How do Intermediate AV (IAV) devices or Full AV (FAV) devices get access to a particular device?
DCMs (Device Control Modules) are installable Software Elements on an IAV or FAV that are intended to control specific devices (HAVi or non-HAVi devices). There are several methods to access a DCM . (HAVi does not require or mandate any specific procedure). Some of the possible approaches are: • DCMs may be embedded in an IAV or FAV at the time of manufacture. This will most likely include a DCM for the device to make itself controllable by other HAVi devices. (For example, a set-top box could contain a DCM that implements the HAVi defined tuner APIs to enable other HAVi devices to select a TV program). However, a HAVi device may also contain DCMs for a variety of devices other than itself. The vendor would determine whether or not a HAVi device had this capability. • DCMs may be distributed on removable media (diskettes, CD-ROM, etc.) allowing the consumer to install DCMs onto HAVi devices. • HAVi devices may download and install DCMs from a web site. This requires that the HAVi devic
