Miracast - abin da yake da shi? Wireless watsa kafofin watsa labarai siginar

High quality-mara waya multimedia sigina daga kwakwalwa zuwa wasu devaysa na'urar (TV, majigi, da streaming player, da dai sauransu ...) - wannan shi ne daidai da abin da yake a baya Miracast lokaci. Wannan fasaha ne a istinbadi kasuwar dauki ga "rufaffiyar" ilimi kayayyakin Apple da Intel, cewa shi ne, shi gada da ka'idodinta AirPlay da WiDi, amma shi ne batun da dan kadan daban-daban aikin lissafi mai tsauri. A matsayin tushen da misali dauka damar Wi-Fi Direct. Saboda haka, hanyar bayanai daga kafofin watsa labarai renderer da za a iyakance zuwa maki biyu. Na'ura mai ba da hanya tsakanin hanyoyin sadarwa-matsakanci a kan aiwatar da translation ba da hannu - aikawa da karɓa suna da alaka kai tsaye.

Miracast. Mene ne wannan mu'ujiza?

The m dama ga alamar kasuwanci ce (da cikakken suna daga cikin iri - Wi-Fi Certified Miracast) jam'iyya yana da Wi-Fi Alliance. Duk da haka, wani na musamman tambura ko abbreviations ga lakabtawa na kayayyakin da goyon bayan fasahar ba ya wanzu. The rubutu «WiFi Miracast» mafi yawa ana amfani a kan wani na'ura, haƙĩƙa, sun shige cikin takardar shaida hanya daidai da bukatun na Nuni gwajin shirin.

Babban burin da aka tsara kamar haka :. "Don a tabbatar da fitarwa daga kafofin watsa labarai abun ciki daga PC duba ko mobile na'urar nuni a kan babban allon ba tare da yin amfani da wayoyi da kuma waje networks" Tare da musamman girmamawa a kan ingancin da aka karža.

Yau kowane mai amfani ne "mai kaifin" devaysa (bayar cewa OS support Miracast standard) zai iya aiki tare da su na'urar da wani TV / majigi da kuma aiki tare da sikelin image ba tare da shigarwa na ƙarin software.

baseline halaye

Da muhimman hakkokin tushen fasahar - wani aikin Algorithms Wi-Fi Direct: Miracast-adaftan da cewa matosai cikin HDMI tashar jiragen ruwa-conjugate naúrar (idan bayar da "baƙin ƙarfe" ciki tsari), a maimakon wani bangare na cibiyar sadarwa na gida da kuma gina wata gada da dakatar da watsa. Bugu da ƙari, ITU-T H.264 format alama nan da aka ba ka gani ba a matsayin hanyar musanya fayiloli, kuma a matsayin inji for shari kafofin watsa labarai fakitoci kwantena (da jadawalin da aka aiko da kuma karbi a cikin irin yadda shi ne).

A lokacin gabatar Miracast (shi faru daidai a watan Satumba 2012 - shi ne wani hatsari: a kasa da 2 watanni da fasahar da aka soma da sabunta Android tsarin aiki da kuma, daidai da, an amfani ba kawai a cikin Google ta kayayyakin), akwai fiye da hamsin na goyan bayan shawarwari: 17 - CEA, 29 - VESA, 12 - da ake kira tarho. Daga cikin recognizable sauti matsayin - biyu-tashar LPCM, «na sitiriyo 5.1» AC3 da ACC.

Don ƙarin bayani game da gamuwa tsari

Mataki-mataki kunnawa Miracast zabin (shi ne mai yiwuwa riga share) ya shafi dama matakai. Dole ne mu yi aiki a irin wannan hanya:

1. Kunna da PC / Smartphone / "hannu".
2. Kunna mai karɓar 'data (ko TV allo don gabatarwa).
3. Sanya biyu na'urorin m zuwa saiti shirin.

Zabi da gudu takamaiman fayil a kwafin yanayin, da nuni allo a duba kafofin watsa labarai karɓa.

Matsakanci na'ura mai ba da hanya tsakanin hanyoyin sadarwa a cikin irin wannan "tattaunawa" ba shiga: biyu na'urorin samar da wata kai tsaye kafaffen tashar a kan wanda baya faruwa a watsa shirye-shirye. A sauki sharuddan, Miracast (yana da fasaha shugabanci a matsayin wani nau'i na aiki tare da photo da bidiyo bayanai za su zama suna fiye da na gargajiya HDMI-ƙofa, shi ne a yanzu, ba shakka) ne wani gine gina a kan saman Wi-Fi Direct daga baya versions (3.50 da kuma sama). Amfani da H.264 video matsawa damar sake ainihin kwafin bayanan abubuwa a wani atypical visualizer, ciki har da a kan aikin allo.

Amfanin cewa ya ji ta kowane

Ko an saba amfani ba tare da tunani da zai kira dalilai da dama da bukatar Miracast. Da fari dai, muna magana ne game da aiki ta'aziyya: bayyane ga juna "a kan iska", tare da katin shaida na faruwa a cikin wani al'amari na seconds, da kuma hulda - ba tare da shamaki ba (ba za mu saya a haɗa waya). Abu na biyu, m-Miracast adaftan da aka sarrafa kansa don haka da cewa tilas gyara ga wani musamman model na na'urar ba ya bukatar - dongle aikawa / mai karɓar kanta gane hoto bayanai. Bugu da kari, akwai zama goyon baya ga 3D a kan bango na da cikakken tsaro na watsa shirye-shirye ciki.

Daga cikin sauran amfanin:

• da shahararsa na bayyana sadarwa misali a cikin al'umma kera (fiye da 500 kamfanoni suna mayar da hankali a kan aiwatar da "madubi na watsa shirye-shirye");
• wani fili da bata lokaci ba, a siginar aiki (low cost model na'urori wannan mulki ya shafi ba da cikakken).
• da yiwuwar canja wurin "m" video (FullHD).
• minimization na ƙarin matakai (cire wuce kima load a kan baturi a cikin smartphone / kwamfutar hannu).

Miracast da kasawan

Abin baƙin ciki, wording "ba tare da flaws" kusan ba ya faruwa a duniya na high-m fasahar. Gaskiyar cewa yanzu version na Miracast (Android, dole ne a ce, shi ne kawai daya daga cikin mutane da yawa Tsarukan aiki da suka danganta su ƙaddara tare da wannan misali, amma a cikin kashi na mobile konkoma karãtunsa fãtun ta dominance ne ba a cikin shakka) da wata ma'ana, evidenced by:

• har yanzu rauni karfinsu (wani lokacin da matsayi na "ana tsammanin dangane ..." da aka nuna shi akan allon, amma amincewa da aiki da kuma ba zai iya samun wata ma'ana follow-up).
• goyi bayan iyakar ƙuduri a 1920x1200, yayin da girma bukatar 4K.
• da yin amfani da mallakar tajirai H.264 Codec.
• prohibitive mataki na masking kayayyakin da suke ba a kan jirgin software, da kuma "hardware" aiwatar da fasahar (babu tambura a kan marufi da kuma / ko devaysa gidaje).

Har ila yau, da yawa masu amfani ga hasara a wannan lokacin amfani da Miracast-na'urar da aka dakatar da aiki na al'ada Wi-Fi-connection. A 2-tashar adaftan, kamar yadda muka sani, ba duka suna sanye take da wayoyin salula na zamani da Allunan (gaira an lura ko da a cikin kashi na Premium ƙonawa). A karshe, masu kuzarin kawo cikas na 30 FPS da 720x480 - suna fadin rates a yau, amma rauni sarrafawa ko su wani lokacin ba su sãmi fahimtar a kan wani ɓangare na Visualizer (a kan babban allon bidiyo zo da m jerks).

Analogs kuma su na asali bambance-bambance

Tsarukan aiki da, wani m-shiryayye zuwa Miracast, - Android (tun version 4.2 Jelly Bean), Windows 8.1 (ga tebur da kuma hannu da na'urorin) da kuma Amazons wuta. Amma ga PC dangane da Linux, sa'an nan ba tare da keta cimma isasshen fitarwa a Daidaita da bokan kayayyakin za su ci nasara ba. Duk da haka, huck ne fraught tare da kasawa da kuma iya ba da tabbacin wani al'ada tattaunawa tsakanin aikawa da mai karɓa daga kafofin watsa labarai ciki. Wakilai daga cikin kewayon Apple ba su sani ba Miracast, a matsayin "incarcerated" a karkashin asali dandali fasahar AirPlay.

In mun gwada Intel WiDi za a iya ce da cewa misali dangane na dogon lokaci, da aka positioned a matsayin dukiyar da wannan sunan da kamfani da aka ba samuwa ga na'urori tare da ɓangare na uku sarrafawa. Amma tare da a saki version 3.5 ne game da canja halin.

Hanyar shawo kan matsala takwarorinsu biyu kawai - MHL da HDMI. Na bayyane da bambance-bambance ya kamata a lura na USB tushe lamba, wanda ba m lokacin da Daidaita kashi da kuma kwanciyar hankali siginar da tsauri data musayar (Miracast ma "sags", a lokacin da allon da ke faruwa mataki-scenes).

Miracast a cikin idanu na kera

Ko da yake fasahar kuma yana da wani bude tushen code, ta lissafi mai tsauri ga mara waya image canja wuri ne da farko mayar da hankali a kan m na Windows da Android. Ba abin mamaki ba cewa jerin masana'antun zuwa sama tare da sau, dama da ɗari matsayi. Gaskiya, akwai ban da m tsarin da suka shafi cikin management harsashi update. Kamar wancan ne, musamman, da aka ba da goyan bayan Miracast Windows 7 (da batun da aka ba a warware ko dai ta hakkin mallaka taro ko shigarwa na karin software).

A mafi recognizable brands, gani "cikin soyayya" ga Wi-Fi Direct da H.264:

• Qualcomm.
• MediaTek.
• AMD.
• Microsoft.
• Intel.

A kusa da nan gaba tare da Miracast matsayi

A ra'ayin na kafa HDMI mara waya ta, ba shakka, ban sha'awa. Duk da haka, da nuni a kan babbar allo bayanai daga smartphone ko kwamfutar hannu ne ba don haka da wuya. Ina troublesome - a sami mai kyau madadin ladabi SMARTs. Kuma a cikin wannan girmamawa, Miracast ne kawai ba za smoothly.

Bayan kai tsaye fafatawa a gasa - AirPlay da Chromecast - nuna hali a cikin wani lokacin yawa "mafi wayo". Alal misali, suna da damar ka ka aika abun ciki na bidiyo a kan babban allon yayin kewayawa ta cikin menu (ba tare da nuna wadannan guda bayani a cikin kwayar rafi). Biyu m nuance zo don sake kunnawa yanayin - Miracast sau da yawa taka video zuwa karshen, ba maida martani ko dai da Na'urar haska ko umurnin matsayi / motsi devaysa tushen haska (full Tasrifu yi wa'adi a cikin sabon firmware, sa'an nan "barci" smartphone san don kashe aikin allo ba tare da karin code mai amfani).

Yanzu game da daidaici da DLNA da fasaha. Miracast - a "hanya madaidaiciya: watsa shirye-shirye" live "images daga allo na na'urar a kan wani daban-daban duba ta auku ba a cikin guntu algorithm ba tare da wani ƙarin sadarwa nodes. Karkashin DLNA raguwa boyewa da dukan hade raznosortnyh nagartacce. Watau na'urorin don kafa fahimtar juna bukatar gaban "fassara" (na'ura mai ba da hanya tsakanin hanyoyin sadarwa). Kuma a sake, mahalarta Digital Living Network Alliance iya kawai aiki fayiloli, da kuma biyu "abõkinsa" Miracast aiki a kan madubi manufa ( "cewa show, to ku zarce"), da kuma a warware wasu matsaloli fasaha zai iya raba abun ciki a cikin ganiya aiki tare.

Software Miracast karfinsu: Windows-version

A kan hukuma Microsoft page ƙunshi bayani game da bukata aiki yanayi a wanda yana yiwuwa a gabatar da wani aikin sa na Miracast fasaha.

Windows 8.1 - pre-shigar ko updated tare da "bakwai bakwai" - yana nufin yawan m bukatun. Bugu da kari, sanarwar da applicability na misali da watsa shirye-shirye version RT 8.1 da daga baya OS majalisai.

kwamfuta / na'urar shiri domin mara waya ta watsa shirye-shirye media da abun ciki a kan duba

Ga na'urorin da "takwas" kan jirgin jerin ayyuka don tabbatar da watsa shirye-shirye aiwatar tafasa saukar zuwa maki biyu:

1. Aiki tare na'urorin (watsawa da karɓa) kunshe ne a cikin wata sigina ɗaukar hoto yankin.
2. Rayar "majigi" zaɓi.

Kuma akwai da dama tatsuniyoyinsu na ciki fitarwa. Hoto / bidiyo, zaka iya:

• watsa shirye-shirye a Kwafin yanayin (lokaci daya nuni 2 nuni).
• ganin kawai duba da mai karɓa na'ura;
• canja wurin da jan da ake so abubuwa daga allo zuwa allon.

Miracast da Android aiki tsarin

Mutane da yawa masana'antun yin kayayyakin lantarki na kokarin sa mafi yawan Miracast fasaha. A LG, misali, integrates da shi a cikin wayoyin salula na zamani da kuma televisions yana da shekaru da yawa. Kada wanzuwa da kuma Sony injiniyoyi, Samsung, Panasonic - duk inda akwai ne a guje Android girmi 4.2, wannan misali ne aiwatar, kamar yadda suka faɗa, to cikakkiyar.

Neman dadi watsa daga ciki ya kai ga cewa da goyon bayan da Miracast ko samu wadanda TV model wanda ya kashe taron layi har zuwa 2012. Fasaha bayani ya zama HDMI-takamaiman keys (siginar adaftan). A lokacin, da suka tsunduma a Manufacturing da dama, daban-daban kamfanoni. A sakamakon haka, kayayyakin zuwa ga kasuwar, da kuma tsanani da ya bambanta a farashin da kuma inganci. Haka kuma, wurin ya zama da aikin rashin daidaituwa: daya adafta don ikon gina "gadoji" a cikin Miracast misali, da sauran ba kudin wani abu a sami "manufa" tare da Apple devaysa ko kafa "tattaunawa" a kan DLNA. Shi ya sa a gaban sayen haka muhimmanci yana duba da thematic forums da kuma ziyarci hukuma shafukan da masana'antun.

An bayyani daga cikin rare dongle

a kan Miracast Dongle farashin bambanta a cikin kewayon 30-100 cu. Bayan sayan da shigarwa na adaftan kusan duk wani TV sanye take da HDMI-tashar jiragen ruwa, za a iya haɗa na'urar wayaba. Muna magana ne game da wani kai tsaye, dangane da damar da za ka yi wasa "m" video a 1920x1200 format.

Dongle Mocreo (.. 30-35 cu) - tabbacin goyon bayan uku ladabi: Miracast, AirPlay da DLNA.

"Kunamu" alama Pythons (70-80 a. E.), Yawanci gane wannan matsayin a matsayin Mocreo.

Adaftan GeekBuying (50-60 cu ..) - samar da madubi watsa shirye-shirye a kan lissafi mai tsauri Miracast da DNLA.

Bugu da kari, akwai kasuwanci, akwai kuma asali dongle Wi-Fi Certified Miracast, honed karkashin daya irin sigina.