I-Disc Audio Disc Compact (i-SACD) ifomethi ye-disc optique ehloselwe ukudlala okuphezulu kokudlala umsindo. I-SACD yathulwa ngo-1999 yizinkampanini ze-Sony ne-Philips, izinkampani ezifanayo ezazisa i-compact disc (CD). I-format ye-SACD ye-disk ayizange ibanjwe ngokudayisa, futhi ngokukhula kwama-MP3 abadlali nomculo we-digital, imakethe ye-SACD ihlala encane.
Ama-SACD nama-CD
I-compact disc irekhodwe nge-16-bits yokuxazulula ngesilinganiso sampula esingu-44.1kHz. Abadlali be-SACD nama-discs asekelwe ekusetshenzisweni okuqondile kwe-Direct Stream Digital (DSD), ifomethi ye-1-bit enezinga lokulinganisa lika-2.8224MHz, elingama-64 isilinganiso se-standard compact disc. Isilinganiso samphakamiso esiphezulu siphumela ekuphenduleni kwemvamisa okubanzi nokukhiqizwa komsindo ngemininingwane eyengeziwe.
Uhla lwamanothi we-CD lungama-Hz angu-20 kuya ku-20 kHz, okulingana nokuzwa kwabantu (nakuba sibheka ububanzi bethu kunciphisa abanye). Ibanga lezinhlawulo ze-SACD liyi-20Hz kuya ku-50 kHz.
Uhlu oluqinile lwe -CD lungama-decibel angu- 90 (dB) (ububanzi bomuntu lapha bufinyelela ku-120 dB). Uhlobo olushukumisayo lwe-SACD ngu-105 dB.
I-SACD disks ayinakho okuqukethwe kwevidiyo, umsindo kuphela.
Ukuhlola ukuthola ukuthi abantu bangabe bezwa umehluko phakathi kokuqoshwa kweCD ne-SACD, futhi imiphumela ngokuvamile ibonisa ukuthi umuntu ovamile akakwazi ukutshela umehluko phakathi kwamafomu amabili. Imiphumela, noma kunjalo, ayibhekwa njengomgomo.
Izinhlobo ze-SACD Discs
Kunezinhlobo ezintathu zamaDiski e-Super Audio Compact: hybrid, layer-double, kanye nocingo olulodwa.
- Ama-disk hybrid anezendlalelo ezimbili, ungqimba ophezulu osebenzayo ongadlala kuphela kuma-SACD abadlali abahlomile, nocingo lwe-CD oluzodlala kuma-CD ajwayelekile. Ukwengeza, amanye ama-discs e-Hybrid SACD anayo ithrekhi yomjikelezo wesiteshi esingu-5.1 kanye nomkhondo we-stereo. Ithrekhi yendiza eminingi ingadlala kuphela kuma-multichannel abadlali be-SACD.
- Ama-discs ama-SACD angenawo kuphela azodlala kuphela ku-SACD abadlali abahlomile hhayi kuma-CD abadlali abajwayelekile.
- Ama-disk-layer layers agcina umculo ophindwe kabili njengengqimba engqimba eyodwa kodwa ngeke adlale kuma-CD abadlali futhi awavamile.
Izinzuzo ze-SACD
Ngisho nesistimu ye-stereo ethobekile ingazuza ngokucacile okwenyuka nokuthembeka kwezingxoxo ze-SACD. Isilinganiso samphakamiso esiphezulu (2.8224MHz) sinomthelela ekuphenduleni imvamisa enwetshiwe, futhi ama-discd SACD angakwazi ukudlala ukudlala kanye nemininingwane enamandla kakhulu.
Njengoba ama-discd amaningi ama-SACD angama-hybrid types, azodlala ku-SACD nabadlali be-CD abajwayelekile, ngakho-ke bangakwazi ukujabulela ohlelweni lwe-audio ekhaya, kanye nemisindo yezimoto noma ezilalelwayo. Babiza okungaphezu kwama CD ajwayelekile, kodwa abaningi bacabanga ukuthi ikhwalithi yabo ephakeme kakhulu iwufanele izindleko eziphakeme.
Abadlali be-SACD ne-Connections
Abanye abadlali be-SACD badinga uxhumano lwe-analog (noma isiteshi sesi-2 noma isiteshi esingu-5.1) kumuntu otholayo ukuze adlale isendlalelo se-SACD ephakeme ngenxa yezinkinga zokuvikela ikhophi. Uhlaka lwe-CD lungadlalwa ngokuxhumeka kwe-digital coaxial noma optical. Abanye abadlali be-SACD bavumela uxhumano olulodwa lwedijithali (ngezinye izikhathi libizwa i-iLink) phakathi komdlali nomamukeli, okuqeda isidingo sokuhlanganiswa kwe-analog.