Active noise filtering for voice communication systems

• US 20030053636A1
• Filed: 09/19/2002
• Published: 03/20/2003
• Est. Priority Date: 09/20/2001
• Status: Abandoned Application

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Snodgrass, Ken L., Goldberg, Mark L.
• Application Number:
  US10/251,479
• Publication Number:
  US 20030053636A1
• Time in Patent Office: Days
• US Class Current: 381/71.11
• CPC Class Codes: G01S 11/02 using radio waves G01S19/00 takes precedence
• CPC Class Codes: G01S 19/13 Receivers
• CPC Class Codes: G01S 19/15 Aircraft landing systems
• CPC Class Codes: G01S 19/51 Relative positioning
• CPC Class Codes: G01S 5/0284 Relative positioning
• CPC Class Codes: G08G 5/0008 with other aircraft
• CPC Class Codes: G08G 5/0013 with a ground station
• CPC Class Codes: G08G 5/0021 located in the aircraft
• CPC Class Codes: G08G 5/025 Navigation or guidance aids radar or analogous systems specially adapted for landing purposes G01S13/913
• CPC Class Codes: H01H 2217/022 Part of keyboard not operable
• CPC Class Codes: H04B 7/18506 Communications with or from aircraft, i.e. aeronautical mobile service
• CPC Class Codes: H04B 7/18508 with satellite system used as relay, i.e. aeronautical mobile satellite service
• CPC Class Codes: H04L 12/40019 Details regarding a bus master
• CPC Class Codes: H04L 12/40032 Details regarding a bus interface enhancer
• CPC Class Codes: H04L 12/413 with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
• CPC Class Codes: H04L 2012/4028 the transportation system being an aircraft
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04R 3/00 Circuits for transducers , loudspeakers or microphones
• CPC Class Codes: Y04S 40/18 : Network protocols supporting networked applications, e.g. including control of end-device applications over a network

Abstract

The present invention includes a processor configured to receive at least one operating parameter from an operating parameter input and, based on the operating parameter, configure at least one filter to filter a signal.

Claims

1. A noise filtering apparatus comprising:

a processor, said processor being configured to receive at least one operating parameter from an operating parameter input; and

at least one filter coupled to said processor, said at least one filter being configurable by said processor based on said at least one operating parameter.

2. The noise filtering apparatus of claim 1 further comprising an audio source coupled to said noise filtering apparatus, said audio source being configured to transmit an audio signal to said noise filtering apparatus.

3. The noise filtering apparatus of claim 2 wherein said audio source comprises a microphone.

4. The noise filtering apparatus of claim 1 further comprising an output device coupled to said noise filtering apparatus, said output device being configured to transmit a filtered signal received from said noise filtering apparatus.

5. The noise filtering apparatus of claim 2 wherein said output device comprises a loudspeaker.

6. The noise filtering apparatus of claim 2 wherein said output device comprises a transmitter.

7. The noise filtering apparatus of claim 1 wherein said at least one filter coupled to said processor comprises a plurality of digital filters coupled to said processor, wherein each of said plurality of digital filters is configurable by said processor based on said at least one operating parameter.

8. The noise filtering apparatus of claim 2 further comprising an analog-to-digital converter coupled between said audio source and said noise filtering apparatus, said analog-to-digital converter being configured to convert an analog signal to a digital signal.

9. The noise filtering apparatus of claim 4 further comprising a digital-to-analog converter coupled between said noise filtering apparatus and said output device, said digital-to-analog converter being configured to convert a digital signal to an analog signal.

10. The noise filtering apparatus of claim 1 wherein said at least one operating parameter comprises a plurality of operating parameters.

11. A noise filtering apparatus comprising:

a processor, said processor being configured to receive at least one operating parameter from an operating parameter input;

a plurality of digital filters coupled to said processor, each of said plurality of filters being configurable by said processor based on said at least one operating parameter;

an analog-to-digital converter coupled to said noise filtering apparatus, said analog-to-digital converter being configured to convert an analog signal to a digital signal;

an audio source coupled to said analog-to-digital converter, said audio source being configured to transmit an analog signal to said noise filtering apparatus via said analog-to-digital converter;

a digital-to-analog converter coupled to said noise filtering apparatus, said digital-to-analog converter being configured to convert a digital signal to an analog signal; and

an output device coupled to said digital-to-analog converter, said output device being configured to transmit a filtered signal received from said noise filtering apparatus via said digital-to-analog converter.

12. The noise filtering apparatus of claim 11 wherein said output device comprises a loudspeaker.

13. The noise filtering apparatus of claim 11 wherein said audio source comprises a microphone.

14. A noise filtering method comprising the steps of:

analyzing a frequency spectrum to identify at least one noise source;

selecting at least one filter based on a frequency associated with said at least one noise source;

configuring a processor to adaptively configure said at least one filter;

supplying said processor with at least one operating parameter; and

configuring said at least one filter based on said at least one operating parameter.

15. The noise filtering method of claim 14 wherein said step of selecting at least once filter comprises the step of selecting a plurality of filters.

16. The noise filtering method of claim 15 wherein said step of configuring at least one filter based on said at least one operating parameter comprises the step of configuring a plurality of filters based on said at least one operating parameter.

17. The noise filtering method of claim 14 further comprising the step of using said at least one filter to filter an audio signal.

18. The noise filtering method of claim 17 further comprising the step of transmitting said audio signal to an output device after filtering said audio signal.

19. The noise filtering method of claim 18 wherein said output device comprises a loudspeaker.

20. The noise filtering method of claim 14 further comprising the step of transmitting an audio signal from an audio source to said at least one filter.

21. The noise filtering method of claim 20 wherein said audio source is a microphone.