Method for cancelling echo and related product
An echo and correlation technology, applied in two-way sound reinforcement telephone systems, speech analysis, instruments, etc., can solve problems such as errors, and achieve the effect of reducing interference and reducing the amount of data calculation
Pending Publication Date: 2022-04-15
SUIRUI TECH CO LTD
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the methods for delay time estimation in the prior art all have an error of one or two time frames, and in a scene with strong reverberation, it takes several seconds for the prior art to effectively estimate the delay of the reference signal and the microphone signal time
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0020] Embodiments will now be described with reference to the drawings. It should be understood that, where considered appropriate for simplicity and clarity of illustration, reference numerals may be repeated among the figures to indicate corresponding or analogous elements. Additionally, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein may be practiced without these specific details. In other instances, well-known methods, procedures, and components have not been described in detail so as not to obscure the embodiments described herein. Additionally, this description should not be taken as limiting the scope of the embodiments described herein.
[0021] As mentioned above, the solution for echo cancellation in the embodiment of the present invention is realized by estimating the delay time of th...
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
Login to View More Abstract
The invention provides a method for eliminating echoes and related products thereof, and the method comprises the steps: obtaining delay time estimation values of time frame levels of a microphone signal and a reference signal in echo elimination, and taking the delay time estimation values as a first delay time estimation result of echo elimination; time sample level delay time estimation values of a microphone signal and a reference signal in echo elimination are obtained to serve as a second delay time estimation result of echo elimination, and the time sample is obtained after the time frame is divided; determining a final estimation result of the delay time according to the first delay time estimation result and the second delay time estimation result; and performing echo cancellation operation by using the final estimation result. Through the scheme of the invention, the real-time performance and the accuracy of estimating the delay time in the echo cancellation operation are effectively ensured.
Description
technical field [0001] The present invention relates generally to the field of echoes. More specifically, the present invention relates to a method, device and computer-readable storage medium for echo cancellation. Background technique [0002] In order to ensure the call quality of the voice conferencing system, echo cancellation is one of the key technologies. At present, in the echo cancellation operation, the correlation between the collected reference signal and the microphone signal is usually used to design a dynamic filter, so as to realize the echo cancellation operation. However, two threads are usually used for signal acquisition in echo cancellation. Specifically, one thread is used to obtain a reference signal, and the other thread is used to obtain a microphone signal, wherein the reference signal comes from the source signal sent to the speaker for playback, and the microphone signal comes from the acoustic signal played by the speaker collected by the micr...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0224H04M9/08
CPCG10L21/0224H04M9/08
Inventor 何平樊晓辉蒋升
Owner SUIRUI TECH CO LTD