"Selectable Output Control" ("SOC") is the remote signaling of home devices by content providers or distributors, to turn off consumer home interfaces on a program-by-program basis. The interface in question would simply not operate for the particular program. It would mean that a consumer who has purchased an HDTV display, and pays for a set-top box or other device with an HDTV output, still might not receive all of the HDTV programs he or she has paid for -- because the interface between the set-top box and the HDTV display has been turned off by remote control. In the long term, imposition of SOC could have the effect of driving from the market any home interface that supports home recording. HRRC has opposed imposition of SOC by law or in any context subject to regulation.
SOC is activated by data "triggers" that ride along with program information when it is sent to the home. FCC Encoding Rules
currently ban SOC use, but the FCC has left the door open
to its use in the future.