Time-keeping system and method for synchronizing independent recordings of a live performance in post-recording editing
AssigneeTrimble Navigation Limited
InventorsArthur Woo, David S. Sprague
Life of this patent
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Abstract
A GPS receiver comprises a data output port for communicating time code information formatted according to standards published by the Society of Motion Picture and Television Engineer (SMPTE). Such time code information is input to independent sound, film and video recorders at a performance event to create tracks on each recording for re-synchronizing the pictures and sounds in post-performance editing.
Claims12
A method for synchronizing sound and picture recordings from a plurality of independent continuous recording devices at a common event, the method comprising the steps of:
- receiving navigation satellite signals at a first location proximate to a first continuous recording device with a first navigation satellite receiver at a common event;
- deriving from said navigation satellite signals a first date and time code information with said first navigation satellite receiver;
- and
- tagging a first continuous recording generated by said first continuous recording device with said date and time code information at one of a motion picture video frame repetition rate.
A master clock for film and video production equipment, comprising:
- a navigation satellite receiver for receiving signals from a constellation of navigation satellites with atomic clocks having system-wide synchronization and with digital signal processing (DSP) means for accumulating and averaging code epochs which occur each millisecond in time providing for a precision time-base output;
- and
- time-period-to-frequency conversion means connected to said precision time-base output and having a precision clock output for synchronizing film and video equipment at frame repetition rate intervals.
A video sync-generator for stable frame reference control, comprising:
- a navigation satellite receiver for receiving signals from a constellation of navigation satellites with atomic clocks having system-wide synchronization and with digital signal processing means for accumulating and averaging code epochs which occur each millisecond in time providing for a precision time-base output;
- processing means for deciphering date and time information broadcast over said orbiting navigation satellite transmissions;
- and
- video sync-generator output means connected to the navigation satellite receiver and the processing means providing for a stable frame reference control output signal to drive video cameras and recorders at frame repetition rate intervals.
A time-keeping system for synchronizing sound and picture recordings from a plurality of independent recording devices at a shared performance, comprising:
- a first navigation satellite receiver with digital signal processing (DSP) means for deciphering a date and time-of-day information broadcast by a constellation of orbiting navigation satellite having atomic clocks synchronized system-wide time, and time code output generation means connected to the DSP for formatting a first continuous output of digital time codes corresponding to said synchronized system-wide time;
- and
- first continuous recording means connected to the first navigation satellite receiver for recording said first continuous output of formatted digital time codes on a first continuous recording medium of at least one of movie film, video tape and audio tape.
Dependencies are inferred from the claim text.