A method, system, medium and device for directional sound virtual low frequency enhancement

A directional sound and low-frequency technology, which is applied in signal processing, sensor components, sensors, etc., can solve the problems of poor low-frequency signal processing effects, achieve the effects of reducing the amount of calculation, improving processing efficiency, and enhancing low-frequency sound quality

Active Publication Date: 2021-07-20
重庆清文科技有限公司
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Problems solved by technology

[0003] In view of the above existing problems in the prior art, the present invention proposes a directional sound virtual low-frequency enhancement method, system, medium and equipment, mainly to solve the problem of poor low-frequency signal processing effect in the prior art

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  • A method, system, medium and device for directional sound virtual low frequency enhancement
  • A method, system, medium and device for directional sound virtual low frequency enhancement
  • A method, system, medium and device for directional sound virtual low frequency enhancement

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Embodiment Construction

[0046] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0047] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the compo...

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Abstract

The present invention proposes a virtual low-frequency enhancement method, system, medium and equipment for directional sound, including: splitting the audio signal to obtain the high-frequency signal and low-frequency signal of the audio signal; down-sampling the low-frequency signal Calculate the amplitude spectrum and phase spectrum of the low-frequency signal according to the sampling points obtained by downsampling; calculate the proportional factor of the response harmonic frequency amplitude and the fundamental frequency amplitude according to the amplitude spectrum; use the proportional factor to perform exponential attenuation on each harmonic frequency, Obtain the attenuated harmonic frequency amplitude; obtain a harmonic frequency time domain signal according to the attenuated harmonic frequency amplitude and the corresponding phase spectrum; perform upsampling on the harmonic frequency time domain signal to obtain a virtual low frequency signal; convert the virtual low frequency The signal is superimposed on the high-frequency signal to obtain an output audio signal; the invention can effectively enhance the low-frequency sound signal.

Description

technical field [0001] The present invention relates to the technical field of audio processing, in particular to a method, system, medium and equipment for directional sound virtual low-frequency enhancement. Background technique [0002] The low-frequency components in the audio play a vital role in the listening experience, directly affecting the fullness, thickness and sense of space of the sound. The low-frequency part of ultrasonic directional sound is the most difficult point of ultrasonic carrying technology. The traditional low-frequency enhancement method uses an audio equalizer to directly enhance low-frequency energy. This method is likely to cause distortion of the playback signal, and may even damage the audio system in severe cases. In comparison, the virtual bass enhancement technology has a better effect. The virtual bass technology is formed from the theory of psychoacoustics. When people perceive heavy bass, they do not mainly rely on the fundamental fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/00
CPCH04R3/00H04R2430/00
Inventor 张京京杨剑锋闫磊
Owner 重庆清文科技有限公司
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