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Concept
Video feedback
Résumé
Video feedback is the process that starts and continues when a video camera is pointed at its own playback video monitor. The loop delay from camera to display back to camera is at least one video frame time, due to the input and output scanning processes; it can be more if there is more processing in the loop.
First discovered shortly after Charlie Ginsburg invented the first video recorder for Ampex in 1956, video feedback was considered a nuisance and unwanted noise. Technicians and studio camera operators were chastised for allowing a video camera to see its own monitor as the overload of self-amplified video signal caused significant problems with the 1950s video pickup, often ruining the pickup. It could also cause screen burn-in on television screens and monitors of the time as well, by generating static brightly illuminated display patterns.
In the 1960s early examples of video feedback art became introduced into the psychedelic art scene in New York City. Nam June Paik is often cited as the first video artist; he had clips of video feedback on display in New York City at the Greenwich Cafe in the mid 1960s.
Early video feedback works were produced by media artist experimenters on the East and West Coasts of North America in the late 1960s and early 1970s. Video feedback artists Steina and Woody Vasulka, with Richard Lowenberg and others, formed The Kitchen, which was located in the kitchen of a broken-down hotel in lower Manhattan; while Skip Sweeney and others founded Video Free America in San Francisco, to nurture their video art and feedback experiments.
David Sohn mentions video feedback in his 1970 book Film, the Creative Eye. This book was part of the base curriculum for Richard Lederer of St. Paul's School in Concord, New Hampshire, when he made video feedback part of an English curriculum in his 1970s course Creative Eye in Film. Several students in this class participated regularly in the making and recording of video feedback.
Source officielle
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