CN113286182B - Method and system for eliminating echo between TV and sound pickup peripheral - Google Patents
Method and system for eliminating echo between TV and sound pickup peripheral Download PDFInfo
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- CN113286182B CN113286182B CN202110361020.1A CN202110361020A CN113286182B CN 113286182 B CN113286182 B CN 113286182B CN 202110361020 A CN202110361020 A CN 202110361020A CN 113286182 B CN113286182 B CN 113286182B
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- usb
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- sound pickup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/42203—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS] sound input device, e.g. microphone
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal 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
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal 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
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- 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 OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal 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
Abstract
The invention provides a method and a system for eliminating echoes between a TV and a sound pickup peripheral, wherein the method comprises the following steps: s1, when the USB pickup peripheral is inserted into the TV end, the ALSA driving layer of the TV end detects a USB insertion event, and throws the USB insertion event to the application layer of the TV end; s2, the ALSA driving layer instantly copies a signal sent to the power amplifier as a reference signal and sends the reference signal to an Audio ALSA node which is virtualized by the TV end and informs the USB sound pickup peripheral to indicate that the TV end starts sending the reference signal; and S3, the USB sound pickup peripheral reads the reference signal sent by the TV end at regular time through USB interruption, and performs echo cancellation processing by combining the signal collected by the microphone of the USB sound pickup peripheral, so as to achieve the purpose of noise reduction. The far-field sound pickup function of the intelligent voice television system is realized through the USB Audio sound pickup peripheral, and the problem of synchronization between the sound of a TV loudspeaker and the voice instruction sound picked up by a microphone is solved, so that the problem of echo elimination is solved.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a method and a system for eliminating echoes between a TV and a sound pickup peripheral.
Background
The traditional intelligent voice television system in China mostly only supports near-field pickup of a voice remote controller, and the intelligent voice television system supporting the far-field pickup function is of an integrated structure, namely, the pickup function is integrated in the intelligent voice television system, and meanwhile, the echo eliminating function is integrated together, so that the problem of synchronization of TV loudspeaker sound and voice command sound (namely, human voice) picked up by a microphone does not need to be considered. If a far-field sound pickup function is to be implemented on a traditional smart voice television system which is already produced or sold, a chip with a sound pickup function and a sound attenuation function needs to be integrated in a television, so that the difficulty in modification is caused.
Therefore, if a USB Audio pickup peripheral can be specially realized, the pickup function and the echo cancellation function are both in a pickup peripheral chip and are connected to a traditional intelligent voice television through a USB data line, the far-field pickup function is completed, and the improvement can be conveniently realized. However, as the sound pickup and echo cancellation functions are both in the sound pickup peripheral chip, the sound of the TV speaker needs to be collected and then transmitted to the sound pickup peripheral through the USB as a reference signal of the echo cancellation algorithm. This is related to the problem of synchronization between the two systems.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method and a system for eliminating echo between a TV and a sound pickup peripheral, which realize the far-field sound pickup function of an intelligent voice television system through a USB Audio sound pickup peripheral and simultaneously solve the problem of synchronization between the sound of a TV loudspeaker and the sound of a voice command picked up by a microphone, thereby solving the problem of eliminating the echo.
In a first aspect, the present invention provides a method for eliminating echo between a TV and a sound pickup peripheral, comprising the steps of:
s1, when the USB pickup peripheral is inserted into the TV end, the ALSA driving layer of the TV end detects a USB insertion event, and the USB insertion event is thrown to the application layer of the TV end;
s2, the ALSA driving layer instantly copies a signal sent to the power amplifier as a reference signal and sends the reference signal to an Audio ALSA node which is virtualized by the TV end and informs the USB sound pickup peripheral to indicate that the TV end starts sending the reference signal;
and S3, the USB sound pickup peripheral reads the reference signal sent by the TV end at regular time through USB interruption, and performs echo cancellation processing by combining the signal collected by the microphone of the USB sound pickup peripheral, so as to achieve the purpose of noise reduction.
In a second aspect, the present invention provides a system for eliminating echo between a TV and a sound pickup peripheral, comprising:
the TV end throws the USB inserting event to the application layer of the TV end when the ALSA driving layer detects the USB inserting event that the USB pickup peripheral is inserted into the TV end; the ALSA driving layer instantly copies a signal sent to the power amplifier as a reference signal to an Audio ALSA node which is virtualized by a TV end and informs the USB sound pickup peripheral to indicate that the TV end starts to send the reference signal;
and the USB pickup peripheral reads the reference signal sent by the TV end at regular time through USB interruption and performs echo cancellation processing by combining the signal collected by the microphone of the USB pickup peripheral so as to achieve the purpose of noise reduction.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: the sound pickup peripheral is specially used for realizing a USB Audio sound pickup peripheral, the sound pickup function and the echo cancellation function are both arranged in a sound pickup peripheral chip, the problem of synchronization between the sound of a TV loudspeaker and the voice instruction sound picked up by a microphone is solved, the sound of the TV loudspeaker is collected and then transmitted to the sound pickup peripheral through a USB to serve as a reference signal of an echo cancellation algorithm, and therefore the problem of echo cancellation is solved. When the remote-field sound pickup device is used, a USB Audio sound pickup peripheral is connected to a traditional intelligent voice television through a USB data line, so that a far-field sound pickup function can be completed, for a TV end, the TV end only needs to support a USB CDC protocol and a USB Audio Class protocol, and is easy to realize due to software modification.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
FIG. 1 is a schematic block diagram of the system of the present invention;
fig. 2 is a flowchart of a method according to an embodiment of the invention.
Detailed Description
The embodiment of the application provides a method and a system for eliminating echo between a TV and a sound pickup peripheral, realizes the far-field sound pickup function of an intelligent voice television system through the USB Audio sound pickup peripheral, and simultaneously solves the problem of synchronization between the sound of a TV loudspeaker and the sound of a voice instruction picked up by a microphone, thereby solving the problem of echo elimination.
The technical scheme in the embodiment of the application has the following general idea: the pickup function and the echo elimination function are stripped from the TV end, a USB Audio pickup peripheral is specially realized, the pickup function and the echo elimination function are integrated in a pickup peripheral chip, the problem of synchronization between the sound of a TV loudspeaker and the sound of a voice command picked up by a microphone is solved, the sound of the TV loudspeaker is collected and then transmitted to the pickup peripheral through a USB (universal serial bus), and the collected sound is used as a reference signal of an echo elimination algorithm of the USB Audio pickup peripheral, so that the problem of echo elimination is solved. When the remote-field sound pickup device is used, a USB Audio sound pickup peripheral is connected to a traditional intelligent voice television through a USB data line, so that a far-field sound pickup function can be completed, for a TV end, the TV end only needs to support a USB CDC protocol, and is easy to realize due to software improvement.
Before describing the specific embodiment, a system framework corresponding to the method of the embodiment of the present application is described, and as shown in fig. 1, the system is roughly divided into two parts:
the TV end supports a USB CDC (Communication Device Class) and a USB Audio Class protocol; the system comprises an application layer and an ALSA (amplitude versus frequency) driving layer, wherein a TV end needs to copy a signal sent to a power amplifier in the ALSA driving layer in real time and send the copied signal to an Audio ALSA node which is arranged outside a TV end and is virtualized out of the TV end, and the TV end needs to send an instruction to inform the sound pickup peripheral that the TV starts to send a reference signal through a CDC (control data center) protocol on the application layer.
The USB Audio pickup peripheral supports USB CDC (Communication Device Class) and USB Audio Class protocols; the interior of the sound pickup device is integrated with a pickup module and an AEC module, wherein the AEC module is an echo elimination module and is provided with an echo elimination algorithm, and the echo between a TV and the pickup peripheral is eliminated by comparing two paths of sound data.
Example one
As shown in fig. 2, the present embodiment provides a method for eliminating echo between a TV and a sound pickup peripheral, including the following steps:
s1, when the USB pickup peripheral is inserted into the TV end, the ALSA driving layer of the TV end detects a USB insertion event, and the USB insertion event is thrown to the application layer of the TV end;
s2, the ALSA driving layer instantly copies a signal sent to the power amplifier as a reference signal and sends the reference signal to an Audio ALSA node which is virtualized by the TV end and informs the USB sound pickup peripheral to indicate that the TV end starts sending the reference signal;
and S3, the USB sound pickup peripheral reads the reference signal sent by the TV end at regular time through USB interruption, and performs echo cancellation processing by combining the signal collected by the microphone of the USB sound pickup peripheral, so as to achieve the purpose of noise reduction.
The TV end and the USB sound pickup peripheral simultaneously support a USB CDC and a USB Audio Class protocol.
The TV end sends an instruction to inform the USB sound pickup peripheral equipment of indicating that the TV end starts sending reference signals through a CDC protocol at an application layer.
Based on the same inventive concept, the application also provides a device corresponding to the method in the first embodiment, which is detailed in the second embodiment.
Example two
As shown in fig. 1 and 2, in the present embodiment, there is provided a system for eliminating echo between a TV and a sound pickup peripheral, including:
the TV end throws the USB inserting event to the application layer of the TV end when the ALSA driving layer detects the USB inserting event that the USB pickup peripheral is inserted into the TV end; the ALSA driving layer instantly copies a signal sent to the power amplifier as a reference signal to an Audio ALSA node which is virtualized by a TV end and informs the USB sound pickup peripheral to indicate that the TV end starts to send the reference signal;
and the USB sound pickup peripheral reads the reference signal sent by the TV end at regular time through USB interruption and performs echo elimination processing by combining the signal collected by the microphone of the USB sound pickup peripheral so as to achieve the purpose of noise reduction.
The TV end and the USB sound pickup peripheral simultaneously support a USB CDC and a USB Audio Class protocol.
The TV end sends an instruction to inform the USB sound pickup peripheral to indicate that the TV end starts sending reference signals through a CDC protocol at an application layer.
Since the apparatus described in the second embodiment of the present invention is an apparatus used for implementing the method of the first embodiment of the present invention, based on the method described in the first embodiment of the present invention, a person skilled in the art can understand the specific structure and the deformation of the apparatus, and thus the details are not described herein. All the devices adopted in the method of the first embodiment of the present invention belong to the protection scope of the present invention.
The technical scheme provided in the embodiment of the application at least has the following technical effects or advantages: the sound pickup peripheral is specially used for realizing a USB Audio sound pickup peripheral, the sound pickup function and the echo cancellation function are both arranged in a sound pickup peripheral chip, the problem of synchronization between the sound of a TV loudspeaker and the voice instruction sound picked up by a microphone is solved, the sound of the TV loudspeaker is collected and then transmitted to the sound pickup peripheral through a USB to serve as a reference signal of an echo cancellation algorithm, and therefore the problem of echo cancellation is solved. When the remote-field sound pickup device is used, a USB Audio sound pickup peripheral is connected to a traditional intelligent voice television through a USB data line, so that a far-field sound pickup function can be completed, for a TV end, the TV end only needs to support a USB CDC protocol, and is easy to realize due to software improvement.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus or system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (6)
1. A method for eliminating echo between TV and sound pick-up peripheral is characterized in that: the method comprises the following steps:
s1, when the USB pickup peripheral is inserted into the TV end, the ALSA driving layer of the TV end detects a USB insertion event, and the USB insertion event is thrown to the application layer of the TV end;
s2, the ALSA driving layer instantly copies a signal sent to the power amplifier as a reference signal and sends the reference signal to an Audio ALSA node which is virtualized by the TV end and informs the USB sound pickup peripheral to indicate that the TV end starts sending the reference signal;
and S3, the USB sound pickup peripheral reads the reference signal sent by the TV end at regular time through USB interruption, and performs echo cancellation processing by combining the signal collected by the microphone of the USB sound pickup peripheral, so as to achieve the purpose of noise reduction.
2. The method of claim 1, wherein the method further comprises: the TV end and the USB sound pickup peripheral simultaneously support a USB CDC and a USB Audio Class protocol.
3. The method of claim 1, wherein the method further comprises: the TV end sends an instruction to inform the USB sound pickup peripheral to indicate that the TV end starts sending reference signals through a CDC protocol at an application layer.
4. A system for eliminating echo between TV and sound pick-up peripheral equipment is characterized in that: the method comprises the following steps:
the TV end throws the USB inserting event to the application layer of the TV end when the ALSA driving layer detects the USB inserting event that the USB pickup peripheral is inserted into the TV end; the ALSA driving layer instantly copies a signal sent to the power amplifier as a reference signal to an Audio ALSA node which is virtualized by a TV end and informs the USB sound pickup peripheral to indicate that the TV end starts to send the reference signal;
and the USB sound pickup peripheral reads the reference signal sent by the TV end at regular time through USB interruption and performs echo elimination processing by combining the signal collected by the microphone of the USB sound pickup peripheral so as to achieve the purpose of noise reduction.
5. The system of claim 4, wherein the echo cancellation system further comprises: the TV end and the USB sound pickup peripheral simultaneously support a USB CDC and a USB Audio Class protocol.
6. The system of claim 4, wherein the echo cancellation system further comprises: the TV end sends an instruction to inform the USB sound pickup peripheral to indicate that the TV end starts sending reference signals through a CDC protocol at an application layer.
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| CN202110361020.1A CN113286182B (en) | 2021-04-02 | 2021-04-02 | Method and system for eliminating echo between TV and sound pickup peripheral |
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| CN202110361020.1A CN113286182B (en) | 2021-04-02 | 2021-04-02 | Method and system for eliminating echo between TV and sound pickup peripheral |
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| CN114143909A (en) * | 2021-12-06 | 2022-03-04 | 阿里巴巴达摩院(杭州)科技有限公司 | Data transmission method, pluggable switching equipment and computer storage medium |
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| US9148611B2 (en) * | 2012-10-18 | 2015-09-29 | Mettalk.Com, Inc. | Method and apparatus for coviewing video |
| CN108260051B (en) * | 2018-01-15 | 2020-10-13 | 珠海市黑鲸软件有限公司 | Voice remote control system, portable transmission equipment and intelligent equipment |
| CN108255749A (en) * | 2018-01-18 | 2018-07-06 | 郑州云海信息技术有限公司 | System and method is realized in a kind of UVC Camera drivings based on V4L2 frames |
| JP6948609B2 (en) * | 2018-03-30 | 2021-10-13 | パナソニックＩｐマネジメント株式会社 | Noise reduction device |
| CN108717398B (en) * | 2018-04-10 | 2021-05-25 | 中国舰船研究设计中心 | Pulse signal synchronization system and method suitable for USB interface |
| CN208422407U (en) * | 2018-06-07 | 2019-01-22 | 深圳巴金科技有限公司 | It is a kind of for far saying the echo eliminating device of speech recognition |
| CN109257682B (en) * | 2018-09-29 | 2020-04-24 | 歌尔科技有限公司 | Sound pickup adjusting method, control terminal and computer readable storage medium |
| CN208691406U (en) * | 2018-10-15 | 2019-04-02 | 四川长虹电器股份有限公司 | Far field speech collecting system for smart television |
| CN110277102B (en) * | 2019-04-30 | 2021-09-07 | 晶晨半导体(上海)股份有限公司 | Echo cancellation system and echo cancellation method for multi-channel sound mixing |
| CN110956974A (en) * | 2019-12-05 | 2020-04-03 | 浙江大华技术股份有限公司 | Echo cancellation method and related device |
| CN111506291B (en) * | 2020-03-05 | 2024-01-09 | 北京声智科技有限公司 | Audio data acquisition method, device, computer equipment and storage medium |
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