Early film reel and sound coding. Four film reel frames from a DeForest Phonofilm 'The Bride' (featuring British comedian George Robey,1869-1954). This film reel was used for the first 'tele-talkie' demonstration in August 1929 by the Scottish engineer and inventor John Logie Baird (1888-1946). The DeForest Phonofilm system recorded sound directly onto the film as parallel lines of varying density resembling a barcode,seen here on the right. A narrow slit of light passed through the variable-density track onto a photo electric cell,and this was then transmitted and converted back into sound. At this point,Baird was still developing his mechanical televion model,here using a Mechau continuous-motion projector,while the images were obtained by scanning with a 30-hole disc | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Terry, Sheila |
Bildgröße: | 2917 px × 6015 px |
Modell-Rechte: | Derzeit liegt noch kein Release vor. Bitte kontaktieren Sie uns vor Verwendung. |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |