Accession Number : AD0164174
Title : Film Recorded Velocity and Dynamic Gain Control Mechanism.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C
Personal Author(s) : McKenchnie,John C.
Report Date : 30 MAY 1972
Pagination or Media Count : 6
Abstract : The patent describes a film drive seed and gain regulated record and playback apparatus which records a control track simultaneously with other parallel data tracks. The control track comprises a series of bars recorded at a predetermined frequency and having density representing the dynamic gain range of the recorded data. After processing, the control track is monitored and variations in density are used to produce playback gain control signals for maintaining system dynamic range. Frequency of the bars during playback is compared with a known frequency by a mixer and a discriminator to provide speed control voltage signals.
Descriptors : (*Recording systems, *Patents), Photographic film, Automatic, Speed regulators, Automatic gain control
Subject Categories : Recording and Playback Devices
Distribution Statement : APPROVED FOR PUBLIC RELEASE