Pezani zenizeni za ma CD a Audio ndi mawonekedwe ojambulidwa
Ngakhale CD zomwe zakhala zikulembedwera zakhala zikusowa zosavuta ndi zovuta za kusakaniza nyimbo za digito ndi zojambula , ndi CD yomwe idayambitsa nyimbo za digito. Ambiri amakondabe CD ndipo onse amawagula ndi kuwasewera nthawi zonse. Nazi zomwe muyenera kudziwa zokhudza Ma CD, ndi maofesi okhudzana ndi ma CD.
The Audio CD Format
CD imakhala ndi Compact Disc. Dothi Lokwanira limatanthauzira ma CD ndi ma DVD omwe amasulidwa ndi Philips ndi Sony omwe amajambula pamasom'pamaso, monga momwe ma CD imatchulidwira (1's ndi 0), kulowa muzitsulo pa disc, pogwiritsa ntchito njira yotchedwa PCM chomwe ndi chiyimidwe cha masamu cha nyimbo.
Zojambula zoyamba za CD zinapangidwa ku Germany pa August 17, 1982. Mutu woyamba wa kujambula kwa CD yoyamba: Richard Strauss '- Alpine Symphony . Pambuyo pake chaka chimenecho, pa 1 Oktoba 1982, osewera CD aja anapezeka ku US ndi Japan. CD yoyamba yogulitsidwa (yoyamba ku Japan) inali ya 52nd Street ya Billy Joel yomwe idatulutsidwa kale pa vinyl mu 1978.
CD idayambitsa kusintha kwa digito m'ma audio, PC Gaming, PC yosungirako ntchito, komanso chinathandiza kuti chitukuko cha DVD. Sony ndi Philips amagwirizanitsa zovomerezeka pa chitukuko cha sayansi ya CD ndi CD.
Mtundu wa CD womvera umatchedwanso "Redbook CD".
Kuti mudziwe zambiri zokhudza mbiri ya CD, onani lipoti la CNN.com.
Komanso, fufuzani chithunzi ndi ndemanga yangwiro (yolembedwa mu 1983 ndi Stereophile Magazine) ya sewero loyamba la CD logulitsidwa kwa anthu.
Kuwonjezera pa mauthenga oyamba ojambula, ma CD angagwiritsidwenso ntchito pazinthu zina zambiri:
- CD-R - CD-R imaimira CD-Recordable. Ma discs angagwiritsidwe ntchito kulemba kapena "kuwotcha" nyimbo kapena deta pogwiritsa ntchito CD Recorder (nyimbo) kapena PC (nyimbo kapena deta). Zina mwa CD-R zimasankhidwa kuti nyimbo zizijambula zokha ndipo ena akhoza kulemba zonse nyimbo kapena deta. CD-R ingathe kulembedwa kamodzi.
- CD-RW - Chimodzimodzinso ndi CD-R, kupatula kuti CD ingachotsedwe ndikugwiritsidwanso ntchito (RW kulembedwa kumatanthauza Kulembanso).
- MP3-CD - An MP3 CD ikhoza kukhala CD-R kapena RW ma CD omwe mawonekedwe a nyimbo a MP3 amalembedwera, mmalo mwa ma CD ovomerezeka. Ma disks awa akhoza kusewera kwambiri pa CD, DVD, ndi ma CD Blu (ray).
- JPEG CD ya Photo - JPEG CD yojambula ikhoza kukhala CD-R kapena RW yomwe imakhala ndi zithunzi pazojambula pa JPEG mafayilo. JPEG Ma CD amatha kujambula pa PC ndi CD, DVD, ndi Blu-ray Disc.
- VideoCD - Kuwonjezera pa mafilimu ndi zithunzi, mukhoza kutulutsa kanema pa CD . Izi sizili zofanana ndi DVD, zomwe zimakhala zambiri pakati pa DVD ndi VHS mawonekedwe. Komanso, mavidiyo a CD samasewera kwenikweni pa CD, pokhapokha ngati CD yomwe ili ndi kanema yotulutsa kanema (zomwe sizingatheke) - ngakhale kuti ojambula a VideoCD anali odziwika bwino m'misika yambiri ya ku Asia. VideoCDs imasewera pa DVD ndi DVD.
HDCD
HDCD ndi kusiyana kwa ma CD omwe amamvetsera mauthenga omvera omwe amasungidwa mu CD ndi ma 4-bits ( ma CD ali ndi 16bit audio technology ) mpaka 20bits, HDCD akhoza kuwonjezera mphamvu sonic ya zamakono zamakono a CD ku zatsopano, koma kumathandizabe, ma CD omwe ali ndi CDCD azisewera pa osati a CDCD CD (osati a HDCD amanyalanyaza za "bits" zina) popanda kuwonjezeka kwa mtengo wa ma CD. Komanso, monga magulu oyendetsa mafayilo a HDCD chips, ngakhale ma CD omwe "nthawi zonse" adzamva mokwanira komanso mwachibadwa pa CD player yokonzedwa ndi HDCD.
HDCD idapangidwa ndi Pacific Microsonics, ndipo kenako inakhala katundu wa Microsoft. Dalalo yoyamba ya HDCD inatulutsidwa mu 1995, ndipo ngakhale kuti silinafike pa CD ya CD, maina opitirira 5,000 anatulutsidwa (onani tsatanetsatane wa mndandanda).
Mukamagula CD, muyang'ane ma CDCD kumbuyo kapena mkati. Komabe, pali zowonjezera zambiri zomwe sizikuphatikizapo la HDCD, koma, zikhoza kukhala ndi HDCD discs. Ngati muli ndi sewero la CD yomwe imakhala ndi ma CDCD, idzaizindikira mosavuta ndikupindulanso.
HDCD imatchedwanso High Definition Compatible Digital, High Definition Compact Digital, High Definition Compact Disc
SACD
SACD (Super Audio Compact Disc) ndiwotchi yapamwamba yotulutsa audio yotchedwa Sony ndi Philips (amene anapanga CD). Pogwiritsa ntchito mawonekedwe a fayilo ya Direct Stream Digital (DSD), SACD imapereka chidziwitso cholondola molingana ndi Pulse Code Modulation (PCM) yomwe ikugwiritsidwa ntchito pa CD.
Ngakhale mtundu wa CD umakhala womangidwa ku 44,1 kHz sampuli yamakono , SACD sampangidwe pa 2,8224 MHz. Komanso, ndi mphamvu yosungirako ya 4,7 gigabytes pa diski (ngati DVD), SACD ikhoza kukhala ndi magawo asanu ndi awiri a magawo asanu ndi limodzi. Fomu ya SACD imakhalanso ndi mwayi wosonyeza mafoto ndi mauthenga azithunzithunzi, monga zolembera zamagetsi, koma izi sizinaphatikizidwe mu ma disks ambiri.
Masewera a CD sangathe kusewera SACDs, koma a SACD amatsatiranso ndi ma CD, ndipo ma disks ena a SACD ndi ma CD-awiri omwe amatha kusewera pa CD. Mwa kuyankhula kwina, disk yomweyo ingagwirizane onse ma CD ndi ma SACD malemba. Izi zikutanthawuza kuti mungathe kugulitsa ndalama za SACD zomwe mukuziika pa CD yomwe mumakhala nayo pomwe mukutsata zomwe zili mu SACD pamasewero omwewo ndi SACD.
Tiyenera kuzindikira kuti sizinthu zonse za SACD zomwe zili ndi CD yosanjikiza - zomwe zikutanthawuza kuti muyenera kufufuza diski kuti muwone ngati DDS idatha kusewera pa CD.
Kuonjezerapo, pali ma DVD, Blu-ray, ndi Ultra HD Disc omwe angakhale nawo pamapeto.
SACD ingabwere kumasulidwe awiri kapena njira zambiri. Nthawi zina SACD imakhala ndi CD pa disc, CD imakhala njira ziwiri, koma gawo la SACD lingakhale njira yachiwiri kapena yambiri.
Chinthu china chosonyeza kuti DSD mafayilo oyendetsera mafomu omwe amagwiritsidwa ntchito mu SACD amagwiritsidwanso ntchito ngati imodzi mwa mafomu omwe akugwiritsidwa ntchito popanga ma DVD. Izi zimapereka makamera omvera omwe amamvetsetsanso khalidwe lopangidwa muzojambula zosasangalatsa.
SACD imatchedwanso Super Audio CD, Super Audio Compact Disc, SA-CD