phonovision

graamaphon recordukalil oru mechanical television signal record cheiyunnathinulla aashaya formaattinteyum pareekshanatthinteyum thelivaanu phonovision. 1920 kalude avasaanathil landanil scotish television pioneer joonn logi baird aanu eee formet vikasippichath. viidiyoo record cheyyuka mathramalla, athu samanvayippichu record cheyyuka ennathaayirunnu lakshyam, kaaranam baird "phonovisor" ennu vilicha vilakuranja playback upakaranathil ninnu playback cheyyaan uddeshichirunnu. 
saankethika vivarangal.
television scanning samvidaanam, oru nipco disk, record maasttaring tentable enniva yaanthrikamaayi bandhippikkunna prakriya ulppedunnu. nipco disk scanneril ninnulla viidiyoo signal vipuleekarikkukayum tentebilinte cutting stylasumaayi bandhippikkukayum cheythu. eee prakriya pravarthanakshamamaakkunnathi bairdinu niravadhi vittuveezhchakal nadathendivannu, avayil secondil anchu frameukal maathram enna chitra nirakk upayogichu. bairdinte mattu pareekshanangalil ninnu vyathyasthamayi (stereoscopy, kalar, infra-redu naitt-vision ennivayulppede), chithrangalude playback parasyamaayi pradarshippichathinu thelivukalonnumilla. phalangal akkaalat oru parajayamaayi kanakkakkappettu, koodaathe baird niravadhi discukal myoosiyangaludeyum priyappetta kambani amgangaludeyum kaikalil upekshichu. 
saankethika prasnangal undaayirunnittum, oru television signal record cheiyunnathinulla ettavum aadyakaala maarggamaayi phonovision thudarunnu. orarthathil, 1970 kalude thudakkathile europian teldec sisttam, selectivision ennariyappedunna arcaude kappaasittans electronic disk thudangiya mattu disk adhishtitha samvidaanangalude poorvvikanaayi ithine kaanaan kazhiyum.
charithram.
athijeevichirikkunna ettavum pazhaya phonovision disk, baird pareekshanangalkkayi upayogicha "stookki bill" dummy hedukalilonnu chithreekarikkunnu, ithu 1927 septambar 10 nuu record cheyyappettu. oru manushyamukhatthinte aadyakaala recording vaali folkkukaludethaanu, 1928 januvari 10 nuu nirmikkappettu. 1928 march 28 nuu, "miss pounsford" enna recording nirmikkappettu, ithu pala tharatthil pareekshanathmaka discukalil ettavum mikachathaanu. mikachathaanu, avarude bandhukkal mabel pounsfordine aadyakaala television thaaramaayi thiricharinju.
1982 muthal scotish imej prosessing vidagthanaaya donald eph. phonovision discukalil record cheytha viidiyoo pidichedukkunnathinum punasthaapikkunnathinum emclean vikasippicha software. lalithamaaya playback anuvadikkunnathinu aavashyamaaya mechanical linkej kaaranam recordingukal nirmmikkumbol gurutharamaaya prasnangal undayathaayi emclean recordingukalude vishakalanam velippeduthi. software vazhiyaan prasnangal pradhaanamaayum pariharichathu, thathfalamaayundaakunna chithrangal akkaalat bairdinte laborattarikalil kaanunnathinekkaal valare mikacha nilavaaramulla chithram avatharippikkunnu.
bairdinte parisodhanakal mathramalla atharam recordingukal nilanilkkunnath. 1933 eprilil, oru aadyakaala television aaraadhakan oru silvatton hoome recording outtputtu upayogichu, ithu oru signal-modulated groovine oru aluminium diskilekku indant cheyyukayum shabdam recorducheyyan uddeshikkukayum cheythu, secondil thalsamaya prakshepanatthil yadhaartha bbc 30-line 12.5 frameukalil ninnu viidiyoo signal pidichedukkunnathinu. ariyappedunna disk ekadesham naalu minitt viidiyoo anubandha audiyo illaathe samrakshikkunnu. ithu digitalaayi punasthaapikkukayum ellah mechanical television prograamingukalum valare lalithavum sthiravum cheria vinoda moolyavum vaagdaanam cheiyunnuvenna parambaraagatha jnjaanathe nishedhikkunna uyarnna thalatthilulla ulppaadana moolyangal velippeduthukayum cheiyunnu.

