BS EN 62156-2001 PDF

Full title and description

STB — BS EN 62156:2001 — Digital video recording with video compression 12,65 mm type D‑9 component format 525/60 and 625/50 (Digital S). The document specifies the content, format and recording method of the data blocks containing video, audio and associated data that form the helical records on 12,65 mm tape cassettes, and the format of the longitudinal record containing tracking, cue audio and control tracks.

Abstract

This standard defines the tape- and data-level structures for Digital‑S (D‑9) 12.65 mm videotape cassettes using compressed component video (525/60 and 625/50). It covers the organization of helical (rotating-head) records carrying compressed video, multiple audio channels and associated metadata, plus the longitudinal control/cue/tracking records needed for reliable recording, playback and edit operations in professional broadcast and archival contexts.

General information

• Status: Published / Identical national adoption (BS adoption of IEC 62156:2001).
• Publication date: IEC base publication: 25 October 2001; BS national publication/adoption: 28 October 2002 (BS EN 62156:2001).
• Publisher: British Standards Institution (national adoption); original base publication by the International Electrotechnical Commission (IEC TC 100).
• ICS / categories: 33.160.40 – Video systems.
• Edition / version: Edition 1.0 (IEC 62156:2001); national adoption published as BS EN 62156:2001.
• Number of pages: National (BS) listing: 132 pages; IEC base document listing: 255 pages (format/annex differences between editions/adoptions are possible).

Scope

The standard applies to digital video recording on 12.65 mm tape cassettes using the D‑9 (Digital‑S) format. It specifies how compressed component video (525/60 and 625/50) plus up to four independent audio channels and associated metadata are packetized, recorded in helical tracks, and how longitudinal tracks are formatted for tracking, cue and control. The scope includes physical and logical record structures, timing and synchronization, edit points and basic conformance requirements for interoperability of recorders, VTRs and playback equipment.

Key topics and requirements

• Definition of helical-record data block formats for compressed video, audio and associated data (block and sector structure, subcode organization).
• Specification of longitudinal track formats for tracking information, cue audio and control signals.
• Video compression, macroblock/DCT organization, variable length coding and auxiliary video data (VAUX) handling.
• Audio channel sampling, channel allocation (up to four independent channels), AAUX and audio sector structure.
• Tape transport, mechanical and cassette dimensional tolerances specific to 12.65 mm D‑9 cassettes.
• Error detection/correction and modulation/formatting rules to support reliable recording and editing.
• Normative references and cross-references to video system parameters and timecode standards (ITU‑R BT.601, SMPTE timecode references noted).

Typical use and users

Primary users are broadcast and professional video equipment manufacturers (VTR designers, encoder/decoder suppliers), broadcast engineers, post‑production and archiving facilities, test and conformance laboratories, and media preservation specialists who require deterministic interchangeability and long-term playback of D‑9 (Digital‑S) media. The standard is used to ensure recorder/playback interoperability, correct decoding of compressed video and multi-channel audio, and to guide archival migration and restoration workflows.

Related standards

Related and cross‑referenced documents commonly cited in the normative annexes include IEC 62156 (base text), ITU‑R BT.601 (component video sampling/encoding recommendations), SMPTE timecode standards (e.g., SMPTE 12M) and other IEC/CENELEC standards on storage media and recording systems. National adoptions (EN/DIN/SIST etc.) implement IEC 62156 as an identical or harmonized text for regional use.

Keywords

Digital‑S, D‑9, 12.65 mm, video compression, helical recording, longitudinal track, component video, 525/60, 625/50, DCT, VAUX, AAUX, VTR, tape cassette, broadcast recording, BS EN 62156.

FAQ

Q: What is this standard?

A: BS EN 62156:2001 is the British (national) adoption of IEC 62156:2001 — a standard that defines the recording format and data structures for Digital‑S (D‑9) 12.65 mm videotape cassettes using compressed component video and multichannel audio.

Q: What does it cover?

A: It covers the logical and physical layout of recorded data on D‑9 cassettes: helical data block layout for compressed video/audio/metadata, longitudinal control and cue track formats, mechanical and timing tolerances required for interoperable recording and playback, and related error‑control and modulation rules.

Q: Who typically uses it?

A: Broadcasters, professional VTR and recorder manufacturers, post‑production and archiving facilities, test laboratories and standards/compatibility engineers working with D‑9 (Digital‑S) tape systems.

Q: Is it current or superseded?

A: The original IEC base document was published on 25 October 2001 and was adopted nationally as BS EN 62156:2001 (BS publication 28 October 2002). Some national implementations and later EN listings (e.g., EN adoptions and a 2007 EN listing) exist; users should check with the issuing body (IEC/BSI/CENELEC) for the absolute latest status or any subsequent revisions or withdrawals before relying on it for new procurements. The IEC record lists the 2001 edition as the base publication.

Q: Is it part of a series?

A: It is a stand‑alone IEC international standard prepared by IEC TC 100 (audio, video and multimedia systems) and is often referenced alongside other video and timecode standards; it is commonly adopted into EN and national catalogs as an identical text.

Q: What are the key keywords?

A: Digital‑S, D‑9, 12.65 mm, video compression, helical recording, longitudinal track, component video, 525/60, 625/50, VTR, BS EN 62156.