US 12,035,065 B2
Control and synchronization in video production
Kevin Rockel, Ottawa (CA); Michel Paquin, Ashton (CA); and David Rooney, Carp (CA)
Assigned to Ross Video Limited, Iroquois (CA)
Filed by Ross Video Limited, Iroquois (CA)
Filed on Jun. 14, 2022, as Appl. No. 17/840,128.
Claims priority of provisional application 63/212,291, filed on Jun. 18, 2021.
Prior Publication US 2022/0407984 A1, Dec. 22, 2022
Int. Cl. H04N 5/067 (2006.01); H04N 5/05 (2006.01); H04N 21/242 (2011.01); H04N 21/43 (2011.01)
CPC H04N 5/067 (2013.01) [H04N 5/05 (2013.01); H04N 21/242 (2013.01); H04N 21/4307 (2013.01)] 24 Claims
OG exemplary drawing
 
1. An apparatus comprising:
an index generator to generate an index value that is periodically incremented;
a communication interface to enable communication with a video production control system node;
a central synchronization element, coupled to the index generator and to the communication interface, to:
transmit, to the video production control system node through the communication interface, first messages comprising respective current index values generated by the index generator;
determine a round-trip message time, associated with the video production control system node, based on the transmitted first messages and reflections of the first messages received from the video production control system node through the communication interface; and
transmit, to the video production control system node through the communication interface, a second message comprising an instruction for execution of a task at a target execution time, wherein the central synchronization element is configured to transmit the second message at a time, in advance of the target execution time, that is based on the round-trip message time.