Overview of IPTV Forum Japan s Hybridcast Technical SpecificaAon

Transcription

1 The fourth Web and TV Workshop Overview of IPTV Forum Japan s Hybridcast Technical SpecificaAon Kinji Matsumura, NHK 1

2 What is Technology pladorm for broadcast and broadband hybrid service that uses HTML5 as an applica<on service environment Mar 2013, IPTV Forum Japan published technical specifica<on Sep 2013, NHK started Hybridcast service Jan , Major commercial broadcasters are carrying out trial services Hybridcast- ready TV: Toshiba, Panasonic, Sharp, Mitsubishi. 2

3 This Presenta<on Introduces IPTV Forum Japan Hybridcast Technical SpecificaAon v1.0 Published in March English transla<on is now available at: hxp:// Describes how Hybridcast makes HTML5 apps work with broadcast content 3

4 Technical Specifica<on Integrated Broadcast- Broadband System Specifica6on System model lica<on model and its lifecycle control Receiver func<ons HTML5 Browser Specifica6on Guidelines and rules for applying HTML5 to Hybrid TV Extensions - Addi<onal JS objects and APIs * Hybridcast specifica<ons do not define profile for use of W3C standards, such as HTML elements, APIs and etc. 4

5 Overall Architecture Broadcaster Broadcast Hybridcast Receiver HTML5 browser Service Provider Web services server AIT Broadband network AIT * AIT: lica<on Informa<on Table control and management Extension for hybrid use Receiver funcaons Companion device control API Broadcast recep<on and decode Connec<on and Messaging Copyright NHK (Japan Broadcas<ng Corpora<on) All rights reserved. 5

6 1. licaaon Control and Management Broadcaster Service Provider Web services server Broadcast AIT Broadband network AIT control and management Hybridcast Receiver HTML5 browser Extension for hybrid use API Receiver funcaons Companion device control Broadcast recep<on and decode Connec<on and Messaging Copyright NHK (Japan Broadcas<ng Corpora<on) All rights reserved. 6

7 lica<on Launch by AIT Func<on of AIT Assign applica<on s execu<on context Entry URL, ID, boundary, permission Control applica<on s lifecycle Delivery Mul<plexed in broadcast signal Acquired over hxp Used in current opera<on lica<on is launched By broadcast AIT By func<on call in data broadcast content AIT is retrieved from network server Copyright NHK (Japan Broadcas<ng Corpora<on) All rights reserved. 7

8 2. Enhanced APIs for HTML5 Broadcaster Service Provider Web services server Broadcast AIT Broadband network AIT control and management Hybridcast Receiver HTML5 browser Extension for hybrid use API Receiver funcaons Companion device control Broadcast recep<on and decode Connec<on and Messaging Copyright NHK (Japan Broadcas<ng Corpora<on) All rights reserved. 8

9 Enhancements to HTML5 Objects/Func6ons lica<on object lica<oninforma<ontable object ReceiverDevice object EIT related objects StreamEventTarget object BMLCompatObject object Companion device collabora<on related func<ons Purpose An object which represents an applica<on itself. An object which represents applica<on control signals. An object which represents func<onali<es of a Hybridcast receiver and informa<on managed by a Hybridcast receiver. Objects which handle broadcas<ng program schedule informa<on. An object to handle stream events delivered over broadcast channel. An object to access to a part of func<onali<es of BML browser such as non- vola<le memory. Func<ons to instruct ini<al URL of an applica<on to run on companion devices and to send/receive messages to/from the devices are defined. BroadcastVideoObject element An object element with addi<onal type to represent broadcast video instead of video element in HTML5. 9

10 Presen<ng Broadcast Video/Audio Display video/audio of currently selected broadcast channel <object type="video/iptvf- broadcast"> CSS to specify coordina<on and z- order Broadcas<ng specific behavior Presenta<on of broadcast video/audio must be kept even during document transi<on 10

11 Broadcast Resource Access API Objects/Func6ons Purpose ReceiverDevice object getcurrenteventinforma<on() Obtain broadcast programme informa<on StreamEventTarget object EventIDUpdateListener Programme change detec<on GeneralEventMessageListener Trigger message (= StreamEvent) detec<on 11

12 3. Second- screen Service FuncAons Broadcaster Service Provider Web services server Broadcast AIT Broadband network AIT control and management Hybridcast Receiver HTML5 browser Extension for hybrid use API Receiver funcaons Companion device control Broadcast recep<on and decode Connec<on and Messaging Copyright NHK (Japan Broadcas<ng Corpora<on) All rights reserved. 12

13 Hybridcast s second- screen func<on HTML on TV Companion (NaAve ) HTML on Direct messaging over wifi Companion lica<on Works as a browser for HTML5 applica<on on second screen device. Makes direct connec<ons to TV over wifi. Is developed and distributed by TV manufacturer for mobile pladorm, i.e. Android / ios. Neutralizes a maker- dependant implementa<on of inter- device communica<on. 13

14 Companion Launch Sequence Broadcaster s server Manufacturer A s server maker.js implements the APIs to communicate with TV. maker.js 4. CA loads HTML app from the instructed URL. 5. on CA reads host-params from the URL and load maker.js 2. HTML app launches on TV by broadcast signal or user s action. HTML lication maker.js Embedded browser Companion application (manufacturer A) Companion device platform 1. User launches CA on companion device, then, CA discovers the receiver and establish connection. HTML lication Browser w/ Hybridcast extension Broadcast receiver platform (manufacturer A) 6. s on both ends communicate with each other using extended messaging APIs, i.e. sendtexttocompaniondevice(msg); 3. on TV calls seturlforcompaniondevice( url ); to instruct CA to load an app. Receiver platform automatically adds hip://broadcaster.jp/ca.html?host- params=hip://maker.jp/maker.js the maker-specific parameters to load 'maker.js' Copyright NHK (Japan Broadcas<ng Corpora<on) All rights reserved. 14

15 Communica<on APIs seturlforcompaniondevice() getcompaniondevicelist() sendtexttocompaniondevice() addcompaniondevicetextmessagelistener() 15

16 Conclusion Hybridcast is an actual prac<ce of Hybrid TV with HTML5 6 months since started. Overview of Hybridcast Technical Specifica<on To iden<fy further requirements Towards establishment of bexer environment for Hybrid TV services 16

17 Thank you for your axenaon 17