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

Method for discontinuous transmission of voice signals and generation of background noise

A background noise and speech signal technology, applied in the field of discontinuous transmission technology and comfortable background noise generation, can solve the problem of MELP vocoder that is not suitable for mixed excitation linear prediction

Active Publication Date: 2014-03-26
CHONGQING UNIV OF POSTS & TELECOMM
View PDF4 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In addition, the current CNG algorithm is based on the background noise generation algorithm of the simplified code excitation linear prediction CELP (Code Excited Linear Prediction) model, which is not suitable for the mixed excitation linear prediction MELP (Mixed Excitation Linear Prediction) vocoder

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 discontinuous transmission of voice signals and generation of background noise
  • Method for discontinuous transmission of voice signals and generation of background noise
  • Method for discontinuous transmission of voice signals and generation of background noise

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] In Embodiment 1 of the present invention, the entire discontinuous transmission process of the input speech signal is divided into three stages: a speech coding stage, a transition stage, and a noise coding stage. Each stage has its own frame type. The frame in the speech coding stage is the speech frame SPEECH, the frame in the transition stage is the transition frame SPEECH_H, and the frame in the noise coding stage has two types: silence description frame SID and non-transmission frame NO_TRANS.

[0024] The schematic diagram of the encoding and sending method of the SID frame is as follows: figure 2 shown. At the encoding end, the VAD algorithm is first used to judge whether the signal is a speech signal or a background noise signal. If it is a voice signal, it will enter the speech coding stage and work according to the normal speech coding method. If it is judged as a background noise signal, then the consecutive M frames starting from the first silent frame ar...

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 discontinuous transmission of voice signals and generation of background noise. The method comprises the steps that a transition frame is added when a voice frame is converted into a mute frame, and the frequency for sending a mute description frame is determined according to the size of fluctuating values of the background noise in the mute frame; at a decoding end, white noise is used as stimulus signals, and after a linear predictive coding resulting filter is passed through, comfortable noise is obtained through gain adjustment. The method for the discontinuous transmission of the voice signals and the generation of the background noise has good adaptivity when used for transmitting noise signals, and composite background noise has good continuity and comfortableness in subjective auditory sense.

Description

technical field [0001] The invention relates to the field of voice communication, more specifically, to a discontinuous transmission technology in voice coding and a method for generating comfortable background noise. Background technique [0002] In the process of voice communication, voice compression coding technology can reduce the bandwidth required for transmitting voice signals and increase the capacity of the communication system. Human beings do not speak for about 70% of the time during voice communication. If voice coding is always performed at one rate, it will be a waste of transmission channel resources, and channel resources are used in the communication field, especially in the wireless communication field. is extremely precious. [0003] In the prior art, in order to reduce this waste of resources, transmitted voice signal frames are divided into two types: voice frames and silent frames. Since the receiving end focuses on the useful speech signal, the bac...

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): G10L19/012
Inventor 李强谢虹恩张小红郑秋菊王丽珍夏绪玖明艳李云
Owner CHONGQING UNIV OF POSTS & TELECOMM
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