CN115022776B - Airborne comprehensive audio processing unit - Google Patents
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- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
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Abstract
The invention relates to the technical field of voice communication under an airborne platform, and particularly discloses an airborne integrated audio processing unit. The on-board integrated audio processing unit includes: the device comprises an analog audio interface module, a digital audio processing module and an encryption/decryption module; the analog audio interface module is realized based on an FPGA interface processing circuit and is configured to finish analog voice acquisition, discrete signal acquisition and interface matching; the digital audio processing module is realized on the basis of a CPU processor and is configured to finish voice noise reduction and voice enhancement of the digitized audio signals, and comprises weighting and sound mixing processing on each path of audio signals on the basis of requirements, automatic gain control on audio, generation of tone warning sound and voice warning sound on the basis of requirements, and finishing unpacking and packing processing of voice data; the encryption/decryption module is configured to complete encryption and/or decryption of voice; the requirements of the modern airplane on the integration, miniaturization and strong anti-interference capability of airborne equipment are met.
Description
Technical Field
The invention relates to the technical field of voice communication under an airborne platform, and particularly discloses an airborne integrated audio processing unit.
Background
The integrated audio processing unit is an important functional unit of an airborne platform electronic system, completes tasks such as pilot built-in conversation, external conversation, secret communication, command guidance, navigation sound receiving, flight state warning and the like, and plays a key role in safety and command control of the aircraft. The traditional audio processing unit adopts an analog audio technology to transmit voice signals, and adopts a large number of discrete devices to build circuits such as an audio acquisition circuit, an audio processing circuit, an audio amplification circuit and the like.
The traditional audio processing unit mainly has the following four defects:
firstly, the debugging of equipment parameters is complicated, and the work load is big. Because the traditional audio processing unit is built by adopting a large number of discrete devices, the performance of the production equipment at different time may have larger difference due to the process, the batch and other reasons of the parameters of the devices, so that the parameters of each equipment need to be fully and specifically debugged and tested, and a large amount of time cost is consumed.
Secondly, the reference equipment is easy to be interfered and has poor electromagnetic compatibility. Because the traditional audio processing unit is built by adopting a large number of discrete devices, the connection circuit relationship between the discrete devices is large and complex, parasitic parameters between the devices and the connection circuit are difficult to calculate, equipment is easy to be interfered by other equipment, other equipment can be interfered, and the electromagnetic compatibility performance is poor.
Thirdly, the parameter equipment is difficult to change and expand, and the integration level is poor. Because the traditional audio processing unit is built by adopting a large number of discrete devices, once the design of the equipment is completed, the equipment is difficult to change and expand, and the integration level of the equipment is poor.
Fourthly, the reliability of the equipment is poor, and the volume and the weight of the equipment are large. Because a traditional audio processing unit is built by adopting a large number of discrete devices, the more discrete devices, the poorer the reliability of the equipment and the larger the volume and weight of the equipment.
The traditional audio processing unit has the defects of complex parameter debugging, easy interference, difficult change and expansion, poor reliability, large equipment volume and weight and the like, and is not suitable for the application in the avionics field with high integration, expandable and reconfigurable capability, weight reduction requirement and complex electromagnetic environment.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides an airborne integrated audio processing unit, and compared with the traditional airborne audio processing unit, the airborne integrated audio processing unit has the characteristics of simple parameter debugging, multi-channel input/output, configurable parameter/speed, expandable/reconfigurable voice channel, capability of carrying out voice noise reduction/voice enhancement processing on audio signals, weighting and sound mixing processing on multi-channel audio signals according to actual requirements, automatic gain control on audio, generation of tone warning sound and voice warning sound according to actual requirements and the like, and particularly can meet the requirements of integration, miniaturization and strong anti-interference capability of modern airplanes on airborne equipment.
The purpose of the invention is realized by the following technical scheme:
an onboard integrated audio processing unit, the onboard integrated audio processing unit comprising: the device comprises an analog audio interface module, a digital audio processing module and an encryption/decryption module;
the analog audio interface module is realized on the basis of an FPGA interface processing circuit and is configured to complete analog voice acquisition, discrete signal acquisition and interface matching;
the digital audio processing module is realized on the basis of a CPU processor and is configured to finish voice noise reduction and voice enhancement of the digitized audio signals, and comprises weighting and sound mixing processing on each path of audio signals on the basis of requirements, automatic gain control on audio, generation of tone warning sound and voice warning sound on the basis of requirements, and finishing unpacking and packing processing of voice data;
the encryption/decryption module is configured to complete encryption and/or decryption of speech;
when the onboard integrated audio processing unit outputs voice, the digital audio processing module unpacks the received digital voice according to a protocol, writes voice data and control parameters after digital voice processing into an output voice cache of the FPGA interface processing circuit through a bus and synchronously sends an interrupt signal to the FPGA interface processing circuit,
after receiving the interrupt signal sent by the digital audio processing module, the FPGA interface processing circuit reads the digital voice data and the control parameter in the output voice buffer memory, writes the digital voice data into the corresponding D/A channel according to the control parameter, and sends the analog audio generated by the D/A channel to the corresponding audio output channel after passing through level conversion and voice amplification processing. And, the onboard integrated audio processing unit voice input is the reverse process of voice output.
According to a preferred embodiment, the analog audio interface module comprises: the device comprises an input audio amplification circuit, a differential-to-single-ended circuit, an A/D conversion circuit, an FPGA interface processing circuit, a D/A conversion circuit, a single-ended-to-differential circuit, an output audio amplification circuit and a discrete interface circuit; the analog audio signal input into the analog audio interface module is firstly amplified by an audio amplifying circuit, the amplified analog audio signal is subjected to level conversion by a differential/single-ended circuit and then is sent to an A/D chip for digital processing, the generated parallel digital signal is sent to an FPGA interface processing circuit for waiting processing, when the FPGA interface processing circuit detects that the corresponding PTT signal is effective, the FPGA interface processing circuit performs parallel/serial conversion processing on the parallel digital signal, when the FPGA interface processing circuit receives digital voice to be output, the digital voice is subjected to serial/parallel conversion processing, the processed parallel signal is sent to the corresponding D/A chip for analog processing, the analog audio is converted into a differential signal by the single-ended/differential circuit, and the differential signal is amplified by the amplifying circuit and then is output.
According to a preferred embodiment, the digital audio processing module and the FPGA interface processing circuit are in data communication by adopting an interrupt mode based on a LocalBus bus, and after receiving an interrupt signal, the digital audio processing module acquires a voice receiving channel number by inquiring the value of an interrupt processing register connected with a voice receiving channel and calls a corresponding interrupt processing function to realize data receiving; after receiving the interrupt signal, the FPGA interface processing circuit obtains a voice sending channel number by inquiring the value of an interrupt processing register connected with the voice sending channel, and sends the digital voice to a corresponding D/A chip for voice processing.
According to a preferred embodiment, the encryption/decryption module decodes the received encrypted voice data to be decrypted according to the secret communication protocol, the decoded voice data is transmitted back to the digital audio processing module for digital voice processing, the encryption/decryption module encodes the received voice data to be encrypted according to the secret communication protocol, and the encoded encrypted voice data is transmitted back to the digital audio processing module for packaging.
According to a preferred embodiment, the voice denoising is to perform noise filtering processing on the input voice data according to a denoising algorithm; the voice enhancement is to carry out voice enhancement processing on input voice data according to a voice enhancement algorithm; the voice weighting and mixing are to perform weighting/mixing processing on voice data input by each channel according to requirements, and the processed voice is output to a specified audio output channel; the voice automatic gain control is to amplify the input voice data by different times.
According to a preferred embodiment, the tonal warning sounds include a monophonic warning sound, a morse warning sound; the voice warning sound comprises an airplane action instruction prompt sound and an airplane equipment state prompt sound.
According to a preferred embodiment, the analog audio interface module has 2 pilot microphone signal inputs, 2 pilot earpiece signal outputs, 1 ground crew microphone signal input, 1 ground crew earpiece signal output, 4 other analog voice signal inputs, 4 other analog voice signal outputs, 2 pilot PTT signal inputs, 1 ground crew PTT signal input, and 4 other audio PTT signal inputs.
According to a preferred embodiment, the digital audio processing module is further capable of packing digital voice into a protocol packet and transmitting the packed digital voice to other devices through a high-speed bus interface.
According to a preferred embodiment, the CPU processor comprises a large scale integrated circuit device such as a PowerPC, DSP, loongson, and the like.
According to a preferred embodiment, the high speed bus interface includes an ethernet interface, a RapidIO interface, an ARINC664 (AFDX) interface, a GJB289A bus interface, and an ARINC429 bus interface.
The aforementioned main aspects of the invention and their respective further alternatives may be freely combined to form a plurality of aspects, all of which are aspects that may be adopted and claimed by the present invention. The skilled person in the art can understand that there are many combinations, which are all the technical solutions to be protected by the present invention, according to the prior art and the common general knowledge after understanding the scheme of the present invention, and the technical solutions are not exhaustive herein.
The invention has the beneficial effects that:
the invention integrates the functions of analog voice, digital voice, secret communication and the like into the same equipment unit according to the requirement of the integration of integrated avionic equipment, provides at least 7 paths of analog voice input/output and 7 paths of analog voice output and 7 paths of PTT signal input in an analog audio interface module, can expand voice input/output channels according to special requirements, can process the digital voice received by a high-speed bus interface by a digital audio processing module, and can encrypt/decrypt the digital voice by an encryption/decryption module.
The invention can send the voice data processed by the digital audio processing module to the appointed single audio output channel according to the actual requirement, and also can send the voice data to the appointed multiple audio output channels, thereby realizing the reconstruction of the voice channels, greatly increasing the flexibility and the configurability of the airborne comprehensive audio processing unit, and ensuring the real-time performance and the reliability of the receiving by the CPU processor receiving the data transmitted by the analog audio interface module and the encryption/decryption module in an interrupt mode.
The invention can process digital voice by digital audio processing technology, the digital audio processing technology can suppress noise and enhance voice, and can also carry out weighting and mixing processing on multi-channel audio signals according to actual requirements, carry out automatic gain control on audio, and generate tone warning sound and voice warning sound according to actual requirements.
The invention adopts large-scale integrated circuits such as FPGA and CPU processor, the audio processing unit with the same volume can provide more audio input/output channels, and the airborne integrated audio processing unit can further reduce the volume and the weight under specific requirements, thereby meeting the weight reduction requirement of the airplane.
Drawings
Fig. 1 is a schematic diagram of the physical composition of the onboard integrated audio processing unit of the present invention.
Fig. 2 is a block diagram of the analog audio interface module signal/data processing of the present invention.
Fig. 3 is a block diagram of the digital audio processing module and the encryption/decryption module data processing of the present invention.
Fig. 4 is a flow chart of the voice transceiving of the onboard integrated audio processing unit of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that, in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments.
See fig. 1. In a preferred embodiment described below, the on-board integrated audio processing unit includes an analog audio interface module, a digital audio processing module, and an encryption/decryption module.
The analog audio interface module is realized based on an FPGA interface processing circuit and completes analog voice acquisition, discrete signal acquisition and interface matching. The digital audio processing module is realized based on the CPU processor, completes voice noise reduction and voice enhancement of the digital audio signals, performs weighting and mixing processing on the multi-channel audio signals according to actual requirements, performs automatic gain control on audio, generates tone warning sound and voice warning sound according to actual requirements, unpacks/packs voice data and the like. The encryption/decryption module performs an encryption/decryption function of voice data.
The analog audio interface module has 2 pilot microphone signal inputs/2 pilot earphone signal outputs, 1 ground service personnel microphone signal input/1 ground service personnel earphone signal output, 4 other analog voice signal inputs/4 other analog voice signal outputs, 2 pilot PTT signal inputs, 1 ground service personnel PTT signal inputs and 4 other audio PTT signal inputs.
When the onboard integrated audio processing unit outputs voice, the digital audio processing module unpacks the received digital voice according to a protocol, writes processed digital voice data and control parameters into an FIFO of an FPGA through a LocalBus bus and synchronously sends interrupt signals to an FPGA interface processing circuit, after the FPGA interface processing circuit receives the interrupt signals sent by the digital audio processing module, the FPGA interface processing circuit reads the digital voice data and the control parameters in the FIFO, the FPGA interface processing circuit writes the digital voice data into a corresponding D/A channel according to the control parameters, analog audio generated by the D/A channel is sent to a corresponding audio output channel after level conversion and voice amplification processing, and the digital audio processing module can also package the digital voice according to the protocol and send the packaged digital voice to other equipment through a high-speed bus interface. The onboard integrated audio processing unit voice input is the inverse of the voice output.
See fig. 2. A preferred embodiment of an on-board integrated audio processing unit, analog audio input/output and PTT signal processing is described.
When receiving voice, a pair of differential analog audio is connected to an input audio amplifying circuit, the input audio amplifying circuit amplifies the input audio according to the index requirement corresponding to the input audio, the amplified differential audio is processed by a differential-to-single-ended circuit to generate a single-ended analog audio signal, the single-ended analog audio signal is connected to an input port of an A/D conversion circuit, an A/D conversion chip digitizes the input analog audio signal to generate a parallel digital signal with a bit width of 8 bits, the parallel digital signal is input into an FPGA interface processing circuit, a parallel/serial conversion circuit in the FPGA interface processing circuit judges whether a PTT signal corresponding to the current analog audio signal is valid, if the PTT signal corresponding to the current analog audio signal is valid, the parallel/serial conversion circuit of the FPGA interface processing circuit converts the 8-bit parallel digital signal input into a serial digital signal and caches the serial digital signal in an input voice cache region, and the FPGA interface processing circuit sends an interrupt to a digital audio processing module after caching a packet of data, and informs the digital audio processing module to fetch voice data. And if the PTT signal corresponding to the current analog audio signal is invalid, the FPGA interface processing circuit does not process the parallel digital signal.
The discrete interface circuit acquires the state of a PTT signal at any time, the PTT signal is generally in a grounding/suspending state, the PTT signal is ineffective when suspended, the PTT signal is effective when grounded, the PTT signal is ineffective after being processed by the discrete interface circuit, the discrete interface circuit outputs a low level to the FPGA interface processing circuit, the PTT signal is effective, the discrete interface circuit outputs a high level to the FPGA interface processing circuit, and the FPGA interface processing circuit judges whether the PTT signal is effective according to the received level information.
When a voice is sent, after the FPGA interface processing circuit receives an interrupt sent by the digital audio processing module, the FPGA interface processing circuit takes a packet of voice data from the output voice buffer area and sends the packet of voice data to the serial/parallel conversion circuit for processing, 8-bit parallel digital signals generated after processing are sent to the D/A conversion circuit, the 8-bit parallel digital signals are converted by the D/A chip to generate a single-ended analog audio signal, the analog audio signal is converted by the single-ended differential conversion circuit to generate a pair of differential audio signals, the differential audio signals are sent to the output audio amplification circuit for amplification, and the output audio amplification circuit amplifies the differential audio signals according to the index requirement of the audio signals.
See fig. 3. The digital audio processing module analyzes the input digital voice data after receiving the digital voice data sent by the FPGA interface processing circuit or the high-speed bus when receiving voice, and directly sends the digital voice data to the voice processing functional sub-module to perform digital voice processing according to the design requirement after judging that the received digital voice data is not the secret voice data, wherein the digital voice processing comprises the following steps: voice noise reduction processing, voice weighting/mixing processing, voice enhancement processing, voice automatic gain control, and the like. After the digital audio processing module judges that the received digital voice data is the encrypted voice data, the encrypted voice data is sent to the encryption/decryption module for encrypted voice decoding, and the decoded digital voice data is sent to the voice processing functional sub-module of the digital audio processing module again for digital voice processing according to the design requirement.
When the voice is sent, the digital audio processing module judges that the digital voice data to be sent is not the secret voice data, the voice data or the warning sound data form a voice data packet according to the protocol requirement, the digital audio processing module judges that the digital voice data to be sent is the secret voice data, the secret voice data is sent to the encryption/decryption module for secret voice coding, the coded voice data is sent to the digital audio processing module again, the voice data packet is formed according to the protocol requirement, and the voice data packet is sent to the FPGA or the high-speed data bus interface according to the destination.
See fig. 4. After the processor is started, an initialization function is firstly operated, and the working mode of the processor is configured, wherein the working mode comprises the steps of setting working frequency, initializing an IO port and configuring an interrupt register to receive external interrupt. Then, the main loop is entered to detect the reception/transmission state of the voice. When voice data to be transmitted is judged, the digital audio processing module judges whether the voice data to be transmitted is processed or not or whether an alarm sound is generated or not, if the voice data to be transmitted is not processed or the alarm sound is not generated, the digital audio processing module continues to judge whether the voice data to be transmitted is secret voice data or not, if the voice data to be transmitted is secret voice data, the digital audio processing module sends the voice data to the encryption/decryption module for encryption and coding, after coding is completed, the secret voice data is sent to the digital audio processing module again for voice data packaging, after one frame of data packaging is completed, the voice data packet is sent to the high-speed bus interface, if the voice data to be transmitted is not secret voice data, the voice data forms a voice data packet, after one frame of data packaging is completed, the voice data packet is sent to the FPGA output buffer, meanwhile, the digital audio processing module sends an interrupt to the FPGA to notify the FPGA to obtain the voice data packet, the FPGA obtains the voice data packet, and converts the voice data into a single-ended data string and then converts the single-ended audio data string into a differential signal, and outputs a/differential signal after a differential signal D, and amplifies the single-ended signal and outputs the FPGA and a differential signal.
When the main loop detects that data comes, a voice receiving process is entered. Firstly, the digital audio processing module analyzes the received data, the digital audio processing module judges whether the received voice data is secret speech data, if the received voice data is secret speech data, the digital audio processing module sends the voice data to the encryption/decryption module for secret speech decoding, after the decoding is finished, the secret speech data is sent to the digital audio processing module again for digital voice processing, and if the received voice data is not secret speech data, the voice data is directly subjected to digital voice processing.
The input analog audio interface amplifies the input analog audio after being electrified, the differential/single-ended level conversion is carried out, the A/D chip carries out digital processing on the input analog audio signal, the parallel signal after the digital processing is sent to the FPGA interface processing circuit, the FPGA interface processing circuit judges whether the PTT signal corresponding to the voice data is effective or not, and if the PTT signal is ineffective, the waiting is continued. When the PTT signal is detected to be effective, the parallel signal input by the FPGA interface processing circuit is converted into a serial signal and voice data is packaged, when one frame of data is packaged, the voice data packet is sent to the input buffer memory of the FPGA interface processing circuit, and meanwhile, the FPGA interface processing circuit sends an interrupt to the digital audio processing module to inform the digital audio processing module of taking the voice data packet.
The invention integrates the functions of analog voice, digital voice, secret communication and the like into the same equipment unit according to the requirement of the integration of integrated avionic equipment, provides at least 7 paths of analog voice input/output and 7 paths of analog voice output and 7 paths of PTT signal input in an analog audio interface module, can expand voice input/output channels according to special requirements, can process the digital voice received by a high-speed bus interface by a digital audio processing module, and can encrypt/decrypt the digital voice by an encryption/decryption module.
The invention can send the voice data processed by the digital audio processing module to the appointed single audio output channel according to the actual requirement, and also can send the voice data to the appointed multiple audio output channels, thereby realizing the reconstruction of the voice channels, greatly increasing the flexibility and the configurability of the airborne comprehensive audio processing unit, and the CPU receives the data transmitted by the analog audio interface module and the encryption/decryption module in an interruption mode, thereby ensuring the real-time performance and the reliability of the receiving.
The invention can process digital voice by digital audio processing technology, the digital audio processing technology can suppress noise and enhance voice, and can also carry out weighting and mixing processing on multi-channel audio signals according to actual requirements, carry out automatic gain control on audio, and generate tone warning sound and voice warning sound according to actual requirements.
The invention adopts large-scale integrated circuits such as FPGA and CPU processor, the audio processing unit with the same volume can provide more audio input/output channels, and the airborne integrated audio processing unit can further reduce the volume and the weight under specific requirements, thereby meeting the weight reduction requirement of the airplane.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. An airborne integrated audio processing unit, comprising: the device comprises an analog audio interface module, a digital audio processing module and an encryption/decryption module;
the analog audio interface module is realized based on an FPGA interface processing circuit and is configured to finish analog voice acquisition, discrete signal acquisition and interface matching;
the digital audio processing module is realized on the basis of a CPU processor and is configured to finish voice noise reduction and voice enhancement of the digitized audio signals, and comprises the steps of weighting and mixing audio signals on the basis of requirements, performing automatic gain control on audio, generating tone warning sound and voice warning sound on the basis of requirements, and finishing unpacking and packing processing of voice data;
the encryption/decryption module is configured to complete encryption and/or decryption of voice;
when the onboard integrated audio processing unit outputs voice, the digital audio processing module unpacks the received digital voice according to a protocol, writes voice data and control parameters after digital voice processing into an output voice cache of the FPGA interface processing circuit through a bus and synchronously sends an interrupt signal to the FPGA interface processing circuit,
after receiving an interrupt signal sent by the digital audio processing module, the FPGA interface processing circuit reads digital voice data and control parameters in an output voice cache of the FPGA interface processing circuit, writes the digital voice data into a corresponding D/A channel according to the control parameters, and sends analog audio generated by the D/A channel to a corresponding audio output channel after passing through level conversion and voice amplification;
the analog audio interface module includes: the device comprises an input audio amplification circuit, a differential-to-single-ended circuit, an A/D conversion circuit, an FPGA interface processing circuit, a D/A conversion circuit, a single-ended to differential circuit, an output audio amplification circuit and a discrete interface circuit;
the analog audio signal input into the analog audio interface module is firstly amplified by the audio amplifying circuit, the amplified analog audio signal is transmitted to the A/D chip for digital processing after level conversion by the differential/single-ended circuit, the generated parallel digital signal is transmitted to the FPGA interface processing circuit for waiting processing,
when the FPGA interface processing circuit detects that the corresponding PTT signal is effective, the FPGA interface processing circuit performs parallel/serial conversion processing on the parallel digital signal,
when the FPGA interface processing circuit receives digital voice to be output, the digital voice is subjected to serial/parallel conversion processing, the processed parallel signals are sent to a corresponding D/A chip to be subjected to analog processing, analog audio is converted into differential signals through a single-ended/differential circuit, and the differential signals are amplified through an amplifying circuit and then output.
2. The on-board integrated audio processing unit according to claim 1, wherein the digital audio processing module CPU processor and the FPGA interface processing circuit are in data communication by means of interrupt based on a LocalBus bus,
after receiving the interrupt signal, the digital audio processing module obtains a voice receiving channel number by inquiring the value of an interrupt processing register connected with a voice receiving channel and calls a corresponding interrupt processing function to realize data receiving;
after receiving the interrupt signal, the FPGA interface processing circuit obtains the number of the voice sending channel by inquiring the value of an interrupt processing register connected with the voice sending channel and sends the digital voice to a corresponding D/A chip for voice processing.
3. The on-board integrated audio processing unit according to any of claims 1 to 2, wherein the encryption/decryption module decodes the received encrypted voice data to be decrypted according to the secure communication protocol, and the decoded voice data is transmitted back to the digital audio processing module for digital voice processing,
the encryption/decryption module encodes the received voice data to be encrypted according to the secret communication protocol, and the encoded secret voice data is transmitted back to the digital audio processing module for packaging.
4. The on-board integrated audio processing unit of claim 1, wherein the voice denoising is a noise filtering process of the input voice data according to a denoising algorithm; the voice enhancement is to carry out voice enhancement processing on input voice data according to a voice enhancement algorithm;
the voice weighting and mixing are to perform weighting/mixing processing on voice data input by each channel according to requirements, and the processed voice is output to a specified audio output channel;
the voice automatic gain control is to amplify the input voice data by different times.
5. The on-board integrated audio processing unit of claim 1, wherein the tonal warning sounds comprise monophonic warning sounds, morse warning sounds; the voice warning sound comprises an airplane action instruction prompt sound and an airplane equipment state prompt sound.
6. The on-board integrated audio processing unit of claim 1, wherein the analog audio interface module has 2 pilot microphone signal inputs, 2 pilot headphone signal outputs, 1 ground crew microphone signal input, 1 ground crew headphone signal output, 4 other analog voice signal inputs, 4 other analog voice signal outputs, and 2 pilot PTT signal inputs, 1 ground crew PTT signal input, and 4 other audio PTT signal inputs.
7. The on-board integrated audio processing unit of claim 1, wherein the digital audio processing module is further capable of packetizing digital voice to a protocol for transmission to other devices via the high speed bus interface.
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| US9398620B1 (en) * | 2009-12-09 | 2016-07-19 | John James Lazzeroni | Simultaneous voice and audio traffic between two devices on a wireless personal-area network |
| CN107124220A (en) * | 2017-06-30 | 2017-09-01 | 广东电网有限责任公司电力科学研究院 | A kind of unmanned helicopter-mounted satellite communication terminal for electric inspection process |
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| CN105539867B (en) * | 2015-12-10 | 2018-09-21 | 中国航空工业集团公司西安航空计算技术研究所 | Based on the general-purpose aircraft airborne electronic equipment system that platform is uniformly processed |
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| US9398620B1 (en) * | 2009-12-09 | 2016-07-19 | John James Lazzeroni | Simultaneous voice and audio traffic between two devices on a wireless personal-area network |
| CN107124220A (en) * | 2017-06-30 | 2017-09-01 | 广东电网有限责任公司电力科学研究院 | A kind of unmanned helicopter-mounted satellite communication terminal for electric inspection process |
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