---
language:
- uz
- ru
task_categories:
- automatic-speech-recognition
tags:
- forced-alignment
- nemo
- stt-training
- instinct-org-catalog
gated: manual
extra_gated_heading: Request access to Instinct speech data
extra_gated_description: Requests are reviewed manually. Approval is not automatic and may be revoked
  if the dataset terms are violated.
extra_gated_prompt: By submitting this request, you agree to use the dataset only for the stated purpose,
  follow its license and privacy terms, and not redistribute the data.
extra_gated_fields:
  Organization: text
  Country: country
  Intended use:
    type: select
    options:
    - Research
    - Education
    - Commercial evaluation
    - Other
  Project description: text
  I agree to the dataset terms and redistribution restrictions: checkbox
pretty_name: Cv Chunked Nfa Aligned
---

# Forced-Aligned STT Dataset

Source dataset: `instinct-org/cv_chunked`

Aligned dataset: `instinct-org/cv_chunked_nfa_aligned`

Rows: 71097 successfully aligned rows

This dataset adds NeMo Forced Aligner metadata for STT training and timestamp quality
control. Source rows that did not produce usable CTM alignments are excluded from the
published data.

Added columns:

- `nfa_token_alignments`: NeMo token/subword CTM spans
- `nfa_word_alignments`: word-level CTM spans
- `nfa_segment_alignments`: segment-level CTM spans
- `nfa_character_alignments`: character spans; true only when the model token CTM is character
  level, otherwise derived from word spans
- `nfa_character_alignment_source`
- `nfa_true_character_alignment`
- `nfa_alignment_model`
- `nfa_alignment_status`
- `nfa_alignment_error`

NeMo Forced Aligner emits token, word, and segment CTM levels for this model family. With
BPE/subword ASR models, token level is not the same as character level.

Model: `nvidia/stt_uz_fastconformer_hybrid_large_pc`

<!-- instinct-org-catalog:start -->
## Data product classification

- **Family:** `cv`
- **Purpose:** `stt`
- **Lifecycle state:** `aligned`
- **Schema:** `stt-v1`
- **Access policy:** `public-manual-v1` (manual approval)
- **Catalog:** [instinct-org/speech-data-catalog](https://huggingface.co/datasets/instinct-org/speech-data-catalog)

Exact parent revisions and processing recipes are being registered in the catalog. Until that lineage review is complete, do not infer processing order solely from the repository name.
<!-- instinct-org-catalog:end -->