CN111031449A - Intelligent product for eliminating echo during call - Google Patents
Intelligent product for eliminating echo during call Download PDFInfo
- Publication number
- CN111031449A CN111031449A CN201911368731.0A CN201911368731A CN111031449A CN 111031449 A CN111031449 A CN 111031449A CN 201911368731 A CN201911368731 A CN 201911368731A CN 111031449 A CN111031449 A CN 111031449A
- Authority
- CN
- China
- Prior art keywords
- module
- switch
- analog signal
- cpu
- call
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005236 sound signal Effects 0.000 claims abstract description 55
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 230000003321 amplification Effects 0.000 claims abstract description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 8
- 241000209140 Triticum Species 0.000 claims description 5
- 235000021307 Triticum Nutrition 0.000 claims description 5
- 230000002457 bidirectional effect Effects 0.000 claims description 2
- 238000012952 Resampling Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
- G10L21/0224—Processing in the time domain
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L2021/02082—Noise filtering the noise being echo, reverberation of the speech
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
- G10L2021/02161—Number of inputs available containing the signal or the noise to be suppressed
- G10L2021/02165—Two microphones, one receiving mainly the noise signal and the other one mainly the speech signal
Landscapes
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Human Computer Interaction (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Quality & Reliability (AREA)
- Computational Linguistics (AREA)
- Multimedia (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Telephone Function (AREA)
Abstract
The invention relates to an intelligent product for eliminating echo in a call, wherein a 6-microphone array module samples sound and synthesizes the sound and then transmits the sound to a CPU; the CPU resamples the data received from the 6-microphone array module and outputs the data to a first coder; the output of the first codec is connected with the first switching end of the analog signal switch. The microphone module acquires a sound signal and transmits the sound signal to the second coder, the second coder codes and outputs the sound signal to the conversation module, the conversation module outputs the sound signal to the second coder for decoding, and the decoding output of the second coder is connected with the second switching end of the analog signal switching switch. The common end of the analog signal switch is connected with the power amplification module, and the output end of the power amplification module is connected with the loudspeaker. When a telephone is received, the second switching end of the analog signal switching switch is communicated with the public end, the audio signal link is switched to be the second audio signal link, the audio signal does not undergo resampling through the CPU at the moment, the transmission time is short, and the requirement of echo cancellation is met.
Description
Technical Field
The invention relates to the technical field of intelligent products for eliminating echo during communication.
Background
As shown in fig. 1, the intelligent product based on the android system has a 4G call module, a CPU and a 6-microphone array module, and a Near-end-To-Far-end (Far To Near) audio signal link of the 4G call is: firstly, the 6-microphone array module performs ADC sampling and voice synthesis, then enters the CPU for resampling, and then is transmitted to the communication module, and the consumed time is 10ms + 2-200 ms +2 ms. The Far-end To Near-end (Near To Far) audio signal link for a 4G call is: the conversation module transmits audio signal for CPU, and then CPU resamples, transmits CODEC (coder decoder) through I2S again, and rethread power amplifier module (PA) and play through Speaker (SPK), consuming time is: 2ms + 2-200 ms +1ms +1ms +1 ms. In the mode, the time of the whole link is too long, the 4G communication module has time interval requirements on echo cancellation, audio signals of two audio signal links are resampled and transferred through the CPU, the CPU has different tasks at each time, 2-200 ms delay can be generated, the maximum time can even exceed 400ms, echoes are directly caused in communication, and the use experience is not good enough.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the intelligent product for eliminating the echo during the call is provided, and the echo can be effectively eliminated during the call.
The technical scheme adopted by the invention for solving the technical problems is as follows: an intelligent product for eliminating echo during call is provided with a call module, a CPU, a 6 microphone array module, an analog signal change-over switch, a first codec, a second codec, a microphone module, a power amplifier module and a loudspeaker.
The 6 wheat array module samples sound and synthesizes the sound and then transmits the sound to the CPU; the CPU resamples the data received from the 6-microphone array module and outputs the data to a first coder; the output of the first codec is connected with the first switching end of the analog signal switch.
The microphone module acquires a sound signal and transmits the sound signal to the second codec, the second codec codes and outputs the sound signal to the communication module, the communication module outputs the sound signal to the second codec for decoding, and the decoding output of the second codec is connected with the second switching end of the analog signal switch.
The common end of the analog signal switch is connected with the power amplification module, and the output end of the power amplification module is connected with the loudspeaker.
Specifically, a first audio signal link is formed when a first switching end of the analog signal switch is communicated with a common end thereof, and transmission of the first audio signal link is as follows in sequence: the device comprises a 6 microphone array module, a CPU, a first codec, an analog signal switch, a power amplifier module and a loudspeaker.
Specifically, when the second switching end of the analog signal switch is communicated with the common end thereof, a second audio signal link is formed, and the transmission sequence of the second audio signal link is as follows: the microphone module, the second codec, the conversation module, the second codec, analog signal change over switch, power amplifier module and speaker.
Preferably, the CPU outputs a switch switching signal to the analog signal switching switch.
Preferably, the CPU transmits a switch switching signal to the analog signal switch through a GPIO interface.
Preferably, the CPU is a processor with an android framework module.
Preferably, the communication module is in bidirectional transmission with the CPU through a USB.
Preferably, the call module is a 4G call module.
The invention has the beneficial effects that: the two audio signal links are switched by an analog signal switch, and share the power amplifier module and the loudspeaker in a time-sharing multiplexing mode. When a telephone is received, the second switching end of the analog signal switching switch is communicated with the public end, the audio signal link is switched to be the second audio signal link, the audio signal does not undergo resampling by the CPU at the moment, the transmission time is short, and the requirement of echo cancellation is met.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a functional block diagram of an audio signal link of a prior art smart product; (ii) a
FIG. 2 is a functional block diagram of the audio signal link of the smart product of the present invention;
Detailed Description
The invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 2, an intelligent product for eliminating echo during a call includes a call module, a CPU, a 6-microphone array module, an analog signal switch, a first codec, a second codec, a microphone module, a power amplifier module, and a speaker. The call module can be preferably a 4G call module. The CPU may preferably be a processor having an Android (Android) framework module. The communication module can preferably transmit with the CPU in both directions through USB.
The 6 wheat array module samples sound and synthesizes the sound and then transmits the sound to the CPU; the CPU resamples the data received from the 6-microphone array module and outputs the data to a first coder; the output of the first codec is connected with the first switching end of the analog signal switch. The microphone module acquires a sound signal and transmits the sound signal to the second codec, the second codec codes and outputs the sound signal to the communication module, the communication module outputs the sound signal to the second codec for decoding, and the decoding output of the second codec is connected with the second switching end of the analog signal switch. The common end of the analog signal switch is connected with the power amplification module, and the output end of the power amplification module is connected with the loudspeaker.
When the first switching end of the analog signal switching switch is communicated with the public end thereof, a first audio signal link is formed, and the transmission of the first audio signal link is as follows in sequence: the device comprises a 6 microphone array module, a CPU, a first codec, an analog signal switch, a power amplifier module and a loudspeaker.
When the second switching end of the analog signal switching switch is communicated with the common end thereof, a second audio signal link is formed, and the transmission sequence of the second audio signal link is as follows: the microphone module, the second codec, the conversation module, the second codec, analog signal change over switch, power amplifier module and speaker.
Preferably, the 6-microphone array module is transmitted to the CPU through I2SO, and the CPU is transmitted to the first codec through I2S 1. Preferably, the CPU transmits a switch switching signal to the analog signal switch through a GPIO interface. The analog signal change-over switch is switched from a state that a first switching end of the analog signal change-over switch is communicated with a public end of the analog signal change-over switch to a state that a second switching end of the analog signal change-over switch is communicated with the public end of the analog signal change-over switch when receiving a switch change-over signal, or the analog signal change-over switch is switched from a state that the second switching end of the analog signal change-over switch is communicated with the public end of the analog signal change-over switch to a state that the first switching end of the analog signal change-over switch is communicated with the public end of.
The audio signal link of the intelligent product of the invention has two. First audio signal link: the 6 wheat array module samples and synthesizes the back to sound and transmits for CPU through I2S0, CPU transmits for first codec through I2S1 after will follow the data that 6 wheat array module received after resampling, and when analog signal change over switch' S first switch end and public end intercommunication, the output of first codec is transmitted to the power amplifier module through analog signal change over switch, and the rethread speaker is broadcast.
Second audio signal link: the microphone module acquires a sound signal and transmits the sound signal to the second codec, the second codec codes and outputs the sound signal to the call module, the call module outputs the sound signal to the second codec for decoding, and when the second switching end of the analog signal switch is communicated with the public end, the output of the second codec is transmitted to the power amplifier module through the analog signal switch and then played through the loudspeaker.
The two audio signal links are switched by an analog signal switch, and share the power amplifier module and the loudspeaker in a time-sharing multiplexing mode. The audio signals of the two audio signal links are transmitted separately, so that the time can be shortened, and the echo is effectively eliminated during 4G call. When a telephone is received, the second switching end of the analog signal switching switch is communicated with the public end, the audio signal link is switched to be the second audio signal link, the audio signal does not undergo resampling by the CPU at the moment, the transmission time is short, and the requirement of echo cancellation is met.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. An intelligent product for eliminating echo during a call, comprising: the microphone comprises a communication module, a CPU, a 6-microphone array module, an analog signal change-over switch, a first codec, a second codec, a microphone module, a power amplifier module and a loudspeaker;
the 6 wheat array module samples sound and synthesizes the sound and then transmits the sound to the CPU; the CPU resamples the data received from the 6-microphone array module and outputs the data to a first coder; the output of the first coder is connected with a first switching end of an analog signal switch;
the microphone module acquires a sound signal and transmits the sound signal to a second coder, the second coder codes and outputs the sound signal to the call module, the call module outputs the sound signal to the second coder for decoding, and the decoding output of the second coder is connected with a second switching end of the analog signal switch;
the common end of the analog signal switch is connected with the power amplification module, and the output end of the power amplification module is connected with the loudspeaker.
2. A smart product for canceling echo during a call as recited in claim 1, wherein: when the first switching end of the analog signal switching switch is communicated with the public end thereof, a first audio signal link is formed, and the transmission of the first audio signal link is as follows in sequence: the device comprises a 6 microphone array module, a CPU, a first codec, an analog signal switch, a power amplifier module and a loudspeaker.
3. A smart product for canceling echo during a call as recited in claim 1, wherein: when the second switching end of the analog signal switching switch is communicated with the common end thereof, a second audio signal link is formed, and the transmission sequence of the second audio signal link is as follows: the microphone module, the second codec, the conversation module, the second codec, analog signal change over switch, power amplifier module and speaker.
4. A smart product for canceling echo during a call as recited in claim 1, wherein: the CPU outputs a switch switching signal to the analog signal switching switch.
5. An intelligent product for canceling echo during a call as recited in claim 4, wherein: and the CPU transmits a switch switching signal to the analog signal switching switch through a GPIO interface.
6. A smart product for canceling echo during a call as recited in claim 1, wherein: the CPU is a processor with an android frame module.
7. A smart product for canceling echo during a call as recited in claim 1, wherein: the communication module is in bidirectional transmission with the CPU through the USB.
8. A smart product for canceling echo during a call as recited in claim 1, wherein: the communication module is a 4G communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911368731.0A CN111031449A (en) | 2019-12-26 | 2019-12-26 | Intelligent product for eliminating echo during call |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911368731.0A CN111031449A (en) | 2019-12-26 | 2019-12-26 | Intelligent product for eliminating echo during call |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111031449A true CN111031449A (en) | 2020-04-17 |
Family
ID=70214784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911368731.0A Pending CN111031449A (en) | 2019-12-26 | 2019-12-26 | Intelligent product for eliminating echo during call |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111031449A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080130907A1 (en) * | 2006-12-01 | 2008-06-05 | Kabushiki Kaisha Toshiba | Information processing apparatus and program |
| CN101651732A (en) * | 2008-08-12 | 2010-02-17 | 索尼株式会社 | Handsfree call apparatus, acoustic reproducing apparatus with handsfree call function, and handsfree call method |
| CN102568494A (en) * | 2012-02-23 | 2012-07-11 | 贵阳朗玛信息技术股份有限公司 | Optimized method, device and system for eliminating echo |
| JP5343843B2 (en) * | 2009-12-24 | 2013-11-13 | アイコム株式会社 | Noise reduction apparatus, noise reduction method and program |
| CN107734100A (en) * | 2017-11-08 | 2018-02-23 | 陕西中联电科电子有限公司 | A kind of more voice converged communication system based on Android platform |
| CN108449506A (en) * | 2018-03-12 | 2018-08-24 | 广东欧珀移动通信有限公司 | Voice communication data processing method, device, storage medium and mobile terminal |
| CN207869344U (en) * | 2017-12-29 | 2018-09-14 | 深圳市卓翼科技股份有限公司 | Adaptive source of sound selection circuit |
-
2019
- 2019-12-26 CN CN201911368731.0A patent/CN111031449A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080130907A1 (en) * | 2006-12-01 | 2008-06-05 | Kabushiki Kaisha Toshiba | Information processing apparatus and program |
| US20130158990A1 (en) * | 2006-12-01 | 2013-06-20 | Kabushiki Kaisha Toshiba | Information processing apparatus and program |
| CN101651732A (en) * | 2008-08-12 | 2010-02-17 | 索尼株式会社 | Handsfree call apparatus, acoustic reproducing apparatus with handsfree call function, and handsfree call method |
| JP5343843B2 (en) * | 2009-12-24 | 2013-11-13 | アイコム株式会社 | Noise reduction apparatus, noise reduction method and program |
| CN102568494A (en) * | 2012-02-23 | 2012-07-11 | 贵阳朗玛信息技术股份有限公司 | Optimized method, device and system for eliminating echo |
| CN107734100A (en) * | 2017-11-08 | 2018-02-23 | 陕西中联电科电子有限公司 | A kind of more voice converged communication system based on Android platform |
| CN207869344U (en) * | 2017-12-29 | 2018-09-14 | 深圳市卓翼科技股份有限公司 | Adaptive source of sound selection circuit |
| CN108449506A (en) * | 2018-03-12 | 2018-08-24 | 广东欧珀移动通信有限公司 | Voice communication data processing method, device, storage medium and mobile terminal |
Non-Patent Citations (1)
| Title |
|---|
| 田少勃: "声学回声消除的DSP硬件实现", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU704782B2 (en) | Portable telephone set having wireless electroacoustic transducer | |
| EP1229747A3 (en) | Mobile phone terminal, and peripheral unit for acoustic test of mobile phone terminal | |
| ES8601604A1 (en) | Handsfree circuit for telephone instrument. | |
| KR100408738B1 (en) | Mobile terminal having effect sound/background sound output function by using engaged key button | |
| CN111031449A (en) | Intelligent product for eliminating echo during call | |
| US4392243A (en) | Transceiver having interphone system | |
| EP0763922A3 (en) | A simultaneous multidirectional communication apparatus | |
| CN202998253U (en) | Howling elimination system and hand-free phone | |
| CN207530818U (en) | A kind of intercom system based on WIFI | |
| CN213043680U (en) | Bluetooth conversion answering control circuit | |
| CN103037121A (en) | Squeaking elimination method and squeaking elimination system and hand-free phone | |
| US5852774A (en) | Sidetone level reduction circuit and method | |
| CN103841279A (en) | Bus-based multi-party communication digital telephone system | |
| CN211404055U (en) | Device for realizing call in windows system | |
| JPH10173745A (en) | Car audio | |
| ATE453148T1 (en) | DEVICE WITH VOICE SIGNAL AND CONTROL SIGNAL INPUT DEVICE | |
| JP3071731B2 (en) | Mobile phone connection device | |
| JP2004147266A (en) | Bluetooth adapter for telephone set | |
| JP2002314465A (en) | Hands-free phone | |
| JP2580697Y2 (en) | Intercom equipment | |
| JP3428880B2 (en) | Intercom equipment | |
| JP2002209021A (en) | Wireless interphone system | |
| JP3545596B2 (en) | Loudspeaker intercom system | |
| JPH05130010A (en) | Portable telephone set and external device | |
| JP3654183B2 (en) | Intercom system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200417 |
|
| RJ01 | Rejection of invention patent application after publication |