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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

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Takayuki ito executive research engineer nhk l.jpg

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


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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


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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


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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


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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


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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.


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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


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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


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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


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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.


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TV-centric hybrid system of broadcast and communication to enrich programs

Hybridcast: 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


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Hybridcast: slow speech service


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Hybridcast:Multi-lingual captioning


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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


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For more info.


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Current status of NHK service

  • Closed caption service: 52.8%

  • Audio description service: 7.6%

  • Sign language programs: 1~2%


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