CN210091717U - Distributed vehicle-mounted audio processing system and vehicle-mounted entertainment device - Google Patents
Distributed vehicle-mounted audio processing system and vehicle-mounted entertainment device Download PDFInfo
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Abstract
The utility model provides a distributed vehicle-mounted audio processing system, it includes one or more first type module, one or more second type module, one or more third type module, vehicle-mounted Ethernet gateway. When first type module, second type module, third type module include on-vehicle ethernet interface, first type module, second type module, third type module carry out the electricity through on-vehicle ethernet interface through on-vehicle ethernet bus and on-vehicle ethernet gateway and are connected, compare with prior art, the utility model discloses technical scheme has following beneficial effect: the utility model discloses a distributed on-vehicle audio processing system and on-vehicle amusement device separate sound source equipment, playback devices for these splitter respectively play its own roles, greatly reduced on-vehicle host computer's processing load, can implement this core function of "control" better, and to terminal consumer like the driver, because host computer interface does not produce the change, their operation habit does not change.
Description
Technical Field
The utility model relates to a field is handled to on-vehicle intelligence, especially relates to a distributed vehicle audio frequency processing method, system and vehicle-mounted entertainment device based on ethernet.
Background
In-vehicle entertainment systems have experienced constant innovation in content carriers, communication carriers/protocols, over a long development history. On the background of continuously being brought into the latest technology of the industry, the technology is more and more advanced, and the continuously increasing vehicle-mounted entertainment demand of the terminal consumer is gradually met and further promoted, and the industry supply and demand are in a benign and mutually-promoted rising form.
As an important part of a vehicle-mounted entertainment system, a content carrier experiences a CD, a DVD, an AUX audio port, a plug-in memory (such as a U disk), and the current general mobile phone music, cloud music and the like; meanwhile, the audio transmission mode is derived from the traditional analog audio to the digital audio, and combines the existing communication technology and communication types, including USB audio, Bluetooth audio, SPDIF audio, MOST audio and the like; the number of audio channels has also evolved from the earlier two-channel stereo to multi-channel, surround-sound, etc., such as 5.1,7.1, 11.1, and even the concept of spatial three-dimensional channels has been introduced, such as 11.1.2; after new audio processing concepts and technologies such as voice control, active noise reduction, different sound zones and the like are introduced, the number of on-board audio processing components is inevitably increased continuously and greatly. Of course, the current car audio system is still developing rapidly towards a high-tech trend of higher flow, more nodes, more comfort and more vividness.
On the contrary, compared with the rapid development of audio system technology, the processing scheme of the current vehicle-mounted audio system has not been changed essentially. As is well known, a vehicle audio processing System in the prior art generally comprises an information System, commonly known as a vehicle host (Head Unit), and a speaker System, and when a multichannel speaker System and a high-quality or even a brand sound System need to be supported, the vehicle audio processing System comprises the vehicle host, a vehicle external power amplifier, and the speaker System; that is, all sound source devices, such as a microphone, a radio, multimedia, cloud music, navigation sound, CD/DVD, etc., need to be connected to the vehicle-mounted host, or directly integrated inside the vehicle-mounted host, and the vehicle-mounted host performs processing and operation actions such as sound mixing, transmission, sound effect processing, etc. in a unified manner.
In view of this, the following main problems exist in the technical solutions of the prior art car audio processing system:
1. the nodes of the vehicle-mounted audio are continuously increased, the software processing complexity required by the vehicle-mounted host computer is also continuously increased, and the development complexity and risk of the vehicle-mounted host computer serving as the brain of the vehicle-mounted entertainment system are undoubtedly increased.
2. In the occasions with a large number of vehicle-mounted loudspeakers, one popular existing scheme in the market is to use an external power amplifier to push a plurality of loudspeakers to work, so that the consumption of the high-power amplifier brings great challenges to heat dissipation technical equipment, the design and development of the external power amplifier meeting the requirements of power and heat dissipation also needs a long time and a relatively high technical threshold, and the external power amplifier is also very expensive in price and cost and limits the wide popularization of a vehicle-mounted multi-loudspeaker system to a certain extent.
3. Any audio node modification, whether to the vehicle-mounted host or the vehicle-mounted external power amplifier, may cause considerable software and hardware changes, so that the development cost, the technical compatibility requirement and the processing risk are increased while the flexibility of the technical scheme is lacked.
In view of the above problems 1 and 3, a currently common coping processing manner in the prior art is entertainment system platformization, which improves the universality of the entertainment system platform and thus reduces technical changes as much as possible. In view of the above problem 2, the improvement scheme of the prior art mainly provides a high-efficiency class D power amplifier chip to improve efficiency and optimize heat dissipation performance to reduce risks. However, no optimal improvement scheme based on the overall improvement of the technical scheme of the vehicle-mounted audio processing system is found at present.
In summary, in order to effectively overcome the situation that the vehicle-mounted audio system in the prior art is continuously developing towards a larger flow and more nodes, and the processing scheme of the vehicle-mounted audio system has no essential technical change all the time, and the vehicle-mounted audio system are seriously disconnected and can not adapt to each other, a novel distributed vehicle-mounted audio processing system and method based on the vehicle-mounted ethernet and a vehicle-mounted entertainment device are imperative.
Disclosure of Invention
The utility model solves the problems that the vehicle-mounted audio system in the prior art is continuously developing towards the trend of larger flow and more nodes, and the processing scheme of the vehicle-mounted audio system has no essential technical change all the time, and the vehicle-mounted audio system can not adapt seriously; in order to solve the above problems, the present invention provides a distributed car audio processing system, which includes one or more first type modules, one or more second type modules, one or more third type modules, and a car ethernet gateway;
the first type of module at least comprises an off-board Ethernet interface or a vehicle-mounted Ethernet interface and a control chip, the second type of module at least comprises an off-board Ethernet interface or a vehicle-mounted Ethernet interface and a control chip, and the third type of module at least comprises an off-board Ethernet interface or a vehicle-mounted Ethernet interface, a control chip and a power amplification chip;
when the first type module, the second type module and the third type module comprise vehicle-mounted Ethernet interfaces, the first type module, the second type module and the third type module are electrically connected with a vehicle-mounted Ethernet gateway through a vehicle-mounted Ethernet bus through the vehicle-mounted Ethernet interfaces;
or when the first type module, the second type module and the third type module only comprise the off-board Ethernet interface, the first type module, the second type module and the third type module are electrically connected with the corresponding on-board Ethernet interface conversion module through the off-board Ethernet interface and are electrically connected with the on-board Ethernet gateway through the on-board Ethernet bus;
the first type module, the second type module and the third type module independently process the received signals respectively.
Optionally, in the distributed vehicle-mounted audio processing system, the off-board ethernet interface in the first type module, the second type module, or the third type module at least includes one of a CAN interface, a LIN interface, a MOST interface, and a FlexRay interface.
Optionally, in the distributed vehicle-mounted audio processing system, the first type module is a vehicle-mounted host, the second type module is a sound source module, and the third type module is a sound output module;
the vehicle-mounted host sends a control command to the sound source module and the sound output module through the vehicle-mounted Ethernet gateway through the human-computer interaction interface and receives a feedback command;
and the sound source module receives and transmits audio signals through the vehicle-mounted Ethernet gateway and receives and/or feeds back control commands with the vehicle-mounted host.
Optionally, the distributed vehicle-mounted audio processing system further includes a fourth module, where the fourth module at least includes a digital signal processing chip, a control chip and an ethernet interface, and the fourth module is electrically connected to the vehicle-mounted ethernet gateway through the ethernet interface and via a vehicle-mounted ethernet bus;
the digital signal processing chip comprises one of a DSP digital signal processing chip, an FPGA digital signal processing chip or a special ASIC digital signal processing chip.
Optionally, in the distributed vehicle-mounted audio processing system, the fourth module at least includes a digital signal processing chip, a control chip and an ethernet interface, which are applied to sound effect algorithm processing, and the fourth module is electrically connected through the ethernet interface, the ethernet interface and a vehicle-mounted ethernet bus;
the digital signal processing chip comprises one of a DSP digital signal processing chip, an FPGA digital signal processing chip or a special ASIC digital signal processing chip;
the fourth type of module is a sound effect processing module and is used for processing the received audio signals and transmitting the processed audio signals to the vehicle-mounted host or the sound output module;
the vehicle-mounted host sends a control command to the sound effect processing module through the vehicle-mounted Ethernet gateway through the human-computer interaction interface and receives a feedback instruction;
and the sound effect processing module receives and transmits audio signals through the vehicle-mounted Ethernet gateway and receives and/or feeds back control commands with the vehicle-mounted host.
Optionally, in the distributed vehicle-mounted audio processing system, the audio signal is transmitted to the vehicle-mounted ethernet gateway through the sound source module based on the vehicle-mounted ethernet bus, and then is accessed to the ethernet through the vehicle-mounted ethernet gateway monitoring and processing device, so as to complete data forwarding and state management between networks;
the vehicle-mounted host controls the transmission of the audio signal of the audio source module and the processing of related data.
Optionally, in the distributed vehicle-mounted audio processing system, the vehicle-mounted host at least includes a volume setting component, a sound field setting component, and a sound effect setting component, which are in communication with each other.
Optionally, in the distributed vehicle-mounted audio processing system, the sound source module at least includes one of a microphone module, a radio module, multimedia music, and a voice recognition and control module.
Optionally, in the distributed vehicle-mounted audio processing system, the sound output module at least includes one of a speaker module, an earphone module, and a sound reproduction module.
Optionally, in the distributed vehicle-mounted audio processing system, the vehicle-mounted host controls transmission, sound mixing, and mode switching of each sound source module, and sound effect processing of the sound source modules is completed by processing of power amplification processing chips provided in each sound source module.
Optionally, in the distributed vehicle-mounted audio processing system, the vehicle-mounted host controls transmission, sound mixing and mode switching of each sound source module, and sound effect processing of the sound source modules is completed by processing of power amplification processing chips arranged in each sound source module or by the sound effect processing module.
Optionally, in the distributed vehicle-mounted audio processing system, the speaker module includes an active device provided with a PCBA, and the control chip, the power amplification IC chip, and the ethernet interface are disposed on the PCBA;
the control chip is used for controlling the power-on and power-off of the PCBA and the working logic;
the power amplification IC chip is used for carrying out digital-to-analog conversion and EQ tuning on audio signals, converting the processed digital audio signals into analog signals and then pushing a loudspeaker device to output sound through power amplification;
and the vehicle-mounted Ethernet interface application receives the digital audio signal and transmits the digital signal subjected to EQ tuning back to the vehicle-mounted Ethernet network for node reference.
Optionally, in the distributed vehicle-mounted audio processing system, a front end component is packaged on a control chip in the speaker module, and an EQ debugging component and a multi-channel sound output component are packaged on a power chip;
the front-end component is used for receiving Ethernet digital audio and control signals;
the EQ debugging component is used for performing digital-to-analog conversion and signal amplification functions;
the output assembly has a multi-path sound output function.
Optionally, in the distributed vehicle-mounted audio processing system, the vehicle-mounted ethernet interface conversion module includes a module conversion chip, a conversion interface, and a vehicle-mounted ethernet interface, and the module conversion chip, the conversion interface, and the vehicle-mounted ethernet interface are mounted on the circuit board and can communicate with each other.
Optionally, in the distributed vehicle-mounted audio processing system, the type of the conversion interface is the same as or compatible with the type of the interface of the module to be docked;
the type of the conversion interface comprises one of a CAN interface, a LIN interface, a MOST interface and a FlexRay interface.
Optionally, in the distributed vehicle-mounted audio processing system, the module conversion chip is configured to convert the received standard format signal of the off-vehicle ethernet into a vehicle-mounted ethernet signal meeting the standard, and transmit the vehicle-mounted ethernet signal through the vehicle-mounted ethernet;
or converting the standard format signal of the vehicle-mounted Ethernet into the standard format signal of the off-board Ethernet for transmission.
Optionally, in the distributed vehicle-mounted audio processing system, the module conversion chip is configured to convert through a conversion mapping table pre-loaded between different standard protocols, and the data format conversion processing is performed by invoking the mapping table through a processor on the module conversion chip.
Optionally, in the distributed car audio processing system, the car ethernet gateway includes a multi-path extensible communication interface.
The utility model also provides a vehicle-mounted entertainment device, it includes the aforesaid arbitrary distributed vehicle-mounted audio processing system.
Compared with the prior art, the utility model discloses technical scheme has following beneficial effect: the utility model discloses a distributed on-vehicle audio processing system, method and on-vehicle amusement device are with sound source equipment, and playback devices separates for these splitter respectively play its own roles, greatly reduced the processing load of on-vehicle host computer, can implement this core function of "control" better, and to terminal consumer like the driver, because the host computer interface does not produce the change, their operation custom does not change.
In addition, the vehicle-mounted Ethernet interface conversion module is adopted for transmitting signals based on different protocols, the received signals in the standard format of the off-board Ethernet are converted into vehicle-mounted Ethernet signals meeting the standard to be transmitted through the vehicle-mounted Ethernet or the signals in the standard format of the vehicle-mounted Ethernet are converted into the signals in the standard format of the off-board Ethernet to be transmitted, and the vehicle-mounted Ethernet interface conversion module is used, so that the signals or data transmission based on the CAN protocol, the LIN protocol, the MOST protocol and the vehicle-mounted Ethernet protocol is realized, and the load of processing of a vehicle-mounted Ethernet gateway is reduced. Otherwise, the transmission between the protocols is performed through the vehicle-mounted ethernet gateway, and if the conversion between the various protocols is processed through the vehicle-mounted ethernet gateway, the load of the vehicle-mounted ethernet gateway is aggravated, and data loss is generated in severe cases. By adopting the vehicle-mounted Ethernet interface conversion module, the data transmission based on different module protocols can be converted in time, the processing load of a gateway of the vehicle-mounted Ethernet is reduced, and the transmission rate is improved.
Drawings
Fig. 1 is a schematic diagram of the structure of a conventional in-vehicle host audio system of the prior art.
Fig. 2 is a schematic diagram of a module structure of the distributed vehicle audio processing system based on ethernet.
Fig. 3 is a schematic block diagram of another embodiment of the distributed car audio processing system based on ethernet according to the present invention.
Fig. 4 is a schematic structural diagram of a fourth module of the distributed ethernet-based car audio processing system of the present invention.
Fig. 5 is a schematic structural diagram of the microphone module of the distributed car audio processing system based on ethernet according to the present invention.
Fig. 6 is a schematic diagram of the vehicle-mounted hardware structure of the distributed vehicle-mounted audio processing system based on ethernet.
Fig. 7 is a schematic structural diagram of the vehicle-mounted ethernet interface conversion module of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
The utility model provides a distributed vehicle-mounted audio processing system based on vehicle-mounted Ethernet. The processing system is a system for realizing cooperative work and resource sharing by the mutual communication of all audio nodes in the vehicle based on the vehicle-mounted Ethernet technology. The in-vehicle Ethernet with high bandwidth, high reliability and real-time performance ensures the stability and real-time performance of audio data transmission of each node in the vehicle and provides the flow required by high-quality multi-channel audio transmission; the distributed system can distribute complex functions which are only completed in a vehicle-mounted host or a vehicle-mounted power amplifier in a centralized manner to each node originally, so that the complexity and risk of each single node are effectively reduced, and the flexibility of the whole scheme of the processing system is greatly improved.
The following details will be presented in the following embodiments of the distributed vehicle audio processing method and system based on the vehicle ethernet of the present invention:
the utility model discloses the transmission of audio signal and control signal of distributed audio processing system based on vehicle-mounted Ethernet is unified based on vehicle-mounted Ethernet bus, this is also based on the future development trend of whole car network communication bus; the audio signal processing of each audio node is completed by each node, namely, the content which is originally unified at the vehicle-mounted host side or the external power amplifier side is separated; the hardware product form of each node also changes correspondingly, and particularly, an Ethernet interface is uniformly added to match with the whole vehicle audio transmission network.
As can be seen from the conventional vehicle-mounted audio processing system shown in fig. 1, the audio load borne by the interior of the conventional vehicle-mounted host is quite heavy, and particularly after original consumer audio industry contents such as voice assistant/voice recognition, microphone arrays, even a karaoke system and the like are continuously introduced into the vehicle-mounted host audio processing system, development of the vehicle-mounted host in the conventional manner is more complex, and development cost and risk are higher and higher.
Example one
The distributed vehicle audio processing system based on vehicle ethernet of the present invention as shown in fig. 2 separates the centralized system of the prior art in fig. 1 into nodes, and it is noted that the separation is not randomly distributed, but divided according to logic and correlation.
The utility model discloses a distributed vehicle audio processing system based on vehicle-mounted Ethernet includes at least: one or more first-class modules, one or more second-class modules, one or more third-class modules and a vehicle-mounted Ethernet gateway; the first type of module at least comprises an off-board Ethernet interface or a vehicle-mounted Ethernet interface and a control chip, the second type of module at least comprises an off-board Ethernet interface or a vehicle-mounted Ethernet interface and a control chip, and the third type of module at least comprises an off-board Ethernet interface or a vehicle-mounted Ethernet interface, a control chip and a power amplification chip; when the first type module, the second type module and the third type module comprise vehicle-mounted Ethernet interface modules, the first type module, the second type module and the third type module are electrically connected with a vehicle-mounted Ethernet gateway through a vehicle-mounted Ethernet interface via a vehicle-mounted Ethernet bus; or when the first type module, the second type module and the third type module only comprise the non-vehicle-mounted Ethernet interface module, the first type module, the second type module and the third type module are electrically connected with the corresponding vehicle-mounted Ethernet interface conversion module through the non-vehicle-mounted Ethernet interface and are electrically connected with the vehicle-mounted Ethernet gateway through the vehicle-mounted Ethernet bus; the first type module, the second type module and the third type module can independently process respective received signals. The off-board Ethernet interface in the first type module, the second type module or the third type module at least comprises one of a CAN interface, a LIN interface, a MOST interface and a FlexRay interface. The first type module is a vehicle-mounted host, the second type module is a sound source module, and the third type module is a sound output module;
as shown in fig. 4, the distributed vehicle-mounted audio processing system further includes a fourth module, where the fourth module at least includes a digital signal processing chip, a control chip and an ethernet interface, and the fourth module is electrically connected to the vehicle-mounted ethernet gateway through the ethernet interface and via a vehicle-mounted ethernet bus; the digital signal processing chip comprises one of a DSP digital signal processing chip, an FPGA digital signal processing chip or a special ASIC digital signal processing chip. The fourth module at least comprises a digital signal processing chip applied to sound effect algorithm processing, a control chip and an Ethernet interface, and is electrically connected with the vehicle-mounted Ethernet bus through the Ethernet interface and the Ethernet interface; the digital signal processing chip comprises one of a DSP digital signal processing chip, an FPGA digital signal processing chip or a special ASIC digital signal processing chip; the fourth type of module is a sound effect processing module, is applied to processing the received audio signals and transmits the processed audio signals to the vehicle-mounted host or the sound output module.
As shown in fig. 3, the distributed vehicle-mounted audio processing system further includes a vehicle-mounted ethernet interface conversion module, which includes a module conversion chip, a conversion interface, and a vehicle-mounted ethernet interface, where the module conversion chip, the conversion interface, and the vehicle-mounted ethernet interface are mounted on the circuit board and can communicate with each other. The type of the conversion interface is the same as or compatible with the type of the interface of the module to be docked; the conversion interface type comprises one of a CAN interface, a LIN interface, a MOST interface and a FlexRay interface. The module conversion chip is used for converting the received standard format signal of the off-board Ethernet into a standard-compliant vehicle-mounted Ethernet signal and transmitting the standard-compliant vehicle-mounted Ethernet signal through the vehicle-mounted Ethernet; or converting the standard format signal of the vehicle-mounted Ethernet into the standard format signal of the off-board Ethernet for transmission. The module conversion chip converts through a conversion mapping table between different standard protocols loaded in advance, and the data format conversion processing is carried out through a processor on the module conversion chip calling the mapping table.
The vehicle-mounted host computer: the system at least comprises a volume setting component, a sound field setting component and a sound effect setting component which are communicated with each other, and the system only sends a control command to each sound source module, the sound effect module, the loudspeaker module, the earphone module and other sound reproduction modules through a gateway through a human-computer interaction interface and simultaneously receives and feeds back instructions of the sound source modules, the sound effect module, the loudspeaker module, the earphone module and other sound reproduction modules.
The sound source module is: the sound source module comprises a plurality of functional modules, audio signals of the sound source module are transmitted to the vehicle-mounted Ethernet gateway through the sound source module based on a vehicle-mounted Ethernet bus, and then are accessed to the Ethernet through the vehicle-mounted Ethernet gateway monitoring and processing equipment, so that data forwarding and state management among networks are completed; including but not limited to: a microphone module, a radio module, multimedia music, a voice controller and the like; the sound source module is connected to the Ethernet gateway based on the vehicle-mounted Ethernet bus, and the vehicle-mounted host controls the transmission, sound mixing, mode switching and the like of each sound source module, but sound effect processing is automatically completed by each sound source module, for example, beam forming of the microphone module, echo cancellation, voice control, voice broadcasting and the like, and one of the realization modes can be that each sound source module is added with a DSP chip to perform sound effect processing. Of course, some cases may be accomplished by the sound effect module described below.
The sound effect module is: based on some advanced sound effect requirements, especially for multimedia music, sound quality improvement of audio output of a radio, multi-channel surround sound effect, and improvement of NVH of the whole vehicle, such as active noise reduction ANC, the method can also be used for realizing the sound source module-based method: the microphone module receives audio signals and has the functions of beam forming, echo cancellation, voice control, playing and the like. The module mainly comprises: one or more DSP chips and Ethernet transmission interface, connected with the sound source module, Ethernet gateway and vehicle host, wherein, the audio source module and Ethernet gateway are used to receive and send audio signal and the vehicle host is used to receive or feedback control command.
The Ethernet Gateway (CAN Ethernet Gateway): the utility model discloses the responsibility among the distributed vehicle audio processing system is mainly the transmission of the audio signal of each audio node, the audio mixing, and distribute each control command, etc.; the specific performance is different according to the Ethernet SWITCH chips of different manufacturers and different models.
The speaker module: the loudspeaker module comprises an active device provided with a PCBA, wherein the control chip, the power amplification IC chip and the Ethernet interface are arranged on the PCBA; the control chip is used for controlling the power-on and power-off of the PCBA and the working logic; the power amplification IC chip is used for carrying out digital-to-analog conversion and EQ tuning on audio signals, converting the processed digital audio signals into analog signals and then pushing a loudspeaker device to output sound through power amplification; and the vehicle-mounted Ethernet interface application receives the digital audio signal and transmits the digital signal subjected to EQ tuning back to the vehicle-mounted Ethernet network for reference of other nodes. The control chip in the speaker module is provided with a front end component in an encapsulating way, and an EQ debugging component and a multi-path sound output component are encapsulated on a power chip; a front-end component for receiving Ethernet digital audio and control signals; the EQ debugging component is used for performing digital-to-analog conversion and signal amplification functions; and the output assembly has a multi-path sound output function.
The multichannel speaker module that is connected to the ethernet gateway based on the vehicle ethernet bus, its difference with the speaker module of prior art lies in: traditional speaker is only a physical device that receives analog audio signal and plays, the utility model discloses speaker module among the on-vehicle audio processing system of distributing type includes: a front end for receiving Ethernet digital audio and control signals; the EQ debugging component is used for performing digital-to-analog conversion and signal amplification functions; is an active module with PCBA hardware circuit board and package.
The earphone module and the other playback module: connected to the ethernet gateway over the in-vehicle ethernet bus is an active module similar to the speaker module described above. And will not be described in detail herein.
To sum up, the utility model discloses thoroughly subversing the complex degree that realizes all audio among the prior art in the chip of on-vehicle host computer is high, the risk is high and with high costs the condition, and it includes that sound source, audio frequency processing each module etc. all set up and increase a plurality of processing chips or increase the function that other functional modules realized the audio signal processing of each node in original chip at each node. For audio signal transmission, all audio signals are transmitted, received, processed and controlled and fed back through the vehicle-mounted host to be changed into a state that all nodes are distributed through the gateway and all nodes participate in processing, so that the load of the vehicle-mounted host is greatly reduced, and the problems of other high risks, high cost and the like associated with the vehicle-mounted host are solved.
The audio signal processing of each audio node is related, and the following steps are completed by each node: increase the chip or increase functional module in having the chip, will unify originally and separate out at the content of host computer side or external power amplifier side: firstly, software algorithm is stripped, and then related hardware interfaces and structures are saved, so that the vehicle-mounted host becomes smaller and lighter; the hardware product form of each node also changes correspondingly: the interfaces of all the nodes are unified to support the vehicle-mounted Ethernet, passive devices in the prior art are all active devices, a functional circuit board is added, and a power supply needs to be connected.
Use below the utility model discloses a sound source module and broadcast module describe for the embodiment in detail:
1. a microphone module: specifically, as shown in fig. 5, compared with the conventional microphone module of the prior art: the mode of sound pickup, PCM/PDM digital signal output and direct connection to the host circuit board is different, the microphone module under the concept of the distributed system of the utility model is only unchanged in the sound pickup part, the interface is changed into an Ethernet interface, which not only outputs digital audio signals, but also receives the digital audio signals, including, for example, reference and control signals from the speaker module, such as from an in-vehicle host, in addition, echo cancellation, noise reduction, beam forming and other algorithm processing which are closely related to the microphone originally performed on the vehicle-mounted host side are completed in the microphone module at present, so that the microphone module can output a 'clean' signal without interference so as to facilitate subsequent related module work, such as a voice recognition and control module and the like.
2. A speaker module: as shown in fig. 6, the speaker module of the present invention is not a passive device, but an active device with PCBA design added thereto, and the module mainly includes the following module components capable of implementing the following functions:
the control chip can be an MCU microprocessor chip or other processors with operation processing capability, and is used for controlling the power-on and power-off of the active loudspeaker PCBA, working logic and the like.
The power amplification IC chip needs to have digital-to-analog conversion and EQ functions, so that EQ tuning for each loudspeaker can be independently completed, processed digital audio is converted into an analog signal, and then the loudspeaker device is pushed to sound through power amplification.
And the Ethernet interface receives the digital audio signals transmitted by other modules on the one hand, and transmits the digital signals subjected to EQ processing back to the vehicle-mounted Ethernet network for reference of other nodes on the other hand.
In the foregoing embodiments, it is mentioned that the structure of each active speaker module may be difficult to achieve the target or the protection manner of intellectual property is not friendly in some situations where the requirements for music processing effect or sound effect are high. At this time, it is considered that a sound effect processing module is added, the structure is specifically shown in fig. 4, a core part of the module is to add a DSP (digital signal processing) chip, the number of the DSP chip can be set as one or more blocks according to the requirement, and the sound effect processing module further includes: the control chip can be an MCU (microprogrammed control Unit) chip or other processors with operation processing capacity and is used for controlling the power-on and power-off of the PCBA (printed Circuit Board Assembly) of the active loudspeaker, working logic and the like; and the Ethernet interface receives the digital audio signals transmitted by other modules on the one hand and transmits the digital signals subjected to EQ processing to the vehicle-mounted Ethernet network for reference of other nodes on the other hand. In this way, some advanced or IP-enabled audio-effect algorithms may be implemented, such as Dolby surround sound, etc. The mode of adding the sound effect processing module can effectively meet the realization requirement of advanced sound effect.
Example two
The utility model discloses distributed audio processing method based on-vehicle ethernet, it is shown as figure 6, includes at least:
the three types of modules are electrically connected with a vehicle-mounted Ethernet gateway through a vehicle-mounted Ethernet interface through a vehicle-mounted Ethernet bus:
the first type of module at least comprises an off-board Ethernet interface or a vehicle-mounted Ethernet interface and a control chip, the second type of module at least comprises an off-board Ethernet interface or a vehicle-mounted Ethernet interface and a control chip, and the third type of module at least comprises an off-board Ethernet interface or a vehicle-mounted Ethernet interface, a control chip and a power amplification chip; when the first type module, the second type module and the third type module comprise vehicle-mounted Ethernet interface modules, the first type module, the second type module and the third type module are electrically connected with a vehicle-mounted Ethernet gateway through a vehicle-mounted Ethernet interface via a vehicle-mounted Ethernet bus.
The three types of modules are electrically connected with the corresponding vehicle-mounted Ethernet interface conversion module through the non-vehicle-mounted Ethernet interface and are electrically connected with the vehicle-mounted Ethernet gateway through the vehicle-mounted Ethernet bus:
when the first type module, the second type module and the third type module only comprise the non-vehicle-mounted Ethernet interface module, the first type module, the second type module and the third type module are electrically connected with the corresponding vehicle-mounted Ethernet interface conversion module through the non-vehicle-mounted Ethernet interface and are electrically connected with the vehicle-mounted Ethernet gateway through the vehicle-mounted Ethernet bus; the first type module, the second type module and the third type module can independently process respective received signals. The off-board Ethernet interface in the first type module, the second type module or the third type module at least comprises one of a CAN interface, a LIN interface, a MOST interface and a FlexRay interface. The first type of module is a vehicle-mounted host, the second type of module is a sound source module, and the third type of module is a sound output module.
The fourth module is electrically connected with the vehicle-mounted Ethernet gateway through the Ethernet interface and the vehicle-mounted Ethernet bus or the fourth module is electrically connected with the vehicle-mounted Ethernet gateway through the Ethernet interface and the vehicle-mounted Ethernet bus;
the distributed vehicle-mounted audio processing system also comprises a fourth module, wherein the fourth module at least comprises a digital signal processing chip, a control chip and an Ethernet interface which are applied to sound effect algorithm processing, and the fourth module is electrically connected with a vehicle-mounted Ethernet gateway through the Ethernet interface and a vehicle-mounted Ethernet bus; the digital signal processing chip comprises one of a DSP digital signal processing chip, an FPGA digital signal processing chip or a special ASIC digital signal processing chip.
The fourth module at least comprises a digital signal processing chip applied to sound effect algorithm processing, a control chip and an Ethernet interface, and is electrically connected with the vehicle-mounted Ethernet bus through the Ethernet interface and the Ethernet interface; the digital signal processing chip comprises one of a DSP digital signal processing chip, an FPGA digital signal processing chip or a special ASIC digital signal processing chip.
The fourth type of module is a sound effect processing module, is applied to processing the received audio signals and transmits the processed audio signals to the vehicle-mounted host or the sound output module.
The implementation manner of the above embodiment may specifically be: a distributed vehicle audio processing method is applied to a distributed vehicle audio processing system, and at least comprises a vehicle host, a sound source module and an Ethernet gateway which are connected with each other based on a vehicle Ethernet, and optionally comprises a sound effect module: the audio signal is transmitted to the Ethernet gateway through the sound source module based on the vehicle-mounted Ethernet bus; the Ethernet gateway monitoring and processing equipment is accessed to the Ethernet to complete data forwarding and state management between networks; the vehicle-mounted host controls the transmission of the audio signal of the audio source module and the processing of related data.
EXAMPLE III
The third embodiment of the utility model provides a computer readable storage medium, its upper storage has computer program, and this program is carried out by the treater and is realized like the utility model discloses a distributed vehicle audio frequency processing method that the embodiment provides is applied to distributed vehicle audio frequency processing system, and it includes vehicle-mounted host computer, sound source module and ethernet gateway based on vehicle-mounted ethernet interconnect at least: the audio signal is transmitted to the Ethernet gateway through the sound source module based on the vehicle-mounted Ethernet bus; the Ethernet gateway monitoring and processing equipment is accessed to the Ethernet to complete data forwarding and state management between networks; the vehicle-mounted host controls the transmission of the audio signal of the audio source module and the processing of related data. Any combination of one or more computer-readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
Example four
As shown in fig. 7, the present invention further provides an embodiment of a vehicle ethernet standard conversion module: the vehicle-mounted Ethernet interface conversion module comprises an off-board Ethernet transmission module, a vehicle-mounted Ethernet transmission module and a mapping table, wherein the off-board Ethernet interface conversion module comprises one of CAN, LIN, MOST and FlexRay.
The vehicle-mounted Ethernet transmission module is used for unpacking and/or packing signals conforming to a vehicle-mounted Ethernet protocol, the CAN transmission module is used for unpacking and/or packing signals conforming to the CAN protocol, the mapping table is in communication connection with the vehicle-mounted Ethernet transmission module and the CAN transmission module and used for decoding mutual conversion between the signals of the vehicle-mounted Ethernet protocol and the signals of the CAN protocol, and the mapping table comprises a mapping table corresponding to a CAN address identification code (CAN ID) and a Message address identification code (Message ID) of the vehicle-mounted Ethernet.
The vehicle-mounted Ethernet gateway sends signals to the CAN network as follows: the method comprises the steps that a signal based on the vehicle-mounted Ethernet sent by a vehicle-mounted Ethernet gateway is firstly transmitted to a module conversion chip through a vehicle-mounted Ethernet interface, then a vehicle-mounted Ethernet transmission module unpacks according to a vehicle-mounted Ethernet protocol, the unpacking process comprises the steps of analyzing the received signal transmitted according to the vehicle-mounted Ethernet protocol, separating an information address identification code (Message ID) and a load signal (payload), then calling a mapping table, analyzing the CAN ID corresponding to the Message ID, transmitting the analyzed CAN ID and the load signal to a CAN transmission module, and transmitting the signal to a CAN network or a vehicle-mounted terminal or a microphone module with a CAN interface through the CAN interface after the CAN transmission module packages the CAN ID and the load signal according to the CAN protocol.
The signals transmitted by the CAN network are transmitted to the vehicle-mounted Ethernet gateway as follows: if the vehicle-mounted terminal transmits the CAN signal to the vehicle-mounted Ethernet interface conversion module through the CAN interface, then the CAN transmission module in the module conversion chip unpacks according to the CAN protocol, the unpacking process comprises the steps of analyzing the received signal transmitted according to the CAN protocol, separating out a CAN address identification code (CAN ID) and a load signal (payload), then calling a mapping table, analyzing a Message ID used for CAN ID pairing, transmitting the analyzed Message ID and the load signal to the vehicle-mounted Ethernet transmission module, and the vehicle-mounted Ethernet transmission module packs the Message ID and the load signal and transmits the information to the vehicle-mounted Ethernet network through the vehicle-mounted Ethernet interface.
EXAMPLE five
The utility model also provides a vehicle-mounted entertainment device, it includes aforementioned distributed vehicle-mounted audio processing system, realizes aforementioned distributed vehicle-mounted audio processing method, reaches the utility model discloses aforementioned embodiment's treatment effect is no longer repeated here.
Although the present invention has been disclosed in the preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can use the above-mentioned method and technical contents to make possible changes and modifications to the technical solution of the present invention without departing from the spirit and scope of the present invention, therefore, any simple modification, equivalent changes and modifications made to the above embodiments by the technical substance of the present invention all belong to the protection scope of the technical solution of the present invention.
Claims (19)
1. The distributed vehicle-mounted audio processing system is characterized by comprising one or more first-class modules, one or more second-class modules, one or more third-class modules and a vehicle-mounted Ethernet gateway;
the first type of module at least comprises an off-board Ethernet interface or a vehicle-mounted Ethernet interface and a control chip, the second type of module at least comprises an off-board Ethernet interface or a vehicle-mounted Ethernet interface and a control chip, and the third type of module at least comprises an off-board Ethernet interface or a vehicle-mounted Ethernet interface, a control chip and a power amplification chip;
when the first type module, the second type module and the third type module comprise vehicle-mounted Ethernet interface modules, the first type module, the second type module and the third type module are electrically connected with a vehicle-mounted Ethernet gateway through a vehicle-mounted Ethernet interface via a vehicle-mounted Ethernet bus;
or when the first type module, the second type module and the third type module only comprise the non-vehicle-mounted Ethernet interface module, the first type module, the second type module and the third type module are electrically connected with the corresponding vehicle-mounted Ethernet interface conversion module through the non-vehicle-mounted Ethernet interface and are electrically connected with the vehicle-mounted Ethernet gateway through the vehicle-mounted Ethernet bus;
the first type module, the second type module and the third type module can independently process respective received signals.
2. The distributed car audio processing system according to claim 1, wherein said off-board ethernet interface of said first or second or third module type comprises at least one of a CAN interface, a LIN interface, a MOST interface, and a FlexRay interface.
3. The distributed vehicular audio processing system according to claim 1, wherein the first module is a vehicular host, the second module is an audio source module, and the third module is an audio output module;
the vehicle-mounted host sends a control command to the sound source module and the sound output module through the vehicle-mounted Ethernet gateway through the human-computer interaction interface and receives a feedback command;
and the sound source module receives and transmits audio signals through the vehicle-mounted Ethernet gateway and receives and/or feeds back control commands with the vehicle-mounted host.
4. The distributed vehicle audio processing system according to claim 1, further comprising a fourth module, wherein the fourth module at least comprises a digital signal processing chip, a control chip and an ethernet interface, and the fourth module is electrically connected to the vehicle ethernet gateway through the ethernet interface and via the vehicle ethernet bus;
the digital signal processing chip comprises one of a DSP digital signal processing chip, an FPGA digital signal processing chip or a special ASIC digital signal processing chip.
5. The distributed vehicle audio processing system according to claim 3, further comprising a fourth module, wherein the fourth module at least comprises a digital signal processing chip, a control chip and an ethernet interface for audio effect algorithm processing, and the fourth module is electrically connected through the ethernet interface, the ethernet interface and the vehicle ethernet bus;
the digital signal processing chip comprises one of a DSP digital signal processing chip, an FPGA digital signal processing chip or a special ASIC digital signal processing chip;
the fourth type of module is a sound effect processing module, is applied to processing received audio signals and transmits the processed audio signals to the vehicle-mounted host or the sound output module;
the vehicle-mounted host sends a control command to the sound effect processing module through the vehicle-mounted Ethernet gateway through the human-computer interaction interface and receives a feedback instruction;
and the sound effect processing module receives and transmits audio signals through the vehicle-mounted Ethernet gateway and receives and/or feeds back control commands with the vehicle-mounted host.
6. The distributed vehicle-mounted audio processing system according to claim 3, wherein the audio signal is transmitted to the vehicle-mounted ethernet gateway through the sound source module based on the vehicle-mounted ethernet bus, and then is accessed to the ethernet through the vehicle-mounted ethernet gateway monitoring and processing device, thereby completing data forwarding and state management between networks;
the vehicle-mounted host controls the transmission of the audio signal of the audio source module and the processing of related data.
7. The distributed car audio processing system according to claim 3, wherein said car host comprises at least a volume setting component, a sound field setting component, and a sound effect setting component, which are in communication with each other.
8. The distributed vehicular audio processing system according to claim 3, wherein the sound source module comprises at least one of a microphone module, a radio module, multimedia music, and a voice recognition and control module.
9. The distributed vehicular audio processing system according to claim 3, wherein the sound output module comprises at least one of a speaker module, an earphone module, and a sound reproduction module.
10. The distributed vehicular audio processing system according to claim 3, wherein the vehicular host controls transmission, sound mixing, and mode switching of each audio source module, and sound effect processing of the audio source modules is performed by a power amplification processing chip of each audio source module.
11. The distributed vehicular audio processing system according to claim 5, wherein the vehicular host controls transmission, sound mixing, and mode switching of each audio source module, and the audio processing of the audio source module is performed by a power amplification processing chip of each audio source module or by an audio processing module.
12. The distributed vehicle audio processing system of claim 9, wherein the speaker module comprises an active device provided with a PCBA, wherein the control chip, the power amplification IC chip and the ethernet interface are provided on the PCBA;
the control chip is used for controlling the power-on and power-off of the PCBA and the working logic;
the power amplification IC chip is used for carrying out digital-to-analog conversion and EQ tuning on audio signals, converting the processed digital audio signals into analog signals and then pushing a loudspeaker device to output sound through power amplification;
and the vehicle-mounted Ethernet interface application receives the digital audio signal and transmits the digital signal subjected to EQ tuning back to the vehicle-mounted Ethernet network for node reference.
13. The distributed vehicle audio processing system according to claim 12, wherein the control chip in the speaker module is packaged with a front end component, and the power chip is packaged with an EQ debugging component and a multi-channel sound output component;
a front-end component for receiving Ethernet digital audio and control signals;
the EQ debugging component is used for performing digital-to-analog conversion and signal amplification functions;
and the output assembly has a multi-path sound output function.
14. The distributed vehicle audio processing system according to claim 1, wherein the vehicle ethernet interface conversion module comprises a module conversion chip, a conversion interface, and a vehicle ethernet interface, and the module conversion chip, the conversion interface, and the vehicle ethernet interface are mounted on the circuit board and can communicate with each other.
15. The distributed vehicle audio processing system of claim 14, wherein the type of the translation interface is the same as or compatible with the type of interface requiring the docking module;
the type of the conversion interface comprises one of a CAN interface, a LIN interface, a MOST interface and a FlexRay interface.
16. The distributed vehicle audio processing system according to claim 14, wherein the module conversion chip is configured to convert the received standard format signal of the off-board ethernet into a vehicle ethernet signal conforming to a standard for transmission via the vehicle ethernet;
or converting the standard format signal of the vehicle-mounted Ethernet into the standard format signal of the off-board Ethernet for transmission.
17. The distributed car audio processing system according to claim 16, wherein the module conversion chip performs conversion by means of a conversion mapping table pre-loaded between different standard protocols, and the data format conversion process is performed by means of a processor on the module conversion chip calling the mapping table.
18. The distributed vehicle audio processing system of claim 1, wherein the vehicle ethernet gateway comprises a multiplexed scalable communication interface.
19. An in-vehicle entertainment device comprising a distributed in-vehicle audio processing system according to any of claims 1 to 18.
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