CN110136736A - Echo cancellation system, method, device, equipment and storage medium - Google Patents

Abstract

The invention discloses an echo cancellation system, method, device, equipment and computer-readable storage medium. The system includes: a signal processing module connected to a power amplifier module for transmitting the first playback signal to the power amplifier module; the power amplifier module, Connected with the speaker, used to receive the transmitted first playback signal, and process the first playback signal to generate a second playback signal, and transmit the second playback signal to the speaker and the signal processing module; the speaker is used for Receive and play the second playback signal; the signal processing module is also used to receive and store the second playback signal; the sound collection module is connected to the signal processing module for collecting the sound signal and transmitting the sound signal To the signal processing module; the signal processing module is also used to receive the sound signal, and generate an echo cancellation signal after performing noise reduction processing on the sound signal according to the second playback signal, so as to ensure the thoroughness of the echo cancellation.

Description

An echo cancellation system, method, device, equipment and storage medium

technical field

The present invention relates to the field of sound processing, in particular to an echo cancellation system, method, device, equipment and computer-readable storage medium.

Background technique

During the communication between the communicating parties using speaker and microphone communication systems, in the case of using these systems, the speaker of the communicating party's communication device first outputs the voice of the communicating party, which comes from the communicating party's communication device. The voice of the other party outputted by the speaker of the communication device of the party of the call is picked up again by the microphone of the communication device of the party of the call, and sent to the communication device of the party of the call. The speaker of the communication device of the communication party outputs the voice of the communication party picked up at the side of the communication party. When such a process is repeated, both parties to the call will hear not only the other party's voice, but also his or her own voice repeated by the system in a phenomenon known as echo. When an echo is generated in this manner, the echo degrades the quality of the voice communication and prevents a smooth conversation between the callers.

Therefore, in the existing speaker and microphone communication systems, echo cancellation is usually required. The existing echo cancellation method is to obtain the playback signal output by the power amplifier, and then obtain the echo cancellation signal according to the collected microphone signal and the playback signal output by the power amplifier. The process of achieving echo cancellation.

However, in the process of implementing the present invention, the inventor found that: due to the processing of the power amplifier itself, there may be nonlinear distortion, so that the playback signal output by the power amplifier to the speaker has nonlinear distortion, resulting in the echo still existing in the acquired echo cancellation signal. The echo cancellation is not complete, and the user experience is not good.

Contents of the invention

In view of the above problems, the purpose of the present invention is to provide an echo cancellation system, method, device, equipment and computer-readable storage medium to ensure the thoroughness of echo cancellation.

In a first aspect, an embodiment of the present invention provides an echo cancellation system, including a signal processing module, a power amplifier module, a speaker, and a sound collection module;

The signal processing module is connected to the power amplifier module, and is used to transmit the first playback signal to the power amplifier module;

The power amplifier module is connected to the loudspeaker, and is used to receive the transmitted first playback signal, and process the first playback signal to generate a second playback signal, and transmit the second playback signal to the The speaker and the signal processing module;

The speaker is used to receive and play the second playback signal;

The signal processing module is further configured to receive and store the second playing signal;

The sound collection module is connected with the signal processing module, and is used to collect sound signals, and transmit the sound signals to the signal processing module; wherein, the sound signals include the sound signals sent by the user and the sound signals sent by the speaker the second playback signal;

The signal processing module is further configured to receive the sound signal, and generate an echo cancellation signal after performing noise reduction processing on the sound signal according to the second playing signal.

In the first implementation of the first aspect,

The signal processing module is specifically configured to obtain an echo cancellation signal according to a difference between the second playing signal and the sound signal.

In the second implementation manner of the first aspect, a signal transmission module is also included;

The signal transmission module is connected with the signal processing module, and is used for receiving the first playback signal transmitted by the communication terminal, and transmitting the first playback signal to the signal processing module.

According to the second implementation of the first aspect, in the third implementation of the first aspect,

The signal processing module is further configured to transmit the echo cancellation signal to the signal transmission module;

The signal transmission module is further configured to receive the echo cancellation signal, and transmit the echo cancellation signal to the corresponding communication terminal.

In the fourth implementation of the first aspect, a sound card module is also included;

The signal processing module is connected to the sound card module, and is specifically used to transmit the first playback signal to the sound card module;

The sound card module is connected to the power amplifier module and used to receive the first playback signal and transmit the first playback signal to the power amplifier module.

According to the fourth implementation of the first aspect, in the fifth implementation of the first aspect,

The sound collection module is connected to the sound card module, and is specifically used to transmit the sound signal to the sound card module;

The sound card module is also used to receive the sound signal and transmit the sound signal to the signal processing module.

According to the fourth implementation of the first aspect, in the sixth implementation of the first aspect,

The power amplifier module is specifically configured to transmit the second playback signal to the sound card module and the speaker;

The sound card module is further configured to receive the second playing signal, and transmit the playing signal to the signal processing module.

In a second aspect, an embodiment of the present invention provides an echo cancellation method, including the following steps:

Transmitting the first playback signal to the power amplifier module; wherein, the first playback signal is used to trigger the power amplifier module to generate a second playback signal transmitted to the speaker;

When receiving the second playback signal input by the power amplifier module, storing the second playback signal;

When the sound signal transmitted by the sound collection module is received, an echo cancellation signal is generated after performing noise reduction processing on the sound signal according to the second playback signal; wherein, the sound signal includes a sound signal sent by the user and a sound signal sent by the speaker Second playback signal.

In the first implementation manner of the second aspect, when the sound signal transmitted by the sound collection module is received, an echo cancellation signal is generated after performing noise reduction processing on the sound signal according to the second playback signal, specifically: :

When the sound signal collected by the sound collection module and transmitted by the sound card module is received, an echo cancellation signal is obtained according to the difference between the second playing signal and the sound signal.

In a second implementation manner of the second aspect, the first playback signal is transmitted by the communication terminal;

Then the echo cancellation method also includes:

and transmitting the echo cancellation signal to the corresponding communication terminal.

In a third implementation manner of the second aspect, the transmitting the first playback signal to the power amplifier module is specifically:

The first playback signal is transmitted to the power amplifier module through the sound card module.

In a fourth implementation manner of the second aspect, when the second playback signal input by the power amplifier module is received, the second playback signal is stored, specifically:

When receiving the second playing signal input by the power amplifier module through the sound card module, storing the second playing signal.

In a third aspect, an embodiment of the present invention provides an echo cancellation device, including:

The first playback signal transmission unit is configured to transmit the first playback signal to the power amplifier module; wherein the first playback signal is used to trigger the power amplifier module to generate a second playback signal transmitted to the speaker;

a second playback signal storage unit, configured to store the second playback signal when receiving the second playback signal input by the power amplifier module;

The echo cancellation unit is configured to, when receiving the sound signal transmitted by the sound collection module, generate an echo cancellation signal after performing sound cancellation processing on the sound signal according to the second playing signal; wherein the sound signal includes the sound signal sent by the user The sound signal and the second playback signal from the speaker.

In a first implementation manner of the third aspect, the echo cancellation unit specifically includes:

When the sound signal collected by the sound collection module and transmitted by the sound card module is received, an echo cancellation signal is obtained according to the difference between the second playing signal and the sound signal.

In the second implementation manner of the third aspect, the first playback signal is transmitted by the communication terminal;

Then the echo cancellation method also includes:

The echo signal transmission unit is configured to transmit the echo cancellation signal to the corresponding communication terminal.

In a third implementation manner of the third aspect, the first playback signal transmission unit specifically includes:

The first playback signal is transmitted to the power amplifier module through the sound card module.

In a fourth implementation manner of the third aspect, the second playback signal storage unit specifically includes:

When receiving the second playing signal input by the power amplifier module through the sound card module, storing the second playing signal.

In a fourth aspect, an embodiment of the present invention provides an echo cancellation device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and the processor executes the computer program The program implements the echo cancellation method for page elements as described in the second aspect.

In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium, the computer-readable storage medium includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled Execute the echo cancellation method as described in the second aspect.

Above embodiment has following beneficial effect:

The signal processing module acquires the second playback signal output by the power amplifier module during the process of transmitting the first playback signal to the power amplifier module so that the power amplifier module outputs the second playback signal to the speaker for playback. signal, and after receiving the sound signal collected by the sound collection module, perform noise reduction processing on the sound signal according to the second playback signal to generate an echo cancellation signal, and perform echo cancellation processing by acquiring the sound signal actually played by the speaker , to avoid the problem of incomplete echo cancellation caused by the nonlinear distortion of the power amplifier, effectively eliminate the echo, and improve the quality of sound playback.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings used in the implementation will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. As far as the skilled person is concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

Fig. 1 is a schematic structural diagram of an echo cancellation system provided by a first embodiment of the present invention.

Fig. 2 is a schematic flowchart of an echo cancellation method provided by a second embodiment of the present invention.

Fig. 3 is a schematic structural diagram of an echo cancellation device provided by a third embodiment of the present invention.

Fig. 4 is a schematic structural diagram of an echo cancellation device provided by a fourth embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Referring to FIG. 1 , the first embodiment of the present invention provides an echo cancellation system, including a signal processing module 111 , a power amplifier module 112 , a speaker 113 and a sound collection module 114 .

The signal processing module 111 is connected to the power amplifier module 112 and configured to transmit the first playback signal to the power amplifier module 112 .

In the embodiment of the present invention, the echo cancellation system further includes a signal transmission module 115, the signal transmission module 115 is connected to the signal processing module 111, and is used to receive the first playback signal transmitted by the communication terminal, and transmit the The first playback signal is transmitted to the signal processing module 111. It should be noted that the echo cancellation system realizes a wireless connection with the communication terminal through the signal transmission module 115. The wireless method includes but is not limited to the Internet, local area network, Any one of communication methods such as Bluetooth, Wi-Fi or ZigBee.

In the embodiment of the present invention, the signal processing module 111 can be a computing device such as a computer, a tablet computer, a mobile phone, an interactive smart tablet, a notebook computer, an MCU processing chip or a server, and the signal processing module 111 receives the signal transmission After the first playback signal transmitted by the module 115, the echo cancellation system further includes a sound card module 116, and the signal processing module 111 is connected to the sound card module 116, and is specifically used to transmit the first playback signal to Described sound card module 116, described sound card module 116, is connected with described power amplifier module 112, is used for receiving described first broadcast signal, and described first broadcast signal is transmitted to described power amplifier module 112, namely described signal The processing module 111 transmits the first playback signal to the power amplifier module 112 through the sound card module 116, the sound card module 116 is a hardware for mutual conversion of sound waves/digital signals, and the sound card module 116 transmits the The first playback signal is converted from a digital signal to a sound wave signal by a digital-to-analog converter (DAC) of the sound card module 116 .

The power amplifier module 112 is connected with the loudspeaker 113, and is used for receiving the transmitted first playback signal, and processing the first playback signal to generate a second playback signal, and transmitting the second playback signal to the speaker 113 and the signal processing module 111.

In the embodiment of the present invention, after the power amplifier module 112 receives the first playback signal transmitted by the sound card module 116, it processes the first playback signal to generate a second playback signal, and the power amplifier Module 112, its main function is to amplify the relatively weak first playback signal input through the sound card module, so as to generate a large enough current to drive the speaker to reproduce the sound, specifically, the power amplifier module 112 amplifies the first playback signal A playback signal is amplified to generate the second playback signal, and then the power amplifier module 112 transmits the second playback signal to the speaker 113 and the sound card module 116; the sound card module is also used to receive The second playback signal, after converting the second playback signal, transmits the playback signal to the signal processing module 111; the sound card module 116 is a hardware that realizes the mutual conversion of sound waves/digital signals , in an embodiment, the sound card module 116 converts the second playback signal from a sound wave signal to a digital signal through a digital-to-analog converter (DAC) of the sound card module 116 .

The speaker 113 is configured to receive and play the second playing signal.

In the embodiment of the present invention, the speaker 113 plays the second playing signal after receiving the second playing signal.

The signal processing module 111 is further configured to receive and store the second playback signal.

In the embodiment of the present invention, the signal processing module 111 stores the second playback signal after receiving the converted second playback signal transmitted via the sound card module 116 .

The sound collection module 114 is connected with the signal processing module 111, and is used to collect sound signals, and transmit the sound signals to the signal processing module 111; wherein, the sound signals include the sound signals sent by the user and The second playback signal sent by the speaker 113.

In the embodiment of the present invention, the sound collection module 114 collects sound signals transmitted in the air, since the sound collection module 114 cannot distinguish which sound signal needs to be collected and which sound signal The signal does not need to be collected, and the sound collection module 114 can only collect all the sound signals that can be collected in the air, so that the sound signal includes the sound signal sent by the user and the second playback signal sent by the speaker 113, so The sound collection module 114 is connected with the sound card module 116, and is specifically used for transmitting the sound signal to the sound card module 116 after collecting the sound signal; the sound card module 116 is also used for receiving the sound card module 116. Sound signal, and after described sound signal is converted, transmit to described signal processing module 111, described sound card module 116 is a kind of hardware that realizes sound wave/digital signal mutual conversion, in an embodiment, described sound card module 116 The sound signal is converted from a sound wave signal into a digital signal through the digital-to-analog converter (DAC) of the sound card module 116. It should be noted that the present application does not make any restrictions on the specific hardware structure of the sound collection module 114. For example, the sound collection module 114 can be a microphone, a microphone, etc., and a specific sound collection device can be selected according to actual conditions.

The signal processing module 111 is further configured to receive the sound signal, and generate an echo cancellation signal after performing noise reduction processing on the sound signal according to the second playing signal.

In the embodiment of the present invention, after receiving the sound signal transmitted by the sound card module 116, the signal processing module 111 performs noise reduction processing on the sound signal according to the stored second playback signal to generate an echo cancellation signal, specifically, the signal processing module 111 obtains an echo cancellation signal according to the difference between the second playing signal and the sound signal, and after obtaining the echo cancellation signal, the signal processing module 111 is further used to The echo cancellation signal is transmitted to the signal transmission module 115; the signal transmission module 115 is further configured to receive the echo cancellation signal, and transmit the echo cancellation signal to the corresponding communication terminal.

To sum up, the first embodiment of the present invention provides an echo cancellation system, the signal processing module 111 transmits the first playback signal to the power amplifier module 112, so that the power amplifier module 112 outputs the second playback signal In the process of playing the signal to the loudspeaker 113, the second playback signal output by the power amplifier module 112 is obtained, and after receiving the sound signal collected by the sound collection module 114, according to the second playback signal The sound signal is subjected to noise reduction processing to generate an echo cancellation signal, and the echo cancellation processing is performed by acquiring the sound signal actually played by the speaker 113, so as to avoid the problem of incomplete echo cancellation caused by the nonlinear distortion of the power amplifier, effectively eliminate the echo, and improve sound playback. quality.

Please refer to FIG. 2 , the second embodiment of the present invention provides an echo cancellation method, which can be performed by an echo cancellation device, and includes the following steps:

S11. Transmit the first playback signal to the power amplifier module; wherein the first playback signal is used to trigger the power amplifier module to generate a second playback signal that is transmitted to the speaker.

S12. When receiving the second playback signal input by the power amplifier module, store the second playback signal.

S13. When receiving the sound signal transmitted by the sound collection module, perform noise reduction processing on the sound signal according to the second playback signal to generate an echo cancellation signal; wherein the sound signal includes a sound signal sent by the user and a speaker The second playback signal emitted.

In the embodiment of the present invention, the echo cancellation device is the signal processing module in the echo cancellation system, and the echo cancellation device can be a computer, a tablet computer, a mobile phone, an interactive smart tablet, a notebook computer or a server, etc. In a computing device, the echo cancellation method is integrated in the echo cancellation device as one of its functions.

In the first implementation manner of the second embodiment, the S13 is specifically:

When the sound signal collected by the sound collection module and transmitted by the sound card module is received, an echo cancellation signal is obtained according to the difference between the second playing signal and the sound signal.

In a second implementation manner of the second embodiment, the first playback signal is transmitted by the communication terminal.

Then the echo cancellation method also includes:

and transmitting the echo cancellation signal to the corresponding communication terminal.

In the third implementation manner of the second embodiment, the S11 is specifically:

The first playback signal is transmitted to the power amplifier module through the sound card module.

In the fourth implementation manner of the second embodiment, the S12 is specifically:

When receiving the second playing signal input by the power amplifier module through the sound card module, storing the second playing signal.

Referring to Fig. 3, the third embodiment of the present invention provides an echo cancellation device, including:

The first playback signal transmission unit 21 is configured to transmit the first playback signal to the power amplifier module; wherein the first playback signal is used to trigger the power amplifier module to generate a second playback signal transmitted to the speaker.

The second playing signal storage unit 22 is configured to store the second playing signal when receiving the second playing signal input by the power amplifier module.

The echo canceling unit 23 is configured to generate an echo canceling signal after receiving the sound signal transmitted by the sound collection module according to the second playback signal after performing sound cancellation processing on the sound signal; wherein the sound signal includes the sound signal sent by the user sound signal and the second playback signal from the speaker.

In the first implementation manner of the third embodiment, the echo cancellation unit specifically includes:

When the sound signal collected by the sound collection module and transmitted by the sound card module is received, an echo cancellation signal is obtained according to the difference between the second playing signal and the sound signal.

In a second implementation manner of the third embodiment, the first playback signal is transmitted by the communication terminal.

Then the echo cancellation method also includes:

The echo signal transmission unit is configured to transmit the echo cancellation signal to the corresponding communication terminal.

In a third implementation of the third embodiment, the first playback signal transmission unit specifically includes:

The first playback signal is transmitted to the power amplifier module through the sound card module.

In a fourth implementation manner of the third embodiment, the second playback signal storage unit specifically includes:

When receiving the second playing signal input by the power amplifier module through the sound card module, storing the second playing signal.

It should be noted that the device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physically separated. A unit can be located in one place, or it can be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that they have a communication connection, which can be specifically implemented as one or more communication buses or signal lines. It can be understood and implemented by those skilled in the art without creative effort.

Referring to FIG. 4 , it is a schematic diagram of an echo cancellation device provided by a fourth embodiment of the present invention. The echo cancellation device of this embodiment includes: at least one processor 11, such as CPU, at least one network interface 14 or other user interfaces 13, memory 15, at least one communication bus 12, and the communication bus 12 is used to realize the connection between these components communication. Wherein, the user interface 13 may optionally include a USB interface, other standard interfaces, and a wired interface. The network interface 14 may optionally include a Wi-Fi interface and other wireless interfaces. The memory 15 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 15 may optionally include at least one storage device located away from the aforementioned processor 11 .

In some embodiments, the memory 15 stores the following elements, executable modules or data structures, or their subsets, or their extended sets:

The operating system 151 includes various system programs for realizing various basic services and processing hardware-based tasks;

Procedure 152.

Specifically, the processor 11 is configured to call the program 152 stored in the memory 15 to execute the echo cancellation method described in the above embodiment, such as step S11 shown in FIG. 2 . Alternatively, when the processor executes the computer program, it realizes the functions of the modules/units in the above device embodiments, for example, the first playback signal transmission unit.

Exemplarily, the computer program may be divided into one or more modules/units, and the one or more modules/units are stored in the memory and executed by the processor to complete the present invention. The one or more modules/units may be a series of computer program instruction segments capable of accomplishing specific functions, and the instruction segments are used to describe the execution process of the computer program in the echo cancellation device.

The echo cancellation device may be computing devices such as desktop computers, notebooks, palmtop computers, and cloud servers. The echo cancellation device may include, but not limited to, a processor and a memory. Those skilled in the art can understand that the schematic diagram is only an example of the echo canceling device, and does not constitute a limitation to the echo canceling device, and may include more or less components than those shown in the figure, or combine certain components, or have different Components, for example, the echo cancellation device may also include an input and output device, a network access device, a bus, and the like.

The so-called processor 11 may be a central processing unit (Central Processing Unit, CPU), and may also be other general-purpose processors, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), Off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc., the processor 11 is the control center of the echo canceling device, and uses various interfaces and lines to connect the various components of the entire echo canceling device. part.

The memory 15 can be used to store the computer programs and/or modules, and the processor 11 runs or executes the computer programs and/or modules stored in the memory 15, and calls the data stored in the memory 15, Various functions of the echo cancellation device are realized. The memory may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function, etc.; the data storage area may store data created according to the use of the mobile phone, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, internal memory, plug-in hard disk, smart memory card (Smart Media Card, SMC), secure digital (Secure Digital, SD) card , a flash memory card (Flash Card), at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

Wherein, if the integrated modules/units of the echo cancellation device are realized in the form of software function units and sold or used as independent products, they may be stored in a computer-readable storage medium. Based on this understanding, the present invention realizes all or part of the processes in the methods of the above embodiments, and can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer When the program is executed by the processor, the steps in the above-mentioned various method embodiments can be realized. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer memory, and a read-only memory (ROM, Read-Only Memory) , Random Access Memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, computer-readable media Excludes electrical carrier signals and telecommunication signals.

The above description is a preferred embodiment of the present invention, and it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered Be the protection scope of the present invention.

Claims (11)

1. a kind of echo cancellation system, which is characterized in that received including signal processing module, power amplifier module, loudspeaker and sound Collect module；

The signal processing module is connect with the power amplifier module, for the first play signal to be transferred to the power amplifier module；

The power amplifier module is connect with the loudspeaker, for receiving the first play signal of transmission, and is broadcast to described first Discharge signal is handled, and to generate the second play signal, and second play signal is transferred to the loudspeaker and institute State signal processing module；

The loudspeaker, for receiving and playing second play signal；

The signal processing module is also used to receive and store second play signal；

The sound collecting module, connect with the signal processing module, is used for collected sound signal, and by the voice signal It is transferred to the signal processing module；Wherein, the voice signal includes that the voice signal of user's sending and loudspeaker issue Second play signal；

The signal processing module is also used to receive the voice signal, and according to second play signal to the sound Signal generates echo cancellation signal after carrying out noise reduction processing.

2. echo cancellation system according to claim 1, which is characterized in that

The signal processing module is specifically used for the difference according to second play signal and the voice signal, obtains back Sound eliminates signal.

3. echo cancellation system according to claim 1, which is characterized in that further include signal transmission module；

The signal transmission module is connect with the signal processing module, for receiving the first play signal of communication ends transmission, And first play signal is transferred to the signal processing module.

4. echo cancellation system according to claim 3, which is characterized in that

The signal processing module is also used to the echo cancellation signal being transferred to the signal transmission module；

The signal transmission module, is also used to receive the echo cancellation signal, and the echo cancellation signal is transferred to pair The communication ends answered.

5. echo cancellation system according to claim 1, which is characterized in that further include sound card module；

The signal processing module is connect with the sound card module, described specifically for first play signal to be transferred to Sound card module；

The sound card module is connect with the power amplifier module, is played for receiving first play signal, and by described first Signal is transferred to the power amplifier module.

6. echo cancellation system according to claim 5, which is characterized in that

The sound collecting module, connect with the sound card module, is specifically used for the transmission of sound signals to the sound card Module；

The sound card module is also used to receive the voice signal, and gives the transmission of sound signals to the signal processing mould Block.

7. echo cancellation system according to claim 5, which is characterized in that

The power amplifier module, specifically for second play signal is transferred to the sound card module and the loudspeaker；

The sound card module is also used to receive second play signal, and the play signal is transferred at the signal Manage module.

8. a kind of echo removing method based on echo cancellation system described in claim 1 to 7 any one, feature exist In, comprising the following steps:

First play signal is transferred to power amplifier module；Wherein, first play signal is raw for triggering the power amplifier module At the second play signal for being transmitted to loudspeaker；

When receiving second play signal inputted by the power amplifier module, second play signal is stored；

When receiving the voice signal transmitted by sound acquisition module, according to second play signal to the voice signal Echo cancellation signal is generated after carrying out noise reduction processing；Wherein, the voice signal includes the voice signal and loudspeaking that user issues The second play signal that device issues.

9. a kind of echo eliminating device characterized by comprising

First play signal transmission unit, for the first play signal to be transferred to power amplifier module；Wherein, described first letter is played It number generates for triggering the power amplifier module and to be transmitted to the second play signal of loudspeaker；

Second play signal storage unit, for when receiving second play signal inputted by the power amplifier module, Store second play signal；

Echo cancellation unit, for being played according to described second when receiving the voice signal transmitted by sound acquisition module Signal generates echo cancellation signal after carrying out noise reduction processing to the voice signal；Wherein, the voice signal includes user's hair The second play signal that voice signal and loudspeaker out issues.

10. a kind of echo cancellation equipment, including processor, memory and storage in the memory and are configured as by institute The computer program of processor execution is stated, the processor is realized as claimed in claim 8 when executing the computer program The echo removing method of page elements.

11. a kind of computer readable storage medium, which is characterized in that the computer readable storage medium includes the calculating of storage Machine program, wherein equipment where controlling the computer readable storage medium in computer program operation is executed as weighed Benefit require 8 described in echo removing method.