AS 4933:2024 specifies the requirements for equipment used in Australia for the reception of free-to-air (FTA) terrestrial VHF/UHF DVB-T broadcast television
Table of contents
Header
About this publication
Preface
Introduction
1 Scope and general
1.1 Scope
1.2 Application
1.2.1 General
1.2.2 Application to baseline television receivers
1.2.3 Application of appendices
1.3 Normative references
1.4 Terms and definitions
2 Minimum requirements for receivers
2.1 Introduction
2.2 Minimum receiver requirements
3 Receiver features
3.1 General
3.2 Terrestrial reception
3.2.1 DVB-T receivers
3.2.2 Decoding service format types
3.2.3 Capability of receiving analogue PAL-B transmissions
3.2.4 Advisory: Australian regulatory and safety requirements
3.2.4.1 General
3.2.4.2 Electrical safety
3.2.4.2.1 General
3.2.4.2.2 Mains voltage
3.2.4.2.3 Touch current
3.2.4.3 Electromagnetic Compatibility (EMC) and other ACMA regulations
3.2.4.4 Minimum Energy Performance Standards (MEPS)
3.3 Power on operations
3.3.1 First-time operation initialization
3.3.2 Subsequent switch on
3.4 User operation
3.4.1 Operating system
3.4.2 Receiver diagnostics and reset
3.4.3 Tuner functionality
3.4.3.1 Scanning to find services
3.4.3.2 Use TPS for transmission discovery
3.4.3.3 Manual entry of tuning details
3.4.3.4 Automatic detection of new or changed services
3.4.4 Assigning numbers to services and navigation
3.4.4.1 Logical Channel Numbering (LCN)
3.4.4.2 Services without LCNs
3.4.4.3 Duplicated LCNs
3.4.4.4 Finding duplicate LCNs
3.4.4.5 Follow broadcaster service changes
3.4.4.6 Linkage descriptor
3.4.4.7 Response to service changes — PSI and SI updates
3.4.5 Electronic Program Guide (EPG)
3.4.5.1 General
3.4.5.2 Use of EITschedule-program information
3.4.6 I-plate (information banner), OSD and navigation using EITp/f actual
3.4.6.1 General
3.4.6.2 Character set
3.4.6.3 Icons for special features
3.4.6.4 Parental guidance rating in the I-Plate
3.4.7 Signal strength and quality indicator
3.4.8 Selection of radio services
3.4.9 Service unavailable — On-screen service
3.4.9.1 Poor or no RF signal
3.4.9.2 Service selected that has no content or is “not running”
3.4.9.3 Incompatible service selected
3.4.10 User navigation
3.4.10.1 Basic navigation
3.4.10.2 Display of Closed Captions (CCs)
3.4.10.3 Selection of audio description services
3.4.10.4 Aspect ratio control (Optional)
3.5 RF performance, COFDM demodulation and channel decoding
3.5.1 General
3.5.2 RF performance
3.5.2.1 7 MHz transmission channel bandwidth
3.5.2.2 RF input channel loading allowance
3.5.2.3 Receiver sensitivity
3.5.2.4 Digital terrestrial receiver tuner’s frequency range
3.5.2.5 Channel offsets
3.5.2.6 Operation in Single Frequency Network (SFN) environment
B.8.1 Condition A: Small area SFN (where transmission site’s separation propagation delay is less than the guard interval)
B.8.2 Condition B: Wide area SFN (where transmission site separation propagation delay is greater than the guard interval GI)
Appendix C
Appendix D
Appendix E
Appendix F
Appendix G
G.1 Teletext standards for decoding and display
G.1.1 General
G.1.2 Display of captions
G.1.2.1 General
G.1.2.2 Notional grid for character location
G.1.2.3 Size of the notional grid
G.1.2.4 CC teletext row data
G.2 Reception of CCs from a DVB transport stream
G.3 Australian operational practice for Closed Captions
G.4 Identification of CCs in accordance with ETSI EN 300 472 Digital Video Broadcasting (DVB) — Specification for conveying ITU-R System B Teletext in DVB bitstreams
G.4.1 PES syntax
G.4.2 Variations to Program Presentation Time Stamps (PTS)
G.5 Display of live captions
Appendix H
H.1 Introduction
H.2 DVB Supplementary Audio Descriptor
H.2.1 General
H.2.2 Syntax and semantics for the Supplementary Audio Descriptor
H.2.3 PSI PMT signalling
H.2.4 EIT signalling
H.2.4.1 General principles
H.2.4.2 Visually impaired audio description
H.3 Audio Description SI/PSI Signalling
H.4 Audio Description SI/PSI Signalling for MPEG-4 HE AAC (ISO/IEC 14496-3)
H.5 Audio Description SI/PSI Signalling for MPEG-1 Layer II (ISO/IEC 11172-3)
Appendix I
I.1 Use of logical channel numbers (LCNs)
I.1.1 LCN syntax
I.1.2 Methods of displaying LCNs on a receiver’s OSD
I.1.3 Australian use of LCNs and variations from European usage
I.2 Overlap of translator and main transmitter programs
I.3 Dynamic response to changes in broadcasters’ transmissions
I.4 Setting time regions
I.4.1 General
I.4.2 Different time zones of Australian states
I.4.3 Broadcast TOT
I.5 Audio decoding — Part B
Appendix J
J.1 General
J.2 Australian requirements
J.2.1 General
J.2.2 Optionally displayed captions
J.2.3 Parental ratings issues
J.2.4 DRM
J.2.5 Program discovery and identification
J.3 Receiver IP connectivity
J.4 Presentation — Audio video capabilities
J.5 Links in the broadcast MPEG transport stream
J.5.1 Application information table (AIT) implementation
