49.152MHz kanye no-45.1584MHz: Ukushaya kwenhliziyo komsindo wedijithali embonini yomsindo

9.152MHz kanye no-45.1584MHz: "Ukushaya kwenhliziyo" komsindo wedijithali embonini yomsindo

I-49.152MHz kanye ne-45.1584MHz amafrikhwensi amabili okhiye aphezulu-okunemba kwewashi, asetshenziselwa kakhulu ukukhiqiza izilinganiso zesampula zereferensi zamasistimu omsindo wedijithali. Umsebenzi wabo oyinhloko uwukunikeza isikhathi esizinzile{4}}amasiginali esisekelo amafomethi ahlukene omsindo ngobuchwepheshe bokuhlukanisa imvamisa, ngaleyo ndlela kuncishiswe i-timing jitter (Jitter) nokuqinisekisa ikhwalithi yomsindo emsulwa. Okulandelayo ukusetshenziswa kanye nokuqhathanisa kobuchwepheshe kokubili emikhakheni ehlukene:

1. Ubudlelwano Bokuhlukaniswa Kwemvamisa Eyisisekelo kanye Namazinga Omsindo

1. I-Frequency Division kanye ne-Sampling Rate

49.152MHz:

o Okuqondiwe kokuhlukaniswa kwamaza: 48kHz (izinga lomsindo elisebenzayo), 96kHz, 192kHz.

o Amafomula:

§ 48kHz=49.152MHz ÷ 1024

§ 96kHz=49.152MHz ÷ 512

§ 192kHz=49.152MHz ÷ 256

o Amazinga ahambisanayo: Ukukhiqizwa kwefilimu nomabonakude (48kHz), izinsiza zokusakaza (isb, iNetflix, iSpotify), imishini yokurekhoda echwepheshile.

45.1584MHz:

o Okuqondiwe kokuhlukaniswa kwamaza: 44.1kHz (ikhwalithi yomsindo we-CD), 88.2kHz, 176.4kHz.

o Amafomula:

§ 44.1kHz=45.1584MHz ÷ 1024

§ 88.2kHz=45.1584MHz ÷ 512

§ 176.4kHz=45.1584MHz ÷ 256

o Amazinga ahambelanayo: ukudlalwa kwe-CD/SACD, amafomethi okugcina umculo wendabuko (isib., WAV, FLAC).

2. Okuningi-Ukuhambisana Kwesilinganiso Sesampula

· Idizayini yewashi-embaxambili: Amadivayisi{1}}okugcina aphezulu (isb, i-dCS Vivaldi DAC) ahlanganisa amakristalu amabili ngesikhathi esisodwa, okuvumela ukushintsha okuzenzakalelayo ukuze kusekelwe imithombo yomsindo engu-44.1kHz no-48kHz.

· I-Asynchronous Sample Rate Conversion (ASRC): Ihlanganisa iwashi nge-FPGA noma ama-chips azinikele, kodwa ingase yethule i-jitter yesikhathi eyengeziwe, ethinta ikhwalithi yomsindo.

2. Izimo zohlelo lokusebenza kanye nezimfuneko zobuchwepheshe

1. Izisetshenziswa Zomsindo Ezisebenzayo

· Izisetshenziswa zeStudio:

-Amarekhoda amathrekhi amaningi (isb, AVID Pro Tools HDX) asebenzisa u-49.152MHz ukuze akhiqize iwashi elingu-48kHz, okuqinisekisa ukuvumelanisa nokuthunyelwe{5}}kokukhiqizwa kwefilimu nomabonakude.

Izisetshenziswa eziyinhloko (isb., i-Prism Sound ADA-i-8XR) idinga ukusekela kokubili okungu-44.1kHz no-48kHz, isebenzisa idizayini enamawashi amabili.

· Izinhlelo Zokusakaza:

Ukuxuba ama-consoles (isb, i-Lawo mc²56) incike ku-49.152MHz ukuze ikhiqize amasiginali angu-48kHz, ihlangabezane namazinga omsindo wokusakaza kamabonakude (isb, AES3).

2. Imikhiqizo ye-Electronic Consumer

· Sawubona{{0}Amasistimu omsindo we-Fi:

·

Izidlali ze-CD/SACD (isb, i-Esoteric K-01XD) zisebenzisa u-45.1584MHz ukuthuthukisa ukudlala okungu-44.1kHz.

Amadekhoda okusakaza bukhoma (isb., i-Linn Klimax DSM) asekela ukusakaza bukhoma okungu-48kHz{3}} nge-49.152MHz.

· Amatiyetha asekhaya:

Ama-amplifiers e-AV (isb., i-Denon AVR-i-X8500H) idinga ukusebenzisana nawo womabili amafrikhwensi ukuze afane nokuqukethwe kwe-Blu-ray (48kHz) ne-CD (44.1kHz).

3. Umsindo Wemoto Namadivayisi Aphathekayo

· Emotweni-Ama-Digital Signal Processors (DSPs):

Sebenzisa u-49.152MHz ukuze ukhiqize amasiginali angu-48kHz, wehlise i-Jitter ebangelwa-ukuphazamiseka kokuphakelwa kwamandla emoto.

· Izikhulisi Zekhanda Eziphathwayo ze-DAC (isb, i-iFi Audio Hip-i-DAC):

Hlanganisa{0}}amakristalu aphansi angu-45.1584MHz ukuze uthuthukise ukudlalwa komthombo womsindo ongu-44.1kHz kumadivayisi eselula.

## 3. Ukuqhathaniswa Kwezobuchwepheshe Nokucatshangelwa Kokukhetha

Izincomo zokukhetha:

· Imidiya Yefilimu Nethelevishini/Yokusakaza: Beka kuqala i-49.152MHz ukuze uqinisekise ukuhambisana nochungechunge lwama-48kHz.

· Ukudlala Umculo kanye ne-CD/SACD: Khetha u-45.1584MHz ukuze uthole idizayini ethuthukisiwe.

· Amasistimu{{0}Avumelana Nefomethi Eningi: Sebenzisa okubili-iwashi + nokushintsha okuguquguqukayo kwe-FPGA (isb, i-MSB Reference DAC).

I-49.152MHz kanye ne-45.1584MHz "iwukushaya kwenhliziyo" komsindo wedijithali embonini yomsindo, enikeza amasistimu amabili amakhulu: ifilimu/umabonakude/imidiya yokusakaza (uchungechunge lwama-48kHz) nokugcinwa komculo (uchungechunge lwama-44.1kHz) ngokulandelana. Amadivayisi-asezingeni eliphezulu anciphisa i-Jitter futhi abuyisele ikhwalithi yomsindo omsulwa-ngezakhiwo zewashi ezimbaxambili,{7}}ukunikezwa kwamandla{8}}okunomsindo ophansi kakhulu, nezakhiwo ezinembile ze-PCB. Ngokuzayo, ngokusakazwa komsindo{10}}wokulungiswa okuphezulu nomsindo ogxilile, ubuchwepheshe bewashi buzoqhubeka buguqukela emsindweni{11}}ophakeme kakhulu.