ISO 21727:2016

Cinematography — Method of measurement of perceived loudness of short duration motion-picture audio material

Publication date: Apr 25, 2016

General information

Current stage: 90.60 Effective date: Sep 3, 2021

Originator: ISO

Owner: ISO/TC 36

Type: International Standard

ICS: 37.060.99

Languages: English

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Status: Published

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Scope

ISO 21727:2016 specifies a method of measurement of short duration motion-picture sound that allows assessment of the subjective loudness and annoyance of the sound recording when replayed at the recommended replay level in rooms aligned with the characteristics of ISO 2969. The specified method of measurement assesses the entire duration of the sound recording, typically commercials and trailers that do not exceed 3 min in length, with suitable channel summation, frequency weighting and time integration. It does not specify a maximum recommended level for such material and is solely aimed at describing a measurement method.
NOTE Typical recording and replay levels are discussed in Annex A.

Life cycle

PREVIOUSLY

Revises
ISO 21727:2004

NOW

PUBLISHED
ISO 21727:2016
90.60 Close of review
Sep 3, 2021

CORRIGENDA / AMENDMENTS

Amended by
ISO 21727:2016/NP Amd 1

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