Wireless digital audio music system

• US 9,282,396 B2
• Filed: 02/25/2013
• Issued: 03/08/2016
• 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:
  US13/775,754
• Publication Number:
  US 20140241543A1
• Time in Patent Office: 1,107 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 1/7097 Interference-related aspects
• CPC Class Codes: H04H 20/61 for local area broadcast, e.g. instore broadcast
• CPC Class Codes: H04M 1/6066 including a wireless connection
• 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 portable wireless digital audio system for digital transmission of an original audio signal representation from a portable audio source to a digital audio headphone, said audio signal representation representative of audio from said portable audio source, said portable wireless digital audio system comprising:

a portable digital audio spread spectrum transmitter configured to couple to said portable audio source and transmitting a unique user code bit sequence with said original audio signal representation in packet format, said digital audio spread spectrum transmitter comprising;

an encoder operative to encode said original audio signal representation to reduce intersymbol interference and lowering signal detection error of said audio signal representation respective to said digital audio headphone and said digital audio spread spectrum transmitter; and

a digital modulator configured for independent code division multiple access (CDMA) communication operation wherein said portable digital audio spread spectrum transmitter is in direct communication with said digital audio headphone, said digital audio headphone comprising;

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

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 audio output, wherein each user has their headphone configured to communicate with their own separate digital audio spread spectrum transmitter, said audio having been wirelessly transmitted from said portable audio source through the digital audio spread spectrum transmitter configured to communicate with the headphone such that signals not originating from said portable digital audio spread spectrum transmitter are inaudible while operating in the portable wireless digital audio spread spectrum transmitter spectrum.

3. The portable wireless digital audio system of claim 1, wherein said portable digital audio spread spectrum transmitter comprising a differential phase shift keying (DPSK) implementation and a digital modulator implementation for spread spectrum transmission.

4. The portable wireless digital audio system of claim 1, wherein said digital audio headphone comprising a differential phase shift keying (DPSK) implementation and a digital demodulator implementation for spread spectrum reception.

2. A wireless digital audio headphone comprising:

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

a direct conversion module configured to capture packets and the correct bit sequence within the packets and lowering signal detection error through reduced intersymbol interference coding of said audio signal representation respective to said headphone spread spectrum receiver and said mobile digital audio spread spectrum 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 said audio signal representation;

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

a module adapted to reproduce said audio output in response to the unique user code bit sequence being recognized, wherein each user has their spread spectrum headphone receiver configured to communicate with their own separate spread spectrum transmitter, said audio having been wirelessly transmitted and reproduced such that signals not originating from the mobile digital audio spread spectrum transmitter, configured to communicate with the headphone receiver, are inaudible while operating in the mobile wireless digital audio spread spectrum transmitter spectrum.

5. The wireless digital audio headphone of claim 2, wherein said portable digital audio headphone spread spectrum receiver comprising a differential phase shift keying (DPSK) implementation and a digital demodulator implementation for spread spectrum reception.

6. A portable wireless digital audio system for digital transmission of an audio signal representation from a portable audio player to a portable digital audio headphone spread spectrum receiver, said audio signal representation representative of audio from said portable audio player, said portable wireless digital audio system comprising:

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

an encoder operative to encode said audio signal representation to reduce intersymbol interference and lowering signal detection error of said audio signal representation respective to headphone spread spectrum receiver and mobile digital audio spread spectrum transmitter; and

a digital modulator configured for independent CDMA communication operation wherein the digital audio spread spectrum transmitter is directly communicable with said portable digital audio headphone spread spectrum receiver, said portable digital audio headphone spread spectrum receiver comprising;

a direct conversion module configured to capture packets and the correct bit sequence within the packets and lowering signal detection error through reduced intersymbol interference coding of said audio representation signal respective to said headphone and mobile said digital audio spread spectrum 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 audio signal representation;

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

a module adapted to reproduce said generated audio output, wherein each user has their headphone configured to communicate with their own separate spread spectrum transmitter, said audio having been wirelessly transmitted from said portable audio player and reproduced such that signals not originating from the mobile digital audio spread spectrum transmitter, configured to communicate with the headphone, are inaudible while operating in the mobile wireless digital audio spread spectrum transmitter spectrum.

7. The portable wireless digital audio system of claim 6, wherein said digital audio spread spectrum transmitter comprising a differential phase shift keying (DPSK) implementation and a digital modulator implementation for spread spectrum transmission.

8. The portable wireless digital audio system of claim 6, wherein said portable digital audio headphone spread spectrum receiver comprising a differential phase shift keying (DPSK) implementation and a digital demodulator implementation for spread spectrum reception.

9. A portable wireless digital audio system for digital transmission of an audio signal representation from a portable audio player to a portable digital audio spread spectrum receiver, said audio signal representation representative of audio from said portable audio player, said portable wireless digital audio system comprising;

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

an encoder operative to encode said audio signal representation to reduce intersymbol interference and lowering signal detection error of said audio signal representation respective to mobile spread spectrum receiver and mobile digital audio spread spectrum transmitter;

a digital modulator configured for independent CDMA communication operation and a differential phase shift keying (DPSK) modulator to modulate said audio signal representation wherein the digital audio spread spectrum receiver is capable of mobile operation and in direct communication with said mobile digital audio spread spectrum transmitter, said mobile digital audio spread spectrum receiver comprising;

a direct conversion module configured to capture packets and the correct bit sequence within the packets and lowering signal detection error through reduced intersymbol interference coding of said audio representation signal respective to said mobile digital audio spread spectrum receiver and said mobile 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 audio signal representation;

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

and a module adapted to reproduce said generated audio output, wherein each user has their spread spectrum receiver configured to communicate with their own separate spread spectrum transmitter, said audio having been wirelessly transmitted from said portable audio player and reproduced such that signals not originating from the mobile digital audio spread spectrum transmitter, configured to communicate with the spread spectrum receiver, are inaudible while operating in the mobile wireless digital audio spread spectrum transmitter spectrum.

10. The portable wireless digital audio system of claim 9, wherein the digital modulator implementation is communicable with a differential phase shift keying (DPSK) implementation and wherein said DPSK modulates said audio signal representation.

11. The portable wireless digital audio system of claim 9, wherein the digital demodulator implementation is communicable with a differential phase shift keying (DPSK) implementation and wherein said DPSK demodulates said audio signal representation.

12. The portable wireless digital audio system of claim 9, wherein said digital audio spread spectrum transmitter comprising a differential phase shift keying (DPSK) implementation and a digital modulator implementation for spread spectrum transmission.

13. The portable wireless digital audio system of claim 9, wherein said portable digital audio spread spectrum receiver comprising a differential phase shift keying (DPSK) implementation and a digital demodulator implementation for spread spectrum reception.

14. A wireless digital audio spread spectrum receiver, capable of mobile operation, configured to receive a unique user code and a audio signal representation from a mobile digital audio spread spectrum transmitter in the form of packets, said audio signal representation representative of audio from a portable audio source, said digital audio spread spectrum receiver directly communicable with said mobile digital audio transmitter, said digital audio spread spectrum receiver comprising;

a direct conversion module configured to capture packets and the correct bit sequence within the packets and lowering signal detection error through reduced intersymbol interference coding of said audio representation signal respective to mobile said digital audio spread spectrum receiver and said mobile digital audio spread spectrum 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 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, wherein each user has their spread spectrum receiver configured to communicate with their own separate spread spectrum transmitter, said audio having been wirelessly transmitted from said portable audio source such that signals not originating from said mobile digital audio spread spectrum transmitter, configured to communicate with the spread spectrum receiver, are inaudible while operating in the mobile wireless digital audio spread spectrum transmitter spectrum.

15. The wireless digital audio spread spectrum receiver of claim 14, wherein the wireless digital audio spread spectrum receiver comprising a differential phase shift keying (DPSK) implementation and a digital demodulator implementation for spread spectrum reception.

16. A wireless digital audio spread spectrum headphone, configured to receive a unique user code and an audio signal representation from a mobile digital audio spread spectrum transmitter in the form of packets, said audio signal representation representative of audio from a portable audio source, said digital audio spread spectrum headphone directly communicable with said mobile digital audio spread spectrum transmitter, said digital audio spread spectrum headphone comprising;

a direct conversion module configured to capture packets and the correct bit sequence within the packets and lowering signal detection error through reduced intersymbol interference coding of said audio representation signal respective to said spread spectrum headphone and said mobile digital audio spread spectrum 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 audio signal representation;

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

a module adapted to reproduce said generated audio output, wherein each user has their spread spectrum headphone configured to communicate with their own separate spread spectrum transmitter, said audio having been wirelessly transmitted from a portable audio source such that signals not originating from said mobile digital audio spread spectrum transmitter, configured to communicate with the spread spectrum headphone, are inaudible while operating in the mobile wireless digital audio spread spectrum transmitter spectrum.

17. The wireless digital audio spread spectrum headphone of claim 16, wherein the wireless digital audio spread spectrum headphone comprising a differential phase shift keying (DPSK) implementation and a digital demodulator implementation for spread spectrum reception.