A method for realizing crosstalk elimination and filter generation and playing device

Abstract

This invention discloses a crosstalk eliminating method including the following steps: a determining filters C1 and C2, corresponding to the current position point of a playing device, b, computing the SqC1-Sqc2 striking response based on the striking response of C1, C2 c, acquiring the crosstalk eliminating filters with different step numbers under different delays, d, determining the final used crosstalk eliminating filter based on the SN ratio of the filter, e, placing the filter in the playing device of step a to filer the currently playing audio signals. A generation device and a play device are disclosed which can completely eliminate the crosstalk generated by the propagation of stereo and multi-channel audio signals.

Description

technical field [0001] The present invention relates to crosstalk cancellation technology, in particular to a method for realizing crosstalk cancellation, a device for generating a crosstalk cancellation filter, and a playback device using the crosstalk cancellation technique. Background technique [0002] When people use two loudspeakers or sound boxes to play music with stereo effect, when two-channel audio containing 3D information, the left ear can often hear the sound of the right loudspeaker, and the right ear can hear the sound of the left loudspeaker. , will seriously affect the effect of stereo or 3D. In order to solve this problem, it is necessary to introduce crosstalk cancellation. The so-called crosstalk cancellation is to use an appropriate filter matrix to filter the multi-channel audio signal, and then use the speaker or speaker to play it, so that the left ear only hears the left audio signal. The right ear can only hear the sound from the right speaker or ...

AI Technical Summary

Problems solved by technology

[0031] The characteristic of the above adaptive filter method is that it requires a large amount of calculation, whether using the minimum mean square error or the minimum variance, it is necessary to design an M-order inverse filter, and the computational complexity is in Ω(M 2 )above

In the case of using other auxiliary tools, such as magnetic field or camera, to obtain the position of the head, this method can eliminate crosstalk for different positions of the head, but in the derivation process, the method makes an approximate assumption, which will affect the crosstalk The effect of sound cancellation produces a slight damage

In addition, since the head-related transfer function (HRTF) in 3D audio is used, the process of designing a crosstalk cancellation filter is merged with the process of filtering using HRTF, so this method is not suitable for crosstalk cancellation in stereo

Moreover, due to the large amount of calculation of this method, the adaptation needs to introduce additional hardware, which will increase the cost of crosstalk cancellation

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