Wireless digital audio music system

• US 8,131,391 B2
• Filed: 11/05/2010
• Issued: 03/06/2012
• Est. Priority Date: 12/21/2001
• Status: Expired due to Fees

• Current Assignee: One-E-Way
• Original Assignee: One-E-Way
• Inventors: Woolfork, C. Earl
• Primary Examiner(s): Flanders, Andrew C
• Application Number:
  US12/940,747
• Publication Number:
  US 20110044466A1
• Time in Patent Office: 487 Days
• Field of Search: None
• US Class Current: 700/94
• CPC Class Codes: H04R 1/1083 Reduction of ambient noise active noise reduction per se G10K11/175; protective devices for the ear, e.g. providing acoustic protection A61F11/06
• CPC Class Codes: H04R 2420/07 Applications of wireless loudspeakers or wireless microphones
• CPC Class Codes: H04R 5/033 Headphones for stereophonic communication details thereof, e.g. relating to batteries, cables or control elements H04R1/10

Abstract

A wireless digital audio system includes a portable audio source with a digital audio transmitter operatively coupled thereto and an audio receiver operatively coupled to a headphone set. The audio receiver is configured for digital wireless communication with the audio transmitter. The digital audio receiver utilizes fuzzy logic to optimize digital signal processing. Each of the digital audio transmitter and receiver is configured for code division multiple access (CDMA) communication. The wireless digital audio system allows private audio enjoyment without interference from other users of independent wireless digital transmitters and receivers sharing the same space.

Claims

1. A wireless digital audio headphone comprising:

a portable digital audio headphone receiver configured to receive a unique user code bit sequence and a original audio signal representation in the form of packets, said digital audio headphone receiver, capable of mobile operation and configured for direct digital wireless spread spectrum communication with a mobile digital audio transmitter;

a direct conversion module configured to capture packets and the correct bit sequence within the packets aided by lowering signal detection error through reduced intersymbol interference coding of said audio representation signal respective to said headphone receiver and said mobile digital audio transmitter, said packets embedded in the received spread spectrum signal, the captured packets corresponding to the unique user code;

a digital demodulator configured for independent CDMA communication operation;

a decoder operative to decode reduced intersymbol interference coding of original audio signal representation;

a digital-to-analog converter (DAC) generating an audio output of said original audio signal representation; and

a module adapted to reproduce said generated audio output in response to the unique user code bit sequence being recognized, said audio having been wirelessly transmitted and reproduced virtually free from interference from device transmitted signals operating in the wireless headphone spectrum.

2. A wireless digital audio headphone for receipt of a unique user code and a digital audio music representation signal in the form of a packet, said wireless digital audio headphone comprising:

a digital audio receiver, capable of mobile operation, configured for direct digital wireless spread spectrum communication with a mobile digital audio transmitter;

a direct conversion module configured to capture packets and the correct bit sequence within the packets aided by lowering signal detection error through reduced intersymbol interference coding of said audio music representation signal respective to said headphone and said mobile digital audio transmitter, said packets embedded in the received spread spectrum signal, the captured packets corresponding to the unique user code;

a digital demodulator module configured for independent code division multiple access (CDMA) communication operation;

an interleaver to reduce transmission errors; and

a decoder operative to decode the applied reduced intersymbol interference coding of said audio music representation signal; and

a digital-to-analog converter (DAC) generating an audio output of said digital audio music representation signal; and

a module adapted to reproduce said generated audio output, in response to the unique user code bit sequence is being recognized, said audio having been wirelessly transmitted and reproduced virtually free from interference from device transmitted signals operating in the wireless headphone spectrum.

3. A portable wireless digital audio system for digital transmission of an original audio signal representation from a portable audio player to a portable digital audio headphone receiver, said portable wireless digital audio system comprising:

a digital audio transmitter operatively coupled to said portable audio player and transmitting a unique user code bit sequence with said original audio signal representation in packet format, wherein said digital audio transmitter operatively coupled to said audio player is capable of mobile operation, said digital audio transmitter comprising;

a encoder operative to encode said original audio signal representation to reduce intersymbol interference;

a digital modulator module configured for independent CDMA communication operation;

said digital audio transmitter configured for direct digital wireless communication with said portable digital audio headphone receiver, said portable digital audio headphone receiver comprising;

a direct conversion module configured to capture packets and the correct bit sequence within the packets aided by lowering signal detection error through reduced intersymbol interference coding of said audio representation signal respective to said headphone and mobile said digital audio transmitter operatively coupled to said audio player, said packets embedded in the received spread spectrum signal, the captured packets corresponding to the unique user code;

a digital demodulator configured for independent CDMA communication operation;

a decoder operative to decode the applied reduced intersymbol interference coding of said original audio signal representation;

a digital-to-analog converter (DAC) generating an audio output of said original audio signal representation; and

a module adapted to reproduce said generated audio output, said audio having been wirelessly transmitted from said portable audio player and reproduced virtually free from interference from device transmitted signals operating in the wireless digital audio system spectrum.

4. A portable wireless digital audio system for digital transmission of an original audio signal representation from a portable audio player to a digital audio receiver, said portable wireless digital audio system comprising:

a digital audio transmitter operatively coupled to said audio player and transmitting a unique user code with said original audio signal representation in packet format, wherein said digital audio transmitter coupled to said audio player is capable of being moved in any direction during operation, said digital audio transmitter comprising;

an encoder operative to encode said original audio signal representation to reduce intersymbol interference;

a digital modulator module configured for independent code division multiple access (CDMA) communication operation and utilizing differential phase shift keying (DPSK) to modulate said original audio signal representation;

said digital audio receiver capable of being moved in any direction during operation and in direct wireless communication with said digital audio transmitter, said digital audio receiver comprising;

a direct conversion module configured to capture packets and the correct bit sequence within the packets aided by lowering signal detection error through reduced intersymbol interference coding of said audio representation signal respective to said mobile digital audio receiver and mobile said digital audio transmitter operatively coupled to said audio player, said packets embedded in the received spread spectrum signal, the captured packets corresponding to the unique user code;

a digital demodulator configured for independent CDMA communication operation;

a decoder operative to decode the applied reduced inter-symbol interference coding of said original audio signal representation;

a digital-to-analog converter generating an audio output of said original audio signal representation; and

a module adapted to reproduce said generated audio output, said audio having been wirelessly transmitted from said audio player virtually free from interference from device transmitted signals operating in the wireless digital audio system spectrum.

5. A wireless digital audio receiver, capable of mobile operation, configured to receive a unique user code and a original audio signal representation in the form of packets, the wireless digital audio receiver further configured to be directly communicable with a mobile digital audio transmitter, said wireless digital audio receiver comprising:

a direct conversion module configured to capture packets and the correct bit sequence within the packets aided by lowering signal detection error through reduced intersymbol interference coding of said audio representation signal respective to mobile said digital audio receiver and said mobile digital audio transmitter, said packets embedded in a received spread spectrum signal, the captured packets corresponding to the unique user code;

a digital demodulator configured for independent code division multiple access communication operation;

a decoder operative to decode reduced intersymbol interference coding of said original audio signal representation;

a digital-to-analog converter (DAC) generating an audio output of said original audio signal representation; and

a module adapted to reproduce said generated audio output, said audio having been wirelessly transmitted from a portable audio player virtually free from interference from device transmitted signals operating in the digital wireless audio receiver spectrum.

6. A wireless digital audio headphone for receipt of a unique user code and a digital audio music representation signal in the form of a packet, said wireless digital audio headphone comprising:

a mobile digital audio receiver configured for direct digital wireless communication with a mobile digital audio transmitter;

a direct conversion module configured to capture packets and the correct bit sequence within the packets aided by lowering signal detection error through reduced intersymbol interference coding of said audio representation signal respective to said headphone and said mobile digital audio transmitter, said packets embedded in the received spread spectrum signal, the captured packets corresponding to the unique user code;

a digital demodulator module configured for independent code division multiple access (CDMA) communication operation;

a decoder operative to decode reduced intersymbol interference coding of said original audio signal representation; and

a digital-to-analog converter (DAC) generating an audio output of said digital audio music representation signal; and

a module adapted to reproduce said generated audio output, said audio having been wirelessly transmitted and reproduced virtually free from interference from device transmitted signals operating in the wireless headphone spectrum.

7. A mobile wireless digital audio receiver, configured to receive a unique user code and a original audio signal representation in the form of packets, said unique user code configured to spread the spectrum of said signal and further configured for independent communication operation, the wireless digital audio receiver further configured to be directly communicable with a mobile digital audio transmitter, said mobile wireless digital audio receiver comprising:

fuzzy set membership functionality to enhance detection of said unique user code;

a direct conversion module configured to capture packets and the correct bit sequence within the packets aided by lowering signal detection error through reduced intersymbol interference coding of said audio representation signal respective to said mobile digital audio receiver and said mobile digital audio transmitter, said packets embedded in the received spread spectrum signal, the captured packets corresponding to the unique user code;

a decoder operative to decode reduced intersymbol interference coding of said original audio signal representation;

a digital-to-analog converter generating an audio output of said original audio signal representation; and

a module adapted to reproduce said generated audio output, said audio having been wirelessly transmitted from an audio player and reproduced virtually free from interference from device transmitted signals operating in the wireless digital audio receiver spectrum.

8. A wireless digital audio headphone for receipt of a unique user code and a digital audio representation signal in the form of a packet, said unique user code configured to spread the spectrum of said signal and further configured for independent communication operation, the wireless digital audio headphone further configured to be directly communicable with a mobile digital audio transmitter, said wireless digital audio headphone comprising:

fuzzy set membership functionality to enhance detection of said unique user code;

a direct conversion module configured to capture packets and the correct bit sequence within the packets aided by lowering signal detection error through reduced intersymbol interference coding of said audio representation signal respective to said headphone and said mobile digital audio transmitter, said packets embedded in the received spread spectrum signal, the captured packets corresponding to the unique user code;

a decoder operative to decode reduced intersymbol interference coding of said original audio signal representation;

a digital-to-analog converter generating an audio output of said original audio signal representation; and

a module adapted to reproduce said generated audio output, said audio having been wirelessly transmitted from an audio player and reproduced virtually free from interference from device transmitted signals operating in the wireless headphone spectrum.

9. A mobile wireless digital audio receiver, configured to receive a unique user code and a original audio music signal representation in the form of packets, said unique user code configured to spread the spectrum of said music signal and further configured for independent communication operation, the wireless digital audio receiver further configured to be directly communicable with a mobile digital audio transmitter, said mobile wireless digital audio receiver comprising:

fuzzy set membership functionality to enhance detection of said unique user code;

a direct conversion module configured to capture packets and the correct bit sequence within the packets aided by lowering signal detection error through reduced intersymbol interference coding of said audio music representation signal respective to said mobile digital audio receiver and said mobile digital audio transmitter, said packets embedded in the received spread spectrum signal, the captured packets corresponding to the unique user code;

a decoder operative to decode reduced intersymbol interference coding of said original audio signal representation;

a digital-to-analog converter generating an audio output of said original audio signal representation; and

a module adapted to reproduce said generated audio output, said audio having been wirelessly transmitted from an audio player and reproduced virtually free from interference from device transmitted signals operating in the wireless digital audio receiver spectrum.

10. A wireless digital audio headphone for receipt of a unique user code and a digital audio representation signal in the form of a packet, said wireless digital audio headphone comprising:

a mobile digital audio receiver configured for direct digital wireless spread spectrum communication with a mobile digital audio transmitter;

a direct conversion module configured to capture packets and the correct bit sequence within the packets aided by lowering signal detection error through reduced intersymbol interference coding of said audio representation signal respective to said headphone and said mobile digital audio transmitter, said packets embedded in the received spread spectrum signal, the captured packets corresponding to the unique user code;

a digital demodulator module configured for independent code division multiple access (CDMA) communication operation;

a decoder operative to decode reduced intersymbol interference coding of said original audio signal representation; and

a digital-to-analog converter generating an audio output of said digital audio representation signal; and

a module adapted to reproduce said generated audio output, said audio having been wirelessly transmitted and reproduced virtually free from interference from device transmitted signals operating in the wireless headphone spectrum.