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A Tone Balance Method for Loudspeaker Virtual Sound Reproduction

An equalization method and speaker technology, applied in the directions of speaker distribution signals, stereo systems, electrical components, etc., can solve problems such as low frequencies, and achieve the effect of improving timbre and avoiding insufficient low frequency.

Active Publication Date: 2021-07-20
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, the timbre equalization signal processing involved in the authorization of these two national invention patents still has the problem of insufficient low frequency of the reproduced sound

Method used

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  • A Tone Balance Method for Loudspeaker Virtual Sound Reproduction
  • A Tone Balance Method for Loudspeaker Virtual Sound Reproduction
  • A Tone Balance Method for Loudspeaker Virtual Sound Reproduction

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, but the implementation and protection scope of the present invention are not limited thereto.

[0030] The block diagram of the system of the present invention is as figure 1 shown. A pair of true horizontal speakers are positioned in front of the listener to the left and right. Input the original single-channel audio signal E 0 ; The single-channel audio signal is processed by a pair of auditory transmission synthesis filters to obtain the two-channel signal E L and E R , the pair of auditory transmission synthesis filters adopts a loudspeaker virtual sound signal processing function comprising high-band power equalization and low-band multiplication by a frequency-independent gain factor to filter the single-path audio signal, and the two-path signal E L and E R Respectively feed the reproduction of the left and right loudspeakers arrange...

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Abstract

The invention provides a timbre equalization method for loudspeaker virtual sound reproduction, inputting the original single-channel audio signal E 0 ; The single-channel audio signal is processed by a pair of auditory transmission synthesis filters to obtain the two-channel signal E L and E R , the pair of auditory transmission synthesis filters adopts a loudspeaker virtual sound signal processing function comprising high-band power equalization and low-band multiplication by a frequency-independent gain factor to filter the single-channel audio signal, and the two-channel signal E L and E R Respectively feed the reproduction of the left and right loudspeakers arranged symmetrically in front of the horizontal plane. By introducing the crossover frequency, the power balance of the speaker's virtual sound signal is carried out in the high frequency band above the crossover frequency, while keeping the shape of the amplitude spectrum of the low frequency band unchanged, the timbre of the virtual sound reproduction of the loudspeaker is improved, and the replay can be avoided. Low frequencies are insufficient, and the invention does not affect virtual source positioning for playback.

Description

technical field [0001] The invention relates to the technical field of electroacoustics, in particular to a tone color equalization method for loudspeaker virtual sound reproduction. Background technique [0002] Loudspeaker virtual sound reproduction, also known as auditory transmission reproduction, is a spatial sound reproduction technology. It utilizes head-related transfer function signal processing to control binaural sound pressure in speaker reproduction, thereby producing perceptual virtual sources of different spatial orientations with a small number of speakers. A typical application of loudspeaker virtual sound reproduction is virtual surround sound reproduction, which uses a pair of speakers arranged in front of the listener to generate a virtual speaker in the front half level, so as to realize the reproduction of multi-channel surround sound signals with a small number of speakers. This method has been applied to virtual playback of 5.1 channel and other mult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04S3/00H04S7/00H04R3/04H04R3/12
CPCH04R3/04H04R3/12H04S3/008H04S7/307
Inventor 刘路路谢菠荪
Owner SOUTH CHINA UNIV OF TECH
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