Noise suppressing apparatus, noise suppressing method and mobile phone

A technology of noise suppression and suppression part, which is applied in the field of noise suppression devices, can solve the problems of distinction and inability to obtain accurate noise levels, and achieve the effect of reducing the deterioration of sound quality

Inactive Publication Date: 2010-01-13
FUJITSU LTD
View PDF0 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the noise suppressing device with the above configuration estimates the surrounding noise level based on only the sound signal from one sound receiving unit 101, and does not distinguish the sound from the target sound source from other sounds.
Therefore, the conventional noise suppression device has the following problem: when estimating the noise level, the sound from the target sound source may also be included in it, and when the noise level is estimated from the sound that is not noise, the accurate noise level cannot be obtained.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Noise suppressing apparatus, noise suppressing method and mobile phone
  • Noise suppressing apparatus, noise suppressing method and mobile phone
  • Noise suppressing apparatus, noise suppressing method and mobile phone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0033] Next, a related mobile phone according to Embodiment 1 will be described. Figure 1A and Figure 1B It is a schematic diagram showing the configuration of the mobile phone according to the first embodiment. Figure 1A shows a perspective view of the appearance of the mobile phone 10, Figure 1B A side view of the casing having the operation unit 4 of the mobile phone 10 seen from the front side is shown in .

[0034]The mobile phone 10 according to Embodiment 1 is a foldable mobile phone in which a first housing 10a having a display unit 5 and a second housing 10b having an operation unit 4 are connected by a hinge 10c. It should be noted that the noise suppressing device disclosed in this application is also applicable to mobile phones other than folding mobile phones and other voice input devices.

[0035] The mobile phone 10 has a speaker 8a at the end of the housing 10a opposite to the connecting portion of the hinge 10c. Furthermore, the mobile phone 10 has two...

Embodiment approach 2

[0081]Next, a mobile phone related to Embodiment 2 will be described. The mobile phone according to the second embodiment can be realized by the same structure as the mobile phone 10 according to the first embodiment described above, and therefore the same structures are given the same reference numerals and their descriptions are omitted.

[0082] The mobile phone 10 according to Embodiment 1 above estimates the surrounding noise level based on sounds coming from directions other than the target sound source direction. In contrast, in the mobile phone 10 according to the second embodiment, the difference between the signal level of the audio signal acquired by the first audio input unit 6 and the signal level of the audio signal acquired by the second audio input unit 7 is less than a predetermined value. The level of the sound component at the time is used to estimate the surrounding noise level.

[0083] Sound coming from near the front of the mobile phone 10 (the front of...

Embodiment approach 3

[0101] Next, a mobile phone according to Embodiment 3 will be described. The mobile phone according to the third embodiment can be realized by the same structure as the mobile phone 10 according to the first embodiment described above, and therefore the same structures are given the same reference numerals and their descriptions are omitted.

[0102] The mobile phone 10 according to Embodiment 1 above estimates the surrounding noise level based on sounds coming from directions other than the direction of the target sound source, regardless of whether the target sound source is uttering sound. On the other hand, mobile phone 10 according to Embodiment 3 estimates the surrounding noise level based on sounds from directions other than the direction of the target sound source when the target sound source is speaking, and estimates the surrounding noise level when the target sound source is not speaking. Next, the surrounding noise level is estimated from sounds from all directions...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a noise suppressing device and a method for suppressing a sound signal from a direction other than a given direction in sound signals obtained by receiving sounds from a plurality of directions, and a mobile phone provided with the noise suppressing device. The noise suppressing device includes a first and a second sound receiving parts receiving sounds from a plurality of directions containing a sound from a direction of a given sound source and converting the sounds to digital sound signals in a time domain, respectively; an estimating part acquiring both direction information on a direction of the given sound source and distance information on a distance from the given sound source based upon the digital sound signals converted by the sound receiving parts, and estimating a component value of a noise component contained in the signal by use of the direction information and the distance information; and a controlling part acquiring a control value of a suppression amount for controlling a range of a direction of the digital sound signals.

Description

technical field [0001] The present invention relates to a noise suppressing device, a mobile phone having the noise suppressing device, and a noise suppressing method. sound signal. Background technique [0002] A microphone array device has been developed that has a plurality of sound receivers such as condenser microphones that receive sounds and convert them into sound signals and output them, and perform various sound processing based on the sound signals output from each sound receiver. . Some microphone array devices perform synchronous addition processing for emphasizing a target sound by synchronizing and adding individual audio signals output from each audio receiving unit. In addition, some microphone array devices perform synchronization subtraction processing in which each audio signal is synchronized and subtracted from the other to form a blind spot for noise sources for noise suppression (see, for example, Non-Patent Document 1). [0003] The microphone arr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02G10L21/0208G10L21/0216H04M1/00
CPCG10L21/0208G10L2021/02166G10L21/0216G10L21/0224G10L2021/02165
Inventor 早川昭二松尾直司
Owner FUJITSU LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap