Method and apparatus for processing a composite synchronizing signal

An apparatus for providing a sequence of output pulses, the apparatus comprising:

• a pulse generator having an input for receiving the first sequence of pulses, and an output for providing a second sequence of pulses, wherein the second sequence of pulses is generated from the received first sequence of pulses;
• and
• a switch for receiving a first sequence of pulses and coupled to the output of the pulse generator for receiving the second sequence of pulses, the switch coupled to an input select signal and an output, wherein the switch couples the first sequence of pulses to the output in response to the input select signal indicating the first sequence of pulses is not terminated, and couples the second sequence of pulses from the pulse generator to the output in response to the input select signal indicating the first sequence of pulses is terminated.

A method in a video monitor for providing an output sequence of horizontal synchronising pulses, the method comprising the steps of:

• (a) providing a sequence of received horizontal synchronising pulses to an output;
• (b) receiving an indication that the received horizontal synchronising pulses are terminated;
• (c) in response to step (b), providing pseudo horizontal synchronising pulses to the output, wherein the pseudo horizontal synchronising pulses are generated from the received horizontal synchronising pulses.