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README.md

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+---
+license: other
+language:
+- en
+task_categories:
+- automatic-speech-recognition
+pretty_name: IALP-2026 Whisper Data-Selection Evaluation Sets
+tags:
+- speech
+- asr
+- whisper
+- data-selection
+- singaporean-english
+- gigaspeech
+- librispeech
+---
+
+# IALP-2026: Whisper Open-Set Data-Selection — Query / Dev / Test Sets
+
+Supporting data for the study *"Whisper-Based Open-Set Data Selection for NSC
+Adaptation."* This repository holds the **fixed target-query, validation, and
+evaluation sets** used across all experiments. Each part is a self-contained
+`.tar.gz`.
+
+All audio is **16 kHz mono**. Each split ships with:
+
+- `audio/` — audio files (FLAC, except GigaSpeech which is WAV PCM_16)
+- `wav.scp` — `<utt_id> audio/<file>` (Kaldi-style, **relative** paths)
+- `text` — `<utt_id> <transcript>`
+- `utt2spk` — `<utt_id> <speaker_id>`
+- `manifest.jsonl` — one JSON per utterance: `{id, speaker, duration, text, audio}`
+
+## Parts
+
+| Archive | Split | Source | #utts | Hours | Role |
+|---|---|---|---:|---:|---|
+| `nsc-query.tar.gz` | `nsc_query_5h` | NSC IMDA Part 6 (`train`) | ~2000 | ~5.0 | Target-domain query set for data selection / EXP0 |
+| `nsc-dev.tar.gz` | `nsc_dev_3h` | NSC IMDA Part 6 (`train`) | ~1200 | ~3.0 | Validation / checkpoint selection |
+| `nsc-test.tar.gz` | `nsc_test` | NSC IMDA Part 6 (`test`) | 3684 | ~7 | In-domain final evaluation |
+| `gigaspeech-test.tar.gz` | `gigaspeech_test` | GigaSpeech `test` | 19930 | 35.4 | OOD evaluation (normalized refs) |
+| `librispeech-test.tar.gz` | `librispeech_test_clean` + `librispeech_test_other` | LibriSpeech | 2620 + 2939 | 5.4 + 5.3 | OOD evaluation |
+
+## Split construction (NSC)
+
+- **Speaker** is the 4th hyphen field of the utterance id
+  (`imda-2021-part6-`**`00006`**`-channel001m-...`).
+- `nsc_query_5h`, `nsc_dev_3h`, and `nsc_test` are **mutually speaker-disjoint**.
+  Query/dev speakers are sampled (`seed=42`) from shards spread across the
+  corpus and exclude every speaker appearing in the official `test` partition.
+- Query ≈ 111 speakers; dev ≈ 64 speakers.
+
+## Notes
+
+- GigaSpeech `text` is the standard normalized reference (punctuation tags
+  removed, garbage-tagged segments filtered); it is the icefall/Kaldi test set.
+- Licensing follows the upstream corpora: **NSC/IMDA** (IMDA terms),
+  **GigaSpeech** (`speechcolab/gigaspeech` agreement), **LibriSpeech** (CC BY 4.0).
+  Use is restricted to the respective original licenses.
+
+## Usage
+
+```bash
+tar xzf nsc-query.tar.gz   # -> nsc_query_5h/{audio,wav.scp,text,utt2spk,manifest.jsonl}
+```