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A personalized method and system for head-related transfer function

A head-related transfer and function technology, applied in the field of signal processing, can solve problems such as poor accuracy, poor HRTF personalization effect, and no consideration of sound source and binaural distance factors, achieving high accuracy and good personalized effect. Effect

Active Publication Date: 2018-02-23
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the embodiments of the present invention is to provide a personalized method and system for head-related transfer function, aiming to solve the problem that the HRTF personalized method provided by the prior art does not consider the distance factor between the sound source and the ears, resulting in the obtained The personalization effect of HRTF is poor and the accuracy is poor

Method used

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  • A personalized method and system for head-related transfer function
  • A personalized method and system for head-related transfer function
  • A personalized method and system for head-related transfer function

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Embodiment 1

[0033] Embodiment 1 of the present invention provides a method for personalizing head-related transfer functions, such as figure 2 shown, including the following steps:

[0034] S1: Perform distance-related gain filtering on the monophonic sound source input signal to obtain a distance-related left-ear sound source output signal and a distance-related right-ear sound source output signal.

[0035] Further, as image 3 As shown, step S1 includes the following steps:

[0036] S11: Calculating the DC gain estimate for the left ear and the DC gain estimate for the right ear where the DC gain estimate for the left ear Can be expressed as:

[0037]

[0038] Estimated DC gain for the right ear Can be expressed as:

[0039]

[0040] Among them, θ linc is the incident angle of the left ear, θ rinc is the incident angle of the right ear, ρ is the ratio of the distance r between the sound source and the center of the head and the radius of the head, p 11 ,p 21 ,q 1...

Embodiment 2

[0141] Embodiment 2 of the present invention provides a method for personalizing head-related transfer functions. Different from Embodiment 1, in order to improve the horizontal angle positioning and further optimize the personalized effect, such as Figure 6 As shown, before step S201, the following steps may also be included:

[0142] S200: Remove the initial time delay from the HRIR of the left ear and the HRIR of the right ear of each measurer at each horizontal angle in the HRTF database, and then fill the end of each HRIR with zeros to 200 sampling points.

[0143] At this time, after step S208, the following steps are also included:

[0144] S209: Adjust the initial time delay of each HRIR in the HRTF database. When the measurer does not feel the change of the horizontal angle, add the time delay value at this time to the adjusted corresponding HRIR.

[0145] Among them, the adjusted initial value of the initial delay is the average time delay from the sound source ...

Embodiment 3

[0160] Embodiment 3 of the present invention provides a system for personalizing head-related transfer functions. Such as Figure 7 As shown, it includes: a gain filter module 1, which is used to perform distance-related gain filter processing on the monophonic sound source input signal to obtain a distance-related left ear sound source output signal and a distance-related right ear sound source output Signal; horizontal angle personalization module 2, which is used to perform principal component analysis on the horizontal angle in the binaural polar coordinate system based on the measurement data of the HRTF database, to reconstruct HRIR, and combine the left ear sound source obtained by the gain filter module 1 Output signal and right ear sound source output signal, adjust HRIR to obtain personalized HRIR; height angle personalization module 3, used for principal component analysis of height angle in binaural polar coordinate system based on measurement data of HRTF database...

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Abstract

The invention belongs to the technical field of signal processing, and provides a personalized method and system for a head-related transfer function. The method and system first establishes a distance model to obtain distance-related sound source signals, and then uses PCA to model the horizontal angle and elevation angle respectively. The parameters are adjusted individually to feel the correct orientation of the sound source, and then the personalized HRTF is obtained, which realizes the combination of the structured HRTF model and the PCA coefficient adjustment, because the established distance model takes into account the distance between the sound source and the ears The distance factor enables the measurer to feel the change of the distance, so the obtained HRTF has good personalized effect and high precision.

Description

technical field [0001] The invention belongs to the field of signal processing, and in particular relates to a personalized method and system for a head-related transfer function based on structural models and principal component analysis. Background technique [0002] With the rapid development of virtual reality technology, 3D audio is sought after for its "presence" and "immersion". Binaural hearing technology uses head-related transfer function (Head-Related Transfer Function, HRTF) to restore the three-dimensional sound field. [0003] HRTF is the ratio of the sound pressure at the eardrum to the sound pressure in free space (when there is no observer, at the center of the head), it is a function of direction, distance, frequency, and its time domain representation is the head-related impulse response ( Head-Related ImpulseResponse, HRIR), the left and right ears have their own HRTF. Binaural hearing technology convolves the sound source with the HRIR of the left and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04S1/00
CPCH04S1/002H04S1/005H04S2420/01
Inventor 陈喆殷福亮张古强袁康
Owner DALIAN UNIV OF TECH