Patent ID: 8483855
Filing Date: 2013-07-09
Classification: G11B,H04L,H04R

Abstract:
1. Method for the playback of digitalized audio signals that are transmitted packet-oriented from a signal source to at least one signal sink in a motor vehicle by means of an asynchronous bus system, wherein connected upstream of the signal sink is an audio-signal processing unit demonstrating a data rate converter, which is fed the digitalized audio signals destined for the signal sink from a control unit over a data line by means of a first data interface of the control unit, the control unit has a second data interface for the connection to the asynchronous bus system and for receiving the digitalized audio signals, a data buffer and a controller are arranged within the control unit, wherein the controller outputs a control signal to an oscillator interfaced to a logic unit, and the logic unit generates at least a first and a second clocking signal based on a clocking signal generated by the oscillator, the first clocking signal being fed to the first data interface and the second clocking signal being fed to the data rate converter, and the controller changes the clocking signal through the control signal, causing the logic unit to change the clocking rates of the first and second clocking signal, which provide the clocking rates for the first interface and the data rate converter, so that the data rate at which the first interface reads the data from the data buffer and at which data are transmitted to the data rate converter of the audio signal processing unit over the data line, and the data rate of the data rate converter, are controlled by the controller as a function of the filling level of the data buffer.