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

Echo time delay detection method

A technology of delay detection and echo, applied in speech analysis, telephone communication, instruments, etc., can solve the problems of inaccurate and inaccurate judgment, and achieve the effect of obvious, accurate and sensitive judgment.

Active Publication Date: 2019-04-26
GUANGZHOU AEBELL ELECTRICAL TECH
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the covariance method is used, when the characteristics of the spectrum are greatly different, it cannot be judged accurately, especially for the speech spectrum with low energy.

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
  • Echo time delay detection method
  • Echo time delay detection method
  • Echo time delay detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral Ground connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary. It can be said that the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations. The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] In the present invention, a method for echo delay detection is disclosed, which includes an audio receiving speaker and a microphone, and also includes the following steps: S1, after proces...

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 the field of audio signal processing, in particular to an echo time delay detection method. An audio receiving loudspeaker and a microphone are provided. The echo time delay detection method comprises the following steps: S1, segmentally processing a receiving signal acquired by the audio receiving loudspeaker to obtain a plurality of buffer queues Xi; S2, transforming a transmitting signal to be transmitted into a plurality of processing units Yi according to the same segments by the microphone; S3, implementing similarity calculation on the processing units Yi and the plurality of buffer queues Xi to obtain a maximum value covmax; and S4, performing calculation on each frame of data acquired by the microphone with a Gaussian model to obtain a maximum value f(max)of f(x), and comparing with covmax to obtain an echo time delay estimated value. According to the echo time delay detection method disclosed by the invention, an echo manner is judged comprehensivelyby the Gaussian model and a covariance, so that frequency spectrums with relatively large differences can be judged accurately; voice frequency spectrums with relatively low energy can be judged sensitively; and particularly a more remarkable effect is achieved specific to the echo problem of an interphone.

Description

technical field [0001] The invention relates to the field of audio signal processing, and more specifically, to a method for detecting echo delay. Background technique [0002] Echo is the most common problem in voice calls or voice conferences. Locally generated audio information is transmitted to the remote end through the network, and the remote audio signal is collected by the remote microphone to the remote system through reflection, and then transmitted to the remote system through the IP network. Local, after local playback, it is collected by the local microphone, thus forming a closed-loop positive feedback. When the delay is small, the signal is continuously strengthened, resulting in howling phenomenon. When the delay is large, an echo is generated. [0003] Instant messaging is generally for two-party or even multi-party real-time voice communication. Even if an external speaker is used to play sound in a highly demanding occasion, it is easy to produce an echo p...

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): H04M9/08G10L21/0208G10L21/0216G10L21/0224G10L21/0232
CPCG10L21/0208G10L21/0216G10L21/0224G10L21/0232G10L2021/02082H04M9/082Y02D30/70
Inventor 温才燚欧阳君子
Owner GUANGZHOU AEBELL ELECTRICAL TECH
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