Fifia la, cable kple satellite TV dɔwɔƒe akpa gãtɔ zãa MPEG2 ƒe dzidzenu tsɔ ɖoa woƒe dzesiwo ɖe amewo. Dukɔwo Dome Habɔbɔ si Kpɔa Dzidzenuwo Gbɔ ƒe Nɔnɔmetata Siwo Ʋuʋuna Ŋuti Nunyalawo ƒe Ƒuƒoƒoe to MPEG2 ƒe dzidzenua vɛ. Wota MPEG2 abe dukɔwo dome dzidzenu ISO/IEC 13818. Ðeko dzidzenu sia ɖɔa gɔmeɖose siwo katã ku ɖe nutete ŋu, eye wògblẽa nyatakakawo ɖe encoder wɔlawo si me.
Wotu compression algorithm la ɖe nɔnɔme siwo amegbetɔ bua nɔnɔmetata lae dzi. Le kpɔɖeŋu me, amegbetɔ ƒe ŋku kpɔa keklẽ ƒe vivisese nyuie wu amadede sã; wobua amadede aɖewo ƒe gradations nyuie wu, bubuwo - vɔ̃ɖi wu.
Tsɔ kpe ɖe eŋu la, zi geɖe la, woɖea megbe si le tsitrenu kple nu geɖe siwo le ʋuʋum fiana le screen la dzi. Eyata esɔ gbɔ be woaɖo nyatakaka siwo ku ɖe gɔmeɖoanyia ŋu ko, eye emegbe woaɖo xɔtunu siwo me nyatakaka siwo ku ɖe nusiwo le ʋuʋum ŋu le.
Gɔmeɖose bubu si wozãna le nɔnɔmetatawo ƒe nutete me le MPEG2 ƒe dzidzenua me enye nyatakaka siwo mehiã o tsɔtsɔ ƒu gbe, si sɔ kple gɔmeɖose siwo wozãna le JPEG nɔnɔmetata ƒe nɔnɔme me.
Gake míatrɔ ɖe míaƒe dzeɖoɖoa ƒe tanya ŋutɔŋutɔ ŋu. Gɔmeɖose siae kpɔa ŋusẽ ɖe mɔ̃ɖaŋununya ƒe ŋgɔyiyi dzi: enyo wu, enya kpɔ wu, geɖe wu kple nu sue aɖe eye eƒe asi bɔbɔ wu. Le mía gome la, míefia nɔnɔmetata si ƒe nyonyome nyo wu, si ƒe kekeme le sue wu le nyatakakamɔ̃a (satellite, cable, terrestrial). MPEG2 video codecs ƒe nyonyo na nyateƒe si wònye be fifia na nɔnɔmetatawo ɖoɖoɖa la, wobiaa mɔ̃ si ƒe didime mede zi gbɔ zi 2 o wu esi nɔ anyi le dijitaal nyadzɔdzɔwo kaka ƒe ɣeyiɣia ƒe gɔmedzedze. Le ɣeyiɣi aɖe megbe la, eva dze ƒã be ŋgɔyiyi yeyewo ate ŋu aɖe nyatakaka siwo woɖona ɖe amewo ƒe agbɔsɔsɔ dzi akpɔtɔ ŋutɔ, gake womewɔ ɖeka kple MPEG2 ƒe ɖoɖo si li fifia o. Eyata dɔ si dze ŋgɔ eŋutinunyalawo be woato dzidzenu si sɔ na xexeame katã wu si sɔ kple egbegbe mɔ̃ɖaŋununyawo vɛ.
Le dijitaal satellite television si zãa MPEG2, si ƒe lolome nye 720 kple 576 pixels gome la, nyatakakawo ƒe sisi ƒe agbɔsɔsɔme si sɔ gbɔ wue nye 15 Mbps, eye sisi ƒe tsɔtsɔme si wozãna ŋutɔŋutɔe nye 3-4 Mbps. Le transponder (receiver - transmitter) ɖeka dzi le satellite la dzi la, zi geɖe la, mɔ̃ 8-12 sɔna.
Esi HDTV tsɔe be eƒe lolome nye 1920 kple piksel 1080 ta la, i.e. Esi wònye be screen ƒe teƒea lolo wu TV si wozãna ɖaa zi gbɔ zi 5 ta la, ahiã be woahaya transponder la ƒe afã be wòaɖe HDTV television dɔwɔƒe ɖeka le MPEG2 ƒe dzidzenua nu.
Afɔɖeɖe yeye aɖe si wowɔ le nɔnɔmetatawo ƒe nutete ƒe mɔnuwo toto vɛ mee nye MPEG4 ƒe dzidzenu. MPEG4 ƒe dzidzenua ƒe susu menye be woaɖo adzɔnu ɖeka ɖe ɖoɖo nu o, ke boŋ be woatsɔ dzidzenu sue geɖe siwo me nudzralawo ate ŋu atia esi sɔ na woƒe nuhiahiãwo nyuie wu la aƒo ƒui.
Dzidzenu siwo mesɔ o vevitɔwoe nye:
ISO 14496-1 (Dɔwɔɖoɖowo), MP4 nugoe ƒe nɔnɔme, nɔnɔmetata/nuwɔwɔ aduadu (e.g. DVD menu)
ISO 14496-2 (Video #1), Nyatakaka Blewu Deŋgɔ (ASP) .
ISO 14496-3 (Odio), Odio ƒe Nyatakaka Deŋgɔ (AAC) .
ISO 14496-10 (Video #2), Video ƒe Nyatakaka Deŋgɔ (AVC), si wogayɔna be H.264.
Nyemayɔ mɔ̃ɖaŋununya kple akɔntabubumɔnu siwo wozã le MPEG4 ƒe nɔnɔmea wɔwɔ me ƒe nɔnɔmewo o.
Mina míayi vevitɔ kekeake dzi: DVB-S2 (digitál nyatakakawo ɖoɖoɖa ƒe dzidzenu deŋgɔ aɖe) kple H.264 zazã ɖekae na be nàte ŋu atsɔ mɔ̃ 6-8 ade transponder la me, gake HDTV television xoxo. Ele be míade dzesii be, abe alesi wònɔna ɖaa ene la, nyonyome ƒe dzidziɖedzi mevaa femaxee o: akɔntabubuwo ƒe xexlẽme dzi ɖe edzi ŋutɔ le mɔ̃ siwo xɔa nyatakakawo kple esiwo wotsɔna ɖoa nyatakakawo ɖe amewo siaa me. Nublanuitɔe la, esia kpɔ ŋusẽ gã aɖe ɖe dɔwɔnuwo ƒe asi dzi na nuƒlelawo kple nyadzɔdzɔgblɔlawo.
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December 21, 2024 17:39:31 +0200 GMT
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