- National Datacast
-
National Datacast Incorporated (NDI) is a pioneer in data broadcasting.[1] It is a for-profit subsidiary of the Public Broadcasting Service (PBS) which handles datacasting on PBS TV stations throughout the United States.[1] Services using ATSC digital TV include MovieBeam and UpdateTV, for which bandwidth is leased by other companies.
National Datacast was formed in 1988 based on PBS' early work in closed captioning for the hearing impaired.[1]
It uses line 21 and other vertical interval lines for data transmission.[1]
References
- ^ a b c d Jones, Graham A. et al (2007). National Association of Broadcasters Engineering Handbook, 10th ed.. Focal Press. pp. 1458. ISBN 978-0240807515. http://books.google.com/books?id=V8Lk2ghPl7IC&lpg=PA1458&dq=national%20datacast&pg=PA1458#v=onepage&q=national%20datacast&f=false.
External links
Digital television in North America Terrestrial ATSC tuners · Digital subchannels · Virtual channels · Distributed transmission system · Datacasting (Guide Plus · National Datacast · UpdateLogic) · Metropolitan Television Alliance · Grand AllianceDigital standardsATSC Standards (ATSC · ATSC-M/H · 8VSB · A-VSB · E-VSB · PSIP · PMCP · full list) · Standard-definition TV (480i · 576i) · Enhanced-definition TV (480p · 576p) · High-definition TV (720p · 1080i · 1080p) · Serial digital interface · Smart antennas (CEA-909)Digital networkssee Template:American broadcast televisionNational deploymentCable Satellite TV DVB-S (Dish Network · GlobeCast World TV · Free-to-air receiver · Bell TV · Dish Network Mexico ) · DigiCipher 2 (4DTV · Shaw Direct) · Digital Satellite Service/DVB-S2 (DirecTV)IPTV AT&T U-verse · MSN TVTechnical issuesCategories:- Public Broadcasting Service
- Television organizations in the United States
- PBS stubs
Wikimedia Foundation. 2010.
