Libriheavy

Libriheavy: a 50,000 hours ASR corpus with punctuation casing and context. Libriheavy is a labeled version of Librilight.

This uploaded version replaces the default Libri-Light audio files with the highest quality available versions from librivox. In most cases, this consists an upgrade of the source audio from a 64kbps mp3 to a 128kbps mp3.

Audio files are then re-encoded using the Opus 68kbps codec to retain quality and reduce size.

• Homepage: https://github.com/k2-fsa/libriheavy
• License: apache-2.0

Splits

• small: 509 hours of speech. 417 speakers averaging 1.22 hours per speaker.
• medium: 5042 hours of speech. 1531 speakers averaging 3.29 hours per speaker.
• large: 50794 hours of speech. 6736 speakers averaging 7.54 hours per speaker.
• dev: 22.3 hours of speech. 141 speakers averaging 0.16 hours per speaker.
• test_clean: 10.5 hours of speech. 70 speakers averaging 0.15 hours per speaker.
• test_other: 11.5 hours of speech. 72 speakers averaging 0.16 hours per speaker.
• test_clean_large: 107.5 hours of speech. 72 speakers averaging 1.49 hours per speaker.
• test_other_large: 100.3 hours of speech. 73 speakers averaging 1.37 hours per speaker.

Citation

@misc{kang2023libriheavy,
      title={Libriheavy: a 50,000 hours ASR corpus with punctuation casing and context}, 
      author={Wei Kang and Xiaoyu Yang and Zengwei Yao and Fangjun Kuang and Yifan Yang and Liyong Guo and Long Lin and Daniel Povey},
      year={2023},
      eprint={2309.08105},
      archivePrefix={arXiv},
      primaryClass={eess.AS}
}