Generation method of crosstalk elimination filter and three-dimensional sound replaying method
A technology of crosstalk cancellation and filter, which is applied in the field of 3D audio, can solve the problems of strong robustness, excellent sound playback effect, and unreachability, and achieve the effect of improving robustness and effect
Active Publication Date: 2016-07-20
INST OF ACOUSTICS CHINESE ACAD OF SCI
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[0010] The purpose of the present invention is to overcome the problem of pairing the symmetrical loudspeakers of the linear loudspeaker array into loudspeaker groups in the sound playback system of the current linear loudspeaker array, so that the system cannot achieve the strongest robustness and optimal sound playback effect; According to the different frequency components of the signal, the method of selecting the corresponding optimal speaker group from all paired speaker groups greatly improves the robustness and effect of the three-dimensional sound playback system
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[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0034] Such as figure 2 As shown, a generation method of a crosstalk cancellation filter includes:
[0035] Step 101) pairing and combining N loudspeakers in the linear loudspeaker array, a total of loudspeaker groups;
[0036] Step 102) Utilize discrete Fourier transform to convert the sound signal from the time domain to the frequency domain, and the number of frequency points is M;
[0037] M is determined according to the frequency length selected by the discrete Fourier transform, and in this embodiment, M=1024.
[0038] Step 103) Select M optimal speaker groups corresponding to M frequencies, including:
[0039] Step 103-1) numbering all paired speaker groups;
[0040] { ( n , L i , L j ...
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The invention provides a generation method of a crosstalk elimination filter. The method comprises following steps of step 101), matching and combining all loudspeakers in a linear loudspeaker array; step 102), switching sound signals from a time domain to a frequency domain through discrete Fourier transform, wherein the number of frequency points is M; step 103), selecting M optimum loudspeaker groups corresponding to M frequencies; and step 104), according to the M optimum loudspeaker groups corresponding to the M frequencies, through adoption of a regularization method, generating the crosstalk elimination filter. Based on the crosstalk elimination filter generated by the method, the invention also provides a three-dimensional sound reproduction method. The method comprises following steps of switching the double ear sound signals of a listener from the time domain to the frequency domain through discrete Fourier transform; and after the frequency domain signals are input in the crosstalk cancellation filter and the linear loudspeaker array in the step 104), transmitting to the double ears of the listener, thus realizing three-dimensional sound reproduction.
Description
technical field [0001] The invention relates to the technical field of three-dimensional audio, in particular to a method for generating a crosstalk cancellation filter and a method for reproducing three-dimensional sound. Background technique [0002] The sound reproduction system of the linear loudspeaker array is widely used due to its convenience in practical applications. By designing a crosstalk cancellation system, the binaural sound signal containing spatial information is accurately transmitted to the corresponding left (right) ear after passing through the speaker array, so that the listener can perceive the three-dimensional spatial information contained in the sound (Ref. 1]: B.S.Atal, and M.R.Schroeder.ApparentSoundSourceTranslator", U.S.Patent3236949,1966.). However, the design of the crosstalk cancellation system is based on a certain fixed position of the listener in space, and when the listener's head When the head is rotated or the position changes, the th...
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IPC IPC(8): H04R5/02
Inventor 夏日升李军锋颜永红
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI