Wireless digital audio music system

• US 9,107,000 B2
• Filed: 01/24/2012
• Issued: 08/11/2015
• Est. Priority Date: 12/21/2001
• Status: Expired due to Term

• Current Assignee: One-E-Way
• Original Assignee: One-E-Way
• Inventors: Woolfork, C. Earl
• Primary Examiner(s): Flanders, Andrew C
• Application Number:
  US13/356,949
• Publication Number:
  US 20120128171A1
• Time in Patent Office: 1,295 Days
• Field of Search: 700/94
• US Class Current: 1/1
• 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 mobile wireless digital audio receiver, configured to receive a unique user code and an original audio signal representation in the form of packets, said unique user code used to spread a spectrum of said signal and further configured for independent CDMA communication operation, said receiver independent of the operation of another receiver, said mobile wireless digital audio receiver comprising:

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

a decoder operative to decode the reduced intersymbol interference coding of said original audio signal representation wherein each user has their audio receiver configured to communicate with their own separate audio transmitter, and said receiver virtually free from interference from transmission and reception device signals operating in the shared spectrum.

2. A wireless digital audio headphone for receipt of a unique user code and a digital audio signal representation in the form of a packet, said unique user code used to spread a spectrum of said signal and further configured for independent CDMA communication operation, said headphone independent of the operation of another headphone, said wireless digital audio headphone 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 digital audio signal representation, said packets embedded in the received spread spectrum signal, the captured packets corresponding to the unique user code;

a decoder operative to decode the 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 produce said generated audio output, wherein each user has their audio headphone configured to communicate with their own separate audio transmitter, and said audio virtually free from interference from transmission and reception device signals operating in a shared wireless headphone spectrum.

3. A wireless digital audio headphone comprising:

a digital audio headphone receiver configured to receive an 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 coded wireless spread spectrum communication with a mobile digital audio transmitter, and said user has their headphone configured to communicate with their own 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 original audio signal representation 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 wherein a user has their own transmitter and receiver;

a decoder operative to decode the 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 responsive to the unique user code bit sequence to produce said generated audio output wherein each user has their audio headphone configured to communicate with their own separate audio transmitter, said output virtually free from interference from transmission and reception device signals operating in the shared wireless headphone spectrum.

4. The wireless digital audio headphone of claim 3, wherein the audio output is music.

5. A mobile wireless digital audio receiver, configured to receive a unique user code and an original audio signal representation in the form of packets, said unique user code used to spread the spectrum of said signal and further configured for independent CDMA communication operation, said receiver independent of the operation of another receiver, said mobile 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 original audio signal representation respective to said mobile digital audio receiver, said packets embedded in the received spread spectrum signal, the captured packets corresponding to the unique user code;

a decoder operative to decode the 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 produce said generated audio output, wherein each user has their audio receiver configured to communicate with their own separate audio transmitter, and said audio virtually free from interference from transmission and reception device signals operating in the shared spectrum.

6. A mobile wireless digital audio receiver, configured to receive a unique user code and an original audio signal representation in the form of packets, said unique user code used to spread the spectrum of said signal and further configured for independent CDMA communication operation, said receiver independent of the operation of another receiver, 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 signal representation, 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 produce said generated audio output, wherein each user has their audio receiver configured to communicate with their own separate audio transmitter, and said audio virtually free from interference from transmission and reception device signals operating in a shared spectrum.

7. A wireless digital audio receiver, configured to receive an unique user code and a original audio signal representation, said unique user code used to spread a spectrum of said signal and further configured for independent CDMA communication operation, said receiver independent of the operation of another receiver, said wireless digital audio receiver comprising:

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

a direct conversion module configured to capture the correct bit sequence embedded in the received spread spectrum signal;

a module adapted to produce said original audio signal representation, wherein each user has their audio receiver configured to communicate with their own separate audio transmitter, and said audio virtually free from interference from transmission and reception device signals.

8. A wireless digital coded music audio spread spectrum transmitter operatively coupled to a music audio source and configured to transmit a unique user code and an original audio signal representation in the form of packets, wherein said digital coded music audio transmitter coupled to said music audio source, and configured to be directly communicable with a mobile digital audio spread spectrum receiver, is capable of being moved in any direction during operation, said wireless digital coded audio transmitter comprising:

encoding operative to encode said original audio signal representation to reduce intersymbol interference and aid in lowering signal detection error of said audio representation signal respective to said receiver and mobile said transmitter coupled to said music audio source;

a digital modulator module configured for independent code division multiple access communication operation, wherein each user has their own separate transmitter configured to communicate with their receiver, said transmitter configured to wirelessly transmit said audio to be reproduced virtually free from interference from transmission and reception device signals operating in the wireless digital audio transmitter shared spectrum.

11. The wireless digital audio receiver of claim 8, wherein the spread spectrum receiver module is further configured to utilize differential phase shift keying (DPSK) to demodulate said audio signal representation.

9. A mobile wireless digital audio receiver capable of being moved in any direction during operation and configured to receive a unique user code and an original audio signal representation in the form of packets, said unique user code used to spread a spectrum of said signal and further configured for independent CDMA communication operation, said receiver independent of the operation of another receiver, said wireless digital audio receiver comprising:

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

a decoder operative to decode the reduced intersymbol interference coding of said original audio signal representation, wherein each user has their audio receiver configured to communicate with their own separate audio transmitter, and said audio virtually free from interference from transmission and reception device signals operating in the shared spectrum.

10. A wireless digital coded audio spread spectrum transmitter operatively coupled to a audio source and configured to transmit a unique user code and an original audio signal representation in the form of packets, wherein said digital coded audio transmitter coupled to said audio source, and configured to be directly communicable with a mobile digital audio spread spectrum receiver, is capable of being moved in any direction during operation, said wireless digital coded audio transmitter comprising:

an encoding module operative to encode said original audio signal representation to reduce intersymbol interference and aid in lowering signal detection error of said audio signal representation, said transmitter coupled to said audio source;

a digital modulator module configured for independent code division multiple access communication operation, each user has their own separate transmitter configured to communicate with their receiver, said transmitter configured to wirelessly transmit said audio to be reproduced virtually free from interference from transmission and reception device signals operating in the wireless digital audio transmitter shared spectrum.

12. The wireless digital audio receiver of claim 10, wherein the spread spectrum receiver module is further configured to utilize differential phase shift keying (DPSK) to demodulate said audio signal representation.