HDMI siginar daidaitaccen sigina ce da ake amfani da ita a cikin tarin kayan masarufi.HDMI tana tsaye don Interface Multimedia High-Definition.HDMI mizanin mallakar mallaka ne da ake nufi don aika sigina masu zuwa daga tushe, kamar kyamara, na'urar Blu-ray, ko na'urar wasan bidiyo, zuwa makoma, kamar na'urar saka idanu.Kai tsaye yana maye gurbin tsofaffin ma'auni na analog kamar su composite da S-Video.An fara gabatar da HDMI ga kasuwar mabukaci a cikin 2004. A cikin shekaru da yawa, an sami sabbin nau'ikan HDMI da yawa, duk suna amfani da mai haɗawa iri ɗaya.A halin yanzu, sabuwar sigar ita ce 2.1, mai dacewa da ƙudurin 4K da 8K da bandwidth har zuwa 42,6 Gbit/s.
HDMI an yi niyya da farko azaman madaidaicin mabukaci, yayin da aka sanya SDI azaman ma'aunin masana'antu.Saboda wannan, HDMI na asali baya goyan bayan tsayin kebul na dogon lokaci, musamman lokacin da ƙudurin ya wuce 1080p.SDI na iya gudu har zuwa 100m a tsayin kebul a cikin 1080p50/60 (3 Gbit/s), yayin da HDMI na iya shimfiɗa zuwa iyakar 15m a cikin bandwidth iri ɗaya.Akwai hanyoyi da yawa na tsawaita HDMI fiye da waccan 15m.A cikin wannan labarin, za mu yi magana game da hanyoyin da aka fi amfani da su na ƙaddamar da siginar HDMI.
Ingancin Kebul
Idan ka wuce mita 10, siginar ta fara rasa ingancinta.Kuna iya gano wannan cikin sauƙi saboda siginar bata isa wurin allon da aka nufa ba ko kayan tarihi a cikin siginar da ke sa ba a iya ganin siginar.HDMI tana amfani da fasaha da ake kira TMDS, ko siginar rangwame-ƙananan canji, don tabbatar da jerin bayanan sun zo cikin tsari.Mai watsawa ya haɗa da ingantaccen codeing algorithm wanda ke rage tsangwama na lantarki akan igiyoyin jan ƙarfe kuma yana ba da damar dawo da agogo mai ƙarfi a mai karɓar don cimma babban juriyar juzu'i don tuƙi dogayen igiyoyi da guntu masu rahusa.
Don isa tsayin igiyoyi har zuwa 15m, kuna buƙatar igiyoyi masu inganci.Kar ka bari mai siye ya yaudare ka don siyan igiyoyin mabukaci mafi tsada a wajen domin galibin lokuta iri daya ne da na masu rahusa.Tunda HDMI cikakkiyar sigina ce ta dijital, babu wata hanya ta sigina don zama mafi ƙarancin inganci fiye da kowace na USB.Abinda ke faruwa shine sauke sigina lokacin aika manyan sigina na bandwidth akan kebul mai tsayi da yawa ko kebul ɗin da ba a ƙididdige shi don takamaiman ma'aunin HDMI ba.
Idan kuna son isa 15m tare da kebul na yau da kullun, da fatan za a tabbatar cewa kebul ɗin da kuke amfani da shi yana da ƙimar HDMI 2.1.Saboda TMDS, siginar za ta zo daidai da kyau ko kuma ba ta isa ba kwata-kwata.Siginar HDMI da ba daidai ba za ta sami takamaiman matsayi a kanta, wanda ake kira sparkles.Waɗannan kyalkyali pixels ne waɗanda ba a juya su cikin siginar da ta dace kuma an nuna su da fari.Wannan nau'i na kuskuren sigina ba kasafai ba ne, kuma zai fi haifar da baƙar allo, babu sigina kwata-kwata.
Ƙara HDMI
An karɓi HDMI cikin sauri azaman babban haɗin gwiwa don jigilar bidiyo da sauti a cikin kowane nau'in samfuran mabukaci.Saboda HDMI kuma yana jigilar sauti, da sauri ya zama ma'auni don majigi da manyan allo a cikin ɗakunan taro.Kuma saboda DSLRs da kyamarorin-mabukaci suma suna da musaya na HDMI, ƙwararrun mafita na bidiyo sun sami HDMI suma.Tun da yake an yarda da shi sosai azaman dubawa kuma ana samunsa akan kyawawan kowane panel LCD na mabukaci, yana da ƙarin farashi-tasiri don amfani da shi a cikin shigarwar bidiyo.A cikin shigarwar bidiyo, masu amfani sun ci karo da matsalar cewa matsakaicin tsayin kebul zai iya zama 15m kawai.Akwai hanyoyi da yawa na shawo kan wannan matsala:
Maida HDMI zuwa SDI kuma baya
Lokacin da kuka juyar da siginar HDMI zuwa SDI kuma baya a wurin da aka nufa, kuna haɓaka siginar yadda yakamata har zuwa 130m.Wannan hanyar ta yi amfani da matsakaicin tsayin kebul a gefen watsawa, wanda aka canza zuwa SDI, yayi amfani da cikakken tsayin kebul na 100m, kuma ya koma baya bayan amfani da kebul na HDMI mai cikakken tsayi kuma.Wannan hanyar tana buƙatar kebul na SDI mai inganci da masu canzawa guda biyu kuma ba a fi so ba saboda farashi.
+ SDI fasaha ce mai ƙarfi sosai
+ Yana goyan bayan har zuwa 130m da ƙari yayin amfani da makullin ja
- SDI a cikin babban inganci don bidiyon 4K ba shi da tsada sosai
- Masu canza aiki na iya zama tsada
Juya zuwa HDBaseT kuma baya
Lokacin da kuka canza siginar HDMI zuwa HDBaseT, kuma baya za ku iya isa tsayin kebul mai tsayi akan CAT-6 mai tsada sosai ko mafi kyawun kebul.Matsakaicin matsakaicin tsayi ya bambanta akan kayan aikin da kuke amfani da su, amma galibin lokaci, 50m+ yana yiwuwa sosai.HDBaseT kuma na iya aika wuta zuwa na'urarka don kada ya buƙaci wutar gida a gefe ɗaya.Hakanan, wannan ya dogara da kayan aikin da aka yi amfani da su.
+ HDBaseT fasaha ce mai ƙarfi sosai tare da goyan bayan ƙudurin har zuwa 4K
+ HDBaseT yana amfani da igiyoyi masu tsada sosai a cikin hanyar CAT-6 ethernet na USB
- Masu haɗin kebul na Ethernet (RJ-45) na iya zama mara ƙarfi
- Matsakaicin tsayin kebul dangane da kayan aikin da aka yi amfani da su
Yi amfani da igiyoyi na HDMI Active
Abubuwan igiyoyi na HDMI masu aiki sune igiyoyi waɗanda ke da ginanniyar juyawa daga jan ƙarfe na yau da kullun zuwa fiber na gani.Ta wannan hanyar, ainihin kebul ɗin shine fiber na gani na fata a cikin rufin roba.Irin wannan kebul ɗin yana da kyau idan kuna buƙatar shigar da shi a cikin ƙayyadaddun shigarwa, kamar ginin ofis.Kebul ɗin yana da rauni kuma ba za a iya lankwasa shi a kan wani radius ba, kuma bai kamata a taka shi ko a tuƙa shi da keken keke ba.Irin wannan tsawo yana da tsada mai nisa amma abin dogara sosai.A wasu lokuta, ɗayan ƙarshen kebul ɗin baya yin ƙarfi saboda na'urar ba ta fitar da ƙarfin lantarki da ake buƙata don masu juyawa.Wadannan mafita suna tafiya har zuwa mita 100 tare da sauƙi.
+ Kebul na HDMI masu aiki na asali suna tallafawa manyan ƙuduri har zuwa 4K
+ Magani mai rauni da tsayi mai tsayi don ƙayyadaddun shigarwa
- Kebul na fiber na gani yana da rauni don lankwasawa da murkushewa
- Ba duk nuni ko masu watsawa ke fitar da ingantaccen ƙarfin lantarki na kebul ba
Yi amfani da Active HDMI Extenders
Masu fa'ida na HDMI masu aiki hanya ce mai kyau ta tsawaita siginar da inganci.Kowane mai tsawo yana ƙara wani 15m zuwa matsakaicin tsayi.Waɗannan na'urorin ba su da tsada sosai ko rikitarwa don amfani.Wannan zai zama hanyar da aka fi so idan kuna buƙatar igiyoyi masu matsakaicin tsayi a cikin ƙayyadaddun shigarwa, kamar OB Van ko kebul da ke kan silin zuwa majigi.Waɗannan masu haɓakawa suna buƙatar ƙarfin gida ko na baturi kuma basu dace da shigarwar da ke buƙatar zama ta hannu ba.
+ Magani mai inganci
+ Za a iya amfani da igiyoyin da aka riga aka samu
- Yana buƙatar ƙarfin gida ko baturi kowane tsayin kebul
- Bai dace da tafiyar USB mai tsayi ko shigarwa ta hannu ba
Lokacin aikawa: Afrilu-19-2022