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Captioning Solutions for Handheld Media and Mobile Devices. Geoff Freed Carl and Ruth Shapiro Family National Center for Accessible Media at WGBH Boston, Massachusetts http://ncam.wgbh.org/mm. About NCAM.

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captioning solutions for handheld media and mobile devices

Captioning Solutions for Handheld Media and Mobile Devices

Geoff Freed

Carl and Ruth Shapiro Family National Center for Accessible Media at WGBH

Boston, Massachusetts

http://ncam.wgbh.org/mm

about ncam
About NCAM
  • The Media Access Group at WGBH is a non-profit service (offices in Boston, Los Angeles, & New York)
    • The Caption Center (est. 1972)
      • the world\'s first captioning agency
      • makes audiovisual media accessible to audiences who are deaf or hard-of-hearing
    • Descriptive Video Service (est. 1990)
      • makes television, film & video accessible to audiences who are blind or visually impaired
    • The National Center for Accessible Media (est. 1993)
      • a research, development and advocacy entity
      • works to make existing & emerging technologies accessible to all audiences
        • digital television, convergent media, educational technologies, Web, multimedia
slide3
Part I:

Project Overview

project summary
Project summary
  • Explore and prototype methods for delivering captioned media to mobile devices of all kinds
  • Address the technical requirements for packaging and distributing captions
  • Examine ways for users to access and control caption data
project summary5
Project summary
  • Launched October 1, 2007 (http://ncam.wgbh.org/mm)
  • Partners and participants include...
    • AOL
    • Apple
    • HP
    • Open Media Network
    • Research In Motion
    • MacNeil/Lehrer Productions
    • Samsung
  • Funding provided by the U.S. Department of Education
project goals
Project goals
  • Publish demonstration models that show how to create, distribute, download and display captioned content on handheld devices
  • Publish usability research on accessible interface and caption-display options
  • Distribute information for content creators, service providers, and third-party tool developers to create and transcode captions
  • Detail the requirements necessary for non-proprietary as well as proprietary text and video formats to render captions
what s being tested
What’s being tested?
  • Phones, smartphones
  • PDAs
  • PMPs
  • Handheld television receivers
slide8
Mother says...

“Come on... do people really watch

TV and movies on telephones?”

slide9
Part II:

How movies or TV signals

get to a mobile device

how is video delivered to mobile devices
How is video delivered to mobile devices?
  • Downloaded from the Web and synced to mobile device
how is video delivered to mobile devices11
How is video delivered to mobile devices?
  • Downloaded or streamed via wireless network

directly to mobile device

how is video delivered to mobile devices12
How is video delivered to mobile devices?
  • Over data networks (e.g., EDGE, EV-DO, CDMA, GPRS, HSDPA, others) directly to mobile device
how is tv delivered to mobile devices
How is TV delivered to mobile devices?
  • Via dedicated mobile-television standard (MPH, ATSC-M/H, MediaFLO (North America), DVB-H, DMB (Europe, Asia), others:
      • V CAST (Verizon), CV (AT&T),

Sprint TV (Sprint), others

how are captions delivered
How are captions delivered?
  • Ideally…
    • as data tracks in downloaded or streamed video
    • as data carried along with the digital mobile-TV signal
  • Methods available today:
    • closed captions encoded into video for certain Apple devices (iPhone, iPod Touch, iPod Nano)
    • open captions visible in any format, playable on any player
slide15
Part III:

Devices, evaluations

what s being evaluated
What’s being evaluated?
  • Video support
    • what format(s)?
    • downlodable only, or streaming?
    • if streaming, can captions be received and controlled?
  • Closed-caption support
    • what format(s)?
    • how are they controlled?
what s being evaluated17
What’s being evaluated?
  • Will the device display open captions?
  • Characteristics
    • font face and size
    • text color
    • background type (transparent, translucent, solid)
    • background color
  • Can characteristics be controlled by the user?
devices currently under evaluation
Devices currently under evaluation

Apple iPhone

Apple iPod Nano

apple iphone
Apple iPhone
  • Video support: M4V; iPod player
  • Display: 3.5"/480x320
  • Caption support: closed (.scc format; pop-on and roll-up) and open
  • Closed-caption control: yes
  • Characteristics:
    • .scc:
      • white monospace font, black background
      • no user control
    • open:
      • determined by author
      • no user control
apple ipod nano
Apple iPod Nano
  • Video support: M4V; iPod player
  • Display: 2"/320x240
  • Caption support: closed (.scc format; pop-on and roll-up) and open
  • Closed-caption control: yes, via VideoSettings menu
  • Characteristics:
    • .scc:
      • white monospace font, black background
      • no user control
    • open:
      • determined by author
      • no user control
devices currently under evaluation29
Devices currently under evaluation

BlackBerry® Curve

8320™ Smartphone

blackberry curve 8320
BlackBerry Curve 8320
  • Video support: MP4, H.263, WMV; BlackBerry Media Player
  • Display: 2.5"/320x240
  • Caption support: open only
  • Caption control: none
  • Characteristics:
    • open captions only
      • style determined by author
      • no user control
devices currently under evaluation32
Devices currently under evaluation
  • HP iPAQ 210 PDA
  • HP iPAQ

510 Voice Messenger

hp 210
HP 210
  • Video support: WMV; Windows Media Player
  • Display: 4"/480x640
  • Caption support: open only
  • Caption control: none
  • Characteristics:
    • open captions only
      • determined by author
      • no user control
hp 510
HP 510
  • Video support: WMV; Windows Media Player
  • Display: 2"/176x220
  • Caption support: open only
  • Caption control: none
  • Characteristics:
    • open captions only
      • determined by author
      • no user control
devices currently under evaluation38
Devices currently under evaluation
  • Samsung BlackJack II

(i617)

samsung blackjack ii i617
Samsung BlackJack II i617
  • Video support: WMV; Windows Media Player
    • AT&T’s CV service (not yet evaluated)
  • Display: 2.4"/320x240
  • Caption support: open only
  • Caption control: none
  • Characteristics:
    • open captions only
      • determined by author
      • no user control
slide41
Part IV:

Upcoming work

what s next
What’s next?
  • Focus groups in Los Angeles and Boston
    • test a variety of caption-display options
    • ideas for caption-control interfaces
  • Continue studying caption-creation methods for mobile delivery
  • Begin creating prototypes of caption-control interfaces
  • Continue to work with standards groups
    • W3C’s Timed Text working group, Synchronized Multimedia working group, Mobile Web Initiative and the Video on the Web activity
    • ATSC M/H working group
  • Continue to work with vendors to develop and refine methods for creating and distributing caption data
  • Create working examples of captioned media
more information
More information
  • Project Web site: http://ncam.wgbh.org/mm
    • project summary
    • prototypes of captioned media for various devices
    • device-comparison chart
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