49.152MHz ati 45.1584MHz: Awọn ọkan ọkan ti Digital Audio ni Ile-iṣẹ Ohun

9.152MHz ati 45.1584MHz: Awọn "Heartbeats" ti Digital Audio ninu awọn Audio Industry

49.152MHz ati 45.1584MHz jẹ bọtini giga meji giga - awọn igbohunsafẹfẹ aago deede, ni pataki ti a lo lati ṣe ipilẹṣẹ awọn oṣuwọn iṣapẹẹrẹ itọkasi fun awọn eto ohun afetigbọ oni-nọmba. Iṣẹ pataki wọn ni lati pese awọn ifihan agbara akoko iduroṣinṣin{4} fun awọn ọna kika ohun afetigbọ oriṣiriṣi nipasẹ imọ-ẹrọ pipin igbohunsafẹfẹ, nitorinaa idinku akoko jitter (Jitter) ati idaniloju didara ohun didara. Atẹle ni ohun elo ati afiwe imọ-ẹrọ ti awọn meji ni awọn aaye oriṣiriṣi:

1. Core Igbohunsafẹfẹ Pipin Ibasepo ati Audio Standards

1. Igbohunsafẹfẹ Pipin ati Iṣapẹẹrẹ Oṣuwọn

49.152MHz:

o Awọn ibi-afẹde pipin igbohunsafẹfẹ: 48kHz (boṣewa ohun afetigbọ ọjọgbọn), 96kHz, 192kHz.

o Awọn agbekalẹ:

§ 48kHz=49.152MHz ÷ 1024

§ 96kHz=49.152MHz ÷ 512

§ 192kHz=49.152MHz ÷ 256

o Awọn ipele ti o baamu: Fiimu ati iṣelọpọ tẹlifisiọnu (48kHz), awọn iṣẹ ṣiṣanwọle (fun apẹẹrẹ, Netflix, Spotify), ohun elo gbigbasilẹ ọjọgbọn.

45.1584MHz:

Eyin Awọn ibi-afẹde pipin igbohunsafẹfẹ: 44.1kHz (didara ohun CD), 88.2kHz, 176.4kHz.

o Awọn agbekalẹ:

§ 44.1kHz=45.1584MHz ÷ 1024

§ 88.2kHz= 45.1584MHz ÷ 512

§ 176.4kHz=45.1584MHz ÷ 256

o Awọn ipele ti o baamu: ṣiṣiṣẹsẹhin CD/SACD, awọn ọna kika ibi ipamọ orin ibile (fun apẹẹrẹ, WAV, FLAC).

2. Pupọ -Ibamu Oṣuwọn Iṣapẹẹrẹ

· Apẹrẹ aago meji{{0}: Awọn ẹrọ giga{1} (fun apẹẹrẹ, dCS Vivaldi DAC) ṣepọ awọn kirisita meji nigbakanna, ṣiṣe iyipada aladaaṣe lati ṣe atilẹyin awọn orisun ohun afetigbọ 44.1kHz ati 48kHz jara.

Iyipada Oṣuwọn Aṣepọ Asynchronous (ASRC): Ṣe iṣọkan aago nipasẹ FPGA tabi awọn eerun iyasọtọ, ṣugbọn o le ṣafihan jitter akoko ni afikun, ni ipa lori didara ohun.

2. Awọn oju iṣẹlẹ Ohun elo ati Awọn ibeere Imọ-ẹrọ

1. Professional Audio Equipment

Ohun elo Studio:

Awọn olugbasilẹ orin pupọ (fun apẹẹrẹ, AVID Pro Tools HDX) lo 49.152MHz lati ṣe ipilẹṣẹ aago 48kHz, ni idaniloju mimuuṣiṣẹpọ pẹlu ifiweranṣẹ{5} iṣelọpọ fun fiimu ati tẹlifisiọnu.

Ohun elo Titunto si (fun apẹẹrẹ, Prism Sound ADA-8XR) nilo lati ṣe atilẹyin mejeeji 44.1kHz ati 48kHz, gbigba apẹrẹ aago meji.

· Awọn ọna igbohunsafefe:

Awọn itunu idapọpọ (fun apẹẹrẹ, Lawo mc²56) gbarale 49.152MHz lati ṣe awọn ifihan agbara 48kHz, ipade awọn iṣedede ohun afetigbọ tẹlifisiọnu (fun apẹẹrẹ, AES3).

2. Awọn ọja Itanna Olumulo

· Hi- Awọn Eto Ohun Ohun:

·

Awọn oṣere CD/SACD (fun apẹẹrẹ, Esoteric K-01XD) lo 45.1584MHz lati mu ṣiṣiṣẹsẹhin 44.1kHz dara si.

Awọn oluyipada ṣiṣanwọle (fun apẹẹrẹ, Linn Klimax DSM) ṣe atilẹyin 48kHz giga{3} ṣiṣanwọle ipinnu nipasẹ 49.152MHz.

· Awọn ile iṣere ile:

Awọn ampilifaya AV (fun apẹẹrẹ, Denon AVR-X8500H) nilo lati wa ni ibaramu pẹlu awọn igbohunsafẹfẹ mejeeji lati baamu akoonu Blu{4} ray (48kHz) ati CD (44.1kHz).

3. Ohun afetigbọ ọkọ ayọkẹlẹ ati Awọn ẹrọ to ṣee gbe

Ninu - Awọn oluṣe Iṣe ifihan agbara oni-nọmba (DSPs):

Lo 49.152MHz lati ṣe awọn ifihan agbara 48kHz, idinku Jitter ti o ṣẹlẹ nipasẹ ni- kikọlu ipese agbara ọkọ.

Awọn Amplifiers Agbekọri DAC to ṣee gbe (fun apẹẹrẹ, iFi Audio Hip-DAC):

Ṣepọ awọn kristali agbara kekere-45.1584MHz lati mu ṣiṣiṣẹsẹhin orisun ohun 44.1kHz ṣiṣẹ lori awọn ẹrọ alagbeka.

## 3. Ifiwewe Imọ-ẹrọ ati Awọn ero Aṣayan

Awọn iṣeduro Aṣayan:

· Fiimu ati Tẹlifisiọnu / Media ṣiṣanwọle: Ṣe iṣaaju 49.152MHz lati rii daju ibamu pẹlu jara 48kHz.

· Sisisẹsẹhin Orin ati CD/SACD: Yan 45.1584MHz fun apẹrẹ iṣapeye.

Ọpọ - Awọn ọna ṣiṣe ibaramu ọna kika: Gba aago meji- + FPGA iyipada ti o ni agbara (fun apẹẹrẹ, Itọkasi MSB DAC).

49.152MHz ati 45.1584MHz jẹ "awọn ọkan ọkan" ti ohun oni-nọmba ninu ile-iṣẹ ohun afetigbọ, ṣiṣe awọn ọna ṣiṣe pataki meji: fiimu / tẹlifisiọnu / media sisanwọle (48kHz jara) ati ibi ipamọ orin (44.1kHz jara) lẹsẹsẹ. Awọn ohun elo ti o ga-opin yoo dinku Jitter ati mimu-pada sipo didara ohun funfun nipasẹ awọn ọna ṣiṣe aago meji, ultra{7}}kekere-awọn ipese agbara ariwo, ati awọn ipilẹ PCB to peye. Lọ́jọ́ iwájú, pẹ̀lú ìgbòkègbodò ohun gíga{10}} àti àwọn ipa ìró ohun ìmúrasílẹ̀, ìmọ̀ iṣẹ́ ẹ̀rọ aago yíò tẹ̀síwájú sí ìdàgbàsókè sí ultra{11}}ariwo ipele kékeré