Datasets:
metadata
license: cc0-1.0
task_categories:
- text-to-speech
- automatic-speech-recognition
language:
- 'no'
- nb
tags:
- librivox
pretty_name: NB-LibriVox
size_categories:
- 1K<n<10K
📄 NB-LibriVox
A high-quality Norwegian text-to-speech (TTS) dataset derived from LibriVox public domain audiobooks. It includes audio clips with pseudo-aligned transcripts and punctuation, curated by the National Library of Norway for speech synthesis and ASR research.
📂 Dataset Overview
| Field | Description |
|---|---|
file_name |
Audio file name in .wav format |
id |
Unique identifier for each utterance/sample |
text |
Transcript automatically generated using NB-Whisper Large and nb-wav2vec2 |
text_punct |
Transcript with punctuation automatically added using Qwen3 |
speaker_id |
Identifier of the speaker |
speaker_name |
Name of the speaker |
speaker_gender |
Gender of the speaker (e.g., male, female, unknown) |
speaker_status |
Speaker's native status (e.g., L1, L2) |
title |
Title of the source audiobook |
author |
Author of the original text |
sequence |
Position of the utterance within the audiobook file |
duration |
Duration of the audio clip in seconds |
Speaker Stats by Sample Count
| speaker_name | speaker_id | speaker_status | sample_count | total_duration (hrs) | avg_duration (secs) |
|---|---|---|---|---|---|
| Kathrine Engan | female_no_librivox_1 | L1 | 4,873 | 9.0871 | 6.713 |
| Kristin G | female_no_librivox_2 | L1 | 18 | 0.0525 | 10.388 |
| Austin Smith | male_no_librivox_male_1 | L2 | 16 | 0.0170 | 3.822 |
📌 Additional Information
- Language: Norwegian (Bokmål)
- Audio Format: MPEG ADTS, layer III, v1, 64 kbps, 48 kHz, Monaural
- Text Alignment:
- Method: Pseudo-labeling and splitting of sentences up to 30 seconds
- ASR Model:
NB-Whisper Large - Supplementary Model:
nb-wav2vec2 - Alignment Type: Pseudo-labeling (not force-aligned)
- Punctuation Model: Qwen3 235B
- Total Duration: 9 hours
- Total Samples: 4907 samples
📜 Licensing & Usage
- License: Creative Commons Zero (CC0)
- Data Source: LibriVox public domain recordings
- Dataset Creator: National Library of Norway
Free to use, modify, and distribute for any purpose, including commercial use.
⚠️ Ethical Considerations
- All content is in the public domain and CC0-licensed.
- Speakers are volunteers; synthesized voices should not be used in misleading or impersonating contexts.
- Encourage transparency when using in generative applications (e.g., voice assistants, synthetic speech).
📎 Citation
“Norwegian LibriVox TTS Dataset (CC0), curated by the National Library of Norway. Transcripts pseudo-labeled using NB-Whisper Large and nb-wav2vec2.”