CN114435242A - Automobile digital audio output method and device and warning device - Google Patents
Automobile digital audio output method and device and warning device Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q5/00—Arrangement or adaptation of acoustic signal devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
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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
Abstract
The technical scheme of the invention discloses a digital audio output method, a device and a warning device for an automobile, wherein the output audio inside and outside the automobile is subjected to sound effect processing by a master controller, the master controller is connected with an audio bus and outputs the processed audio to an audio amplifying device inside or outside the automobile through an interface on the audio bus, and can realize the in-automobile sound effects such as multimedia, alarm, map navigation, call receiving and calling, and in-automobile engine work simulation sounds and the out-automobile sound effects such as multimedia, alarm, welcome, outside street explosion, and outside pedestrian warning sounds The function of appropriate warning is used to more effectively reduce the occurrence of traffic accidents.
Description
Technical Field
The invention belongs to the field of intelligent sound boxes of vehicles, and particularly relates to a digital audio output method and device for an automobile and a warning device.
Background
Along with the more perfect legislation of China on the aspect of vehicle driving safety, more requirements are provided for the safety warning sound effect of the automobile, and along with the improvement of living standard of people, more personalized and diversified requirements are provided for the sound effect experience of taking the automobile, therefore, various automobile manufacturers also provide various sound effect solutions, especially in the aspect of solving the application of the sound production scene outside the automobile, but at present, engine noise is obtained through technical means, the original engine noise is processed and simulated again through a mode of presetting one or more specific algorithm modes in a controller related to sound output, and then the engine noise is directly output to a loudspeaker or a sound box device outside the automobile. Because the sound effect is processed or synthesized mainly by specific algorithms, the method has very limited variety of sound effect output outside the vehicle and can not meet the requirements of people on individuation and diversification of sound effects.
In addition, the number of the existing controllers of the high-end vehicle model CAN be more than 100, however, the controllers are not isolated islands, the controllers communicate with each other through CAN \ LIN \ Ethernet and the like, the more controllers and the more auxiliary hardware are needed, the more and complicated aspects needing communication and coordination are needed, and the instability of operation is increased.
Disclosure of Invention
In order to overcome the defects in the prior art, the technical scheme of the invention provides a digital audio output method for an automobile, wherein the output audio inside and outside the automobile is subjected to sound effect processing by a master controller, and the master controller is connected with an audio bus and outputs the processed audio to an audio amplifying device inside and/or outside the automobile through an interface on the audio bus.
Furthermore, the automobile digital audio output method can also output audio to an audio amplification device outside the automobile through a Bluetooth, a USB and an audio input interface.
Further, the sound effect processed by the master controller comprises multimedia, map navigation, call receiving and calling, in-vehicle engine work simulation, alarming, welcoming, outside street blasting and outside pedestrian warning.
Furthermore, a sound effect program processing module is arranged in the master controller for carrying out special sound effect processing.
And further, the audio bus comprises a master node and slave nodes, wherein the master node is connected with a master controller, and when the master controller identifies that the slave nodes are connected with an in-vehicle audio amplification device or an out-vehicle audio amplification device, the master controller outputs processed audio signals to the corresponding slave nodes through the audio bus.
Further, the slave nodes comprise a slave node 1 and a slave node 2, wherein the slave node 1 is connected with an in-vehicle audio amplification device, and the slave node 2 is connected with an out-vehicle audio amplification device.
Furthermore, the in-vehicle audio amplifying device is used for outputting multimedia, alarming, map navigation, call receiving and making, and the sound of the in-vehicle engine work simulation; the external audio amplifier is used for outputting multimedia, alarming, welcoming, external street and external pedestrian warning sounds.
The invention also discloses a digital audio output device of the automobile, which executes the digital audio output method of the automobile, wherein the master controller comprises user input equipment, a sound effect program processing module and an audio arbitration processing module, and the audio bus is also provided with a preset number of reserved interfaces for connecting an audio amplifying device in the automobile or an audio amplifying device outside the automobile.
The invention discloses a warning device for automobile digital audio output, which comprises a forward-looking camera and a sound wave detection device, wherein when the automobile runs at a speed higher than a set speed per hour, and the forward-looking camera detects that a pedestrian is in a set range, a master controller outputs a warning sound effect higher than a set decibel of environmental noise to an in-automobile audio amplification device and an out-automobile audio amplification device according to the environmental noise detected by the sound wave detection device in real time until the pedestrian leaves the set range of the master controller.
Further, the device comprises an automobile danger alarm flash lamp, and the main controller starts the automobile danger alarm flash lamp until the pedestrian leaves a set range of the main controller.
The technical scheme of the invention provides a digital audio output method and a digital audio output device for an automobile, which aims to control the length of a bus, reduce the number of controllers and further reduce the weight and the hardware cost, centralizes algorithm programs and control programs of sound effects required by all automobiles in one controller, utilizes one audio bus to connect audio amplification devices inside and outside the automobile, and finally connects all sound production equipment, such as a sound box, a loudspeaker and the like, so that specific sound effects are output based on a uniform audio processing platform; meanwhile, the audio processing platform can directly collect engine noise or an accelerator pedal signal to simulate engine or street sound effect, and can also select a sound effect file through an APP of a user matched with the audio processing platform or manually and directly copy the sound effect file to the audio processing platform, so that the sound effect file can be selected in a diversified manner to meet multiple requirements of the user. The same is true for other special sound effects, such as sound effects required by the welcome; in addition, as more slave nodes are reserved on the audio bus, a user can flexibly prepare various required sound effect output equipment on one hand, and can implement a scheme of installing the slave nodes after the slave nodes are installed according to the requirement on the other hand, so that the cost of initial purchase is reduced. The above is the main problem to be solved by the method and the device for outputting digital audio of the automobile.
The invention also provides a warning device for automobile digital audio output, which can generate continuous warning sound for pedestrians or drivers when the relative distance between the pedestrians and the automobile is within the safe distance to be kept, so as to remind the pedestrians or the drivers to ensure the relative safe distance, thereby improving the safe driving performance of the automobile.
The method, the device and the warning device for outputting the digital audio of the automobile disclosed by the technical scheme of the invention have the advantages of reasonable design, low production cost, high reliability and strong practicability, can utilize the existing automobile control system to modify programs and circuits and then add the function, can also be designed and installed on a brand-new automobile, are easy to popularize and apply, and are beneficial to creating safer driving and riding environments and meeting the requirements of drivers and passengers on more individuation and diversification of automobile sound effects.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic diagram of a general controller;
fig. 2 is a flowchart illustrating a digital audio output method for a vehicle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations as a sequential process, many of the operations can be performed in parallel, concurrently, or simultaneously. In addition, the order of the operations may be re-arranged. A process may be terminated when its operations are completed, but may have additional steps not included in the figure. A process may correspond to a method, a function, a procedure, a subroutine, a subprogram, etc.
Specific structural and functional details disclosed herein are merely representative and are provided for purposes of describing example embodiments of the present invention. The present invention may, however, be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The invention provides a method, a device or a warning device for outputting digital audio of an automobile, as shown in fig. 1-2, the hardware components required for realizing the method mainly comprise a master controller, an audio bus, an in-automobile audio amplifying device, an out-automobile audio amplifying device, an audio bus reserved interface, a forward-looking camera and a sound wave detecting device, wherein the master controller mainly comprises user input equipment and a sound effect program processing module, in-automobile sound effect program modules such as multimedia, alarm, map navigation, call-in and call-out, sound of in-automobile engine work simulation and the like, out-automobile sound effect program modules such as multimedia, alarm, welcome, out-automobile burst street, sound of out-automobile pedestrian warning and the like, and the master controller also comprises an audio arbitration processing module and a slave node content sending module.
As shown in fig. 1-2, the master controller mainly comprises four modules, namely a user input device, a sound effect program processing module, an audio arbitration processing module and a slave node content sending module, the master controller has an audio link diagnosis function, can identify and judge the access condition of the slave node in real time, outputs the processed audio signal to the corresponding slave node through an audio bus by the slave node content sending module, receives the audio signal from the slave node, and sends out the corresponding sound effect through an in-vehicle audio amplifying device or an out-vehicle audio amplifying device connected with the slave node. In order to save hardware cost, reduce the total weight of the automobile and enhance the cooperativity and stability of various audio processing, a concept similar to a large domain controller is used, and a general controller is arranged to replace audio controllers distributed nearby each automobile audio playing device, so that the method has a very advanced significance. Audio algorithm processing programs related to the audio are all burned in the master controller, and the master controller can output the audio to the corresponding audio amplification device through the audio bus through information collection and operation, and finally play the audio. Wherein user input equipment includes total controller from the touch-sensitive screen of taking and the supporting cell-phone APP with total controller, namely user's both accessible total controller's touch-sensitive screen sets up audio playback setting parameter, also can carry out the audio frequency through the cell-phone APP for the setting of cooperation total controller and special development and set up audio playback setting parameter, certainly to the external interface of the source file accessible total controller of broadcast, like USB etc., load the audio file that will need the broadcast in total controller, with the needs of preparing the broadcast. The sound effect program processing module is a special program module for processing audio, different sound effect files can be produced according to different requirements of a user after individuation, scene and specialization processing are carried out on related sound effects by the module in combination with related setting parameters of the user, and the sound effect files are stored in a memory of a master controller, wherein the sound effect program processing module further comprises a sub-module for processing vehicle-mounted multimedia, a sub-module for processing alarm, a sub-module for map navigation, a sub-module for receiving and calling a telephone call, a sub-module for simulating the working of an in-vehicle engine, and other in-vehicle sound effect program modules, and further comprises an out-vehicle sound effect program module such as a sub-module for multimedia, a sub-module for alarm, a sub-module for welcoming a guest, a sub-module for outside a vehicle to explode a street, a sub-module for outside a vehicle to warn pedestrians, and other outside vehicle sound effect program modules. The audio arbitration processing module of the master controller is mainly responsible for controlling parameters such as the output time, the output channel, the output sound effect, the output duration, the output frequency, how to output audio frequency, and the like, for example, when a pedestrian suddenly walks to the front of the automobile in the normal running process of the automobile, the front camera of the automobile judges whether the distance between the pedestrian and the automobile is within the range set by the master controller, and can send out alarm sounds with different sound effects and sound volumes through the inside and/or the outside of the automobile, specifically, when the pedestrian is within the range set by the master controller, the shorter sound effect is selected when the pedestrian is closer to the automobile, the sound volume can be larger, the sound effect with slightly slower rhythm can be selected when the pedestrian is farther from the automobile, the sound volume can be smaller, and the double-flash of the automobile can be started in a matching way to warn the pedestrian from two senses of hearing and vision until the pedestrian leaves the set automobile range, and for the automobile driver, the pedestrian warning is obtained through the sound effect playing in the automobile, and the pedestrian is avoided in time. The audio arbitration processing module is a special processing module which is determined by the master controller under which condition and which sound effect is output, and can make effective decision after operation of a built-in algorithm according to conditions such as external environment, user setting and the like, so that appropriate response is made. The slave node content sending module is specially responsible for sending the content of the digital audio to equipment specifically connected to the slave node by an output strategy determined by the master controller, and mainly plays a role in information distribution, so that the timeliness and the accuracy of information sending are guaranteed.
As shown in fig. 2, the audio bus of the present invention is specifically referred to as A2B car audio bus. With the development of intelligent networking of automobiles, the development requirement on audio is higher and higher, and more advanced and functional infotainment functions need to be added to meet the user experience of consumers. However, it is difficult to balance the increase in functions and the reduction in weight of the entire vehicle (the weight and cost of the cable) in the conventional analog parallel audio signal transmission system. ADI (Analog Devices Inc.) has promoted an A2B (automatic Audio Bus) vehicle Audio Bus through optimization of the Audio Bus, and can provide excellent Audio quality compared with the traditional Analog Audio Bus, and meanwhile, the weight and the cost of an automobile Audio wire harness can be greatly saved. The A2B bus is used to connect audio devices in the vehicle, such as MIC, power Amplifier (AMP), multimedia host (Head Unit), and T-BOX. The transmission of audio data (I2S/TDM), control signals (I2C), clock and power over distance is performed over a low cost unshielded twisted pair UTP. The digital interface can save peripheral DAC/ADC conversion, provides a simpler and more convenient solution for audio design, and simultaneously improves the fuel efficiency.
The A2B bus is a vehicle-mounted high-bandwidth (50Mbps), bidirectional and digital audio bus, adopts a daisy chain structure, is a single-Master (Master) and multi-Slave (Slave) system, and maximally supports 11 nodes, namely 1 Master node and 10 Slave nodes, wherein the distance between the nodes is 15 meters at most, and the maximum length of the whole daisy chain is 40 meters. A2B supports the transmission of long-distance digital audio, at most 32 data channels (uplink and downlink), a conventional code rate of 48kHz-44.1kHz (supporting high-fidelity audio of 96kHz and 192 kHz), and a bus embedded with a clock and a power supply. The time delay of the link is less than 50uS, so that the possibility is provided for applications such as ANC active noise reduction, real-time voice recognition, high-fidelity sound effect processing and the like. A2B can be used for connection of vehicle-mounted audio ECU, microphone array, power amplifier, loudspeaker, Tuner, active noise reduction and the like. A vehicle-mounted A2B link, a Head Unit of a general sound Box host serves as a Master, the rear end of the Head Unit is sequentially provided with a T-Box, an MIC, a loudspeaker, a Tuner, an AMP power amplifier, an Active subwoofer and the like, and if nodes need to be added, the nodes can be directly connected in the link in series. Mater provides clock and synchronization signals, which must be the first node of the link. A2B is a one-Master-multiple-slave link, which only has one Master and is configured in advance in the architectural design stage, and is generally a Head Unit host. If the host cannot work, the T-Box exists on the vehicle, and in order to ensure safety, the T-Box can be switched from slave to master to send data downwards so as to ensure normal work of a subsequent network. If a certain slave in the middle of the link can not work, the downstream link of the node can also not work, the link can be folded back from the node, and the upstream function can be maintained to be normal.
The advantages of the A2B car audio bus are mainly the following. First, weight and cost are reduced. The A2B bus has the advantages that the audio performance is improved, meanwhile, fewer cables are adopted, the cost, the weight and the complexity of the system and the cables are reduced, the oil consumption of the whole vehicle is reduced, and a simpler and more convenient solution is provided for audio design. Second, high bandwidth, low latency. A2B bus theory maximum bandwidth 50Mbps, <50uS link delay, supports the realization of ANC active noise reduction, multi-tone zone identification and other functions, and supports the realization of HIFI high fidelity sound box. And thirdly, bidirectional multi-channel transmission. The same A2B bus can transmit audio data of 32 bidirectional channels, nodes such as a car machine, a power amplifier, an MIC, a T-BOX and the like can be connected in series, a pair of UTP lines can replace a plurality of complex wire harnesses, flexibility, low risk, simplicity and easiness in configuration are realized, and basic configuration and diagnosis of remote nodes can be realized. Fourth, pure numbers are extensible. The A2B bus is pure digital transmission, and peripheral DAC/ADC conversion can be saved to digital interface, and the interference killing feature is strong, and audio quality is guaranteed to the at utmost, promotes user's sense of hearing experience. Under the A2B architecture, after the nodes such as a car machine and a MIC are shaped, the access of additional nodes such as an ANC microphone and the like can be expanded when the nodes are not maximized.
As shown in fig. 2, the in-vehicle audio amplifier and the out-vehicle audio amplifier according to the present invention are audio amplifiers for driving speakers or speakers inside and outside the vehicle, and the purpose of audio amplification is to reproduce audio input signals with high efficiency and low distortion on a sound output element at a desired volume and power level.
As shown in fig. 2, the reserved interfaces of the audio bus are to fully utilize the advantage of multiple channels of the A2B vehicle-mounted audio bus, and reserve more interfaces on the audio bus to output more audio information from the in-vehicle audio amplification device and/or the out-vehicle audio amplification device on the node for A2B, so that a user can flexibly configure the audio amplifier in combination with a practical application process to meet the increasing demand of the user on individuation and diversification of sound effects, thereby making the whole digital audio output scheme of the vehicle more fit the practical application scene.
As shown in fig. 1, the in-vehicle audio amplifier and/or the out-vehicle audio amplifier according to the present invention are the main output devices of the digital audio output method, device or warning device of the vehicle, and mainly include a sound box or a speaker.
The front-view camera is a part which is arranged at the front part of the automobile and is used for detecting the relative position data of the pedestrian and the automobile in real time, after the front-view camera detects the position data of the pedestrian in the visual field, the position data is transmitted to the master controller, the master controller judges whether the position keeps a set safety distance with the automobile, and if the position is not the safety distance, the master controller sends out related warning signals to the pedestrian and a driver, so that the driving direction and the speed of the automobile can be adjusted in time, and the automobile can be better ensured to run safely.
The sound wave detection device is arranged outside the automobile and used for detecting the decibel value of the noise of the environment where the automobile is located in real time, so that the master controller can output warning sound with large volume to the audio amplification device inside the automobile and/or the audio amplification device outside the automobile above the decibel value of the environmental noise, pedestrians and drivers can be ensured to hear the warning sound in time, proper reaction can be made, and safety accidents are avoided.
The functions of the above components can be flexibly configured by related hardware and software according to specific application occasions to better meet actual requirements, and the contents of the technical scheme of the present invention are further explained by combining specific embodiments below.
Example 1:
a general controller (mainly an audio processing chip) firstly analyzes and judges the environmental condition of the automobile, real-time external instructions (sent by a user through a human-computer interface) and the like, then performs audio processing on audio to be output, controls digital audio through a path, outputs the audio to an audio amplifying device inside and/or outside the automobile through a special slave node on an A2B automobile audio bus, amplifies a processed initial audio signal through the audio amplifying device, and outputs the audio signal to a sound box and a loudspeaker in the automobile or outside the automobile, thereby finally completely realizing processing, transmission and playing of the audio.
Example 2:
on the basis of embodiment 1, in addition to audio transmission and control through an A2B car audio Bus, digital audio can be output to an audio amplifier outside the car through transmission methods such as bluetooth wireless transmission, USB (Universal Serial Bus), audio input interface, etc., and after an initial digital audio signal processed by the audio amplifier is amplified, the audio signal is output to a sound box and a speaker outside the car, and finally, processing, transmission and playing of sound effects outside the car are completely realized.
Example 3:
on the basis of the embodiment 1, the processing sound effect of the related audio algorithm in the program loaded by the master controller comprises multimedia, map navigation, call receiving and calling, in-vehicle engine work simulation, alarming, welcoming, outside-vehicle street blasting and outside-vehicle pedestrian warning.
Example 4:
on the basis of embodiment 1, the general controller is as shown in fig. 1, wherein the sound effect program processing module includes in-vehicle sound effect program modules such as a vehicle-mounted multimedia sub-module, an alarm sub-module, a map navigation sub-module, a call/call sub-module, an in-vehicle engine work simulation sub-module, and the like, and an out-vehicle sound effect program module such as a multimedia sub-module, an alarm sub-module, a guest greeting sub-module, an out-vehicle street explosion sub-module, an out-vehicle pedestrian warning sub-module, and the like.
Specifically, the vehicle-mounted multimedia sub-module refers to a multimedia system configured for an automobile, and comprises a special processing module for video recording and playing, music playing, radio, network television sound effects and the like.
The alarm sub-module is a special processing module for finding alarm sound inside or outside the vehicle when a dangerous condition such as a collision between a pedestrian and the vehicle occurs.
The map navigation sub-module is a map navigation system configured in the automobile or a map navigation system externally connected with a mobile phone of a user, and relevant prompt sounds are required to be sent when the map navigation sub-module is used, so that a driver can control the advancing direction of the automobile timely and correctly.
The call receiving and making submodule is mainly used for connecting a mobile phone to an audio master controller of an automobile through a certain transmission means for convenient operation when a driver needs to make a call in the automobile advancing process, and outputting the sound to a playing device through the master controller after processing so as to play the sound in the automobile.
The in-vehicle engine work simulation submodule means that when an automobile engine works, in order to achieve certain special sound effect experience, noise generated by the engine during working is simulated and amplified, and then the noise is output to the playing equipment to play the sound in a vehicle.
The welcome sub-module is called welcome sub-module which is used for showing the respect to the guest in some special occasions, playing a special sound effect to show the significance of welcoming or sending other things when the guest gets in front of the car or passes through the car body, and specially processing the sound effect affair.
The bus outside air-raid street submodule is a bus outside air-raid street submodule which is called by processing a distinctive music or a sound acquired by a car engine in real time by an audio master controller, greatly amplifying the sound by a sound effect amplifying device, outputting an explosive sound effect to a playing device to attract the attention of street pedestrians so as to achieve the effect of attracting eyes of users and meet the novel experience of the users, and specially processing the sound effect affairs.
The pedestrian warning submodule outside the automobile is a pedestrian warning submodule outside the automobile, which is called after the pedestrian outside the automobile crosses the road or enters the dangerous range of automobile running to avoid the traffic accident of collision between the automobile and the pedestrian, and carries out timely sound warning on the automobile driver and the pedestrian so as to arouse the attention of the driver and the pedestrian, thereby avoiding the accident to the maximum extent and specially processing the sound effect affair.
The program is divided into the special sub-modules, so that the calling efficiency and stability of the program are facilitated, the playing effect of the whole automobile sound is improved, and the experience comfort level and the satisfaction degree of a user are increased.
Example 5:
on the basis of embodiment 1, as shown in fig. 1-2, the A2B audio bus includes a master node and a slave node, where the master node is connected to a master controller, the slave node is connected to an in-vehicle audio amplifier or an out-vehicle audio amplifier, and the master controller connected to the master node can identify the relevant audio devices connected to the slave node, and can output the processed audio signals to the audio amplifiers on the slave nodes through the audio bus, and then amplify the processed initial audio signals through the audio amplifiers, and then output the audio signals to the sound boxes and speakers in the vehicle or outside the vehicle, so as to finally realize processing, transmission, and playing of sound effects. The audio amplification device in the car is connected respectively with the audio amplification device outside the car and can improve the effective control to sound on the different node from, also avoids mutual interference, causes the audio quality of output to receive the influence to improve the broadcast effect of whole car sound, increase user's experience comfort level and satisfaction.
The slave nodes further comprise a slave node 1 and a slave node 2, and even more slave nodes can be provided according to the needs of users, wherein the slave node 1 is connected with an automobile internal audio amplifying device, and the slave node 2 is connected with an automobile external audio amplifying device. After the processed initial audio signal is amplified by the audio amplifying device, on one hand, the audio signal can be output to a sound box and a loudspeaker in the automobile, and finally, the processing, transmission and playing of the sound effect outside the automobile are realized; on the other hand, the audio signal can be output to a sound box and a loudspeaker outside the automobile, and finally processing, transmission and playing of sound effects outside the automobile are achieved.
Specifically, the audio amplification device in the automobile is used for outputting the sound of multimedia, alarm, map navigation, call receiving and making, and work simulation of an in-automobile engine; the automobile external audio amplification device is used for outputting multimedia, alarming, welcoming, automobile outside street-blasting and automobile outside pedestrian warning sounds. According to the difference between the inside and outside scenes of the automobile, the output sound effects are distinguished, the stability of program and hardware processing can be enhanced, and the final experience of a user is improved. In addition, the automobile external audio amplifying device can select to install a version with low configuration cost and a version with high configuration cost according to needs, relatively speaking, the cost of the low configuration version is low, the sound effect is poorer, the cost of the high configuration version is higher, the sound effect is better, and a user can select different standard versions according to the requirement of the user on the sound effect to provide different configuration schemes for the user, so that the preference of different users is met. Generally, the pre-installed version of the automobile is a low-configuration and low-cost version, and when a user makes a special request, a higher-configuration version can be installed.
Example 6:
the embodiment provides a device for outputting digital audio of an automobile, which executes the method for outputting digital audio of an automobile, and the A2B audio bus is further provided with a certain number of reserved interfaces, as shown in fig. 2, for connecting an audio amplifying device inside the automobile or an audio amplifying device outside the automobile. The reserved interface corresponds to a slave node on an automobile audio bus, one slave contact corresponds to one reserved interface, and one reserved interface can be connected with one audio playing device. The reserved interfaces can meet the requirements of users on diversified and personalized sound effect modification, and can be replaced after the interfaces in use are damaged, so that the maintenance difficulty is reduced, and the maintenance cost is reduced.
Example 7:
the embodiment provides a warning device for digital audio output of an automobile, which executes the audio output method, and comprises a forward-looking camera and a sound wave detection device, wherein the forward-looking camera is mainly used for detecting the movement track and the relative distance of a pedestrian in the field of view of the camera, when the automobile runs on the road at a speed higher than the preset speed per hour, the forward-looking camera can judge whether the pedestrian exists in the set dangerous range once the pedestrian is detected by the forward-looking camera, if the warning range is exceeded, an audio master controller of the automobile can automatically feed back the detected environmental noise to an audio amplification device inside the automobile and an audio amplification device outside the automobile according to the sound wave detection device in real time, an alarm sound effect higher than the set decibel of the environmental noise is output to the audio amplification device inside the automobile by the main controller through the information, and the processed initial audio signal is amplified by the audio amplification device, and then the audio signal is output to a sound box and a loudspeaker outside the automobile, and finally the processing, transmission and playing of the sound effect outside the automobile are realized. The device can remind driver and pedestrian to notice vigilance to make the driver in time take measures to drive away the car safety, or the pedestrian initiatively leaves the danger scope of settlement, can make driver and pedestrian safer like this, be difficult to the traffic accident who takes place accident, increase user's experience comfort level and satisfaction.
The warning device for the digital audio output of the automobile further comprises an automobile danger warning flash lamp, and the automobile danger warning flash lamp can visually warn pedestrians mainly through continuous flashing, so that the pedestrians can be found out in time and the safety of the pedestrians is protected. The device is characterized in that when the front camera detects that the pedestrian is within the set range of the automobile master controller, the possibility of collision between the advancing automobile and the pedestrian can be determined, and the master controller mainly responsible for audio playing can automatically turn on the automobile danger alarm flash lamp to carry out continuous flicker warning so as to remind the pedestrian to find out in time and leave the master controller to set a dangerous range, so that the occurrence of traffic accidents caused by collision between the pedestrian and the advancing automobile is avoided. The device can ensure the safety warning of the pedestrians not only in the sense of hearing, but also in the sense of vision, and has a very clear double safety warning effect.
The method, the device and the warning device for outputting the digital audio of the automobile provided by the invention are described in detail, specific examples are applied in the text to explain the principle and the implementation mode of the invention, and the description of the above embodiments is only used for helping to understand the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea and method of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A digital audio output method for car features that the audio output from inside to outside of car is processed by a master controller, which is connected to audio bus and outputs the processed audio to audio amplifier and/or audio amplifier via interface on audio bus for respectively controlling the audio from inside or outside of car and realizing the combined control of audio from inside to outside of car.
2. The vehicle digital audio output method according to claim 1, characterized in that the audio can be output to the external audio amplification device through a Bluetooth, USB and audio input interface.
3. The car digital audio output method according to claim 1, wherein the sound effects processed by the general controller include multimedia, map navigation, call receiving and making, in-car engine operation simulation, alarm, welcome, outside air street, outside air pedestrian warning.
4. The digital audio output method of claim 1, wherein the built-in sound effect program processing module in the master controller performs special sound effect processing.
5. The digital audio output method of claim 1, wherein the audio bus comprises a master node and a slave node, wherein the master node is connected to the master controller, and when the master controller recognizes that the slave node is connected to the in-vehicle audio amplification device or the out-vehicle audio amplification device, the master controller outputs the processed audio signal to the corresponding slave node through the audio bus.
6. The car digital audio output method according to claim 5, wherein the slave nodes comprise a slave node 1 and a slave node 2, wherein the slave node 1 is connected with the in-car audio amplifying device, and the slave node 2 is connected with the out-car audio amplifying device.
7. The car digital audio output method according to claim 6, wherein the car audio amplifying device is used for outputting multimedia, alarm, map navigation, telephone call, and car internal engine operation simulation sound; the external audio amplifier is used for outputting multimedia, alarming, welcoming, external street and external pedestrian warning sounds.
8. An automobile digital audio output device for executing the automobile digital audio output method according to any one of claims 1 to 7, wherein the master controller comprises a user input device, a sound effect program processing module and an audio arbitration processing module, and the audio bus is further provided with a preset number of reserved interfaces for connecting the in-automobile audio amplifying device or the out-automobile audio amplifying device.
9. A warning device for automobile digital audio output, which executes the automobile digital audio output method according to any one of claims 1-7, wherein the warning device comprises a forward-looking camera and a sound wave detection device, and is characterized in that when the automobile runs at a speed higher than a set speed per hour, the forward-looking camera detects that a pedestrian is in a set range, the master controller outputs a warning sound effect higher than a set decibel of the environmental noise to the in-automobile audio amplification device and the out-automobile audio amplification device according to the environmental noise detected by the sound wave detection device in real time until the pedestrian leaves the set range of the master controller.
10. A warning unit as claimed in claim 9, said unit including a vehicle hazard flashlamp, wherein said general controller turns on the vehicle hazard flashlamp until the pedestrian leaves the general controller setting.
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