| --- |
| configs: |
| - config_name: default |
| data_files: |
| - split: train |
| path: data/train-* |
| - split: test |
| path: data/test-* |
| library_name: datasets |
| tags: |
| - audio |
| - croissant |
| dataset_info: |
| features: |
| - name: audio |
| dtype: |
| audio: |
| sampling_rate: 16000 |
| - name: text |
| dtype: string |
| - name: speaker_id |
| dtype: string |
| - name: gender |
| dtype: string |
| - name: age_group |
| dtype: string |
| - name: duration_ms |
| dtype: int32 |
| - name: is_noise |
| dtype: bool |
| - name: tags |
| list: string |
| - name: entry_id |
| dtype: string |
| - name: segment_id |
| dtype: string |
| - name: start_ms |
| dtype: int32 |
| - name: end_ms |
| dtype: int32 |
| - name: annotator |
| dtype: string |
| splits: |
| - name: train |
| num_bytes: 101593759705 |
| num_examples: 1659246 |
| - name: test |
| num_bytes: 13984403336 |
| num_examples: 215297 |
| download_size: 114499980027 |
| dataset_size: 115578163041 |
| license: cc-by-4.0 |
| task_categories: |
| - text-to-speech |
| - automatic-speech-recognition |
| language: |
| - lt |
| pretty_name: LIEPA-2 |
| --- |
| # Dataset Card for LIEPA-2 |
|
|
| ## Dataset Summary |
|
|
| The **LIEPA-2** dataset is a large-scale annotated speech corpus for the Lithuanian language, developed under the project "Development of Services Controlled by Lithuanian Speech" (LIEPA-2). It is a phonetically representative, structured collection of data (audio recordings and annotations) designed for scientific research in speech technologies and the development of electronic services. |
|
|
| * **Total Duration:** 1000 hours |
| * **Access:** Due to the large size of the dataset, it is not available for direct download. Interested parties are requested to contact the creators at **gediminas.navickas@mif.vu.lt**. |
|
|
| The dataset was created by **Vilnius University** (Institute of Data Science and Digital Technologies, Faculty of Philology) and partners. |
|
|
| ## Dataset Statistics |
|
|
| * **Total Duration:** 1000 hours |
| * **Total Speakers:** 2,621 |
| * **Speech Types:** |
| * Read speech: 91% |
| * Spontaneous speech: 9% |
|
|
| ### Recording Environments |
| * **Studio recordings:** 62% |
| * **Dictaphone recordings:** 28% |
| * **Audio books:** 3% |
| * **TV broadcasts:** 3% |
| * **Radio broadcasts:** 2% |
| * **Telephone recordings:** 2% |
|
|
| ### Speaker Demographics |
| * **Gender Distribution:** |
| * Female: 56% |
| * Male: 44% |
| * **Age Distribution:** |
| * Under 12 years: 8% |
| * 13–17 years: 3% |
| * 18–25 years: 18% |
| * 26–60 years: 61% |
| * Over 60 years: 10% |
|
|
| ## Dataset Structure |
|
|
| ### Data Format |
| This dataset is **SLICED** for ASR training. Each row represents a single audio segment (utterance or noise event). |
|
|
| * **Audio**: The sliced audio segment (WAV, 16kHz). |
| * **Text**: The transcription of the segment. |
| * For **Noise Segments** (`is_noise=True`), the text contains the noise label (e.g., `+BREATH+`, `+SMACK+`, `+GARBAGE+`). |
| * **Metadata Fields**: |
| * `is_noise`: **Boolean**. `True` if the segment represents a noise event, `False` for speech. **Note**: The dataset explicitely includes noise segments as separate rows for training stability/negative sampling. |
| * `speaker_id`: Unique speaker identifier. |
| * `gender`: `Female` / `Male`. |
| * `age_group`: e.g., `26-60`, `0-12`. |
| * `duration_ms`: Length of segment in milliseconds. |
| * `tags`: List of entry-level tags (e.g., `['abc']` for alphabet reading). |
| * `annotator`: 2-letter code of the annotator (derived from Speaker ID). |
| * `entry_id`: ID of the original recording (EAF file). |
| * `segment_id`: ID of the segment within the recording. |
| * `start_ms` / `end_ms`: Timestamp in the original file. |
|
|
| ### Original Documentation |
| For the full labeling protocol and noise class definitions, please refer to the **[readme.pdf](./docs/LIEPA-2-readme.pdf)** included in the repository root. |
|
|
| ## Additional Information |
|
|
| ### Licensing Information |
| The LIEPA-2 dataset is distributed under the **CC BY (Creative Commons Attribution)** license. |
|
|
| ### Citation Information |
| When using this dataset for the development of other products, please mention in your product description that the dataset was created at **Vilnius University** under the project **"Lietuvių šneka valdomų paslaugų plėtra – LIEPA 2"**. |
|
|
| ### Contact |
| For access to the original dataset, please contact: **gediminas.navickas@mif.vu.lt** |
|
|
| * **Project Website:** [liepa2.rastija.lt](http://liepa2.rastija.lt) |
| * **Creators:** Vilnius University (Institute of Mathematics and Informatics, Faculty of Philology). |
|
|
| ### References |
| - [Garsynas LIEPA-2](https://xn--ratija-ckb.lt/liepa-2/infrastrukturines-paslaugos/garsynas/) |
