IEC 62297-2:2005 PDF

Name: IEC 62297-2:2005 — Triggering messages for broadcast applications - Part 2: Transport methods
SKU: IEC 62297-2:2005
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Triggering messages for broadcast applications - Part 2: Transport methods

Название (английский):

IEC 62297-2:2005

Triggering messages for broadcast applications - Part 2: Transport methods

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 13
Дата публикации:: 3 мая 2005 г.
Издание:: IEC IS 62297 edition 1 version 1
ICS:: 33.170

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Описание (английский):

IEC 62297-2:2005 specifies how trigger messages are broadcast using teletext technology. Both Page Format-Clear and Independent Data Line methods are defined, using protocols defined in ETSI EN 300 708. This bilingual version (2013-07) corresponds to the monolingual English version, published in 2005-05.

Abstract

Overview

Key topics and technical requirements

Transport methods
- Page Format‑Clear (teletext page-based):
  - Serial data stream comprised of Application Data Blocks, Structure Headers, Bundle Information Structures and Block Separators.
  - Each application byte is split into two 4‑bit nibbles and Hamming 8/4 encoded (per ETSI EN 300 706).
  - Page structure uses packets X/0, X/1–X/25 (data), and X/28/0 (page signature/format 1).
  - Default page number: 0x1E7; MIP code for trigger pages: 0xFC.
  - Maximum trigger message length limited to 1 022 bytes by Page Format‑Clear encoding.
- Independent Data Line (IDL) format B:
  - Designed for efficient serial data broadcast with Forward Error Correction (FEC) protecting user data.
  - Protocol stack: Trigger message → Framing protocol → FEC → IDL format B.
  - No inherent upper limit on trigger message size when using IDL format B.
Transmission considerations
- Bundle Information Structures are periodically inserted to identify application types (trigger application type recorded in ETSI TS 101 231).
- Packet X/28/0 format 1 provides an unambiguous page signature to help receivers detect trigger pages.
Interoperability
- Uses ETSI teletext protocols and references ISO/IEC MPEG extensions where applicable (MPEG-2 / DSM‑CC).

Applications and who uses it

Practical uses:
- Emergency alerts (severe weather, public safety).
- Programme content warnings (age/extreme content).
- Interactive prompts (voting, registration, commerce links).
- Pushing programme‑related URLs and timed actions to receivers.
Primary users:
- Broadcasters and service operators implementing data broadcast services.
- Set‑top box and TV manufacturers, receiver firmware developers.
- Middleware and application developers for interactive TV.
- System integrators and regulators specifying broadcast signalling.

Related standards

IEC 62297-1 - Triggering messages: Format
ETSI EN 300 708 - Data transmission within Teletext
ETSI EN 300 706 - Enhanced Teletext specification
ETSI TS 101 231 - Register of CNI/VPS/Application codes
ISO/IEC 13818-6 - MPEG-2 DSM‑CC extensions

Keywords: IEC 62297-2, triggering messages, teletext transport, Page Format‑Clear, Independent Data Line, IDL format B, ETSI EN 300 708, Hamming 8/4, broadcast trigger messages, FEC, interactive TV.

Технические детали

Технический комитет: TC 100 - Audio, video and multimedia systems and equipment
SKU: IEC 62297-2:2005

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