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Apparatus for implementing 3-dimensional virtual sound and method thereof

A sound, 3D technology, applied in the field of devices that realize 3D virtual sound, can solve problems such as increased complexity

Inactive Publication Date: 2006-08-09
LG ELECTRONICS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the complexity scales linearly with the number of sources in the group

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  • Apparatus for implementing 3-dimensional virtual sound and method thereof
  • Apparatus for implementing 3-dimensional virtual sound and method thereof
  • Apparatus for implementing 3-dimensional virtual sound and method thereof

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[0038] Reference will be made in detail to the preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Where appropriate, the same reference numbers will be used throughout the drawings to refer to the same or like parts. refer to figure 1 , the HRTF modeling method proposed by the present invention for synthesizing multiple moving sounds is described below.

[0039] First, HRTFs in each and every direction were modeled using minimum phase filters and inter-aural time delays.

[0040] A set of basis vectors is then selected from the modeled HRTF using statistical feature selection techniques [S200]. In this case the selection is made in the time domain. In the process of obtaining the variance of the data set, the most representative statistical feature selection method is principal component analysis (PCA), which is analyzed in J.Acoust.Soc.Am.120(4)2211-2218pp. (October, 1997, Zhenyang Wu, Francis H.Y.Chan, and F.K.Lam, "A ti...

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Abstract

An apparatus for implementing a 3-dimensional virtual sound and method thereof are disclosed, in which computational and storage complexity are reduced, in which system stability is secured, and by which the 3-dimensional virtual sound can be implemented in such a mobile platform failing to be equipped with expensive instruments for the implementation of the 3-dimensional sound as a mobile communication terminal and the like. The present invention includes a first step of giving an inter-aural time delay (ITD) to at least one input sound signal, a second step of multiplying output signals of the first step by principal component weight, and a third step of filtering result values of the second step by a plurality of low-order approximated IIR filter models of basis vectors extracted from a head related transfer function (HRTF). The basis vectors, extracted from the head related transfer function database are approximated using balanced model approximation technique.

Description

[0001] This application claims priority from Korean Patent Application No. 10-2005-0010373 filed on February 4, 2005, which is hereby incorporated by reference in its entirety. Background technique [0002] The invention relates to a device and method for realizing 3D virtual sound. Although the present invention is applicable to a wide range of applications, it is particularly suitable for realizing 3D (3-D) virtual sound in a mobile platform not equipped with expensive equipment for realizing 3D sound, used as a mobile communication terminal, or the like. [0003] related technology [0004] Recently, many efforts have been made in the research and development of 3D virtual sound technology, which uses only a pair of speakers or headphones without using advanced , virtual reality and other 3D virtual reality multimedia devices to bring 3D virtual audio effects. In 3D virtual audio technology, the sensitivity of direction, distance, space, etc. is formed, as if the sound is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S5/00
CPCH04S2400/11H04S2420/01H04S1/005H04S2420/03H04S5/00
Inventor P·S·查恩达朴晟镇朴基佑
Owner LG ELECTRONICS INC
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