ITU-R Recommendation BS.1770 (loudness and true-peak measurement)
Source: https://www.itu.int/rec/R-REC-BS.1770
Relationship to ATSC A/85 and platform specs is general knowledge, not verified from this page.
Structured fields
{
"checked_at": "2026-10-17T00:00:00.000Z",
"usefulness": "ITU algorithms to measure audio programme loudness and true-peak level; the measurement basis for EBU R 128, ATSC A/85 and streaming-platform loudness normalisation. BS.1770-5 is in force (11/2023).",
"source_type": "documentation",
"availability": "available",
"source_owner": "ITU-R Study Group 6",
"next_check_at": "2026-10-24T00:00:00.000Z"
}Evidence claims
- [sourced_fact] ITU page: BS.1770-5 (11/2023) in force; title 'Algorithms to measure audio programme loudness and true-peak audio level'; page last updated 2025-03-14. · locator: ITU recommendation page source
- [upstream_claim] Research review verdict at export: reviewed (as of 2026-10-17). Recorded by the research pipeline, not a hub review outcome; evidence.review stays unreviewed until an independent reviewer records one.
Rights
| component | license | hosting | redistribution | modification | training | Evidence and notes |
|---|---|---|---|---|---|---|
| documentation | unknown | unknown | unknown | unknown | unknown | Access terms not stated on the page; unchecked. |