Digital Simulcast - Currently (2007) both digital and analog transmissions are simultaneously broadcasted by many network operators. Cable TV (and other) providers are upgrading their analog signals to the lower bandwidth hogging digital signals in preparation to the all-digital switchover in the States in 2009.

Currently (2007), digital cable is actually a combination of analog and digital signals. The top 80 or so channels are actually still analog and take up the majority of cable bandwidth, while hundreds of extra digital channels, as well as broadband Internet and digital phone service, take up less bandwidth.