North America Datacasting

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1 north america

1.1 ambient information network
1.2 rbds
1.3 directband
1.4 moviebeam
1.5 tv guide on screen
1.6 atsc-m/h
1.7 updatetv





north america
ambient information network

ambient information network, datacasting network owned ambient devices presently hosted u.s.a. mobility, u.s. paging service , focuses on information of interest local (or larger) area, such weather , stock indices, , paid subscription ambient provide particular device more personalized information.with dish sat


rbds

a slight variation of european radio data system, rbds carried on 57khz subcarrier on fm radio stations. while intended program-associated data, can used datacasting purposes including paging , dgps.


directband

directband, owned microsoft, uses 67.65 khz subcarrier leased fm radio stations. subcarrier delivers 12 kbit/s (net after error correction) of data per station, on 100 mb per day per city. data includes traffic, sports, weather, stocks, news, movie times, calendar appointments, , local time.


moviebeam

the now-defunct moviebeam service used dntsc technology dotcast transmit 720p hdtv movies in lower vestigial sideband of ntsc analog tv. set-top box stored movies viewed on demand fee. distributed through pbs s national datacast.


tv guide on screen

tv guide on screen advertising-supported datacast sent 1 local station in each media market. supplements or replaces limited electronic program guide sent each tv station, mandated u.s. federal communications commission (fcc).


atsc-m/h

atsc-m/h yet mobile tv standard, although transmitted , controlled broadcasters instead of third party, , therefore free air (although can subscription-based). technical standpoint, ip-encapsulated datacast of mpeg-4 streaming video, alongside atsc mpeg transport stream used over-the-air hdtv/sdtv broadcasting. heavy error correction, separate native atsc, compensates atsc s poor mobile (and fixed) reception.


updatetv

updatetv service used brands of tv sets , other atsc tuners update firmware via over-the-air programming. transmitted on pbs stations via national datacast.







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