
drishya shravya

visualodio ack pariyojana haye joe ack phonograph record kii tasveer seey dhwani praapt karati haye. yeh swiss rashtriya dhwani abhilekhagar aur school off engineering aind architecture off freeberg key beach saajhedaari seey utpann huaa.
parichay.
chumbakiya tepon kii shuruat seey pahale dhwani koo sanrakshit karane kaa ekmatra saadhan disk they. 1950 key dashak mein vinail key aagaman taka, abhilekh shelack yaa mome seey baney they. inn padarthon kii javic sanrachana ney unhein samay key saath apghatit karane mein saksham banaaya aur unhein kavak dwara hamale key liye pravan bhee banaa diyaa.
parinamswarup, advitiya mool radio prastutiyon sahit kaee record bigadane kii sthiti mein hain, joe paaramparik yaantrik sadhanon seey khel koo rokta haye, isaliye gair-sampark drishtikon mein ruchi haye.
itihas.
optical scanning key madhyam seey puraane record kii dhwani kii iss vasuli kaa vichaar 1999 kii garmiyon mein lugano mein shuru huaa, swiss rashtriya dhwani abhilekhagar ("phonoteca nazional") stephano aiss key takniki prabandhak key beach. cavaglary (bauddhik sampada key nirmaata aur dhaarak, pariyojana key aarambhakarta), aim aind see prabandhan aur sanchaar saa pier hemmer (pariyojana key saha-nirmaata) key poorv nideshak, aur swiss rashtriya dhwani abhilekhagar key nideshak piyo pelizari (pariyojana key saha-nirmaata).
engineering aur vastukala kaa freeberg school ("hoshchule phur technic unda architekur freeberg") mukhya bhagidar thaa, pahale isaki vyavaharyata kaa adhyayan curr rhaa thaa aur phir ack pariyojana shuru curr rhaa thaa joe varshon seey aage badhee.
siddhant.
phonograph record key samanya playback key dauran, khaanche key baad ack stylus dwara dhwani praapt kii jaati haye.
khaanche kaa radial visthaapan ack sookshmadarshi key madhyam seey avalokan yogya haye jiska arth haye kii dhwani jaankaari dikhaai detee haye.
yadi record key pratyek paksh kii ack uchch-resolution analogue tasveer lii jaati haye aur film mein jaankaari koo ack golakar scanner kaa upayog karke digital kiya jaataa haye, tou vibhinn algorithm dhwani koo nikaalane aur punarnirmaan karane key liye chhavi koo sansaadhit curr sakate hain.
vidhi.
photography.
prakriya kaa ack kendriya bhaag photo shooting haye. ise ack film key roop mein sangraheet karane key liye, ise prakriya kii shuruat mein ack thheek seey saaf kiye gaye record parr kiya jaataa haye. 
photographic film mein prati mimi 600 lines kaa uchch resolution haye. yeh sankalp khaanche key visthaapan kaa sateek roop seey paalan karane key liye paryaapt haye.
scanning prakriya.
ack baar jaba record samagri koo ack photographic film parr sangraheet kiya jaataa haye, tou agala kadam mool dhwani koo punarpraapt karna hotaa haye. freeberg key vishvavidyalaya key anuprayukt vigyaan ney aisaa karane key liye ack scanner prototype banaaya. 
scanner kaa vartamaan sanskaran ack kaanch kii ghoornan plate seey banaa haye, jiss parr film rakhee gaee haye. chhavi kaa digitalikaran 2048 pixel chaude ack raikhik see. see. dee. cameray dwara kiya jaataa haye, joe niyamit antaral parr chitra letaa haye, jisamen prati ghoornan 25,000 seey 200,000 rekhaaon taka kii aavrittiyaan hoti hain. ghoornan film key saath cameray kaa sanyojan ack angoothi key aaytaakaar chitra key roop mein record kaa ack rotary scan pradaan kartaa haye. ack doosara radial andolan agali ring pradaan kartaa haye.
chhavi prasanskaran.
ack baar digitise honey key baad, chhaviyon koo vishleshan karane aur khaanche kii sthiti aur visthaapan nirdhaarit karane key liye sansaadhit kiya jaataa haye. pahala kadam lii gaee chhaviyon kii khamiyon koo thheek karna haye. adhigrahan prakriya key vibhinn charanon seey kaee gadbadi aaa sakati hainh record (daraaren, kharonch, dhool), photography (film anaaj), yaa scanning (dhool, prakashiki, see. see. dee. sensor). 
phir, grove kii sthiti kaa anuman aij detection algorithm kaa upayog karke lagaaya jaataa haye. ack baar kinaaron kaa pataa chalane key baad, chhavi kii sanrachana key baare mein adhik jatil gyaan kii aavashyakta vaale sudhaar kiye jaate hain. sudhaaron key kuchh udaaharan -
dhwani nishkarshan.
antim charan khaanche key visthaapan koo ack shravya sanket mein parivartit karna haye. iss sanket koo baind-paas filter dwara sansaadhit kiya jaataa haye taaki kewal mool recording kii bandwidth praapt kii jaa sakey. kuchh aavritti samanikaran (udaaharan key liye riya) lagu kiye jaate hain.
iss pariyojana kaa uddeshya mool dhwani key jitna sambhav hoe sakey utanaa karib dhwani koo punah praapt karna aur sangrahit karna haye. default roop seey, audio bahaali lagu naheen haye.
toote hue record.
iss pariyojana kaa antim lakshya anyatha hamesha key liye khoye hue record seey dhwani praapt karna haye.
1940 key dashak key kaee record toot gaye hain aur nishchit roop seey khelane yogya naheen hain. parinam ack dilchasp paheli haye.
choonki daraaren laakh key sikudane key kaaran hoti hain, isaliye adhikansh mamalon mein koee bhautik nuksan naheen hotaa haye. iss samasya koo hull karane key liye, navambar 2006 mein, swiss rashtriya dhwani abhilekhagar ney gabert roof foundation dwara vitt poshit ack pariyojana shuru kii. abb taka key parinam utsaahjanak hain. algorithm mool roop seey yeh nirdhaarit karane key liye sanket suvidhaon kaa upayog kartaa haye kii kyaa dou khaanche key hisse sannihit hain yaa naheen.
pariyojana abhee bhee pareekshan satyapan charan mein haye, lekin kuchh dhwani pahale seey hii upalabdh haye.
pranali kii gunavatta.
aadhunik turntable parr punah prasaarit mool record key samaan gunavatta taka pahunchana shayed avaastavik haye. mool roop seey praarambhik prototype mein lagbhag 20 dee. bee., aadhunik pranali kaa sanket-seey-shore anupaat ack achche 78 aar. pee. aim. record key liye lagbhag 19 dee. bee. sthit haye.
laabh aur haani.
apane madhyavarti photographic charan key saath, yeh samadhan abhilekhiya pranaliyon mein paaee jaane vaali kaee mahatvapurna chunautiyon kaa samadhan kartaa haye.
pranali key nuksaanah
punarpraapt file.
iss tarah kii takneekon key saath baramad kii gaee anoothi audio faailon mein, italvi rajneta aur kavi aldo spalichi kaa bhaashan shamil haye.

