| --- |
| language: |
| - km |
| license: other |
| task_categories: |
| - automatic-speech-recognition |
| pretty_name: Khmer ASR v4 (actableai) |
| size_categories: |
| - 100K<n<1M |
| tags: |
| - khmer |
| - asr |
| - speech |
| - audio |
| dataset_info: |
| features: |
| - name: audio |
| dtype: |
| audio: |
| sampling_rate: 16000 |
| - name: text |
| dtype: string |
| - name: duration |
| dtype: float32 |
| - name: source |
| dtype: string |
| splits: |
| - name: train |
| num_bytes: 56199107865 |
| num_examples: 486046 |
| - name: validation |
| num_bytes: 1181228871 |
| num_examples: 9910 |
| download_size: 59169192403 |
| dataset_size: 57380336736 |
| configs: |
| - config_name: default |
| data_files: |
| - split: train |
| path: data/train-* |
| - split: validation |
| path: data/validation-* |
| --- |
| |
| # Khmer ASR Dataset (v4) |
|
|
| A consolidated Khmer (ខ្មែរ) speech corpus used to train the actableai Khmer ASR |
| model (NeMo, v4 checkpoint). Combines 17 sub-corpora spanning call-center |
| recordings, broadcast/cultural content, public ASR corpora, and TTS-synthesised |
| speech. |
|
|
| ## Summary |
|
|
| | Split | Utterances | Hours | |
| |------------|-----------:|--------:| |
| | train | 486,046 | 502.77 | |
| | validation | 9,910 | 10.20 | |
| | **total** | **495,956** | **512.97** | |
|
|
| - Sampling rate: 16 kHz, mono, PCM_16. |
| - Text: Khmer script (light normalization from the training pipeline only). |
| |
| ## Schema |
| |
| | Field | Type | Description | |
| |-----------|-------------------|--------------------------------------------| |
| | audio | `Audio(16000 Hz)` | Mono waveform embedded in parquet. | |
| | text | `string` | Khmer transcript. | |
| | duration | `float32` | Seconds. | |
| | source | `string` | Sub-corpus tag (see below). | |
| |
| ## Composition by source |
| |
| | Source | Train | Validation | |
| |----------------------|----------:|-----------:| |
| | metfone_v1_v3 | 173,836 | 3,547 | |
| | synth_full | 107,488 | 2,193 | |
| | ddd_cultural | 55,570 | 1,134 | |
| | sethisak_en_kh | 26,698 | 544 | |
| | sethisak_kh_en_v2 | 26,698 | 544 | |
| | rinabuoy_train | 24,833 | 506 | |
| | sethisak | 21,798 | 444 | |
| | djsamseng_large | 17,628 | 359 | |
| | km_corpus | 14,645 | 298 | |
| | sethisak_asr | 5,545 | 113 | |
| | openslr42 | 2,848 | 58 | |
| | kheng | 2,771 | 56 | |
| | mpwt | 2,017 | 41 | |
| | shunya | 1,630 | 33 | |
| | moses | 949 | 19 | |
| | rinabuoy_test | 750 | 15 | |
| | grkpp | 342 | 6 | |
| |
| `synth_full` is TTS-synthesised speech produced by the actableai OmniVoice |
| pipeline — added in v4 to widen phonetic and prosodic coverage. |
|
|
| ## Usage |
|
|
| ```python |
| from datasets import load_dataset |
| |
| ds = load_dataset("actableai/data-khmer", split="train", streaming=True) |
| example = next(iter(ds)) |
| print(example["text"], example["duration"], example["source"]) |
| print(example["audio"]["sampling_rate"], example["audio"]["array"].shape) |
| ``` |
|
|
| For ASR evaluation, note that Khmer is a syllabic script without reliable |
| word boundaries — prefer **CER** over WER. |
|
|
| ## Provenance & licensing |
|
|
| This is a research aggregation of multiple upstream sources. The licensing of |
| each sub-corpus follows its upstream project; downstream users are responsible |
| for verifying compliance with each source's terms before commercial use. |
| Synthesised audio (`synth_full`) is released under the same terms as the |
| upstream TTS voices it was produced from. |
|
|
