Self-adaptive equalizer compensation method of vehicle-mounted sound equipment

Abstract

The invention discloses an a self-adaptive equalizer compensation method of vehicle-mounted sound equipment and belongs to the technical field of signal processing systems. The self-adaptive equalizercompensation method of the vehicle-mounted sound equipment comprises the following steps in sequence: after a white noise signal is played, a microphone receives a test signal propagated in a vehicle; carrying out smoothing processing on the test signal to form a secondary test signal; calculating a compensation gain signal of the secondary test signal relative to the white noise signal, smoothing the compensation gain signal to obtain a secondary compensation gain signal, setting a graphic equalizer, and inputting a source audio signal to the graphic equalizer to superpose the secondary compensation gain signal on the source audio signal to obtain a fitting response signal. High flexibility is achieved when the sound signals are corrected, the propagation loss of the sound signals in the air can be well compensated for, distortion is avoided, and the method can be suitable for the conditions of uniform and non-uniform frequency and can also be migrated into other sound systems in aclosed space to be used.

Description

technical field [0001] The invention relates to the technical field of vehicle electronic equipment, in particular to an adaptive equalization method for improving the performance of vehicle audio. [0002] technical background [0003] At present, the existing car stereos are divided into two categories: analog speakers and digital speakers. On the one hand, traditional analog speakers have the problems of large system power consumption, easy superimposition of other interference signals, and poor anti-interference ability, so they are rarely used. On the other hand, all-digital speakers are driven by digital signals without the need for digital-to-analog conversion, amplification, filtering and other signal conversion processes, so they have the characteristics of smaller size and power consumption, and stronger anti-interference ability. For all-digital loudspeaker products, how to make them have the characteristics of high degree of reproduction of traditional analog lou...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of low original sound reproduction of audio signals in the background technology, the present invention provides an adaptive equalizer compensation method for car audio, which compensates the audio signals received by human ears and continuously superimposes and compensates The signal makes the signal curve received by the human ear approximate to the signal curve of the original audio to improve fidelity

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