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About: RCA Photophone     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatRCABrands, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: Thingcompanyschema:Organizationdul:Agentdul:SocialPersonagentwikidata:Q24229398OrganizationBusiness enterpriseyago:WikicatMovieFilmFormatsyago:Abstraction100002137yago:Communication100033020yago:Format106636806yago:Information106634376yago:LanguageUnit106284225yago:Message106598915yago:Name106333653yago:Part113809207yago:Relation100031921musical artistorganisationyago:TradeName106845599yago:WikicatRCABrands New Facet based on Instances of this Class

RCA Photophone was the trade name given to one of four major competing technologies that emerged in the American film industry in the late 1920s for synchronizing electrically recorded audio to a motion picture image. RCA Photophone was an optical sound, "variable-area" film exposure system, in which the modulated area (width) corresponded to the waveform of the audio signal. The three other major technologies were the Warner Bros. Vitaphone sound-on-disc system, as well as two "variable-density" sound-on-film systems, Lee De Forest's Phonofilm, and Fox-Case's Movietone.