| # Deprecation Notice — Korean & Hindi Two-Language Pack (v1.0) |
|
|
| **Status:** Deprecated. Please use the v1.1 replacement files in this folder. |
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|
| --- |
|
|
| ## What was deprecated and why |
|
|
| The original two-language release (`korean_cv24.parquet` and `hindi_cv24.parquet`, published as |
| *Alexandria Voice Corpus — Korean & Hindi Macro-Prosody Telemetry*) was built on a pipeline |
| with three unresolved quality-gate bugs. Those files should no longer be used. |
|
|
| ### Bugs present in the v1.0 files |
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|
| **BUG-029 — Missing C50 floor on T2 gate** |
| The STUDIO tier (T2) admitted clips regardless of C50 (room clarity) as long as SNR was |
| sufficient. This allowed high-reverb recordings — rooms with significant echo or reflected |
| sound — to be stamped STUDIO. Affected features include spectral tilt, HNR, CPPS, and |
| F0 smoothness, all of which degrade in reverberant conditions. The fix requires |
| C50 ≥ 20 dB in addition to SNR for any clip to reach T2. |
|
|
| **BUG-030 — Missing speech-ratio floor on T2 gate** |
| The T2 gate had no minimum speech density requirement. Clips where more than 70% of the |
| audio was ambient room tone or silence were admitted to STUDIO tier. This inflated |
| articulation_rate and distorted nPVI values for those clips. The fix requires |
| speech_ratio ≥ 0.30 for any clip to reach T2. |
|
|
| **High-SNR C50 bypass** |
| A fast path for loud recordings (SNR ≥ 35 dB) bypassed the C50 check entirely. A recording |
| made in a tiled bathroom at high volume could clear the SNR bar but still contain severe |
| reverb. This path was patched to apply the same C50 ≥ 20 dB and speech_ratio ≥ 0.30 |
| requirements as the standard T2 path. |
| |
| The full T2 gate post-fix requires **all three simultaneously**: |
| SNR ≥ 25 dB **and** C50 ≥ 20 dB **and** speech_ratio ≥ 0.30. |
|
|
| --- |
|
|
| ## What to use instead |
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|
| This folder contains corrected replacement files for both languages, plus five additional |
| languages, as the **v1.1 multilingual pack**: |
|
|
| | File | Language | Rows | Notes | |
| |---|---|---|---| |
| | `korean_cv24.parquet` | Korean | 6,805 | Replaces v1.0 (was 6,998 — difference is T2 gate correction + k5 suppression) | |
| | `hindi_cv24.parquet` | Hindi | 18,435 | Replaces v1.0 (was 18,447) | |
| | `hebrew_cv24.parquet` | Hebrew | 5,455 | New in v1.1 | |
| | `manx_cv24.parquet` | Manx | 6,579 | New in v1.1 | |
| | `tzeltal_cv24.parquet` | Tzeltal | 5,585 | New in v1.1 | |
| | `mdn_cv24.parquet` | Maguindanao | 5,536 | New in v1.1 | |
| | `lasi_cv24.parquet` | Lasi | 10,435 | New in v1.1 | |
|
|
| See `README.md` in this folder for full dataset documentation. |
|
|
| --- |
|
|
| ## Row count differences between v1.0 and v1.1 |
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|
| The v1.0 Korean file had 6,998 rows; v1.1 has 6,805 (-193 net). |
| The v1.0 Hindi file had 18,447 rows; v1.1 has 18,435 (-12 net). |
|
|
| The reduction reflects two changes applied together: |
| 1. Retroactive tier regrading — clips that passed the old T2 gate but fail the corrected |
| gate (missing C50 or speech_ratio) were downgraded to T3 and excluded from export. |
| 2. K-anonymity suppression — the k=5 quasi-identifier check is unchanged, but the |
| regraded tier distribution shifted some group sizes below threshold. |
| |
| Neither the source audio nor the Mozilla filenames have changed. The underlying clips are |
| the same; what changed is which clips meet the corrected STUDIO quality standard. |
| |
| --- |
| |
| ## Contact |
| |
| c.kleingertner@gmail.com |
| |
