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Head-related transfer function (HRTF) personalization method and system

A technology of head-related transfer and function, which is applied in the field of signal processing, can solve the problems of HRTF personalization effect, poor accuracy, and does not consider the distance between the sound source and the ears, etc., to achieve good personalized effect and high accuracy Effect

Active Publication Date: 2016-11-23
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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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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  • Head-related transfer function (HRTF) personalization method and system
  • Head-related transfer function (HRTF) personalization method and system
  • Head-related transfer function (HRTF) personalization method and system

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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 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.

[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] G ~ l 0 ( θ l i n c , ρ ...

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 Image 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 t...

Embodiment 3

[0160] Embodiment 3 of the present invention provides a system for personalizing head-related transfer functions. like 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 head-related transfer function (HRTF) personalization method and system. By means of the method and the system, a distance model is established at first; a sound source signal related to a distance is obtained; then, a horizontal angle and an elevation angle are respectively modelled by utilizing PCA; in a personalized adjusting process of a HRTF, personalized adjustment of a model parameter is carried out by utilizing the sound source signal related to the distance, so that the correct orientation of a sound source is obtained; therefore, the personalized HRTF is obtained; combination of a structured HRTF model and PCA coefficient adjustment is realized; because the established distance model considers a distance factor between the sound source and double ears, a measurer can feel change of the distance; and thus, the obtained HRTF is good in personalized effect and high in 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 Applications(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
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