Method

Audio dialnorm

DialNorm metadata validation (AC-3 / E-AC-3)

What we measure and how

Reads the DialNorm dialogue normalisation metadata embedded in AC-3 / E-AC-3 streams (SQC-459 / SQC-464). Validates that the declared value matches the spec's expected target. Skipped cleanly for non-AC-3 codecs.

Provenance

Standards

ATSC A/52 (AC-3)

Spec fields consulted

These Universal Media Delivery Profile paths resolve this check's thresholds against your spec snapshot at the moment the job was submitted.

• · assets.audio.loudness.dialnorm_expected

The full UMDP schema: /umdp.

Related methods

• Audio loudness range
• Audio loudness speech gated
• Audio quasi peak
• Clipping
• Loudness

Method identifier: audio_dialnorm