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rtened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia media transmission technology developed by qualcomm flo tv logo mediaflo was a technology developed by qualcomm for transmitting audio video and data to portable devices such as mobile phones and personal televisions used for mobile television qualcomm operated a mobile pay television service flo tv from 2007 to 2011 using this technology broadcast data transmitted via mediaflo includes live real time audio and video streams as well as scheduled video and audio clips and shows the technology could also carry internet protocol datacast application data such as stock market quotes sports scores and weather reports 1 in october 2010 qualcomm announced it was suspending new sales of the service to consumers 2 3 in december 2010 at t announced that it will purchase qualcomm s fcc licenses in the 700 mhz band 4 flo tv discontinued service on march 27 2011 history edit devices featuring mediaflo were introduced by lg and samsung at the 2006 consumer electronics show on december 1 2005 verizon wireless and qualcomm announced a partnership for the launch of the mediaflo network citation needed commercial rollout edit mediaflo based pay tv services were first commercially offered on mobile phones the service debuted on verizon wireless as v cast mobile tv in select cities on march 1 2007 5 6 and rolled out nationwide throughout 2007 and 2008 7 at t announced a similar service in february 2007 intended to launch later that year following delays at t s mediaflo tv service launched on may 4 2008 8 9 10 qualcomm began selling flo tv directly to consumers in november 2009 with the launch of the flo tv personal television 11 12 13 the personal television was manufactured by htc 14 and featured a 3 5 touchscreen it retailed for us 249 at launch and included a six month flo tv subscription after the trial a us 15 monthly subscription fee was required to use the service 15 later in august 2010 audiovox introduced a flo tv equipped portable dvd player which retailed for us 199 16 17 from 2009 to 2010 audiovox produced flo tv systems for automobiles 18 19 the automotive flo tv system was introduced by chrysler in december 2009 as a mopar dealer installed accessory on 2010 model vehicles equipped with the video entertainment system 20 chrysler also offered the flo tv tuner as an aftermarket upgrade for 2008 and 2009 model vehicles sold with the system 21 audiovox under its advent brand began selling third party automotive flo tv systems through aftermarket equipment dealers in february 2010 18 19 flo tv competed with sirius backseat tv 22 discontinuation edit in july 2010 qualcomm ceo paul jacobs stated that the company was suffering financial losses operating flo tv 23 and planned to either sell mediaflo or find a partner to continue its operation 24 the company reportedly discussed possible collaboration with software developers on other uses of the mediaflo spectrum which they stated could include distribution of electronic magazines or newspapers citation needed the company had predicted the total cost to launch the service would be 800 million citation needed including the 683 million that qualcomm reportedly paid for the spectrum 25 qualcomm suspended sales of flo tv to new customers on october 5 2010 but stated that the service would remain available to existing customers through the spring of 2011 26 on october 12 qualcomm stated that flo tv would shut down on march 27 2011 27 qualcomm offered rebates to customers who purchased a flo tv equipped dvd player or personal television which could be claimed until april 30 2011 27 chrysler also announced plans to reimburse customers who purchased a flo tv system though the system was reportedly only purchased by 851 chrysler customers 22 on december 20 2010 at t announced that it would purchase qualcomm s fcc licenses in the 700 mhz band for 1 93 billion 25 28 despite spending 132 million in the previous quarter on bolstering flo tv qualcomm still made a profit on the sale as it had originally paid 38 million for the former channel 55 and 558 million for the former channel 56 28 international trials edit some trials were underway in japan hong kong and taiwan with no commitment for a commercial release citation needed in france qualcomm tried unsuccessfully to convince tdf to adopt mediaflo technology citation needed in the uk british sky broadcasting conducted trials of mediaflo in 2006 citation needed programming edit all u s mediaflo providers offered a set of 14 basic channels 2 flo 6 a m to 10 p m original made for mobile reports and concerts added in early 2010 adult swim 10 p m to 6 a m abc mobile cbs mobile containing a mixture of sports and other cbs content cnbc comedy central espn mobile tv frequently simulcasting live sporting events from their family of networks fox mobile fox news channel mtv mobile msnbc nbc 2go featuring a mix of programs from the nbc msnbc cnbc and bravo networks 29 disney channel nickelodeon adult swim time shared with 2 flo as it does on cable tv with cartoon network citation needed additionally the flo preview channel was a free to view barker channel available without subscription 30 verizon offered those 14 channels plus mtv tres and tlc 31 at t personal television and automotive systems offered the base 14 plus cnn live mobile and crackle citation needed technology edit mediaflo logo the flo in mediaflo stood for forward link only 32 meaning that the data transmission path is one way from the tower to the device the mediaflo system transmitted data on a frequency separate from the frequencies used by current mobile telephone networks in the united states the mediaflo system used frequency spectrum 716 722 mhz which had previously been allocated to uhf tv channel 55 01nov2004 qualcomm press release regarding 700 mhz spectrum usage for mediaflo 33 flo was standardized within etsi as ts 102 589 34 and has components standardized within the telecommunications industry association tia 1099 1102 1103 1104 1120 1130 1132 1146 and 1178 mediaflo was a competitor to the korean t dmb the japanese 1seg and the european dvb h standards qualcomm conducted mediaflo technical trials internationally with the intention of forming partnerships with existing multi channel content providers and service operators but has since discontinued development the protocol was developed because of the inherent spectral inefficiency of unicasting high rate full motion video to multiple subscribers additionally traditional analog television and over the air terrestrial digital television signals dvb t were difficult to implement on mobile devices due mostly to issues of power consumption atsc used only by the united states and its neighbors also has difficulty even with fixed reception due to multipath and mobile atsc m h which is free to air from individual tv stations was not finalized until 2008 in addition the transmission need not convey as high a resolution as would be needed for a larger display mediaflo streams are only 200 250 kbit s which would be insufficient for a larger screen size 35 in the now defunct united states implementation flo was transmitted by a network of high power broadcast transmitters operating at effective radiated powers as high as 50 kilowatts this allowed for a coverage area of a transmitter to be as large as 30 to 40 kilometres 19 to 25 mi 36 the activation of many of these transmitters were delayed due to the official end of analog tv broadcasting on channel 55 being delayed 37 immediately following the transition the flo network was expanded to several new markets and coverage was enhanced in some existing ones 38 the transmission was an encrypted ofdm set of qam signals sent on a 5 55 mhz channel from 716 to 722 mhz former uhf tv channel 55 the band was auctioned off by the federal communications commission fcc and known as the lower 700 mhz block d 39 qualcomm also bought in a later auction the use of former analog uhf tv channel 56 722 728 mhz in boston los angeles new york philadelphia and san francisco for additional services however this is owned by manifest wireless a subsidiary of dish network s frontier wireless in most other media markets where atsc m h signals were on air all of the transmitters sent the same signal and used the same frequency forming a single frequency network this allowed the mobile to decode the signal from more than one transmitter in the same way that it might if it was a multipath delayed version from the same transmitter 36 all stations used callsign wpza237 but each has an identifier indicating its group and number for example one station in the metro atlanta media market was atl 006 while another was atl 014 some other operational parameters of mediaflo are as follows parameter value total number of qam sub carriers 4 096 number of guard sub carriers 96 number of pilot sub carriers 500 multicast logical channels mlc 1 7 modulations used qpsk 4 symbol constellations 16qam 16 symbols spacing between sub carriers 1 355 khz 5 55 mhz 4 096 sub carriers modulated symbol chip duration 0 18 μs 1 5 55 mhz 36 all of the bearer data traffic occurred within an mlc using the 3500 non overhead subcarriers the protocol also contemplates a certain amount of inter symbol time spacing to allow for the effects of multi path transmission and reception parameter value total ofdm symbol interval t s 833 33 μs bearer data traffic t u 738 02 μs window interval t wgi 3 06 μs cyclic prefix t fgi 92 25 μs 36 there is a window time t wgi included both before and after each ofdm symbol however since this window is shared between each two consecutive symbols t s t u t wgi t fgi for conditional access verizon wireless utilized its evdo network to authenticate mobile handsets and provide the decryption keys necessary to decode the programming because of this users who block data use to prevent unauthorized charge were also blocked from viewing any channels including the preview channel citation needed see also edit mobile tv a term for the category of techniques dvb h digital video broadcasting handheld dvb digital video broadcasting dmb digital multimedia broadcasting dab digital audio broadcasting drm digital radio mondiale 1seg mobile tv system on isdb t isdb tmm t errestrial m obile m ulti media electronic program guide references edit qualcomm press release on live datacasting 05apr2006 qualcomm suspends flo tv sales reuters 2010 10 05 flo tv doomed by easier free alternatives archived 2010 10 07 at the wayback machine mediapost oct 5 2010 at t to buy qualcomm s spectrum licenses for 1 93 billion reuters 2010 12 20 verizon wireless to launch v cast tv march 1 cnet retrieved 2025 05 19 wilson jeffrey 2007 02 28 verizon v cast mobile tv launching tomorrow laptop mag archived from the original on 2007 09 25 verizon v cast mobile tv pc magazine retrieved 2025 05 19 at t s mediaflo tv service launch delayed to 2008 reuters 2007 10 25 at t plans mediaflo mobile tv service nbc news 2008 03 27 retrieved 2025 05 19 at t mobile tv pc magazine retrieved 2025 05 19 hansell saul 2009 06 24 the price goes down for flo tv bits blog retrieved 2025 05 19 san miguel renay 2009 10 07 qualcomm s flo tv gets a handheld all its own technewsworld retrieved 2025 05 19 grotticelli michael 2009 10 12 flo tv unveils subscription based personal television tv tech retrieved 2025 05 19 dipert brian 2016 03 18 teardown flo tv didn t fail because of its hardware edn retrieved 2025 05 19 flo tv personal television pc magazine retrieved 2025 05 19 audiovox rolls out flo tv equipped dfl01 portable dvd player engadget 2010 08 07 retrieved 2025 05 19 mcglaun shane 2010 08 11 audiovox dfl 710 portable dvd player w flo tv now available geeky gadgets retrieved 2025 05 19 1 2 murph darren 2010 02 15 flo tv storms automotive lots flo ev gets launched and flo smartbook apps surface engadget retrieved 2025 05 19 1 2 quain john r 2010 02 19 television that streams even if traffic doesn t the new york times issn 0362 4331 retrieved 2025 05 19 szczesny joseph 2010 03 19 chrysler to offer tv in some vehicles the oakland press retrieved 2025 05 19 harley michael 2009 11 04 chrysler gets in car tv going with flo tv www autoblog com retrieved 2025 05 19 1 2 constant brad 2010 10 14 flo tv shutdown forces chrysler to consider alternatives autoweek flatley joseph l 2010 07 22 flo tv losing money qualcomm looking for an out engadget retrieved 2025 05 19 hachman mark july 22 2010 qualcomm in talks to sell mediaflo mobile dtv biz pc magazine 1 2 ray bill 2010 12 22 qualcomm turns a pretty penny on flo spectrum the register flo tv killing direct to consumer programming in spring 2011 will make necessary refunds 1 2 murph darren 2010 12 09 flo tv rebates for devices and service are now live engadget retrieved 2025 05 19 1 2 at t buys 2 billion worth of 4g spectrum from qualcomm news record associated press 2010 12 20 retrieved 2010 12 20 channels flo tv view online program guide archived 2009 02 10 at the wayback machine mediaflo usa on air now archived 2007 12 09 at the wayback machine origins of flo name main page flo forum website archived from the original on 2012 06 03 retrieved 2012 06 11 dailywireless org http www dailywireless org 2007 01 07 verizon launching mediaflo etsi ts 102 589 forward link only air interface specification for terrestrial mobile multimedia multicast v1 1 1 2009 02 http www etsi org deliver etsi_ts 102500_102599 102589 01 01 01_60 ts_102589v010101p pdf ieee transactions on broadcasting vol 53 no 1 march 2007 1 2 3 4 ieee transactions on broadcasting vol 53 no 1 march 2007 http www qualcomm com common documents articles flo_physical_layer_ieee pdf permanent dead link dtv transition delay what it means for you pdf archived from the original pdf on 25 march 2009 flo tv goes national expands live mobile tv service as dtv transition frees broadband spectrum flo tv retrieved 2010 10 04 http wireless fcc gov auctions default htm job auction_summary id 60 fcc auction 60 external links edit flo tv home page rabbitears info mediaflo transmitter list retrieved from https en wikipedia org w index php title mediaflo oldid 1378299693 categories mobile television qualcomm products introduced in 2007 2007 establishments in the united states products and services discontinued in 2011 2011 disestablishments in the united states hidden categories articles with short description short description matches wikidata webarchive template wayback links all articles with unsourced statements articles with unsourced statements from may 2025 all articles with dead external links articles with dead external links from june 2017 articles with permanently dead external links this page was last edited on 3 october 2026 at 21 50 utc page was rendered with parsoid text is available 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