Method for eliminating indoor reverberation

A technology of indoor reverberation and voice, applied in the field of signal processing, can solve problems such as increasing the amount of calculation and increasing the complexity of the algorithm, and achieve the effect of improving processing performance, improving the quality of auditory perception, and a simple and efficient method

Inactive Publication Date: 2015-05-27
DALIAN YOUJIA SOFTWARE TECH
View PDF0 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology can achieve real-time reverberation cancellation, it needs to divide the microphone voice into several parts and estimate the energy of the reverberation part, which will increase the complexity of the algorithm and increase the amount of calculation

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
  • Method for eliminating indoor reverberation
  • Method for eliminating indoor reverberation
  • Method for eliminating indoor reverberation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The functional block diagram of the present invention is as figure 1 As shown, the present invention includes a late stage reverberation power spectrum estimation module, a spectrum subtraction module, a sound / no sound detection module, an energy attenuation module and an adaptive spectral line enhancement module; the input of the late stage reverberation power spectrum estimation module is Reverberant voice, the output is connected with the spectrum subtraction module; the input of the spectrum subtraction module is the output of the reverberation voice and the late reverberation power spectrum estimation module, and the output is connected with the sound / no sound detection module; the sound / no sound detection module outputs The output selection of the control spectrum subtraction module can be connected with the energy attenuation module or the adaptive spectral line enhancement module; the energy attenuation module and the adaptive spectral line enhancement module out...

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 method for eliminating indoor reverberation and belongs to the technical field of signal processing. A later reverberation power spectrum estimation module, a spectrum subtraction module, a sound / sound-free detection module, an energy attenuation module and an adaptive spectrum line enhancement module are used in the method; input of the later reverberation power spectrum estimation module is a reverberation voice, and output of the later reverberation power spectrum estimation module is connected with the spectrum subtraction module; input of the spectrum subtraction module is the reverberation voice and the output of the later reverberation power spectrum estimation module, and output of the spectrum subtraction module is connected with the sound / sound-free detection module; output of the sound / sound-free detection module controls the output of the spectrum subtraction module to be selectively connected with the energy attenuation module or the adaptive spectrum line enhancement module; the energy attenuation module and the adaptive spectrum line enhancement module output a final enhanced voice.

Description

technical field [0001] The invention relates to a method for eliminating reverberation indoors, and belongs to the technical field of signal processing. Background technique [0002] Reverberation is an acoustic phenomenon produced by the reflection of sound waves in a room. If there is an appropriate amount of reverberation in the room, it can make the sound round and pleasant, and it sounds like a sense of space; if there is insufficient reverberation, the sound will be a little "dry" and sound unnatural; if the reverberation is too large, the sound will be vague unclear. In many occasions of sound collection, especially when the sound source is far away from the microphone, the audio signal collected by the microphone often contains a large reverberation sound, which will seriously affect the clarity and intelligibility of speech, and will also affect the follow-up Performance of audio processing systems (such as speech recognition systems, etc.). At this time, in orde...

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): G10L21/02
Inventor 盖丽
Owner DALIAN YOUJIA SOFTWARE TECH
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