Auxiliary Device Noise Generation for Adaptive Suppression

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Solution Overview

Problem

Existing noise suppression technologies are limited in effectively removing noise when it is not significantly smaller than the target signal, leading to poor noise estimate accuracy and increased distortion, and require large storage capacity for various noise types, which can differ from actual noise in changing environments.

Innovation Solution

A system comprising an information processing apparatus and an auxiliary device that generates noise for suppression, allowing real-time updating of noise information based on suppression results, enabling effective noise suppression without pre-storing extensive noise information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If pre-stored noise information is used for noise suppression, then noise suppression effectiveness is improved, but storage capacity requirements increase and the system cannot adapt to changing noise environments

Engineering Contradiction:

Improvenoise suppression effectivenessVSAvoidstorage capacity

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The system generates its own noise information through a noise generation unit that creates artificial noise signals. This self-generated noise information is then used by the noise suppression unit to suppress actual noise in input signals, eliminating the need for large pre-stored noise databases while maintaining suppression effectiveness.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system incorporates a feedback mechanism where the noise suppression result is fed back to update the generated noise information. The noise information generation unit continuously refines the artificial noise signals based on suppression outcomes, enabling adaptation to changing noise environments without increasing storage capacity.

Inventive Principle:

Principle #23Feedback

2Adaptability or versatility

If more types of noise information are pre-stored, then the variety of eliminatable noise increases, but storage capacity and production cost increase

Engineering Contradiction:

Improvevariety of eliminatable noiseVSAvoidstorage capacity

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The noise generation unit creates universal artificial noise signals that can represent multiple noise types through parameter adjustment rather than storing separate databases for each noise type. This single multi-functional unit replaces what would otherwise require multiple specialized noise databases.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system achieves versatility in handling different noise types by changing parameters of the generated noise information (such as spectral characteristics, intensity, and temporal patterns) rather than storing fundamentally different noise databases. This allows adaptive representation of various noise types with minimal storage.

Inventive Principle:

Principle #35Parameter changes

3Quantity of substance

If noise information is estimated only from noisy signals, then no additional storage is needed, but noise estimate accuracy deteriorates when noise is not much smaller than the target signal

Engineering Contradiction:

Improvestorage requirementVSAvoidnoise estimate accuracy

Core Design Contradiction:

Quantity of substanceVSMeasurement precision

Solution Approach 1:

The system introduces an intermediary artificial noise generation process that creates idealized noise signals serving as a reference. This generated noise information acts as a mediator between the noisy input signal and the suppression process, providing accurate noise estimates without requiring large pre-stored databases.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS9548062B2Information processing apparatus, auxiliary device therefor, information processing system, control method therefor, and control program

Publication Date: 2017.01.17 NEC CORP

AI summary

Disclosed is a noise suppression technology for suppressing various types of noise including unknown noise without storing a large number of noise information in advance.Specifically disclosed is an auxiliary device connectable to an information processing apparatus. The information processing apparatus is provided with: means for suppressing noise in a noisy signal, generating the noise information, and suppressing the noise in the noisy signal by using the generated noise information; and noise information generation means for updating the noise information on the basis of the result of suppression of the noise in the noisy signal. The auxiliary device is provided with a mechanism unit for generating noise to be suppressed by the noise suppression means and a mechanism control unit for controlling the mechanism unit so that the noise occurs at a timing at which the noise suppression means performs a noise suppression process.