ATSC 3.0 Next Generation Television

Transcription

1 ATSC 3.0 Next Generation Television Where are We and Where are We Headed? Rich Chernock JUNE 8, 2018

2 ATSC 3.0 has been released!

3 What we ve achieved Extensibility / Flexibility Bootstrap (A/321) starting point Possible to evolve system/physical layer Bootstrap Signal Preamble Frame Announces technology used in each frame Layers signal technologies to layer above Allows graceful evolution over time Frequency... L1-Basic Signaling L1-Detail Signaling Sub-Frame Payload Sub-Frame Payload... Sub-Frame Payload Time Bootstrap emission is the starting point for ATSC 3.0 Robust synchronization Service discovery Coarse time, frequency acquisition 5 MHz bandwidth Receivable at < 6 db SNR (with FER = 1E-2) 24 signaling bits Sampling frequency Channel bandwidth EAS wake-up Preamble selection Preamble frame control Basic / detail

4 Results Flexibility, Longevity & Public Service Bootstrap allows mixture of different phy technologies in a single broadcast Extensibility via versioning & mixture of phy s Can support a mixture of today s phy tech along with tomorrow s in a way that allows a receiver to utilize what it understands Wake-up of receiving devices in standby mode in case of an emergency situation Mechanisms to reduce annoyance factor & battery conservation (for mobile devices)

5 What we ve achieved Extensibility / Flexibility Physical Layer that meets broadcasters needs/plans Close to Shannon Limit TDM/FDM/LDM Multiple PLPs SFN Lots of knobs to turn 5 db 6 db RF Channel LDM overlay spectrum BW BICM Link Efficiency (bits/s/hz) Core Layer Enhanced Layer Future Extension Layer Shannon Limit ATSC 3.0, QPSK ATSC 3.0, 16QAM ATSC 3.0, 64QAM ATSC 3.0, 256QAM ATSC 3.0, 1024QAM ATSC 3.0, 4096QAM ATSC 1.0 Bit Interleaving, Coding, and Modulation Performance SNR (db) > Indoor penetration

6 Results - Better coverage & deep indoors via SFN Radio Horizon Indoor penetration Multiple transmitters in a SFN can be used to extend coverage and add capacity by raising the SNR. OFDM guard interval alleviates potential intersymbol interference arising from multiple transmitters.

7 Results - More efficient use of BW for Fixed + Mobile SHVC (Video Spatial Scalability) Base layer (BL) optimized for mobile reception Enhancement layer (EL) optimized for UHD resolution Considerable efficiency advantage vs simulcast is possible Mobile/Portable Channel Mobile / distant receiver 2x downscaling SHVC encoder BL encoder (HD) EL encoder (UHD) HD, audio UHD video High robustness High BW ATSC 3.0 PHY layer Fixed receiver HEVC decoder Fixed channel SHVC decoder

8 What we ve achieved Extensibility / Flexibility Physical Layer that meets broadcasters needs/plans Smart Media Delivery Broadcast IP Transport Segmented streaming delivery Hybrid combined broadcast & broadband delivery Common System Time Realtime & NRT ISOBMFF file MPU Player/Decoder EME/CENC MPU (ISO BMFF) MMTP MMT-specific Signaling ROUTE-specific Signaling LLS (SLT) UDP IP ATSC Link-Layer Protocol (ALP) Broadcast Announcement ATSC 3.0 Physical Layer (OFDMA RF) Applications (HTML5/JavaScript) NRT File Deliver y HTTP Proxy ROUTE Tablet WiFi DASH Player/Decoder EME/CENC DASH Segment (ISO BMFF) ftyp moov moof mdat moof mdat Smart TV Internet PC 4G Smartphones HTTP TCP IP Data Link Layer Physical Layer Broadband moof NRT File Deliver y ftyp moov styp moof mdat styp moof mdat moof mdat All Signali ng Object s Initialization Segment Media Segment Media Segment mdat

9 Results Broadcasting no longer an independent silo Use of IP allows taking advantage of evolution speed of the Internet Broadcast and broadband as peer delivery mechanisms Enables new types of hybrid services Ability to seamlessly incorporate niche content Enable new business models Localized insertion of ads or other content New revenue model for broadcasters that has previously been available to only cable or IPTV operators Addressable advertising Smart TV Tablet WiFi Internet PC 4G Smartphones

10 What we ve achieved Extensibility / Flexibility Physical Layer that meets broadcasters needs/plans Smart Media Delivery Enhanced Story-Telling UHD: 4K, HDR, WCG, HFR, Scalability Fully immersive Audio Personalized audio HTML 5 based interactivity Net Crowd Announce NORMAL PA Local Announce

11 Results Retain (and attract) viewership via high quality content capabilities Video: More dots (4K), More contrast (HDR), More colors (WCG), Smoother motion (HFR) Audio: Personalization (early), full immersion (later) New business models possible Broadcaster App drives new functionality Targeted ad insertion NRT content usage Interactivity based on W3C tech (including HTML5) No need to train content creators how to do things for TV as opposed to Internet

12 What we ve achieved Extensibility / Flexibility Physical Layer that meets broadcasters needs/plans Smart Media Delivery Enhanced Story-Telling System that meets public service needs Accessibility: Closed Captioning, Open Captioning, Descriptive Video Advanced Emergency Alerting Wakeup from standby Geotargeting & rich media

13 Results: Accessibility Features ATSC 3.0 brings new public service capabilities Robust audio and closed-caption transmission, even when picture fails Improved audio intelligibility for hearing impaired New features for improved dialog / narrative intelligibility (track-specific volume control) Continued support for video description services ATSC 3.0 feature set supports Visually Impaired (VI) Video Description Hearing Impaired (HI) Closed Caption Closed Signing Dialog Intelligibility Emergency alerts and messaging Emergency crawls and audio tracks

14 Results Streamlining accessibility workflow & more efficient delivery Use of audio objects with rendering at the receiver Allowing more capabilities than in the past More simultaneous audio languages Simultaneous ASL video window Enabling full audio experience when accessible audio features used Allows broadcasters to bring additional value to community through Advanced Alerting capabilities Wake-up sleeping devices Geotargeting Rich Media

15 What we ve achieved Extensibility / Flexibility Physical Layer that meets broadcasters needs/plans Smart Media Delivery Enhanced Story-Telling System that meets public service needs Security CA & DRM Secure broadband communications Application signing Securing the broadcast from MITM attacks

16 ATSC 3.0 Security System-wide security is a critical function today for any Internet-connected device A TV set that can be hacked? Yes! Content protection for high-value programs is very important Digital Rights Management (DRM) is an essential requirement for content providers Security enables new business models for ATSC 3.0 Subscription services Monthly fee for access to the service Freemium (i.e., user registers and then content is free) Subscription options for alternate components Custom views; e.g., pay for dashboard cam video in an auto racing event Pay-per-view programs HD free-to-air, UHD subscription service

17 Results Content Encryption (CA and/or DRM) Allows charging for premium content Allows use of Freemium model For example, agreement to allow anonymous usage monitoring in return for access to extra/premium content Allows protection of content once it arrives on receiving device Allows transactions over the Internet Return channel has same concerns as general Internet use, but same technology solutions can be used Provides protections against MITM attacks Application & Signaling Signing Use of DRM on content & signed signaling

18 What we ve achieved Extensibility / Flexibility Physical Layer that meets broadcasters needs/plans Smart Media Delivery Enhanced Story-Telling System that meets public service needs Security Part of the 5G eco-system P2MP, IoT, high speed, ultra-reliable, lifeline communications

19 Why Do We Need This? OPPORTUNITY!

20 Catching a tiger by the tail (make sure you hold on) In the past, television technologies were stable for long periods of time Now, technology is changing at an exponentially increasing rate NTSC ATSC 1.0 ATSC 3.0 For ATSC 3.0 Recognition that graceful evolution of technology is now required A desire to become part of the internet & use its tech (the tiger) Approach Major/Minor versioning & signaling for technologies Ability to signal capabilities required to render content Use of W3C technologies & mechanisms to keep current

21 ATSC 3.0 in South Korea Milestones ATSC 3.0 4K UHD Broadcasting started May 31, 2017 PyeongChang 2018 Olympic Winter Games broadcast in UHD

22 Slide courtesy of KBS

23 Slide courtesy of KBS

24 Slide courtesy of KBS

25 Slide courtesy of KBS

26 Questions?