ATSC 3.0 – Next Generation Television€¦ · – Bootstrap (A/321) – starting point – Possible to evolve system/physical layer • Announces technology used in each frame –

ATSC 3.0 – Next Generation TelevisionWhere are We and Where are We Headed?

Rich Chernock

JUNE 8, 2018

ATSC 3.0 has been released!

What we’ve achieved

Time

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Bootstrap Signal Frame

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Preamble

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Sign

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L1-D

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• Extensibility / Flexibility– Bootstrap (A/321) – starting point– Possible to evolve system/physical layer

• Announces technology used in each frame

– Layers signal technologies to layer above– Allows graceful evolution over 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

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)

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

0

2

4

6

8

10

12

-10 -5 0 5 10 15 20 25 30 35

BIC

M L

ink

Effic

ienc

y (b

its/s

/Hz)

SNR (dB)

Bit Interleaving, Coding, and Modulation Performance

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

LDM overlay spectrum

RFChannel

BW

5 dB

Core Layer6 dB

Enhanced Layer Future Extension Layer

> Indoor penetration

Results - Better coverage & deep indoors via SFN

Multiple transmitters in a SFN can be used to extend coverage and add capacity by raising the SNR.

OFDM guard interval alleviates potential inter-symbol interference arising from multiple transmitters.

Indoor penetration

Radio Horizon

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

SHVC encoder

BL encoder(HD)

EL encoder(UHD)

2x down-scaling ATSC

3.0 PHY layerUHD

video High BW

High robust-ness

HD, audio

HEVC decoder

SHVC decoder

Mobile / distant receiver

Fixed receiver

Mobile/Portable Channel

Fixed channel

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

Physical Layer

ATSC Link-Layer Protocol (ALP) Data Link Layer

IP IP

UDP TCP

MMTP ROUTE

HTTP ProxyHTTP

MM

T-sp

ecifi

c Si

gnal

ing

ROU

TE-s

peci

fic

Sign

alin

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MPU (ISO BMFF)

NRT File

Delivery

DASH Segment (ISO BMFF)

NRT File

Delivery

All Signali

ng Object

s

DASH Player/DecoderMPU Player/Decoder

Broadcast Broadband

LLS (SLT)

EME/CENC EME/CENC

Anno

unce

men

t

Applications (HTML5/JavaScript)

ATSC 3.0 Physical Layer (OFDMA RF)

Tablet

WiFi

Smartphones

4G

Smart TV

Internet

PC

moovftyp moof mdatmoof mdatmoof

moovftyp moof moof moofstyp styp

ISOBMFF file

Initialization Segment Media Segment Media Segment

mdat

mdat mdatmdat

ResultsBroadcasting 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

Tablet

WiFi

Smartphones

4G

Smart TV

Internet

PC

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

NetAnnounce

Crowd

NORMAL

LocalAnnounce

PA

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

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

Results: Accessibility FeaturesATSC 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

ResultsStreamlining 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

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

ATSC 3.0 SecuritySystem-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

ResultsContent 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

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…

Why Do We Need This?

OPPORTUNITY!

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

ATSC 3.0 in South Korea

MilestonesATSC 3.0 4K UHD Broadcasting started May 31, 2017PyeongChang 2018 Olympic Winter Games broadcast in UHD

Slide courtesy of KBS

Slide courtesy of KBS

Slide courtesy of KBS

Slide courtesy of KBS

Questions?

• [email protected]• www.trivenidigital.com

www.atsc.org