| 摘要 |
<p>The present invention relates to a method for processing sound signals in a vehicle multimedia system, comprising the steps of:
- detecting, by a microphone (4; 404), a sound signal in a vehicle, the sound signal comprising a first voice signal component corresponding to a voice signal from a passenger (2; 401) of the vehicle, and a second voice signal component resulting from reproducing a processed voice signal by means of a loudspeaker (3; 403), the sound signal further comprising an audio signal component resulting from reproducing an audio signal of an audio source (5; 410) in the vehicle,
- estimating an impulse response between a loudspeaker (3; 403) used to reproduce the audio signal and the microphone (4; 404),
- simulating a simulated audio signal component based on the impulse response,
- simulating a simulated second voice signal component based on the impulse response,
- removing the simulated audio signal component and the simulated second voice signal component from the detected sound signal for obtaining an audio- and echo-compensated signal,
- estimating a background noise level based on the audio- and echo-compensated signal, and
- adjusting a volume of sound put out by the vehicle multimedia system (100; 400) based on the estimated background noise level.</p> |
