Echo eliminating method and echo eliminating equipment
An echo cancellation and echo technology, applied in the field of sound processing, can solve the problems of large amount of calculation, high cost and complexity.
Active Publication Date: 2012-07-11
FUJIAN STAR NET EVIDEO INFORMATION SYST CO LTD
View PDF5 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The technical problem solved by the present invention is to provide an echo cancellation method and echo cancellation equipment, which can solve the defects in the prior art that it is necessary to build a hardware platform to eliminate echoes, and the cost is relatively high, or use complex software methods to eliminate echoes, and the computational complexity is large. technical problem
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] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.
[0021] see figure 1 , the present invention provides a method for echo cancellation, comprising the following steps,
[0022] S01: Obtain the echo coefficient, collect the playback audio, obtain the amplitude of the playback audio, and calculate the energy A of the playback data, collect the recorded audio, obtain the amplitude of the recorded audio, and calculate the energy B of the recorded data; S02: Compare whether the energy B of the recorded data is greater than the playback data energy A, if so, turn off the playback device and keep the recording device on; if not, turn off the recording device and keep the playback device on;
[0023] S03: Determine whether the call is over, if yes, end; if not, go to step S01.
[0024] The step ...
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 an echo eliminating method and echo eliminating equipment. The echo eliminating method comprises the following steps of: S01: collecting and calculating playing data energy A and collecting and calculating recording data energy B; S02: comparing whether the recording data energy B is more than the playing data energy A or not; if so, closing playing equipment and keeping recording equipment open; otherwise, closing the recording equipment and keeping the playing equipment open; S03: judging whether a call is finished or not; if so, finishing the method; otherwise, turning back to the step S01. The playing data energy is compared with the recording data energy so as to judge whether a current state is a playing state or a recording state; if the current state is the recording state, the playing equipment is closed; if the current state is the playing state, the recording equipment is closed; and therefore, echoes generated by the playing equipment cannot be collected by the recording equipment to be transmitted to a far end to generate the echoes due to the fact that the recording equipment is closed.
Description
technical field [0001] The invention relates to the field of sound processing, in particular to an echo cancellation method and an echo cancellation device. Background technique [0002] The Chinese patent application number 200610089544.5 discloses a method of echo cancellation, including: judging the echo state based on the short-term energy of the input signal: in the echo submerged state, the echo is eliminated by the locking filter; in the echo activation state, the sliding window offset is updated and tracking filter coefficients, and judge whether the tracking filter has completed locking according to the judgment criterion: if the locking is completed, the echo will be eliminated directly by the tracking filter, and the locking coefficient will be assigned to the locking filter; if the locking is not completed, then turn to Echo is canceled by the lock-in filter. In addition, the present invention also provides an echo canceling system capable of canceling near-end ...
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): H04M9/08
Inventor 王奎吴振文陈风
Owner FUJIAN STAR NET EVIDEO INFORMATION SYST CO LTD