A method and device for increasing reverberation

Abstract

The embodiment of the present invention provides a method and device for generating reverberation, which obtains the room impulse response RIR of the indoor environment, and the RIR represents the time domain information of the reverberation in the room; determines the target head-related impulse response HRIR in the audio system data, and calculate the energy and length of the target HRIR data; according to the energy of the target HRIR data, the RIR is normalized to obtain the first signal; according to the length of the target HRIR data, the first signal is Perform fade-in processing to obtain a second signal; determine distance information, which is used to represent the distance between the virtual sound source and the user; perform energy adjustment on the second signal according to the distance information to generate a late reverberation signal. It is convenient to obtain the real sampling reverberation in real time; at the same time, the obtained sampling reverberation is processed, adding energy normalization and gain control combined with distance information, which can enhance the external sense of the head in the audio system, and generate different sense of distance.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and device for increasing reverberation. Background technique [0002] The current research in the field of virtual reality is very extensive, and the experience of virtual audio has also been paid more and more attention. At present, the VR audio effect mainly uses head related transfer function HRTF (Head Related Transfer Function) technology combined with head tracking to realize the effect that the sound source does not move with the head, simulating the real environment audio experience. [0003] For a time-domain signal-Head Related Impulse Response HRIR (Head Related Impulse Response), the frequency-domain signal can be obtained by fast Fourier transform FFT, that is, the HRTF signal. On the contrary, the HRTF signal can be obtained by IFFT. HRIR signal, both can be regarded as an equivalence relationship. VR audio systems generally include a HRIR or HRTF ...

AI Technical Summary

Problems solved by technology

Therefore, the calculation modules and parameter settings involved are very complicated; in addition, FDN is an artificial reverberation, and different FDN parameters need to be set for different scenes, so it cannot be flexibly applied to various application scenarios; the effect is difficult to be consistent with the real environment reverberation; and there is no Realize the control function of the sense of distance

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