HD/DTV and the Closed Captioning Food Chain

Metadata

Publisher: SMPTE — White Plains, NY
Doc Type: Conference Paper
Content Type: Original Research
Volume: 1999, No. 8, pp. 1–7
Abstract: More than 20 million people in North America are either hard of hearing or clinically deaf. Closed Captioning television techniques provide these viewers, with the ability to appreciate the audio speech as well as the video content of the programs being offered. Closed Captioning is also useful in noisy environments, subtitling of foreign languages and for educational material In the NTSC television system, captions are encoded onto line 21 of the Vertical Blanking Interval (VBI). This data may be decoded by the NTSC television set and displayed as subtitles on the screen. The advent of DTV brings enhancements to captioning capabilities and new challenges for the television engineer. It becomes necessary to encode the DTV EIA-708 compliant closed captioning data into the DTV bitstream, at the same time as retaining the NTSC captions required by EIA-608 compliant receivers.
Publication Date: 1999-11-01
DOI: 10.5594/M00315
Link: https://doi.org/10.5594/M00315
Author(s): David StrachanEvertz Microsystems Ltd., Burlington, Ont., Canada
bio
David Strachan is Director of Sales with Evertz Microsystems Ltd, of Burlington, Ontario, Canada. Strachan obtained his Grad. IERE membership in the UK in 1970 and has held sales and marketing positions with EMI and Rank in the UK and several transmitter and satellite equipment suppliers in Canada. He served as International Sales Manager and Director of Marketing for Leitch Technology, where he authored numerous articles on DTV and HDTV for the SMPTE journal, before assuming his current position at Evertz.
Copyright: © 1999 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. Digital Television (DTV) Closed Captioning - EIA-708 Electronic Industry Alliance. EXTERNAL
2. Captioning and the Law - http://www.fcc.gov/dtf/ccrules.html . EXTERNAL
3. SMPTE draft proposals on Vertical Ancillary Data Mapping for 292M Bit-Serial Interface. EXTERNAL
4. Frequently Asked Questions about Captioning - www.wgbh.org/wgbh/pages/captioncenter/faq.html . EXTERNAL

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David Strachan; HD/DTV and the Closed Captioning Food Chain, SMPTE Meetings and Conferences ( November 1999); SMPTE, 1999. Available at https://doi.org/10.5594/M00315

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<span class="citation">David Strachan; <cite>HD/DTV and the Closed Captioning Food Chain</cite>, SMPTE Meetings and Conferences ( November 1999); SMPTE, 1999. Available at <a href="https://doi.org/10.5594/M00315" target="_blank" rel="noopener">https://doi.org/10.5594/M00315</a></span>

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David Strachan; HD/DTV and the Closed Captioning Food Chain, SMPTE Meetings and Conferences ( November 1999); SMPTE, 1999
doi: 10.5594/M00315
url: https://doi.org/10.5594/M00315

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David Strachan; <cite id="bib-10-5594-m00315">HD/DTV and the Closed Captioning Food Chain</cite>, SMPTE Meetings and Conferences ( November 1999); SMPTE, 1999
<span class="doi">10.5594/M00315</span>
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