ISO IEC 23001-14-2019 amd1-2021 PDF

Full title and description

ISO/IEC 23001-14:2019/Amd 1:2021 — Information technology — MPEG systems technologies — Part 14: Partial file format — Amendment 1: Support for HTTP entities, enhanced file type and byte-range priorities. This amendment updates the 2019 Part 14 partial file format to add mechanisms for carrying HTTP entity metadata, improve file-type identification, and introduce priorities for byte-range repair and delivery to better support partial-file delivery and repair workflows.

Abstract

The amendment specifies additions to the ISO/IEC 23001-14 partial file format to enable embedding HTTP entity information (headers and associated body snippets), to extend/enhance file-type/brand identification, and to define byte-range priority semantics used when reconstructing or repairing partially received files. These changes make the partial file format more effective for HTTP-based delivery, caching and repair scenarios in modern content-distribution and streaming systems.

General information

• Status: Published
• Publication date: 7 October 2021
• Publisher: ISO/IEC (ISO in cooperation with IEC; developed by ISO/IEC JTC 1/SC 29)
• ICS / categories: 35.040.40 (Coding of audio, video, multimedia and hypermedia information)
• Edition / version: Edition 1.0 — Amendment 1 to ISO/IEC 23001-14:2019 (2021)
• Number of pages: 3 (amendment document)

(General information based on the ISO and IEC catalogue entries for the amendment and for ISO/IEC 23001-14:2019.)

Scope

This amendment applies to ISO/IEC 23001-14:2019 (Partial file format) and introduces support for carrying HTTP entity metadata and body snippets associated with a source URL, refines file-type/brand handling for partial files, and defines byte-range priority information to guide repair and retrieval of missing portions. Its scope is limited to extensions and clarifications that improve interoperability for partial-file delivery and repair over HTTP and related transports; it does not replace the base partial-file format but augments it.

Key topics and requirements

• Support for HTTP entity information (an HTTPEntity container to carry headers and body snippets tied to source URLs) to preserve HTTP metadata in partial-file contexts.
• Enhanced file-type/brand identification to improve recognition and handling of partial files derived from ISO base media file format derivations.
• Byte-range priority semantics: metadata fields and rules to indicate priority for repairing or fetching specific byte ranges when reconstructing files.
• Interoperability considerations with ISO base media file format (ISO/IEC 14496-12) derived formats and with MPEG systems technologies.

Typical use and users

Implementers and users include multimedia systems and application developers, CDN and caching engineers, client and server software vendors that support partial-file delivery and repair, streaming platform architects, and standards implementers working on MPEG systems and ISO base media file format-based containers. The amendment is intended for use where HTTP-based delivery, caching, and efficient repair of partially received files are required.

Related standards

Key related standards include the base document ISO/IEC 23001-14:2019 (Partial file format), the ISO base media file format ISO/IEC 14496-12 (foundation for file brands and container structures), other parts of the ISO/IEC 23001 (MPEG systems technologies) series (e.g., common encryption in ISO/IEC 23001-7), and media application formats such as the Common Media Application Format (CMAF — ISO/IEC 23000-19). These related documents define container semantics, encryption, and application profiles that commonly interoperate with the partial file format.

Keywords

partial file format, partial-file, HTTPEntity, byte-range priority, partial delivery, MPEG systems, ISO/IEC 23001-14, ISO BMFF, ISO/IEC 14496-12, CMAF, content repair, CDN, streaming

FAQ

Q: What is this standard?

A: It is Amendment 1 (2021) to ISO/IEC 23001-14:2019, an update that adds support for HTTP entity metadata, improved file-type identification, and byte-range priority handling to the MPEG partial file format.

Q: What does it cover?

A: The amendment covers technical additions to the partial file format to carry HTTP headers/body snippets, to extend file-type/brand semantics for partial files, and to provide priority indicators for byte ranges used during repair or retrieval operations. It augments — but does not replace — the 2019 Part 14 specification.

Q: Who typically uses it?

A: Multimedia software developers, CDN and caching engineers, streaming-platform implementers, and vendors implementing partial-file delivery and repair workflows that interoperate with ISO base media file format derived containers.

Q: Is it current or superseded?

A: The amendment was published in October 2021 and is an active published amendment to ISO/IEC 23001-14:2019; it remains the valid amendment document unless a later amendment or revision is published by ISO/IEC. For the base Part 14 standard, users should consult the ISO catalogue for any later revisions or reprints.

Q: Is it part of a series?

A: Yes — Part 14 is one part of the ISO/IEC 23001 MPEG systems technologies (MPEG‑B) series; it also interacts with other MPEG and ISO container standards such as ISO/IEC 14496-12 (ISO base media file format) and related parts of the 23000/23001 series like common encryption (23001-7) and CMAF (ISO/IEC 23000-19).

Q: What are the key keywords?

A: Partial file, HTTPEntity, byte-range priority, partial delivery, MPEG systems, ISO BMFF, CMAF.