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Tone balancing method for virtual sound replay of loudspeaker

An equalization method and speaker technology, applied in the directions of speaker distribution signal, stereo system, frequency response correction, etc., can solve problems such as low frequency, achieve the effect of improving timbre and avoiding insufficient low frequency

Active Publication Date: 2020-08-18
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

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  • Tone balancing method for virtual sound replay of loudspeaker
  • Tone balancing method for virtual sound replay of loudspeaker
  • Tone balancing method for virtual sound replay of loudspeaker

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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 tone balancing method for virtual sound playback of a loudspeaker. The tone balancing method comprises the following steps: inputting an original single-channel audio signal E0; processing a single-channel audio signal by a pair of auditory transmission synthesis filters; obtaining signals EL and ER of the two paths; wherein the pair of auditory transmission synthesis filters adopts a loudspeaker virtual sound signal processing function comprising high-frequency-band power equalization and low-frequency-band multiplication with a gain factor irrelevant to frequency tofilter a single-channel audio signal; and selectively feeding the signals EL and ER of the two paths to a left loudspeaker and a right loudspeaker which are symmetrically arranged in front of the horizontal plane to be replayed. By introducing the frequency division frequency, power equalization is carried out on the loudspeaker virtual sound signal at the high frequency band above the frequency division frequency, the shape of the amplitude spectrum of the low frequency band is kept unchanged, the tone quality of loudspeaker virtual sound replay is improved, insufficient replay low frequencycan be avoided, and virtual source positioning of replay is not influenced.

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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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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