Embed Size (px)
DESCRIPTION
Citation preview
Skip PizziSenior Director, New Media Technologies
National Association of BroadcastersWashington, DC
• Standards development organization for digital television– Focused on terrestrial digital television
broadcasting
• The ATSC DTV Standard has been adopted throughout North America, in South Korea, and in several Central American and Caribbean nations.
• Migration path for upgrades in progress
About the ATSC
The Evolution of ATSC
ATSC DTV Standard (A/53) – “ATSC 1.0”
• Optimized for single-transmitter service (power-efficient)
• Spectrally efficient (especially important for regions with 6 MHz channelization)
• HDTV-capable from the start• Numerous incremental improvements to
date, with more to follow
ATSC 1.0 DTV• High definition video• Standard definition video• Multichannel sound
Mobile DTV
• Robust • AVC video• IP transport• HE AAC audio• Backward- compatible
3D-TV
• Multimode • Supplemental - Main channel - Mobile - Broadband
• Independent
ATSC 2.0
• AVC/MPEG-4 video coding• Non-real-time (NRT)• Conditional access• Digital rights management• Advanced EPG• Audience measurement
ATSC Evolution
ATSC 3.0
ATSC Flexibility
6
Increased Transmitted ResolutionIncreased Number of Services
720P 1080P/I480I 480P
Mobile & Handheld
FixedNon-real-tim
e
Real-time
Example #1
Example #2 Example #3
Example #4
Mobile Services 1 4 2 2 & 10 Audio Services
Relative Quality High Quality
Mid Quality
Mid Quality
Mid Quality
Video Bit Rate (kbps)
768 1600 800 800
Audio Bit Rate (kbps)
24 96 48 4
Mobile Total (Mbps)
3.688 7.336 3.668 5.502
Main/legacy (Mbps)
15.722 12.054 15.722 13.888
Flexible Mobile Service Combinations
• M-EAS is an enhancement of mobile DTV Standard to deliver emergency information to mobile/handheld receivers– Real-time– Non-real-time
• Common Alerting Protocol• NRT used to provide rich media assets
Evolution: Mobile Emergency Alert System
ATSC 3.0• ATSC 3.0 Next Generation Broadcast Television– Fundamental Technology Shift
• Flexible & Efficient• 3.0 must provide performance improvement and additional
functionality significant enough to warrant implementation of a non-backwards compatible system
– Timeframe Factors• Business requirements
• Regulatory (Spectrum) issues• Technology advancement
– Target Completion: 2016-2017
RevolutionRevolution
Application & Presentation (apps, player, UI, codecs, etc.)
Management, Service, Discovery
Protocols (Bitstream)
Physical
Layered Model
• Improved Coverage & Service
– Highly robust
– Support various network architectures
• High Power Central Transmitter
• Single Frequency Networks
• Hybrid
System Requirements
• Efficiency
– Number of bits available for a given
bandwidth (bits/hertz)
– Improved compression technologies
Example Target: Minimum of 6x
improvement compared to first-
generation systems
System Requirements
• Mobile & Handheld
• Ultra High Definition
– 3840 x 2160 (“4K”)
– 7680 x 4320 (“8K”)
System Requirements
• Flexibility/Scalability
– Bandwidth Utilization
• Cannot assume fixed-bandwidth channels
in future (such as 6, 7 or 8 MHz)
Example Target: System dynamically
configurable for 0.25 MHz to 25 MHz
channels
System Requirements
• Audio
– 22.2 Channel?
– Object-oriented?
– Metadata to support different listening
environments
• Accessibility
– Inherent support to meet needs of sensory-
impaired
16
System Requirements
• All first-generation systems (ATSC, DVB-T and ISDB) have similar performance– There are differences, but they are not significant
enough to be the basis for system selection
• All systems are evolving• Implementation cost for a given service
(HDTV, Mobile, etc.) are about the same for ATSC, DVB and ISDB – Although ATSC xmtr power requirements are lower
• Intellectual Property costs must be considered
Final Comments
Key Decision Points
• Caribbean region is diverse– Terrains, topologies and cultures vary widely
• ATSC favors independent, single-transmitter environments
• Focus on total cost to the consumer– Proximity to and critical mass of larger
neighboring markets is dominant factor
• Availability & time-to-market– Most flat-screen TVs in NTSC countries
already support ATSC 1.0
