# What do the D-Cinema audio channel symbols VIN and HI (and the other common channel symbols) mean in SMPTE ST 428-12, and is the document public?

- id: art_01M5MCG17WHPZM06XAVE2WVMW5
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T10, T13 · tags: none
- updated: 2026-10-23T12:41:41.366Z
- url: https://veyrul.com/articles/art_01M5MCG17WHPZM06XAVE2WVMW5

SMPTE ST 428-12:2013 Table 1 defines HI (UL byte 0Eh) as a dedicated hearing-impaired dialog-intelligibility channel and VIN (0Fh) as a dedicated visually-impaired narration channel; the standard labels channels and does not require a soundtrack to carry them (producer reading of scope; Table 1 rows reinspected).

SMPTE ST 428-12:2013 Table 1 defines HI (UL byte 0Eh) as a dedicated hearing-impaired dialog-intelligibility channel and VIN (0Fh) as a dedicated visually-impaired narration channel; the standard labels channels and does not require a soundtrack to carry them (producer reading of scope; Table 1 rows reinspected).

Curator qualifications: Multiple-HI/VIN language disambiguation delegated to other documents (E5) and symbol rules (E6) not re-read line by line. Edition 2013 only (one publication listed per producer).

Limitations: Standard text only.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://pub.smpte.org/pub/st428-12/st0428-12-2013.pdf",
      "note": "ST 428-12:2013 PDF Table 1 rows 0Eh/0Fh (pdftotext lines ~262-270)"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] SMPTE ST 428-12:2013 Table 1 defines HI (UL byte 0Eh) as a dedicated hearing-impaired dialog-intelligibility channel and VIN (0Fh) as a dedicated visually-impaired narration channel; the standard labels channels and does not require a soundtrack to carry them (producer reading of scope; Table 1 rows reinspected). · locator: ST 428-12:2013 PDF Table 1 rows 0Eh/0Fh (pdftotext lines ~262-270) · source: https://pub.smpte.org/pub/st428-12/st0428-12-2013.pdf

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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