Multiple channel wireless communication system
View Patent ↗A wireless headphone device may include a receiver for receiving a wireless digital signal containing a plurality of digital audio streams combined with control codes according to a predetermined format, a manually operated selector switch for selecting one or more of the plurality of digital audio streams to be produced as audio for the user, and a decoder for extracting the selected audio streams from the received signal in accordance with the predetermined format and for responding to the control codes in the received signal to perform predetermined functions. A wireless headphone system may include a receiver, responsive to a transmitted digital bitstream in which a plurality of audio input channels are combined with control data, for decoding and demultiplexing the digital bitstream, a manual selector switch for selecting one or more of the audio input channels to be decoded and demultiplexed by the receiver from the transmitted encoded digital bitstream; and a sound producing device for selectively reproducing the one or more selected audio channels in accordance with the control data.
1. A wireless headphone device, comprising:
a receiver for receiving a wireless digital infra-red signal containing a plurality of digital audio streams combined with control codes according to a predetermined format of the infra-red signal;
a manually operated selector switch in the receiver for selecting one or more of the plurality of digital audio streams to be produced as audio for the user; and,
a decoder for extracting by the receiver the selected audio streams from the received signal in accordance with the predetermined format and for responding to the control codes in the received signal to perform predetermined functions.
2. The device of claim 1 , wherein the decoder comprises: an error detector responsive to the control codes in the received signal to detect errors in the received signal.
3. The device of claim 1 , wherein the decoder comprises: an error detector responsive to the control codes in the received signal to correct errors in the received signal.
4. The device of claim 1 , wherein the decoder further comprises: a timer responsive to the received signal to turn the wireless headphone device off when at least portions of the received signals are not received during a fixed time period.
5. The device of claim 1 , wherein the decoder comprises: a decoder for responding to the control codes in the received signal to power the device down and power the device up.
6. The device of claim 1 , wherein the decoder comprises: a decoder for responding to the control codes in the received signal to identify the received signal.
7. The device of claim 1 , wherein the decoder comprises: a decoder for responding to the control codes in the received signal to identify a source of the received signal.
8. The device of claim 7 , wherein the decoder comprises: a decoder for responding to the control codes in the received signal to enable operation of the wireless headphone device upon identification of a predetermined source.
9. The device of claim 1 , wherein the decoder comprises: a decoder for responding to the control codes in the received signal to identify the audio streams in the received signal.
10. The device of claim 1 , wherein the decoder comprises: a decoder for responding to the control codes in the received signal to control the operation of the selector switch for selection of the digital audio streams available in the received signal.
11. The device of claim 1 , wherein the decoder comprises: a demultiplexer to demultiplex a pulse position modulated signal in the received signal.
12. The device of claim 1 , wherein the decoder comprises: a decoder for extracting synchronization information from the received signal to synchronize the decoder with a source of the received signal.
13. The device of claim 12 , wherein the decoder further comprises: a crystal oscillator selected to oscillate at a frequency of the source of the signal; and a pulse injector for responding to the received signal by generating synchronization pulses for the crystal oscillator to synchronize the crystal oscillator to the frequency of the signal source.
14. A wireless headphone system, comprising:
a receiver, responsive to a transmitted digital bitstream in which a plurality of audio input channels are combined with control data according to a predetermined format, for decoding and demultiplexing the digital bitstream, the receiver including:
a manual selector switch for selecting one or more of the audio input channels to be decoded and demultiplexed by the receiver from the transmitted encoded digital bitstream;
and a sound producing device for selectively reproducing the one or more selected audio channels in accordance with the control data.
15. The invention of claim 14 further comprising: an auto-off circuit automatically disconnecting power from the receiver when reproducible data from none of the audio input channels has been received for a predetermined time period.
16. The invention of claim 14 , wherein the receiver further comprises: a comparator for comparing segments in different fixed positions within the bitstream to detect an error event.
17. The invention of claim 16 , further comprising: an error correcting section responsive to the detection of an error event to correct an error in the bitstream.
18. The invention of claim 14 , wherein the receiver further comprises: a circuit for muting the selected audio input channels in response to a predetermined number of error events.
19. The invention of claim 14 , wherein the receiver further comprises: a receiver section for extracting a plurality of fixed sequences of data representing audio from at least one audio input channels from the digital bitstream and for identifying control data between the sequences.
20. The invention of claim 14 wherein the receiver section further comprises: a synchronization detector for detecting synchronization signals in the digital bitstream for synchronizing the decoding of the digital bitstream with the transmission of that bitstream.