Patent ID: 8259952
Filing Date: 2012-09-04
Classification: H04B

Abstract:
1. A vehicle entertainment system having ground noise reduction comprising: an input comprising a left channel connection, a right channel connection, and a common connection characterized as a reference for the left channel connection and the right channel connection; a signal source comprising a left channel output coupled to the left channel connection, a right channel output coupled to the right channel connection, and a common return coupled to the common connection, wherein said common return is characterized as a reference for the left channel output and the right channel output; a ground point at a location on the vehicle; a noise detector configured to determine a noise signal value of a noise signal at the common connection; and a ground switch module comprising a switch configured to alternately change a switch state between a coupled state that couples the common connection to the ground point, and a decoupled state that decouples the common connection from the ground point, wherein if the noise signal value is above a threshold, the ground switch module changes the switch state.