metadata

configs:
  - config_name: default
    data_files:
      - split: train
        path: data/train-*
      - split: test
        path: data/test-*
dataset_info:
  features:
    - name: audio
      dtype:
        audio:
          sampling_rate: 16000
    - name: text
      dtype: string
    - name: speaker_id
      dtype: int64
    - name: age
      dtype: int64
    - name: sex
      dtype: string
    - name: dialect
      dtype: string
    - name: recording_datetime
      dtype: string
  splits:
    - name: train
      num_bytes: 55199435558
      num_examples: 182605
    - name: test
      num_bytes: 8894080220
      num_examples: 54747
  download_size: 5358057252
  dataset_size: 64093515778
size_categories:
  - 100K<n<1M
license: cc0-1.0
task_categories:
  - automatic-speech-recognition
  - text-to-speech
language:
  - da
pretty_name: NST-da

Dataset Card for NST-da

Dataset Description

Repository: https://www.nb.no/sprakbanken/en/resource-catalogue/oai-nb-no-sbr-55/
Point of Contact: Dan Saattrup Nielsen
Size of downloaded dataset files: 5.36 GB
Size of the generated dataset: 64.09 GB
Total amount of disk used: 69.45 GB

Dataset Summary

This dataset is an upload of the NST Danish ASR Database (16 kHz) – reorganized.

The training and test splits are the original ones.

Supported Tasks and Leaderboards

Training automatic speech recognition is the intended task for this dataset. No leaderboard is active at this point.

Languages

The dataset is available in Danish (da).

Dataset Structure

Data Instances

Size of downloaded dataset files: 5.36 GB
Size of the generated dataset: 64.09 GB
Total amount of disk used: 69.45 GB

An example from the dataset looks as follows.

{
  'audio': {
    'path': 'dk14x404-05072000-1531_u0008121.wav',
    'array': array([ 0.00265503,  0.00248718,  0.00253296, ..., -0.00030518,
                    -0.00035095, -0.00064087]),
    'sampling_rate': 16000
  },
  'text': 'Desuden er der en svømmeprøve, en fremmedsprogstest samt en afsluttende samtale.',
  'speaker_id': 404,
  'age': 24,
  'sex': 'Female',
  'dialect': 'Storkøbenhavn',
  'recording_datetime': '2000-07-05T15:31:14'
}

Data Fields

The data fields are the same among all splits.

audio: an Audio feature.
text: a string feature.
speaker_id: an int64 feature.
age: an int64 feature.
sex: a string feature.
dialect: a string feature.
recording_datetime: a string feature.

Dataset Statistics

There are 183,205 samples in the training split, and 54,747 samples in the test split.

Speakers

There are 539 unique speakers in the training dataset and 56 unique speakers in the test dataset, where 54 of them are also present in the training set.

Age Distribution

Dialect Distribution

Sex Distribution

Transcription Length Distribution

Dataset Creation

Curation Rationale

There are not many large-scale ASR datasets in Danish.

Source Data

The data originates from the now bankrupt company Nordisk språkteknologi (NST), whose data was transferred to the National Library of Norway, who subsequently released it into the public domain.

Additional Information

Dataset Curators

Dan Saattrup Nielsen from the The Alexandra Institute reorganised the dataset and uploaded it to the Hugging Face Hub.

Licensing Information

The dataset is licensed under the CC0 license.