Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Audio system having reverberation reducing filter

A filter coefficient and audio technology, applied in PA systems, two-way PA telephone systems, sensors, etc., can solve problems such as the inability to effectively reduce reverberation distortion, and achieve the effect of reducing reverberation components

Inactive Publication Date: 2007-01-24
KONINKLIJKE PHILIPS ELECTRONICS NV
View PDF1 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A disadvantage of this known system is that it also cannot effectively reduce reverberation distortion in the desired audio signal sensed by the microphone array

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
  • Audio system having reverberation reducing filter
  • Audio system having reverberation reducing filter
  • Audio system having reverberation reducing filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] figure 1 System 1 is shown, which is suitable for suppressing audio distortion in a desired signal. The illustrated system has a loudspeaker 2 and a microphone array 3 comprising two microphones 3-1, 3-2. The audio output signal on output 4 is reproduced by loudspeaker 2 . A near-end source (not shown) generates the desired speech, which is received by array 3 as the desired speech signal. In addition, if figure 2 As explained in , the array 3 senses different kinds of distortions other than noise, echoes in the form of early (first part) reflections of the direct signal from the loudspeaker 2 to the array 3 and after a certain exponential decay (second part) the so-called Reflections in the form of reverberation, where reverberation is shown as the reverberation tail of a typical room impulse response, as a function of time. Each microphone 3-1, 3-2 may have an echo canceller g associated therewith 1 and g 2 , the echo cancellers are respectively coupled between...

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

A system (1) is described which is suited for suppressing audio distortion. The system comprises echo cancelling means g1, g2 coupled between an audio output (4) and a distorted desired audio sensing microphone array (3), and a filter arrangement (7) coupled to the echo cancelling means g1, g2 and / or the microphone array (3). The filter arrangements' coefficients represent reverberation distortion in the desired audio sensed by the microphone array (3).

Description

technical field [0001] The present invention relates to a system for suppressing audio distortion, comprising: [0002] - an echo canceling device coupled between the audio output and the array of distortion-desired-sound-sensing microphones, and [0003] - A filtering device coupled to the echo canceling means and / or the microphone array. [0004] The invention also relates to a filtering device applied to said system and to a method of suppressing audio distortion. Background technique [0005] Such a system is known from WO 97 / 45995. This known audio system includes an adaptive echo cancellation filter for canceling echoes between the system speaker output and the microphone. This known system has a filtering device coupled to the echo cancellation filter and the microphone for spectrally suppressing the echo components of the microphone signal which are not canceled by the echo cancellation filter. One microphone senses a desired audio signal, while the other microph...

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
IPC IPC(8): H04R3/02H04M1/60H04M9/08H04R3/00H04R27/00
CPCH04M9/082H04R3/02H04R3/005H04R27/00
Inventor D·A·C·M·鲁弗斯B·E·沙劳克哈
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com