✔️ 2022-09-21 17:01:54 - Paris/France.
NguJulien Le Tanou, iNjineli ePhezulu, iTekhnoloji yeVidiyo, iMediaKind
Ngelixa imfuno ye Ukusasaza Ividiyo ihambela phezulu kwihlabathi jikelele, ababoneleli bomxholo baqhubeka behlola iindlela ezintsha zoxinzelelo ukuze baqinisekise ukuba ulindelo lwabathengi kumava okujonga okusemgangathweni kuyahlangatyezwa. Ngezixhobo ezininzi, amaqonga, kunye nemigangatho kunanini na ngaphambili, kukho iindawo ezininzi zokuphucula ekufuneka uziqwalasele ngononophelo ukuhambisa ividiyo kwinqanaba elifanelekileyo lomgangatho kunye ne-bitrate. Ukukhetha isicwangciso esifanelekileyo sokukhowudwa kunokuba sisigqibo kumaqonga okusasaza. Ukusasaza abajonge ukuphawula indawo yabo kwishishini leendaba elikhuphisanayo. Kwaye yindawo apho iMediaKind inebhongo ngokukhokela ishishini.
Ewe, xa kufikwa kwii-codecs (okt imigangatho), kufuneka siqwalasele indlela ii-codecs ekugqibeleni zichaza ngayo i-syntax kunye nokusebenza okufunekayo kwe-decoder. Idekhowuda nganye ivelisa imveliso efanayo kumjelo omncinci onikiweyo. Iikhowudi kuphunyezo oluthile lwekhowudi okanye umgangatho kwaye, kwiimeko ezininzi, zikhululekile ukukhetha ukuba zifuna ukufakwa njani ikhowudi (ukuba imveliso iyahambelana). Ukwandisa ubuchwephesha kunye namandla ekhompyuter kuthetha ukwakha iikhowudi ezisebenza ngakumbi ngelixa ugcina ukuhambelana neekhowudi ezikhoyo.
Kutheni oku kubalulekile? Kuba xa sizama ukuvavanya i-codec, ngokusisiseko sithelekisa ii-encoders. Iikhowudi zisenokubonisa okanye zingabonisi ukusebenza okunokwenzeka ngekhowudi enikiweyo kolunye umiliselo. Kwaye umahluko phakathi kophunyezo olwahlukeneyo ngokwemigaqo yobuchule bokubhala ikhowudi ngokulula unokuba mkhulu kakhulu kunaphakathi kweekhowudi - ngoko ke kubalulekile ukuthathela ingqalelo olona zalisekiso olusetyenzisiweyo, kunye nolungelelwaniso lwazo.
I-MediaKind inobuchwephesha obunzulu kunye nelifa lemveli kuphuhliso lwe-codec, kwaye kutshanje sivelise umxholo we-UHD OTT Ukusasaza phila ngokubulela kutyalo-mali olubalulekileyo kwi-codec yamva nje yoshishino, i-Versatile Video Codec (VVC).
I-MediaKind inikezela ngenxalenye ebalulekileyo ye-R&D yayo kuphuhliso lwekhowudi, kwaye sibona ukwanda kwamanqanaba okwamkelwa kweVVC phakathi kwamaqumrhu aphambili kunye nemibutho. Singomnye weenkampani ezimbalwa kwishishini ukwenza ukuba i-UHD OTT VVC isasazeke kwilifu loluntu ngesisombululo sethu se-Aquila. Ukusasaza. Lo asingomsebenzi ulula. THE Ukusasaza I-Live UHD ihlala ingomnye wemingeni eqhubekayo ejongene neshishini lethu ngenxa yomthamo wothungelwano ofunekayo ukumelana nokusasaza ngokuthembekileyo iziganeko ezinkulu. Oku kwenza ukunyanzeliswa okusebenzayo kube sisihloko esifanelekileyo kulo lonke ishishini leendaba, kwaye ukusetyenziswa kwe-MediaKind yeVVC kule meko lixesha lokuchitha amanzi.
Lo ngumxholo oye wagutyungelwa ixesha elide ngugxa wam, uCarl Furgusson, ngexesha lewebinar yephaneli yeFaultline yamva nje malunga nekamva leekhowudi, onokuthi uzibukele apha. UCarl uya kuxubusha kwakhona iingcamango zakhe ngesihloko kwisithuba seblogi ezayo.
Ehlotyeni ngo-2022, iMediaKind isasazwe ngempumelelo kwaye yaqinisekisa i-OTT UHD itshaneli ephilayo exhasa iVVC, isebenzisa iqonga lethu le-Aquila. Ukusasaza njengenkonzo, isebenza ngokupheleleyo kwiqonga lelifu likawonke-wonke le-Azure likaMicrosoft. Ukuseta itshaneli yeOTT kusetyenziswe uAkwila Ukusasaza ngosasazo lwe-OTT UHD ephilayo usebenzisa olu cwangciso lulandelayo:
- Igalelo: UHD HEVC Main10, 50/59,94 fps
- I-MediaKind Encoding Live (MKEL) i-VVC ABR encoding (ene-transcoding esuka kwi-H264 okanye i-HEVC) usebenzisa i-MKEL "i-split encoding" feature. Oku kusebenzisa iimeko ezimbini zokucwangcisa: enye yeprofayile ye-UHD kwaye enye yeeprofayili eziseleyo. Iinkangeleko zekhowudi zibandakanyiwe:
- I-UHD (3840 × 2160) p 50/59.94fps, iVVC eyona nto iphambili, i-10bit
- 1920×1080p 50/59.94fps VVC Main Extreme, 10bit
- 1280×720p 50/59.94fps, VVC Eyona kakhulu
- 960×540p 50/59.94fps, VVC Eyona kakhulu
Ngenkqubo yethu yangoku ye-VVC ye-real-time encoding application, sinokufikelela kwi-avareji yogcino lwe-15% (ukuya kuthi ga kwi-30%) kumgangatho ofanayo wevidiyo xa kuthelekiswa nesisombululo sethu se-UHD OTT HEVC esebenza e-Azure. I-computitional overhead ye-VVC coding xa ithelekiswa ne-HEVC imalunga ne-36%.
Itheyibhile yoku-1 ibonisa owona mndilili kunye nowona wonga ugcino olungcono kumanqaku afanayo omgangatho wevidiyo aphunyezwe sisisombululo sethu sangoku seVVC UHD esisebenza eAzure. Iziphumo zedatha zilinganiswe kwiseti yovavanyo lwe-15 UHD imixholo yevidiyo egubungela iindidi ezininzi ze-encoding complex.
Itheyibhile 2 ibonisa iintlobo ezahlukeneyo zemizekelo ye-Azure esetyenziselwa ukufaka iphrofayili ye-UHD HEVC kunye neprofayili ye-UHD ye-VVC yexesha langempela kunye namaxabiso abo oluntu asetyenziselwa ukugqiba i-VVC ehambelana neendleko eziphezulu.
Ukugcinwa kokuhamba (%) kumgangatho ofanayo | indlela | best |
SSIM | -15,3% | -33% |
I-MS-SSIM | -13,3% | -29% |
PSNR | -16,9% | -32,8% |
Itheyibhile 1: Ukugcinwa kwe- throughput (%) ye-Live VVC UHD isisombululo esisebenza kwi-Azure xa kuthelekiswa ne-Live HEVC UHD
Itheyibhile 2: Iindleko zohlobo lwe-Azure lwe-UHD Live encoding
Ngelixa i-HEVC isabonelela ngendlela esebenzayo yokubeka i-UHD, i-VVC iya kuvula iingcango ezininzi kubasasazo ukuba bafezekise ukuphumelela okubonakalayo, ukunciphisa iindleko Ukusasaza kwaye wenze uqhagamshelwano olukhulu. Kwaye ekugqibeleni, ukwamkelwa okubanzi kakhulu komxholo we-4K kunye ne-8K.
Ezi mpumelelo zenziwe kuphela ngenxa yomsebenzi obalaseleyo weMediaKind yevidiyo yekhowudi kunye namaqela okuhambisa.
Ukuba ungathanda ukufunda ngakumbi malunga nento esiyenzayo kwihlabathi le-UHD OTT VVC yokusasaza ngqo, yiza uhlanganyele nathi kule veki yeSCTE Cable Tech Expo, Septemba 19-22 ePhiladelphia!
SOURCE: Uphonononga Iindaba
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