Real-time digital video multiplexer synchronisation implementation with CPLD

Many video applications in security areas such as close circuit television (CCTV) require multiple video channels which must be multiplexed into a single video streanm. The industry can only afford to have a few frames or fields per camera. This paper emphasises on a novel hardware design using an algorithm for synchronising the analogue video inputs. Therefore the proposed multiplexer system is able to achieve a constant stream of 50 digital video fields per second using a CPLD (Complex Programmable Logic Device) for 625/50 video system.