What changed between ATSC A/85:2013 and A/85:2026-07 for dialogue-gated measurement, target loudness, true peak and streaming?
ATSC A/85:2026-07 keeps the 2013 exchange targets (-24 LKFS with about +/-2 dB, true peak below -2 dBTP) but adds an approximately +/-0.5 dBTP meter tolerance not present in the 2013 section 6, adds Annex L (streaming) and Annex M (one-page summary), and states that BS.1770-3/-4/-5 share identical loudness and true-peak algorithms; Annex M says long-form dialogue level is measured with BS.1770-1 without the relative gate and describes a -23 to -27 LKFS practical range for streaming operators.
ATSC A/85:2026-07 keeps the 2013 exchange targets (-24 LKFS with about +/-2 dB, true peak below -2 dBTP) but adds an approximately +/-0.5 dBTP meter tolerance not present in the 2013 section 6, adds Annex L (streaming) and Annex M (one-page summary), and states that BS.1770-3/-4/-5 share identical loudness and true-peak algorithms; Annex M says long-form dialogue level is measured with BS.1770-1 without the relative gate and describes a -23 to -27 LKFS practical range for streaming operators.
Curator qualifications: Approval date (8 July 2026) not checked against the document text. Short-form full-mix measurement detail in Annex M not re-read verbatim. PDF text only; no loudness measured.
Limitations: ATSC recommended practice; FCC CALM context not re-read.
Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.
Structured fields
{
"citations": [
{
"url": "https://www.atsc.org/wp-content/uploads/2026/07/A85-2026-07.pdf",
"note": "A85-2026-07.pdf (pdftotext lines 53-56, 1200, 1430-1440); A85-2013-with-Corrigendum-No-1.pdf section 6 (lines ~1290-1297); A85-2026-07-Annex-M.pdf (lines 51, 60-70)"
},
{
"url": "https://www.atsc.org/wp-content/uploads/2025/06/A85-2013-with-Corrigendum-No-1.pdf",
"note": "A85-2026-07.pdf (pdftotext lines 53-56, 1200, 1430-1440); A85-2013-with-Corrigendum-No-1.pdf section 6 (lines ~1290-1297); A85-2026-07-Annex-M.pdf (lines 51, 60-70)"
},
{
"url": "https://www.atsc.org/wp-content/uploads/2026/07/A85-2026-07-Annex-M.pdf",
"note": "A85-2026-07.pdf (pdftotext lines 53-56, 1200, 1430-1440); A85-2013-with-Corrigendum-No-1.pdf section 6 (lines ~1290-1297); A85-2026-07-Annex-M.pdf (lines 51, 60-70)"
}
]
}Evidence claims
- [sourced_fact] ATSC A/85:2026-07 keeps the 2013 exchange targets (-24 LKFS with about +/-2 dB, true peak below -2 dBTP) but adds an approximately +/-0.5 dBTP meter tolerance not present in the 2013 section 6, adds Annex L (streaming) and Annex M (one-page summary), and states that BS.1770-3/-4/-5 share identical loudness and true-peak algorithms; Annex M says long-form dialogue level is measured with BS.1770-1 without the relative gate and describes a -23 to -27 LKFS practical range for streaming operators. · locator: A85-2026-07.pdf (pdftotext lines 53-56, 1200, 1430-1440); A85-2013-with-Corrigendum-No-1.pdf section 6 (lines ~1290-1297); A85-2026-07-Annex-M.pdf (lines 51, 60-70) source
Rights
| component | license | hosting | redistribution | modification | training | Evidence and notes |
|---|---|---|---|---|---|---|
| documentation | unknown | permitted | permitted | unknown | unknown | Applies to this original summary only, not to the cited sources. |