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GigaSpeech

10,000 hours of transcribed English speech from podcasts, audiobooks, and YouTube.

LQS 85 · gold ✓ Commercial OK 8.3M speech segments 760 GB OPUS · JSON Released 2021
Browse commercial Audio → Visit original source ↗
Source: github.com · maintained by SpeechColab
8.3M
speech segments
760 GB
Size on disk
85
LQS · gold
2021
First released

About this dataset

GigaSpeech from SpeechColab is a multi-domain English ASR corpus with 10,000 hours of transcribed audio sourced from audiobooks, podcasts, and YouTube. The XL subset is full 10K hrs; smaller subsets (L, M, S, XS) are provided for faster experimentation. Transcripts normalized and punctuated.

Maintainer
SpeechColab
License
Apache 2.0
Formats
OPUS · JSON
Paper
Read on arxiv.org →

LabelSets Quality Score

LQS is our 7-dimension quality score, computed from the dataset's published statistics. See methodology →

85
out of 100
gold tier

High-quality dataset across most dimensions

Composite score computed from the 7 dimensions below: completeness, uniqueness, validation health, size adequacy, format compliance, label density, and class balance.

Completeness 88
No public completeness metric; using prior for 'crowdsourced_qc' datasets.
Uniqueness 93
Exact-hash deduplication documented by maintainer.
Validation 82
Crowdsourced labels with quality-control protocol (redundancy, golden tests).
Size adequacy 96
8,300,000 segments — exceeds 100,000 adequacy target for Audio.
Format compliance 95
Industry-standard format — drop-in compatible with mainstream tooling.
Label density 52
Average 1.0 labels per item (sparse).
Class balance 75
Moderate class skew — realistic production distribution.

What it's used for

Common tasks and benchmarks where GigaSpeech is the default or competitive choice.

Sample statistics

What's actually in the dataset — from the maintainer's published stats.

10,000 hours / 8.3M segments from audiobooks (33%), podcasts (17%), YouTube (50%). XL / L / M / S / XS subsets. 16kHz.

License

GigaSpeech is distributed under Apache 2.0. This is a third-party public dataset; LabelSets indexes and scores it but does not host or redistribute the data. Always verify current license terms with the maintainer before commercial use.

Need commercial-licensed Audio data?

LabelSets sellers offer paid audio datasets with what public datasets often can't give you:

Browse paid Audio → Sell your dataset

Similar public datasets

Other entries in the Audio catalog.

LibriSpeech
292K speech utterances · CC BY 4.0
Mozilla Common Voice
14M validated clips · CC0 1.0
AudioSet
2.1M audio clips · CC BY 4.0 (labels)
VoxCeleb
1.3M speech utterances · CC BY-SA 4.0 (VoxCeleb1) / Research (VoxCeleb2)

Frequently Asked Questions

GigaSpeech is distributed under Apache 2.0, which generally permits commercial use. Always verify the current license terms with the maintainer (SpeechColab) before using in a commercial product.
GigaSpeech contains 8,300,000 speech segments. 10,000 hours / 8.3M segments from audiobooks (33%), podcasts (17%), YouTube (50%). XL / L / M / S / XS subsets. 16kHz.
GigaSpeech is maintained by SpeechColab and is available at https://github.com/SpeechColab/GigaSpeech. LabelSets indexes and scores this dataset for discoverability but does not redistribute it.
LQS is a 7-dimension quality score (completeness, uniqueness, validation, size adequacy, format compliance, label density, class balance) computed from the dataset's published statistics. Composite scores map to tiers: platinum (≥90), gold (≥75), silver (≥60), bronze (<60). Read the full methodology.