Patent ID: 7509180
Filing Date: 2009-03-24
Classification: G06F,G11B,H04H

Abstract:
1. A loudspeaker system comprising: a circuit to receive audio material and an authorization of whether a loudspeaker is authorized to play the audio material, wherein the audio material is represented by a loudspeaker audio signal and the authorization is represented by a speaker enabling signal, wherein the audio signal and the speaker enabling signal comprise a common digital signal; the loudspeaker to play the audio material if the authorization indicates that the loudspeaker is authorized to play the audio material, wherein the authorization depends upon an algorithm comprising at least one of an identity of the loudspeaker, an identity of a human operator, a characteristic of the human operator, an identity of the audio material to be played by the loudspeaker, a characteristic of the audio material to be played by the loudspeaker, a time, data stored in a memory, or data received from a network; a system to generate a sensed sound signal representing the audio material played by the loudspeaker, wherein the system senses a physical characteristic that is representative of the audio material played by the loudspeaker, wherein the sensed sound signal is presented to the network; and a processor system to receive the sensed signal and determine whether the loudspeaker generally played the received audio material.