_id 1 to create a new CMVN object from inherited base classes: BaseFrontend with example: obj = CMVN(config)