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ITU-EBU Joint Workshop on Accessibility to Broadcasting and IPTV ACCESS for ALL ( In cooperation with the EU project DTV4All) Geneva, 23 – 24 November 2010. Activities to Improve Accessibility to Broadcasting in Japan. Takayuki ITO, Executive Research Engineer NHK. Situation in Japan.

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takayuki ito executive research engineer nhk
ITU-EBU Joint Workshop on Accessibility to Broadcasting and IPTV ACCESS for ALL(In cooperation with the EU project DTV4All)Geneva, 23 – 24 November 2010

Activities to Improve Accessibility to Broadcasting in Japan

Takayuki ITO,

Executive Research Engineer

NHK

situation in japan
Situation in Japan
  • Digitalization of broadcasting(DB)
  • More pressure for better accessibility to broadcasting
    • DB receiver has 4 audio, 2 closed caption
  • Government set a target of services
    • 100 % programs for closed caption
    • 10 % programs for audio description
    • by the end of 2017
slide3
Stats of Closed captioning

NHK CH1

Target of Gov.

100% programs by the end of 2017

Off-line cap.

Drama, documentary, etc.

30%

50%

Without caption

With caption

Live

10%

10%

Stenograph

Part of new programs, Some live shows

Re-speak captioning

using speech rec.

Sport programs, some live shows

Re-speaker

slide4
News captioning system with speech recognition
  • Recognize speech of announcer and reporter
  • Recognize re-soken speech for interview
    • Captioning accuracy : 98 % for short news
    • Accuracy and operating efficiency increase
  • Spontaneous speech is an issue to solve

Direct

Captioning

correction

Speech rec.

Announcer

Reporter

Voice

text

Re-speak

Operator 1~2

Interview

4

japanese to sign machine translation with cg avatar
Japanese-to-Sign machine translation with CG avatar
  • Deaf people claim sign language service rather than captioning but …
    • Sing language interpreter is not easy to find.
    • Closed service is preferable.

broadcast

Program

Text-to-sign translation

station

home

Broadcast/Internet

Sign CG

audio description service for visually impaired people
Audio description service for visually impaired people
  • Audio description service (AD) 7.6%(2009)  10%(2017)
  • AD is a kind of radio drama andman-power consuming to create.
  • Assist system for writing script of AD
    • detects silent spaces, estimates word count, and adjusts length by speech rate conv.
    • proposes candidate phrases if electronic script of original program is available.
information barrier free for the visually impaired
Information barrier-free for the visually impaired

Tactile broadcasting

3D shape/tactile

Force feedback display

2Dshape

Tactile display for GUI, shape, graph, etc

Text

Access to digital broadcasting

speech rate conv for elderly
Speech rate conv. for elderly
  • Triggered bya letter “Announcers’ speech is too fast to understand.”
  • Commercialized as TV, radio sets, and interenet service

Evaluation experiment

fast read out for visually impaired people
Fast read-out for visually impaired people
  • Needs for “fast hearing” of electronic text (internet, e-mail, e-book)
    • Developing a faster (2~4x) and more understandable conversion method
    • Daisy machine and software

Evaluation experiment

Experiment in Austria

needs to convey various information to the home
Needs to convey various information to the home
  • To fulfill personal needs requires more bandwidth than digital broadcasting.
    • HybridCast is a new system that convey supplemental information through communication channel to enrich broadcasting programs.
    • Multi-lingual closed caption and closed sign service are typical examples.
hybridcast concept and technology
TV-centric hybrid system of broadcast and communication to enrich programsHybridcast: concept and technology

Broadcasting

(broadcast, quality, reliability)

program

Hybridcastreceiver

Communication

(meet personal request)

Broadcast station

Additional information

Network

(cloud)

Synchronization

CGM, SNS

Content control/ delivery

slide14
Conclusion
  • Technologies of commercializing level
    • Need a bridge over “the death valley”, a gap between R&D and commercialization.
      • Overcome the principle of economics
      • Reduce the operating cost
  • Technologies of basic research level
    • Need efficient research
      • Sharing the results and research collaboration is important.

14

current status of nhk service
Current status of NHK service
  • Closed caption service: 52.8%
  • Audio description service: 7.6%
  • Sign language programs: 1~2%
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