Automobile Communication Engine Noise Estimation Module
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Solution Overview
Problem
Automobile communication systems face challenges in effectively reducing ambient noise, particularly engine noise, which degrades the quality of voice communications during hands-free calls, as conventional methods struggle to accurately isolate and minimize engine noise from other noise components.
Innovation Solution
An automobile communication system that utilizes an engine noise estimation module, combining a signal input from a sensor and an engine rotational frequency signal to generate a modified input signal by estimating and removing or altering the engine noise component, allowing for improved noise reduction and enhanced user experience by distinguishing engine noise from other ambient noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional noise reduction methods are used to reduce ambient noise, then some noise reduction is achieved, but the ability to accurately isolate and minimize engine noise from other noise components is insufficient
Solution Approach 1:
The patent segments the ambient noise into distinct components: engine noise and non-engine noise. By using the RPM signal to identify engine noise characteristics, the system separates engine noise from other ambient sounds, allowing targeted reduction of engine noise while preserving other noise components.
Solution Approach 2:
The patent introduces an RPM signal as an intermediary to mediate between the raw ambient noise and the noise reduction process. This RPM signal serves as a reference that helps the adaptive filter identify and isolate engine noise components, improving the precision of noise component separation.
2Object-affected harmful factors
If engine noise is aggressively reduced from the input signal, then engine noise transmission is minimized, but the user experience may lose authentic automobile ambiance
Solution Approach 1:
The patent implements dynamic control of noise reduction by providing multiple modes: a first mode that reduces engine noise transmission and a second mode that transmits engine noise. The system can adaptively switch between modes based on user preferences, making the noise reduction dynamic rather than static.
Solution Approach 2:
The patent changes the parameter of noise transmission by offering different operational modes. In the first mode, the transmission parameter for engine noise is reduced, while in the second mode, the transmission parameter is increased to preserve authentic automobile ambiance, allowing users to adjust the parameter according to their experience preferences.
Data Source
AI summary
In an aspect, in general, an automobile communication system includes a first signal input for receiving an input signal from a sensor, a second signal input for receiving a first signal representing a rotational frequency associated with a portion of an engine of the automobile, an engine noise estimation module, and a transmitter. The engine noise estimation module is configured to determine an estimate of an engine-related component of the input signal based on the input signal and the first signal and to form a modified input signal. The engine noise estimation module includes a signal combination module configured to form the modified input signal, including combining the estimate of the engine-related component with the input signal. The transmitter is configured to transmit the modified input signal as part of an outgoing communication.