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US 2004/0111258 A1Published application
Method and apparatus for noise reduction
AssigneeLiberato Technologies, Inc.
InventorsKambiz C. Zangi, Steven Isabelle
Life of this patent
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Abstract
An apparatus and method for noise reduction is described. The method and apparatus can be used in a hands-free communication system to provide a hands-free a communication system having improved intelligibility. The apparatus includes a first and a second processor, each separately dynamically adapted to changing signals and noise, to improve a signal to noise ratio.
Claims36
A system for processing one or more input signals, the system comprising:
- a first processor having one or more channels, each channel comprising a respective first processor filter, each channel configured to receive a respective one of the one or more input signals, wherein the first processor is configured to provide an intermediate output signal;
- a second processor comprising a second processor filter configured to receive the intermediate output signal and provide a noise-reduced output signal;
- a first adaptation processor coupled to the first processor;
- and
- a second adaptation processor coupled to the second processor.
2 more elements
A system, comprising:
- a first filter portion configured to receive one or more input signals and to provide a single intermediate output signal;
- a second filter portion configured to receive the single intermediate output signal and to provide a single output signal;
- and
- a control circuit configured to receive at least a portion of each of the one or more input signals and at least a portion of the single intermediate output signal and to provide information to adapt filter characteristics of the first and second filter portions.
1 more element
A method for processing one or more input signals, comprising:
- receiving the one or more input signals with a first filter portion, the first filter portion providing an intermediate output signal;
- receiving the intermediate output signal with a second filter portion, the second filter portion providing an output signal;
- dynamically adapting, a response of the first filter portion and a response of the second filter portion.
Dependencies are inferred from the claim text.