Abstract: A system and method for identifying a model of a television set is presented. The system may include a user interaction device including a first communication port configured to transmit operational codes to the television set via a control link, and a second communication port configured to detect audio signals from the television set via a feedback link. The user interaction device may be configured to transmit volume-down codes for television models to the television set to program a volume level of the television set to 0. The user interaction device may be configured to transmit a volume-up code for a first television model. The user interaction device may be configured to identify a model of the television set as the first television model if the user interaction device detects an audio signal on the feedback link following the transmission of the volume-up code for the first television model.

Abstract: A disc processor, such as a printer or a recorder, or a combination processor, has a robotic arm that will pick a compact disc to be processed from a storage stack and move it to a tray associated with the processor. The robotic arm includes a sensor to sense when a disc is in a position to be held in a picker on the arm. The sensor signal can be used for determining whether or not the stack of discs in the input bin is of the correct height; for determining whether or not more than one disc has been picked up by the handler; and also for determining the presence of a disc in the tray or held on the picker arm.