Ziyini zonke lezo zigcawu kanye nemiphetho egaxekile ngezinye izikhathi ngibona esikrinini sami se-TV?
Uma sibuka uhlelo noma i-movie ku-TV noma isikrini sokubukwa kwevidiyo, sifuna ukubona izithombe ezibushelelezi ezihlanzekile ngaphandle kokuphazanyiswa, futhi ngaphandle kwemishini. Ngeshwa, zikhona izimo lapho kwenzeka khona lokho. Izinto ezimbili ezingathandekayo, kodwa ezivamile, ongase uzibone ku-TV yakho noma isikrini sokubukwa ngesikhathi sokubukwa yi-Macroblocking ne-Pixelation.
Yimuphi ama-macroblocking
I-Macroblocking yi-artifact yevidiyo lapho izinto noma izindawo zesithombe sevidiyo kubonakala sengathi zakhiwa ngezikwele ezincane, kunokuba kube nemininingwane efanele kanye nemigqa ebushelelezi. Amabhuloki angabonakala kuwo wonke umfanekiso, noma nje ezingxenyeni zesithombe. Izimbangela ze-macroblocking zihlobene nenye noma ngaphezulu kwezici ezilandelayo: ukucindezelwa kwevidyo , isivinini sokudlulisa idatha, ukuphazamiseka kwesignali nokusebenza kwe-video processing.
Lapho i-Macroblocking Iyabonakala kakhulu
I-Macroblocking ibonakala kakhulu kwikhebula, i-satellites, nezinsizakalo zokusakaza nge-intanethi njengoba lezo zinsuku ngezinye izikhathi zisebenzisa ukucindezelwa kwevidiyo ngokweqile ukuze kufinyelele iziteshi ezingaphezulu kwengqalasizinda yabo ye-bandwidth.
I-macroblocking nayo ingenzeka futhi, ngezinga eliphansi, ngesikhathi sokusakazwa kwe-TV ngaphezulu. Imiphumela yayo ibonakala ngokwengeziwe kumahlelo wezinhlelo ngokunyakaza okukhulu (ibhola liyisibonelo esivamile) njengoba lokho kudinga idatha engaphezulu yevidiyo ukuthi idluliselwe nganoma yisiphi isikhathi esithile.
Esinye isici esingabangela ukukhishwa kwe-macroblocking ukuphazamiseka okuphakathi kokusakaza, ikhebuli noma isignali yokusakaza. Uma lokhu kwenzeka, ungase ubone isithombe esincane esincane esivezwa ku-TV yakho noma kwesikrini sokubukwa esakhiwe ngezikwele kanye nemigoqo eqondile noma evulekile.
I-Macroblocking nayo ingabangela ukucubungula kwevidiyo okungalungile kanye / noma ukuphakanyiswa ngedivayisi yokudlala noma yokubonisa. Isibonelo, uma une-player ye-upscaling ye-DVD engakwazi ukucubungula nokuphakamisa ividiyo kusuka ekujwayelekile kuya ku-HD isinqumo ngokushesha, ungase ubone ezinye izimo eziphakathi kokudonswa kwe-macroblocking, futhi, cishe, ngesikhathi sezithombe ezinokuzulazula noma izizinda ezingenayo. Ukukhishwa kwe-Macroblocking kungase kubonakale kumabonakude we-TV, amaCheth / Satellite (ikakhulukazi emidlalweni yezemidlalo) lapho ukunyakaza kushesha kakhulu futhi futhi noma isignali yokusakaza noma i-TV yakho ayikwazi ukuqhubeka. Futhi, uma ijubane lakho le- intanethi lingasheshi ngokwanele , lokho kungabangela nezinkinga zokuvimbela ngokusakaza okuqukethwe.
I-Pixelation
I-macroblocking ngezinye izikhathi ibizwa ngokuthi i-pixelation, futhi nakuba ifana nayo, i-pixelation iyinhlobo ephawulekayo yesinyathelo-esiteji esithinta izinyathelo ezithile ngezinye izikhathi ezibonakalayo emaphethelweni wezinto ngokuphathelene nesizinda, noma imiphetho engaphakathi, njengezinwele ekhanda noma emzimbeni. I-pixelation inikeza izinto ukubukeka okunzima. Kuye ngesinqumo sesithombe, ubukhulu beskrini noma ukuthi uhlala eduze kangakanani noma ubude kangakanani esikrinini, umphumela we-pixelation ungabonakala ngokwengeziwe.
Indlela engcono kakhulu yokuqonda i-pixelation ukuthatha isithombe usebenzisa ikhamera yedijithali noma ifoni bese uyibukela kwesikrini sakho se-PC noma isikrini se-laptop. Bese usondeza noma uphazamise ubukhulu besithombe. Uma usondeza noma uphuthukisa isithombe, isithombe sizobukeka, futhi uzoqala ukubona imiphetho enamanzi nokulahlekelwa kwemininingwane. Ekugcineni, uzoqala ukuqaphela ukuthi izinto ezincane kanye nemikhawulo yezinto ezinkulu ziqala ukubukeka njengechungechunge lwamabhuloki amancane.
I-Macroblocking ne-Pixelation kumaDVD aqoshiwe
Enye indlela ongase uhlangane ngayo nokukhishwa kwe-macroblocking kanye / noma ukupakeliswa ku- DVD eqoshiwe . Uma irekhodi lakho le-DVD (noma umlobi we-PC-DVD) lingenayo isivinini sokubhala esanele ngokwanele noma ukhetha izindlela zokurekhoda ezingu-4, 6, noma ezingu-8 (okwandisa inani lokucindezela elisetshenzisiwe) ukuze uvumelane nesinye isikhathi sevidiyo ku-disc , umrekhoda we-DVD angeke akwazi ukwamukela inani lemininingwane engenayo yevidiyo.
Ngenxa yalokho, ungagcina kokubili amafeleli ahlahliwe aphakathi, i-pixelation kanye nemiphumela yokuhlunga ngokuphindaphindiwe. Kulesi simo, kusukela amafreyimu ahlahliwe kanye nemiphumela ye-pixelation kanye / noma imenyu yokukhishwa kwe-macroblocking empeleni ibhaliswe kwi-disc, akukho ukucubungula kwevidiyo eyengeziwe eyakhiwe yabadlali be-DVD noma i-TV ingawasusa.
Okubalulekile
I-Macroblocking nePixelation yizinto ezibonakalayo ezingabonakala ngenkathi kubukela okuqukethwe kwevidiyo kusuka emithonjeni ehlukahlukene. Njengoba ukukhishwa kwe-macroblocking ne-pixelation kungaba umphumela weyodwa yezici ezimbalwa, kungakhathaliseki ukuthi unayo i-TV, ungathola imiphumela yawo ngezikhathi ezithile.
Noma kunjalo, i-video compression codecs (efana ne- Mpeg4 ne- H264 ) nama-processor video ahlanjulisiwe kanye nabakhuphuki bevidiyo abaye banciphisa izimo ze-macroblocking ne-pixelation kuwo wonke amabhodi kusukela kumsakazo, wekhebula nokusabalalisa amasevisi, kodwa ukuphazanyiswa kwesignali ngezinye izikhathi kungenakuvinjelwa.
Futhi, kufanele kuqaphele ukuthi ama-macroblocking kanye ne-pixelation angase futhi akhiqizwe ngezinhloso zokudala abaculi noma abasakazwayo, njengokuthi lapho ubuso bomuntu, amaflethi elayisensi yemoto, izingxenye zomzimba zangasese noma olunye ulwazi lokuhlonza lufihliwe ngenhloso ngumhlinzeki wokuqukethwe okubonakalayo ngababukeli be-TV.
Lokhu kwenzeka ngezinye izikhathi kuma-newscasts we-TV, imibukiso ye-TV yangempela, neminye imicimbi yezemidlalo lapho abantu bengase banganikeze imvume yokusebenzisa isithombe sabo, bavikele abasolwa abasolwa ekukhonjweni ngesikhathi sokuboshwa noma ukuvimbela amagama angama-brand afakwe kwi-tee-shirts noma ngezigqoko.
Kodwa-ke, okusetshenziselwa ukusetshenziswa okunamandla, i-Macroblocking ne-pixelation nakanjani kuyizinto ezingalungile ongafuni ukuzibona esikrinini sakho se-TV.