Manage Kaldi-style data directory as ORM for easier data management (train-dev split, etc).

• Convert Kaldi-style data directory to database

python3 data2db.py --data_dir "data/cmu_kids" --db_file "data/cmu.db" 

• Convert database to Kaldi-style directory

python3 db2data.py --db_file "data/cmu_train.db" --data_dir "data/cmu_kids_train"

• Split database by transcribed sentence (reserved certain amount of sentence). Also supports splitting by "spk"(reserves certain amount of speakers), and splitting by "utt" (reserves certain amount of utterances).

python3 split_db.py --db_file "data/cmu.db" \
  --split_by "sent" --data_dir "data/cmu_sent" \
  --split_ratio "{'train':0.7, 'dev': 0.15, 'test': 0.15}"