Wireless Digital Audio Music System

• US 20110044466A1
• Filed: 11/05/2010
• Published: 02/24/2011
• Est. Priority Date: 12/21/2001
• Status: Active Grant

• Current Assignee: One-E-Way
• Original Assignee: One-E-Way
• Inventors: Woolfork, C. Earl
• Granted Patent: US 8,131,391 B2
• Time in Patent Office: Days
• US Class Current: 381/74
• 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 portable digital audio headphone receiver comprising;

a direct conversion module configured to capture said packets embedded in the received spread spectrum signal;

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.

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 communication with a mobile digital audio transmitter;

a direct conversion module configured to capture 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 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.

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

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

a channel encoder to reduce transmission errors; and

a digital modulator module configured for independent code division multiple access (CDMA) communication operation.

4. 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 communicable with a mobile digital audio transmitter, said wireless digital audio receiver comprising:

a direct conversion module configured to capture 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 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 source virtually free from interference from device transmitted signals operating in the digital wireless audio receiver spectrum.

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

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

an interleaver to reduce transmission errors; and

a digital modulator module configured for CDMA communication;

independent code division multiple access (CDMA) communication operation and utilizing differential phase shift keying (DPSK) to modulate said original audio signal representation.

6. 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 communicable with a mobile digital audio transmitter, said wireless digital audio receiver comprising:

a direct conversion module configured to capture 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;

an de-interleaver generating a corresponding digital output;

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 source virtually free from interference from device transmitted signals operating in the digital wireless audio receiver spectrum.