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Three-dimensional around sound effect technology aiming at double-track audio signal

An audio signal, surround sound technology, applied in the field of enhancing the sound effect of handheld devices

Inactive Publication Date: 2008-04-02
昊迪移通(北京)技术有限公司 +1
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Problems solved by technology

There is no such available three-dimensional surround sound effect method and device at present

Method used

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  • Three-dimensional around sound effect technology aiming at double-track audio signal
  • Three-dimensional around sound effect technology aiming at double-track audio signal
  • Three-dimensional around sound effect technology aiming at double-track audio signal

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Embodiment Construction

[0024] As shown in Fig. 3, the present invention is realized through a three-dimensional surround engine, and is applicable to any consumer electronic device. 3D surround engine 300 consists of high pass filter 315 / 355, low pass filter 330 / 370, left channel gain estimator 335, right channel gain estimator 375, left channel delay estimator 325 and right channel delay estimator 365 composition. The traditional three-dimensional surround sound effect method uses amplitude surround and delay surround in the whole process of audio signal input, without distinguishing which surround method should be used for which signal, but the three-dimensional surround sound effect of the present invention is not the case. The three-dimensional surround sound effect method of the present invention is to divide the incoming signal into two frequency band signals of high frequency and low frequency, and apply corresponding surround technology to different frequency band signals, that is, the amplit...

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Abstract

The present invention relates to a three-dimension surrounding sound effect method and equipment capable of leading double track audio signal to extend to multi-track three-dimension surrounding audio signal. The present invention establishes a novel model according to the subjective impression principle of human auditory. The hearer relative location between the two speakers can be reflected by the following three parameters: (1) center offset parameter: the hearer relative location between two speakers; (2) swing parameter: mapping the virtual direction of the hearer impression low frequency sound signal; (3) delay parameter: mapping the virtual direction of the hearer impression high frequency sound signal. The auditory system has different subjective impressions of sound directions of low frequency and high frequency, before the present invention using three-dimension surrounding sound effect method, dividing the input sound signals into high frequency sound signals and low frequency sound signals firstly, and mixing sound signals according to human auditory system subjective impression of different frequency band sound signals. The three-dimension surrounding sound effect method designed by the present invention can be easily applied and highly-effectively rebuilt double track sound three-dimension surrounding effect.

Description

technical field [0001] The present invention relates to a method and a device capable of expanding a two-channel audio sound source into a three-dimensional surround sound effect, in particular to a method and a device capable of enhancing the sound effect of a handheld device. [0002] According to the example of the present invention, the three-dimensional surround sound effect technology provides a multi-channel audio reconstruction system, which only needs to transmit the same sound source signal to multiple channels, pass through the filtering system, and adjust some adjustable parameters to achieve Change the auditory position of these reconstructed virtual sound sources. The proper working of 3D surround sound technology is based on three findings: [0003] Amplitude Surrounding: The human auditory system determines the sound source position of the low-frequency sound signal (less than 1000 Hz) according to the strength of the relative amplitude; [0004] Delay surrou...

Claims

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Application Information

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IPC IPC(8): H04R5/04H04S1/00
Inventor 高成伟
Owner 昊迪移通(北京)技术有限公司
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