Abstract
The present invention discloses a method for virtual bass synthesis. The low frequency signal is obtained by applying a low pass filter to the original. In order to reduce the complexity, process of down sampling the low frequency signal, moving the low frequency signal to a series of harmonics whose frequencies are integral times as large as the frequency of low frequency signal, and then up sampling them are provided. By means of psycho-acoustic theory, the weights of harmonics are attained and applied to the harmonics. Finally, the weighted harmonics are combined to produce the bass signal. As a result, the virtual bass effect which is almost the same as the low frequency of the original audio signal can be realized. Because the harmonic signals are high frequency ones, the virtual effect can be made in the panel speakers or ordinary low-end speakers.