Back to results
US 2009/0022330 A1Published application
System for processing sound signals in a vehicle multimedia system
AssigneeHarman Becker Automotive Systems GmbH
InventorsTim Haulick, Viola Hoff, Gerhard Schmidt
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for processing sound signals in a vehicle multimedia system. A sound signal is recorded by a microphone. A voice signal component resulting from reproducing a voice signal and an audio signal component resulting from reproducing an audio signal are compensated in the recorded sound signal. The invention further relates to a system for processing sound signals and a vehicle multimedia system.
Claims36
Method for processing sound signals in a vehicle multimedia system, comprising:
- detecting a sound signal with a microphone, where the sound signal has a first voice signal component that corresponds to a voice signal, a second voice signal component that results from a loudspeaker, and an audio signal component resulting from an audio signal;
- estimating an impulse response between the loudspeaker and the microphone;
- simulating a simulated audio signal component with the impulse response;
- simulating a simulated second voice signal component based on the impulse response;
- removing the simulated audio signal component and simulated second voice signal component from the detected sound signal that results in a compensated signal;
- estimating a background noise level based on the compensated signal;
- and
- adjusting a sound output volume by the vehicle multimedia system based on the estimated background noise level.
5 more elements
A system for sound signal processing in a vehicle multimedia system, comprising:
- at least one loudspeaker that is able to reproduce an audio signal from an audio source and a processed voice signal;
- at least one microphone for detection of a sound signal, where the sound signal includes
- a first voice signal component that corresponds to a voice signal,
- a second voice signal component that corresponds to the reproduced processed voice signal, and
- an audio signal component corresponding to the reproduced audio signal;
- an estimator that estimates an impulse response between the loudspeaker used to reproduce the audio signal and the microphone;
- a first processing unit that compensates for the audio signal component in the detected sound signal where a first error signal is obtained with a first filter using the impulse response as filter coefficients;
- a second processing unit that compensates for the second voice signal component in the detected sound signal where a second error signal is obtained with a second filter using the same impulse response as filter coefficients;
- a processor that estimates a background noise level based on the second error signal;
- and
- a controller that controls the amplification of the second error signal based on the background noise level.
8 more elements
A method for processing sound signals in a vehicle multimedia system, comprising:
- detecting a sound signal in a vehicle with a microphone, the sound signal having a first voice signal component corresponding to a voice signal and a second voice signal component that results from reproduction of a processed voice signal with a loudspeaker, and an audio signal component resulting from reproducing an audio signal from an audio source;
- estimating an impulse response between a loudspeaker and the microphone;
- estimating an estimated audio signal component based on the impulse response;
- estimating an estimated second voice signal component based on the same impulse response;
- and
- removing the estimated audio signal component and the estimated second voice signal component from the detected sound signal for obtaining a compensated signal.
3 more elements
A system for sound signal processing in a vehicle multimedia system, comprising:
- at least one loudspeaker that reproduces an audio signal and a processed voice signal;
- at least one microphone for detecting a sound signal having a first voice signal component that corresponds to a voice signal from a passenger, a second voice signal component that corresponds to the reproduced processed voice signal, and an audio signal component that corresponds to the reproduced audio signal;
- an estimating unit for estimating an impulse response between the loudspeaker used to reproduce the audio signal and the microphone;
- a first processing unit formed to compensate the audio signal component in the detected sound signal where a first error signal is obtained, comprising a first filter using the impulse response as filter coefficients;
- and
- a second processing unit formed to compensate the second voice signal component in the detected sound signal where a second error signal is obtained, comprising a second filter using the same impulse response as filter coefficients.
3 more elements
A vehicle multimedia system comprising:
- a karaoke system that generates an audio signal and displays information relating to the audio signal to a passenger;
- at least one loudspeaker that is able to reproduce the audio signal of the karaoke system and a processed voice signal;
- at least one microphone for that detects a sound signal having a first voice signal component that corresponds to a voice signal from a passenger of the vehicle, a second voice signal component that corresponds to the reproduced processed voice signal, and an audio signal component that corresponds to the reproduced audio signal;
- an estimating unit that estimates an impulse response between the loudspeaker used to reproduce the audio signal and the microphone;
- a first processing unit formed to compensate the audio signal component in the detected sound signal where a first error signal is obtained, having a first filter that uses the impulse response as filter coefficients;
- and
- a second processing unit formed to compensate the second voice signal component in the detected sound signal where a second error signal is obtained, comprising a second filter that uses the same impulse response as filter coefficients, where the second error signal is a compensated signal that is reproduced by the loudspeaker as a processed voice signal.
4 more elements
A method of operating a vehicle multimedia system comprising a karaoke system, comprising:
- reproducing an audio signal of said karaoke system with a loudspeaker;
- displaying information relating to the audio signal to a passenger of the vehicle;
- detecting a sound signal with a microphone in the vehicle, the sound signal having a first voice signal component that corresponds to a voice signal from a passenger of the vehicle and a second voice signal component that results from reproducing a processed voice signal by a loudspeaker, the sound signal also having an audio signal component resulting from reproduction of the audio signal;
- estimating an impulse response between a loudspeaker used to reproduce the audio signal and the microphone;
- estimating an estimated audio signal component based on said impulse response;
- estimating an estimated second voice signal component based on the same impulse response;
- and
- removing the estimated audio signal component and the estimated second voice signal component from the detected sound signal for obtaining a compensated signal for a reproduction as a processed voice signal.
5 more elements
Dependencies are inferred from the claim text.