Patent ID: 7920601

Claim:
An apparatus for use in an automotive rear vision system, comprising: an interface unit comprising a reference clock, the interface unit configured to transmit control information using a first serial data stream multiplexed with the reference clock signal over a common transmission line; a remote unit operated with a camera for providing video information where the remote unit is configured to extract the multiplexed reference clock from the first serial data stream utilizing at least one first variable delay element operating as a phase shifting component in a delay locked loop, the remote unit utilizes the extracted multiplexed reference clock as a timing reference for receiving the first serial data stream to provide the control information to the remote camera such that there is a fixed delay until the application of a reset signal; and wherein the total time of a calibration of the at least one first variable delay element is calculated using the bit period of an input signal received over the common transmission line, a period count and the number of possible propagation delay values that are selectable by a control input to the at least one first variable delay element.