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An audio signal processing apparatus and method for filtering an audio signal

An audio signal processing and audio signal technology, applied in audio signal processing device and audio signal filtering, creating virtual sound image field, can solve the problem of wrong spatial perception, multi-sound coloring, etc., to avoid the effect of wrong serialization

Active Publication Date: 2017-10-17
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such binauralization units often introduce unavoidable small errors, which are then amplified by imperfect crosstalk cancellation units leading to more coloration and false spatial perception

Method used

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  • An audio signal processing apparatus and method for filtering an audio signal
  • An audio signal processing apparatus and method for filtering an audio signal
  • An audio signal processing apparatus and method for filtering an audio signal

Examples

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Embodiment Construction

[0041] figure 1 A diagram of an audio signal processing device 100 according to an embodiment is shown. The audio signal processing device 100 is configured to filter the left channel input audio signal L to obtain the left channel output audio signal X 1 , and filter the right channel input audio signal R to obtain the right channel output audio signal X 2 .

[0042] The left channel outputs audio signal X 1 and the right channel output audio signal X 2 It is transmitted to the listener through an acoustic propagation path, wherein the transfer function of the acoustic propagation path is defined by an acoustic transfer function (Acoustic Transfer Function, ATF for short) matrix H.

[0043] The audio signal processing device 100 includes: a determiner 101, configured to determine a filter matrix C based on the ATF matrix H and a target ATF matrix VH, wherein the target ATF matrix VH includes a target transfer function of a target acoustic propagation path, so The target ...

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PUM

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Abstract

The invention relates to an audio signal processing apparatus (100) comprising a determiner (101) being configured to determine a filter matrix C on the basis of an acoustic transfer function matrix H and a target acoustic transfer function matrix VH, wherein the acoustic transfer function matrix H comprises transfer functions of acoustic propagation paths between loudspeakers and a listener and the target acoustic transfer function matrix VH comprises target transfer functions of target acoustic propagation paths, wherein the target acoustic propagation paths are defined by a target arrangement of virtual loudspeaker positions relative to the listener, a filter (103) being configured to filter the input audio signal on the basis of the filter matrix C to obtain filtered input audio signals, and a combiner (105) being configured to combine the filtered input audio signals to obtain output audio signals.

Description

technical field [0001] The invention relates to the field of audio signal processing. In particular, the present invention relates to an audio signal processing device and an audio signal filtering method for creating a virtual sound image. Background technique [0002] Reducing crosstalk within audio signals is important for most applications. For example, when a loudspeaker is used to reproduce a binaural audio signal for a listener, the listener's right ear usually also hears the audio signal intended for the listener's left ear. This effect, expressed as crosstalk, can be reduced by adding an inverse filter to the audio reproduction chain used to filter the audio signal. An inverse filter is also known in the art as a crosstalk cancellation unit. [0003] Mathematically, the inverse filter used to implement crosstalk cancellation can be expressed as a crosstalk cancellation filter matrix C. The purpose of crosstalk elimination is to select the crosstalk elimination b...

Claims

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Application Information

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IPC IPC(8): H04S1/00H04S3/00
CPCH04S1/002H04S3/002H04S2400/01H04S1/00H04S3/00H04R3/14H04S7/30H04S2420/01
Inventor 耶塞妮娅·拉库蒂尔·帕罗蒂
Owner HUAWEI TECH CO LTD
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