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Text of the page (random words):
andard countries t dmb mobile handheld hd dmb s dmb satellite codecs video h 266 mpeg i part 3 vvc h 265 mpeg h hevc h 264 mpeg 4 avc mpeg 4 part 2 h 262 mpeg 2 part 2 vc 1 avs3 avs3 p2 avs2 avs avs1 p16 avs avs1 p2 audio mpeg h av3a avs3 p3 he aac aac ac 4 e ac 3 ac 3 dra mp3 mp2 terrestrial frequency bands vhf uhf shf satellite frequency bands s band c band ku band ka band v t e digital multimedia broadcasting dmb is a digital radio transmission technology developed in south korea 1 2 3 as part of the national it project for sending multimedia such as tv radio and datacasting to mobile devices such as mobile phones laptops and gps navigation systems this technology sometimes known as mobile tv should not be confused with digital audio broadcasting dab which was developed as a research project for the european union dmb was developed in south korea as the next generation digital technology to replace fm radio 4 but the technological foundations were laid by prof dr gert siegle and dr hamed amor at bosch in germany 5 the world s first official mobile tv service started in south korea in may 2005 although trials were available much earlier it can operate via satellite s dmb or terrestrial t dmb transmission dmb has also some similarities with its former competing mobile tv standard dvb h 6 s dmb edit main article s dmb t dmb edit t dmb is made for terrestrial transmissions on band iii vhf and l uhf frequencies dmb is unavailable in the united states because those frequencies are allocated for television broadcasting vhf channels 7 to 13 and military applications usa is adopting atsc m h for free broadcasts to mobiles and for a time qualcomm s proprietary mediaflo system in japan 1seg is the standard using isdb t dmb uses mpeg 4 part 10 h 264 for the video and mpeg 4 part 3 bsac or he aac v2 for the audio the audio and video is encapsulated in an mpeg transport stream mpeg ts the stream is forward error corrected by reed solomon encoding and the parity word is 16 bytes long there is convolutional interleaving made on this stream then the stream is broadcast in data stream mode on dab in order to diminish the channel effects such as fading and shadowing the dmb modem uses ofdm dqpsk modulation a single chip t dmb receiver is also provided by an mpeg transport stream demultiplexer dmb has several applicable devices such as mobile phone portable tv pda and telematics devices for automobiles t dmb is an etsi standard ts 102 427 and ts 102 428 as of december 14 2007 itu formally approved t dmb as the global standard along with three other standards like dvb h 1seg and mediaflo 7 smart dmb edit smart dmb started in january 2013 in south korea smart dmb has a vod service and quality has been improved from 240p to 480p smart dmb is built in many korean smartphones starting with the galaxy grand in january 2013 8 hd dmb edit hd dmb started in august 2016 in south korea hd dmb has been improved from 240p to 720p it uses hevc 5 codec there are currently when 6 hd dmb stations in seoul smartphones integrated qualcomm snapdragon 801 or higher received firmware upgrade to support hd dmb countries using dmb edit currently dmb is being put into use in a number of countries although mainly used in south korea also see list of countries using dab dmb south korea edit in 2005 south korea became the world s first country to start s dmb and t dmb service on may 1 and december 1 respectively 9 10 in december 2006 t dmb service in south korea consists of 7 tv channels 12 radio channels and 8 data channels these are broadcast on six multiplexes in the vhf band on tv channels 8 and 12 6 mhz raster in october 2007 south korea added broadcasting channel mbcnet to the dmb channel but in 2010 this channel changed tnn go in 2009 there were eight dmb video channels in seoul and six in other metropolitan cities as of april 2013 s dmb service in south korea consists of 15 tv channels 2 radio channels and 6 data channels 11 south korea has had full t dmb services including jss jpeg slide show dls dynamic label segment bws and tpeg since 2006 s dmb service in south korea is provided on a subscription basis through tu media and is accessible throughout the country t dmb service is provided free of charge but access is limited to selected regions around one million receivers have been sold as of june 2006 update 14 million dmb receivers were sold including t dmb and s dmb in south korea and 40 of the new cell phones have the capability to see dmb 12 receivers are integrated in car navigation systems mobile phones portable media players laptop computers and digital cameras in mid august 2007 iriver a multimedia and micro technology company released their nv which utilizes south korea s dmb service since the advent of smartphones dmbs have been made available on phones with receivers through smartphone applications most of which come pre installed in phones made and sold in south korea other countries edit this article needs to be updated the reason given is dmb outside korea and dvb h are dead and in all other standards there s been heavy movement in since 2008 which seems to be the state of the section please help update this article to reflect recent events or newly available information august 2024 some t dmb trials are currently available or planned around europe and other countries in norway t dmb services was made available between may 2009 and january 2018 minitv dmb service launched by the norwegian mobile tv corporation nmtv and was backed by the three largest broadcasters in norway the public broadcaster nrk tv2 and modern times group mtg the live channels were available in and around greater oslo 13 14 germany s mobiles fernsehen deutschland mfd launched the commercial t dmb service watcha in june 2006 in time for the world cup 2006 marketed together with samsung s p900 dmb phone the first dmb phone in europe it was stopped in april 2008 as mfd is now favouring dvb h the european standard 15 france in december 2007 chose t dmb audio in vhf band iii and l band as the national standard for terrestrial digital radio 16 it was replaced later by dab 17 china in 2006 chose dab as an industrial standard since 2007 dab and t dmb services broadcast in beijing guangdong henan dalian yunnan liaoning hunan zhejiang anhui and shenzhen 18 in mexico most cell phone carriers offer dmb broadcasting as part of their basic plans as of 2008 the vast majority of mexico receives dmb signals ghana is running a t dmb service in accra and kumasi on mobile network since may 2008 19 netherlands mfd t systems and private investors are planning a dmb service under the name mobiel tv nederland callmax will also deploy a dmb service on the l band frequency in the netherlands 20 indonesia is currently running a trial in jakarta italy and vatican city rai 21 and vatican radio 22 are currently running a trial some areas canada has been running trials since 2006 in ottawa toronto vancouver and montreal done by cbc radio canada 23 malaysia has been running trials since 2008 in kl done by tv3 mpb initially the government was committed to deploying dvb t for government owned channels however as of december 2009 rtm1 and 2 as well as all the radio channels are available over band iii for dmb t as in addition to dvb t additionally the tv3 dmb signal has moved to l band the tv3 dmb signals are still limited to the damansara and kuala lumpur area while the government owned dmb t signals have a wider coverage and apparently covers most of the klang valley area the government transmissions are part of a two year trial that is part of a test that also involves the dab and dab digital radio standard cambodia in august 2010 chose t dmb as the national standard for terrestrial digital broadcasting tvk is currently running a trial 24 dmb in automobiles edit see also software defined radio and car audio t dmb works flawlessly in vehicles traveling up to 300 km h citation needed in tunnels or underground areas both television and radio broadcast is still available though dmb may skip occasionally in south korea some long distance buses adopted t dmb instead of satellite tv such as sky tv it works quite well even though the resolution is 240p lower than satellite in comparison satellite is usually 480p or higher citation needed see also edit 1seg china multimedia mobile broadcasting cmmb digital audio broadcasting dab digital radio mondiale drm digital video broadcasting dvb etsi satellite digital radio sdr fmextra handheld projector internet radio device international journal of digital multimedia broadcasting multimedia broadcast multicast service satellite radio satellite television wibro wimax worlddmb dvb h references edit korea s terrestrial dmb germany to begin broadcast this may zdnet korea retrieved 2010 06 17 picturephoning com dmb textually org archived from the original on 2010 08 09 retrieved 2010 06 17 south korea social media 답변 내용 악어새 리포트월드 reportworld co kr archived from the original on 2009 08 17 retrieved 2010 06 17 the introduction of dmb in korea pdf ericemoon googlepages com archived from the original pdf on 2009 03 26 retrieved 2010 06 17 sichere bewegtbildübertragung zum mobilen teilnehmer deutscher zukunftspreis de 1998 archived from the original on 2013 06 28 retrieved 2019 11 27 t dmb eng t dmb org archived from the original on 2010 02 13 retrieved 2010 06 17 itu approves mobile tv standards the korea times 16 december 2007 retrieved 2010 06 17 smart dmb starting with samsung phones 아이뉴스24 inews 24 20 january 2013 retrieved 2013 01 20 asiamedia korea cell phone based broadcasting starts asiamedia ucla edu archived from the original on 2011 09 28 retrieved 2010 06 17 asiamedia korea kbs to start terrestrial mobile television services next month asiamedia ucla edu 2005 11 22 archived from the original on 2010 07 21 retrieved 2010 06 17 south korea worlddmb archived from the original on 10 july 2017 retrieved 12 july 2015 dmb users shout in the metro coming home daily economics norway launches mobile tv via dmb broadbandtvnews com 2009 05 18 retrieved 2010 06 17 dab ensembles worldwide norway wohnort org retrieved 2023 04 11 broadband tv news mfd hands back german t dmb licence may 1 2008 country information for dab dab and dmb france worlddmb worlddab org 2008 01 18 archived from the original on 2010 06 25 retrieved 2010 06 17 worlddab country information france archived 2015 02 20 at the wayback machine worlddab org on 2017 06 14 country information for dab dab and dmb china worlddmb worlddab org archived from the original on 2010 08 15 retrieved 2010 06 17 country information for dab dab and dmb ghana worlddmb worlddab org archived from the original on 2011 07 22 retrieved 2010 06 17 emerce digitale omroep gaat concurrentie aan met kpn mobieltv februari 12 2009 raiway raiway archived from the original on 2011 07 22 retrieved 2010 06 17 webteam web tv and t dmb programmes vatican radio archived from the original on 2010 03 07 retrieved 2010 06 17 cbc radio canada conducts field trials with mobile broadcast multimedia 박 창욱 캄보디아 韓 지상파dmb 국가표준 채택 n news naver com external links edit mobile multimedia broadcasting standards technology and practice ed fa long luo springer 2008 v t e video formats television analog 405 lines system a 525 lines system m color systems ntsc ntsc j clear vision pal m b mac 625 lines system b c d g h i k l n color systems pal pal n palplus secam mac 819 lines system e f 1125 lines muse 1250 lines hd mac audio btsc mts eiaj nicam sap sound in syncs zweikanalton a2 igr hidden signals captioning cgms a epg gcr pdc teletext vbi veil vit vitc wss xds historical pre 1940 mechanical television 180 line 343 line 375 line 441 line 455 line 567 line field sequential color system oskm digital interlaced sdtv 480i 576i hdtv 1080i progressive ldtv 1seg 240p 288p edtv 480p 576p hdtv 720p 1080p uhdtv 4k 8k mpeg 2 video atsc dvb dvb 3d tv isdb dtmb abs s avs cmmb avs note 1 dtmb abs s mpeg 4 visual mobaho note 2 mpeg 4 avc atsc a 72 cmmb dmb dtmb dvb sbtvd 1seg mobaho note 2 avs2 note 1 abs s mpeg h hevc atsc 3 0 dvb hd dmb isdb s3 dtmb audio ac 3 5 1 ac 4 dts dra mpeg 1 audio layer ii mpeg multichannel pcm lpcm aac he aac mpeg h 3d audio hidden signals afd broadcast flag captioning cpcm epg teletext 1 2 also used in china s dvb s s2 network 1 2 defunct technical issues 14 9 compromise broadcast safe digital cinema dci display motion blur mpeg transport stream reverse standards conversion standards conversion television transmitter test card video on demand video processing widescreen signaling templates analogue tv topics v t e telecommunications history beacon broadcasting cable protection system cable tv communications satellite computer network data compression audio dct image video digital media internet video online video platform social media streaming drums edholm s law electrical telegraph fax heliographs hydraulic telegraph information age information revolution internet mass media mobile phone smartphone optical telecommunication optical telegraphy pager photophone prepaid mobile phone radio radiotelephone satellite communications semaphore phryctoria semiconductor device mosfet transistor smoke signals telecommunications history telautograph telegraphy teleprinter teletype telephone history the telephone cases television digital streaming undersea telegraph line videotelephony whistled language wireless revolution pioneers nasir ahmed edwin howard armstrong mohamed m atalla john logie baird paul baran john bardeen alexander graham bell emile berliner tim berners lee francis blake jagadish chandra bose charles bourseul walter houser brattain vint cerf claude chappe yogen dalal donald davies daniel davis jr amos dolbear thomas edison philo farnsworth reginald fessenden lee de forest elisha gray oliver heaviside robert hooke erna schneider hoover harold hopkins gardiner greene hubbard bob kahn dawon kahng charles k kao narinder singh kapany hedy lamarr roberto landell innocenzo manzetti guglielmo marconi robert metcalfe antonio meucci samuel morse jun ichi nishizawa charles grafton page radia perlman alexander stepanovich popov tivadar puskás johann philipp reis claude shannon almon brown strowger henry sutton charles sumner tainter nikola tesla camille tissot alfred vail thomas a watson charles wheatstone vladimir k zworykin internet pioneers transmission media coaxial cable fiber optic communication optical fiber free space optical communication internet molecular communication radio waves wireless transmission line telecommunication circuit network topology and switching bandwidth links network switching circuit packet list nodes terminal telephone exchange multiplexing space division frequency division time division polarization division orbital angular momentum code division concepts communication protocol computer network data transmission store and forward telecommunications equipment types of network cellular network ethernet isdn lan mobile...
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