Accession Number : ADP009129

Title :   TIme Synchronized Video Systems,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION GREENBELT MD GODDARD SPACE FLIG HT CENTER

Personal Author(s) : Burnett, Ron

Report Date : 02 DEC 1993

Pagination or Media Count : 4

Abstract : The idea of synchronizing multiple video recordings to some type of 'range' time has been tried to varying degrees of success in the past. Combining this requirement with existing time code standards (SMPTE) and the new innovations in desktop multi-media however, have afforded an opportunity to increase the flexibility and usefulness of such efforts without adding costs over the traditional data recording and reduction systems. The concept described can use IRIG, GPS or a battery backed internal clock as the master time source. By converting that time source to Vertical Interval Time Code or Longitudinal Time Code, both in accordance with the SMPTE standards, the user will obtain a tape that contains machine/computer readable time code suitable for use with editing equipment that is available off-the-shelf. Accuracy on playback is then determined by the playback system chosen by the user. Accuracies of + or 2 frames are common among inexpensive systems and complete frame accuracy is more a matter of the users' budget than the capability of the recording system.

Descriptors :   *RECORDING SYSTEMS, *SYNCHRONISM, *TIME STANDARDS, ACCURACY, CLOCKS, COMPUTERS, COSTS, INTERNAL, INTERVALS, OFF THE SHELF EQUIPMENT, PLAYBACK, REDUCTION, REQUIREMENTS, STANDARDS, TIME, CALIBRATION, VIDEO RECORDING.

Subject Categories : Recording and Playback Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE