Patent ID: 6609039
Filing Date: 2003-08-19
Classification: H04H

Abstract:
A digital audio signal processing and distribution sub-assembly unit device for satellite radio digital radio receivers, for extraction of COFDM/OFDM or CDM access protocol audio channel digital signals and simultaneous re-transmission to multiple user headsets, comprising;digital signal processing means to extract from said radio receivers digital audio data from each broadcast channel and transfer said digital audio data to storage buffers for subsequent conversion to analog audio signals and transfer to individual users headsets; software means to extract, transfer and control the processing of said digital audio data, wherein said digital signal processing means and said software means to extract from said radio receivers digital audio data from each broadcast channel includes baseband processing and other parallel-to-serial data extraction techniques for demultiplexing digital data that were created using frequency diversity algorithms used to process multiple audio channel data prior to broadcast transmission; user port storage buffer means for temporary storage of extracted user selected digital audio data prior to conversion to said analog audio signals; digital to analog converter means to convert said digital audio data to said analog audio signals; industry standard computer bus architecture means for transferring said digital audio data to and from said storage, processing and digital processing means; channel selection by remote means to allow each user to select said audio channel signals desired to be heard; user audio headset means to allow a user to listen to said selected audio channel in the presence of other users without interference; and means to transfer said audio channel signals, from said digital radio receiver containing said sub-assembly, to said user audio headsets.