Virtual stereo synthesis method and device

Abstract

Disclosed are a virtual stereo synthesis method and device. The method comprises: acquiring at least one voice input signal at one side and at least one voice input signal at the other side; respectively conducting ratio processing on a left ear component of a preset head related transfer function (HRTF) and a right ear component of the preset head related transfer function (HRTF) of each of the voice input signals at the other side, so as to obtain a filter function of each of the voice input signals at the other side; respectively conducting convolution filtering on each of the voice input signals at the other side and the filter function of each of the voice input signals at the other side to obtain filtering signals at the other side; and synthesizing all the voice input signals at one side and all the filtering signals at the other side to form virtual stereo signals. By means of the above-mentioned method, the present application can improve the tonal coloration effect and reduce the calculation complexity.

Description

technical field [0001] The present application relates to the technical field of audio processing, in particular to a virtual stereo synthesis method and device. Background technique [0002] At present, earphones have been widely used in enjoying music and video. When using headphones to reproduce stereo signals, head positioning effects often occur, resulting in unnatural hearing effects. After research, the reasons for the head positioning effect are as follows: 1) The earphone directly transmits the virtual sound signal synthesized by the left and right channel signals to both ears, and there is no natural sound scattered by the human head, ear gallery, torso, etc. 2) The synthesized virtual sound signal lacks the early reflection and late reverberation of the room, which affects the listener's perception of the sound distance. And the feeling of the size of the space. [0003] In order to alleviate the head positioning effect, the prior art measures data that can exp...

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Problems solved by technology

However, the virtual sound signal in the above method needs to convolve the left and right channel signals separately, which will have a certain impact on the original frequencies of the left and right channel signals, resulting in a sound dyeing effect, and also increasing the complexity of the calculation

[0007] The prior art also provides the use of BRIR data instead of the above-mentioned HRTF data to perform stereo simulation on the signals input from the left and right channels. The BRIR data also includes the comprehensive filtering effect of the environment on the sound waves. Although the stereo effect is improved compared with the HRTF data, its The calculation complexity is higher, and the sound dyeing effect still exists

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