The digital television transition is the process in which analog television broadcasting is converted to and replaced by digital television. This primarily involves both TV stations and over-the-air viewers; however it also involves content providers like TV networks, and cable TV conversion to digital cable.
In many countries, a simulcast service is operated where a broadcast is made available to viewers in both analog and digital at the same time. As digital becomes more popular, it is likely that the existing analogue services will be removed. In some cases this has already happened, where a broadcaster has offered incentives to viewers to encourage them to switch to digital. In other cases government policies have been introduced to encourage or force the switchover process, especially with regard to terrestrial broadcasts. Government intervention usually involves providing some funding for broadcasters and, in some cases monetary relief to viewers, to enable a switchover to happen by a given deadline.
In the Philippines, the Philippine Government will terminate all analogue transmissions by Thursday, December 31, 2015. DTT transmissions are currently in test broadcast even before the adoption of ISDB-T in June 2010.
What happen if I did not switch to digital?Edit
You will no longer be able to watch terrestrial broadcast on your television sets unless you acquire a DTV converter box or an ISDB compliant television set.