S34: Applications and Presentation Layer. Madeleine Noland, S34 Chairman LGE

Transcription

1 S34: Applications and Presentation Layer Madeleine Noland, S34 Chairman LGE

2 S34 Organization S34-1 Video S34-2 Audio S34 S34-3 Conceptual Models S34-4 Interactivity Runtime Environment S34-5 Accessibility

3 S34-3 Conceptual Models Conceptual Models flesh out requirements developed by S31 Additional input was solicited to clarify requirements as needed Goal is to provide detailed input to guide detail/technical work in other SGs and AHGs Documents include: Service Conceptual Model Advanced Emergency Alerting Framework Personalization Conceptual Models Rendering/Accessibility Preferences Targeting/Demographics Service Usage Reporting Model Companion Device Model

4 S34-3 Service Conceptual Model Service Conceptual Model addresses the following questions What is a Service? What kinds of Services are possible? What is a Service composed of? How does it all go together?

5 S34-3 SCM: Types of Services Enhanced linear services Multiple, alternative components, apps and more OnDemand services Interactive Applications As enhancements to A/V services As stand-alone application services Audio-only services

6 S34-3 SCM: Service Components Audio, video, captions, applications Multiple alternative components Select one (e.g., choose an audio track) Select more than one (e.g., main view & PiP) May be user selectable (e.g., choose CC track) May be auto-selectable (e.g., receiver chooses the one it s capable of rendering)

7 S34-3 SCM: Hybrid Delivery Broadcast-only services All signaling and components delivered by terrestrial broadcast Hybrid services: Broadcast+broadband Some components/signaling delivered by broadcast and others by broadband, combined and synced at receiver Broadband hand-off capability E.g., to support temporary loss of RF reception All signaling and components temporarily delivered by broadband Note: pure OTT (i.e., no connection with or origination from broadcast) is out of scope of ATSC.

8 S34-3 SCM: Programs & Interstials Temporal divisons of a linear service or on-demand session Program: specific airing of a Show including any interstitials Show: The main event of a Program Segments: portions of a Show airing in a Program, typically separated by interstitials Interstitials: ads, promos, pledge drives, etc.

9 Flexible Service Model - Components Components Interactive App Closed Captions 2 Closed Captions CC CC Audio Audio App Audio App CC Audio 2 Audio Video 2 Video Video Video Video Hybrid broadcast/broadband delivery is possible And components can be dynamically selected and combined at the receiver. Program (time)

10 Video Enhanced HD UHD is a key goal of ATSC 3.0 Targeting small screens (HD) and big screens (UHD) High efficiency compression all proposals use HEVC Multiple, selectable video components 3D support Wide Color Gamut, HDR and Scalable Coding in consideration Lots more on Video in the afternoon sessions

11 Video Resolutions of up to Exact matrix of formats under discussion General agreement on progressive only for UHD resolution Frame rates of 24, 30 and 60Hz (integer & fractional) Plus 25Hz and 50Hz for international compatibility (integer) 120Hz in discussion (integer & fractional) High dynamic range and wide color gamut are in active discussion and anticipated to be included SHVC (scalable video) being tested to compare with simulcasting Aspects of legacy support are in discussion, including SD Closed Captions work has been separated from video work

12 Audio Immersive High spatial resolution in sound source localization in azimuth, elevation, and distance Increased sense of sound envelopment Targeted to various devices (fixed, mobile) Targeted to various speaker set-ups and headphones Lots more on Audio in the afternoon sessions

13 Audio - Personalization Selectable, mixable audio components Control of dialog hearing impaired can raise dialog level Alternate audio tracks alternate language tracks special commentary and music and effects Normalization of loudness, contouring dynamic range based on capabilities of the device and environment

14 Audio Progress Call for Proposals was issued The CfP included details of testing and evaluation for sound quality, codec efficiency and personalization features Two proposals currently under consideration: Dolby MPEG-H Alliance (Fraunhofer, Technicolor, Qualcomm) Proponents participating in tests as stipulated in the CfP Full test results expected by late summer

15 Interactivity Robust App Runtime Environment with HTML5 support Based on HbbTV 2.0 with restrictions and extensions HbbTV 2.0 was published earlier this year 20+ extensions being documented, several based on ATSC: A/105 (aka ATSC 2.0 ), now in Candidate Standard phase Changes being documented due to ATSC 3.0 IP delivery solution (HbbTV is based on MPEG-2 TS) Lots more to come on Interactivity in the afternoon sessions

16 Interactivity Profiles Working with CEA to bundle features into profiles One or more Universal Profile(s) are desired Advanced Profile(s) and/or Add-on Features are in discussion Goal is to promote adoption and use by app developers E.g., knowing which interactive features are supported in all devices vs. some devices Goal is to simplify receiver implementations E.g., profiles could require fewer test vectors than mix & match implementations

17 Interactivity a few sample uses Targeted ad insertion On demand content launcher Flexible use of display real estate, aka screen mash-up PiP, tickers, graphics, etc. T-commerce Voting and polling Games News and sports feeds Notifications and reminders The list goes on

18 Accessibility Generally agreed closed captions can be its own essence Recent decision to move closed captions work out of video group and into newly formed Accessibility group Initial focus: refine closed caption requirements Contributions will likely be solicited soon Again, more on this in the afternoon

19 Thanks. Questions?

20 ATSC 3.0 Do. More.

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