CN211980197U

CN211980197U - Sound pick-up device under vehicle-mounted broadcast listening environment

Info

Publication number: CN211980197U
Application number: CN202020268698.6U
Authority: CN
Inventors: 姚嘉; 高永泽; 任金平; 马琪
Original assignee: Hangzhou Nanosic Technology Co ltd
Current assignee: Hangzhou Nanosic Technology Co ltd
Priority date: 2020-03-07
Filing date: 2020-03-07
Publication date: 2020-11-20
Anticipated expiration: 2030-03-07

Abstract

The application discloses pickup apparatus under broadcast environment is listened to on-vehicle, its characterized in that, this pickup apparatus includes: the voice input module, the microprocessor and the communication module; the voice input module comprises a front microphone used for voice acquisition and a rear microphone used for noise acquisition and compensation, the microprocessor is connected with a power amplification unit of the vehicle-mounted broadcast radio, and broadcast audio signals output by the vehicle-mounted broadcast radio are directly transmitted to the microprocessor and then serve as filtering signals, so that part of noise signals acquired by the voice input module are eliminated. The utility model provides a pick-up device under broadcast environment is listened to on-vehicle, to on-vehicle environment pronunciation operation technical difficulty, through inner structure's improvement, directly acquire broadcast audio signal from the source to regard it as the reference signal of murmur, overall structure is light and handy, with low costs, convenient operation, far field pickup, environmental noise adaptability is strong.

Description

Sound pick-up device under vehicle-mounted broadcast listening environment

Technical Field

The utility model relates to a sound pick-up device under broadcast environment is listened to on-vehicle.

Background

In a vehicle environment, voice operation is a relatively safe operation mode. In the voice operation solution, a far-field pickup technology is mainly utilized, voice information is picked up through a front-end voice processing module, processing such as echo cancellation, noise reduction, reverberation removal, voice enhancement and the like is carried out on a voice signal, and then the voice signal is transmitted to an external device, and the external device carries out recognition response on the voice information.

In the prior art, the technical difficulty is reverberation effect and background noise interference in a vehicle, vehicle-mounted broadcast audio is an important interference source, and how to solve the interference of the vehicle-mounted broadcast audio is a difficult problem of voice operation.

SUMMERY OF THE UTILITY MODEL

Technical difficulty to on-vehicle environment, the utility model aims to provide a through the modified pick-up device under the broadcast environment is listened to on-vehicle.

The utility model relates to a pick-up device under broadcast environment is listened to on-vehicle, include: the voice input module, the microprocessor and the communication module; the voice input module comprises a front microphone used for voice acquisition and a rear microphone used for noise acquisition and compensation, the microprocessor is connected with a power amplification unit of the vehicle-mounted broadcast radio, and broadcast audio signals output by the vehicle-mounted broadcast radio are directly transmitted to the microprocessor and then serve as filtering signals, so that part of noise signals acquired by the voice input module are eliminated.

Further, the microprocessor is connected with the voice input module; the communication module is connected with the microprocessor.

Furthermore, the pickup device also comprises a host interface, and the external equipment is connected to the electronic equipment in the vehicle through the host interface.

Further, the host interface is one or more of: USB-TYPE-C interface, MICRO-USB interface, APPLE LIGHTNING interface.

Furthermore, an independent circuit is arranged between the power amplification unit of the vehicle-mounted broadcast radio and the microprocessor to transmit broadcast audio signals.

Further, the external equipment comprises an intelligent host, an intelligent mobile phone and an intelligent tablet computer.

Further, an independent line is arranged between the host interface and the microprocessor to transmit the broadcast audio signal.

The utility model provides a pick-up device under broadcast environment is listened to on-vehicle, to on-vehicle environment pronunciation operation technical difficulty, through inner structure's improvement, directly acquire broadcast audio signal from the source to regard it as the reference signal of murmur, overall structure is light and handy, with low costs, convenient operation, far field pickup, environmental noise adaptability is strong.

Drawings

Specific embodiments of the present application will be described below with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram illustrating a sound pickup apparatus in an in-vehicle broadcast listening environment according to an embodiment of the present application;

fig. 2 is a schematic structural diagram illustrating another sound pickup apparatus in an in-vehicle broadcast listening environment according to an embodiment of the present application;

FIG. 3 is a diagram illustrating a microprocessor architecture according to an embodiment of the present application;

fig. 4 shows a far-field sound pickup working flow chart of playing music of a sound pickup apparatus in an in-vehicle listening and broadcasting environment according to an embodiment of the present application.

Detailed Description

The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. The present invention may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

For ease of description, spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The utility model relates to a sound pickup apparatus under broadcast environment is listened to on-vehicle, the structure is as shown in figure 1, and the device includes: the voice input device comprises a voice input module 2, a microprocessor 1, a host interface 3 and a power supply module 4.

The host interface 3 is connected to the power supply module 4 and, in turn, to the microprocessor 1.

The power supply module 4 is connected with the microprocessor 1 and the voice input module 2.

The microprocessor 1 is connected with the voice input module 2.

Wherein, the concrete structure is as follows:

1. voice input module

And the voice input module 2 is used for picking up sound in a far field and acquiring a remote sound signal.

The voice input module 2 comprises at least 1 microphone. If the voice input module 2 adopts a single microphone or double microphones, the voice input module is used for far-field sound pickup and acquiring a remote sound signal.

The microphone is a high-sensitivity microphone, and in particular, when the microphone is implemented, the voice input module 2 may be one high-sensitivity microphone, the voice input module 2 may also be an array formed by two high-sensitivity microphones, and the voice input module 2 may also be an array formed by a plurality of high-sensitivity microphones.

In the embodiment, 2 microphones which are arranged in front and back are arranged for voice acquisition; the front microphone is a main microphone and is mainly responsible for voice acquisition and microphone noise detection; the rear microphone is an auxiliary microphone and is mainly responsible for microphone ejection noise compensation and background noise acquisition.

Through the noise reduction processing of the double microphones, the two microphones are adopted to collect and process the voice signals, enhance the voice signals, and inhibit stationary noise (such as white noise, wind noise, environmental noise during the operation of an automobile and the like) and non-stationary noise (such as noise in an unexpected direction, such as voice, music, television background sound and the like).

2. Microprocessor

And the microprocessor 1 is used for processing the sound signals acquired by the voice input module 2. For example, the sound signal acquired by the voice input module 2 is subjected to noise reduction, dereverberation, echo cancellation, voice enhancement, keyword recognition, and the like.

The microprocessor 1 integrates an Audio codec IP core, a power management module and a stereo Audio codec IP.

The microprocessor 1 adopts a special Audio processing chip which is a special human-computer interaction/Audio processing chip, the chip integrates a high-performance low-power consumption Audio Codec IP core and a power management module, and the Codec IP is a low-power consumption, flexible and highly integrated stereo Audio Codec IP. The IP supports stereo ADC and microphone input, and stereo DAC and earphone play. And a high-performance processing kernel is integrated, so that local speech recognition based on a neural network can be performed. The integrated internal memory may store a speech recognition library.

When the microprocessor 1 in this embodiment is implemented, the architecture thereof may be as shown in fig. 3. In fig. 3, M is abbreviated Master, S is abbreviated Slave, codec is Audio codec IP core, and PMU is a power management module.

3. Host interface

And a host interface 3 for transmitting the sound signal processed by the microprocessor 1 to an external device 6 connected to the apparatus. The host interface 3 is one or more of the following: USB-TYPE-C interface, MICRO-USB interface, APPLE LIGHTNING interface.

In addition, other interfaces may be used, and the embodiment does not limit the specific interface.

The host interface 3 can be used for transmitting audio data and charging the equipment, a USB bus in the host interface 3 is connected with the external equipment 6 (such as an intelligent host, a smart phone, an intelligent tablet computer, an intelligent driving multimedia terminal and the like) during audio transmission, the processed audio data is transmitted to the external equipment 6, the external equipment 6 performs voice recognition on a sound signal preprocessed by the microprocessor 1, semantic understanding is performed, the sound signal of a user is responded, and man-machine interaction is realized with the user.

4. Power supply module

And a power module 4 for supplying power to the device and supplying power to an external device 6 connected to the device through the host interface 3.

For example, the power module 4 is used to supply power to the far-field sound pickup apparatus and also to charge the external device 6.

The power supply of the power supply module 4 can take power from a vehicle-mounted cigarette lighter or a vehicle-mounted USB interface.

The power module 4 includes a power management chip, a work indicator lamp, and a switch.

Power module 4 can be for microprocessor 1, the power supply of voice input module 2, power module 4 can be for intelligent equipment terminal charges, and the user can with the device of integrated far field pickup charges for the equipment terminal that oneself carried as a charging wire to provide the pronunciation interactive operation with external equipment 6 when charging, take place danger when avoiding direct operation.

In actual use, the vehicle-mounted radio 7 is generally turned on to play entertainment contents such as music and language programs during driving. In the in-vehicle voice recognition, an important noise signal is a broadcast audio signal output by the vehicle-mounted broadcast radio 7, and how to process the broadcast audio signal output by the vehicle-mounted broadcast radio 7 is an important problem.

The utility model discloses in, set up independent first circuit 8 between power amplifier unit 9 of on-vehicle broadcast radio 7 and the microprocessor 1 and transmit broadcast audio signal, adopt microprocessor 1 through the structural style who directly is connected with on-vehicle broadcast radio 7, microprocessor 1 gathers on-vehicle broadcast radio 7's broadcast audio signal alone, signal acquisition is simple, and do not receive the interference of other signals, the signal of gathering is pure, the broadcast audio signal direct transmission of on-vehicle broadcast radio 7 output is as filtering signal behind microprocessor 1, eliminate the part noise signal that voice input module 2 gathered with this. The power amplifier unit 9 may be a power amplifier circuit module in a radio.

The microprocessor 1 separately acquires audio data of the broadcast audio signal of the on-vehicle broadcast radio 7 and processes it as a noise signal. Thereby further facilitating subsequent noise elimination processing, voice recognition and other work.

Taking the example of the smart host playing music, as shown in fig. 4, when the user is playing music,

1) the vehicle-mounted radio 7 plays entertainment contents such as music, language programs and the like, audio signals are directly input into the microprocessor 1, and the microprocessor 1 extracts the audio signals as reference signals of noise; meanwhile, an independent second line 5 can be arranged between the host interface 3 and the microprocessor 1 to transmit other audio signals, and through double-signal acquisition, pickup is more accurate, and applicable scenes are wider.

2) The microprocessor 1 uses the reference signal to perform technical processing such as echo cancellation on the picked sound signal;

3) the user sends a voice command, and when the preset awakening word is identified, the microprocessor 1 identifies the voice signal subjected to noise reduction, so that voice interaction with the voice signal is realized.

Claims

1. A sound pickup apparatus in an environment where a vehicle is listening to a broadcast, the sound pickup apparatus comprising: the voice input module, the microprocessor and the communication module; the voice input module comprises a front microphone used for voice acquisition and a rear microphone used for noise acquisition and compensation, the microprocessor is connected with a power amplification unit of the vehicle-mounted broadcast radio, and broadcast audio signals output by the vehicle-mounted broadcast radio are directly transmitted to the microprocessor and then serve as filtering signals, so that part of noise signals acquired by the voice input module are eliminated.

2. The sound pickup apparatus in car listening broadcasting environment as claimed in claim 1, wherein said microprocessor is connected to said voice input module; the communication module is connected with the microprocessor.

3. The sound pickup apparatus in an on-vehicle listening broadcasting environment as claimed in claim 1, wherein the sound pickup apparatus further comprises a host interface through which an external device accesses an electronic device in the vehicle.

4. The sound pickup apparatus in an on-vehicle listening and broadcasting environment according to claim 3, wherein the host interface is one or more of: USB-TYPE-C interface, MICRO-USB interface, APPLELIGHTNING interface.

5. The sound pickup apparatus in car listening to broadcasting environment as claimed in claim 1, wherein an independent line is provided between the power amplifier unit of the car broadcasting radio and the microprocessor to transmit broadcasting audio signals.

6. The sound pickup apparatus in car listening to broadcasting environment as claimed in claim 3, wherein the external device comprises a smart host, a smart phone, and a smart tablet.

7. The sound pickup apparatus in an on-vehicle listening broadcasting environment as claimed in claim 3, wherein a separate line is provided between the host interface and the microprocessor to transmit the broadcasting audio signal.