Ubunzulu benkcazo Inkcazo kunye nenkcazo
Kwizaziso zedijithali, kufuneka kube nexabiso elithile elibekwe ukuchaza isisombululo sedatha yesandi (iisampuli) eziza kubanjwa kwaye zigcinwe kwifayile ye-audio. Esi sibonelo sibizwa ngokuba bunzulu.
Ngokufanayo, kwiifayile zeefayile kunye nevidiyo, olu luhlu lokulinganisa lusetyenziswa ukucacisa isisombululo somfanekiso. Ukuphakama ubunzulu obunzulu (umz. 16 bit kuya kwe-24 bit) ngcono umfanekiso uza kuba.
Esi sibonelo sinye esifanayo kwi-audio digital kwaye ngoko ke ukuphakama kwe-audio depth kuya kunika ukurekhoda komsindo okuninzi.
Ubunzulu benkomda kaninzi budibaniswa kunye nenani elincinci , kodwa lihluke kakhulu. Isilinganiselo seBat (kulinganiswa kwi- Kbps ) yinto yokukhwela kwedatha ngesibini xa isandi sidlala emuva, kwaye akusisisombululo kwisampuli nganye esicacileyo esenza isandi somsindo. Khangela Ubunzima Bokuxhomekeka Ngomlinganiselo Wentsimbi ngolwazi olungakumbi.
Qaphela: Ubunzima benkompe ngamanye amaxesha bubizwa ngokuba yintlobo yesampula, isisombululo sesandi, okanye ubude begama.
Ulwazi olungakumbi malunga nobunzima beBit
Iyunithi yesilinganiselo ngobuncinane benkcazo idijithali (iibits) kunye nenyuka nganye ye-1-bit, ukuchaneka kabini. Uluhlu olubalulekileyo luyinani elibalulekileyo elibonisa ukuba kulungile ukurekhoda (umzekelo womculo umzekelo).
Ukuba ubunzulu bubuncinane kakhulu, ukurekhoda akuyi kuba nechanekileyo kwaye izandi ezininzi zokuphumla zingalahleka. Ngeengoma ezenza ielayibrari yomculo wedijithali, ii-MP3s ezifakwe kwikhompyutheni yomsindo we- PCM (ngokuqhelekileyo i- WAV ) kunye nobunzulu obunzulu buya kubandakanya i-frequencies ephakamileyo xa kuthelekiswa nalabo abakhokhelwe kwiifayile ze-PCM zangaphambili buncinci bezantsi.
Ngokwemfundiso ke ngoko baya kuba nechanile ngakumbi xa bedlala. Njengoko kwachazwe ngaphambili, ubunzulu benkxalabo bubaluleke ngokukodwa xa bejongene neeHarmoniki ezizolileyo kwiingoma - ukusebenzisa ubunzulu obuphantsi kakhulu kunokukhokelela kwiziphumo ezilahlekileyo.
Ubunzulu benkcenkceshe bubalulekile kuphela xa kunesigxina sePMM, oko kutheni iifomati zokunciphisa izandi ezilahlayo zingabi nzulu.
Ezinye iindlela Izithintelo zobungakanani zichaphazela umgangatho wezandi
Ukuqinisekisa ukuba iifayile zomsindo wedijithali azihluphekanga ngokucoca kubalulekile, kodwa ukufumana ubunzulu obuncinci kubaluleke kakhulu ekuqwalaseleni ukwenzela ukunciphisa inani lemvelaphi yengxolo.
Yonke into yokurekhoda ine-degree of interference signal (ebizwa ngokuba ngumgangatho womsindo) ongagcinwa ubuncinci xa usebenzisa ubunzulu obunzulu ngokwaneleyo. Oku kungenxa yokuba uluhlu olushukumisayo (ulwahlulo phakathi kokuvakala kunye nezandi ezithulekileyo) luya kuba lukhulu kunomgangatho womsindo, okuvumela ukuba umehluko ugcine ingxolo ubuncinci.
Ubunzulu benkqonkqo bubonisa ukuba irekhoda enkulu iya kuba njani. Ukunyuka kwe-1 bit, kukho malunga ne-6 dB yoluhlu olunezixhobo ezongeziweyo. Ifomathi eyaziwa kakhulu kwiimidiya ezisetyenziswayo namhlanje ifomathi yeCD yomsindo, esebenzisa ubunzulu obude be-16, obulingana no-96 dB yohlu olunamandla. Ukuba i-DVD okanye i-Blu-ray isetyenzisiweyo, umgangatho ozwakalayo uphezulu ngenxa yokuba ubunzulu bentsimbi esetyenziswayo ngu-24, obanika i-144 dB yoluhlu olushukumisayo.