External amplifier interface

An interface configured to allow desired cooperation between an OEM or aftermarket head unit and an external power amplifier. The inventive interface receives an audio input signal from the head unit. It also monitors the vehicle's CAN bus. The interface detects CAN bus commands that cause the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Jones William H, Daly Charles David
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CALCULATING COMPUTING CONTROL OF AMPLIFICATION COUNTING DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PHYSICS PUBLIC ADDRESS SYSTEMS TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION WIRELESS COMMUNICATIONS NETWORKS
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Beschreibung
Zusammenfassung:	An interface configured to allow desired cooperation between an OEM or aftermarket head unit and an external power amplifier. The inventive interface receives an audio input signal from the head unit. It also monitors the vehicle's CAN bus. The interface detects CAN bus commands that cause the head unit to play an audio notification signal such as a "chime." Upon detecting such a CAN bus command, the inventive interface selectively adjusts the output level so that the user hears the audio notification signal at an appropriate volume.