CN111933163A - On-orbit voice processing system - Google Patents
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- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
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Abstract
The invention discloses an on-orbit voice processing system.A digital audio mixing processing module is respectively in signal connection with a voice processing module and a network communication processing module, and is used for carrying out real-time digital audio mixing on digital voice information of the voice processing module and the network communication processing module and feeding back a voice signal after the digital audio mixing; the voice processing module at least comprises a world link voice processing submodule and a head-mounted voice processing submodule and is used for carrying out bidirectional communication with the ground, the head of an astronaut and the like; and the network processing module is used for carrying out terminal management and network voice data processing and transmission on each network terminal of the aircraft. The invention has a plurality of coding and decoding modes to adapt to the bandwidth requirements of different link channels; carrying out real-time digital sound mixing on multilink voice information, and carrying out real-time control and real-time monitoring on audio parameters of each channel through a 1553B bus; the management and maintenance between the network voice terminal and the network voice terminal are realized, and the operations of registration authentication, maintenance updating, authorization, logout and the like of the network voice terminal are realized.
Description
Technical Field
The invention belongs to the field of aerospace communication, and particularly relates to an on-orbit voice processing system.
Background
Aerospace communication refers to radio communication that is targeted at a space vehicle or celestial body. Including communication between spacecraft (also known as "spacecraft" or "space vehicle"), communication between earth stations and spacecraft, and communication between earth stations on the ground by means of spacecraft retransmission or reflection. The space navigation communication system is a system formed by combining various communication forms and is used for completing complex tasks of tracking and positioning, remote measuring and remote controlling, communication, television and the like. The frequency bands used are ultra-long to millimeter waves and laser. The requirements on the equipment for this communication are also extremely high. The device is widely applied to occasions such as satellites, manned spacecrafts, space stations, space planes, various planet and interstellar detectors, various space navigation measurement and control communication networks and the like, and can complete tasks such as communication, navigation geodesic positioning, reconnaissance, meteorological observation, earth resource detection and the like.
In the voice communication service of the early manned space vehicle, the number of communication links is small, the voice bandwidth is single, and the voice communication service is only limited to the space-ground voice communication service of a single vehicle and can only meet the space-ground basic voice communication requirement.
With the increase of communication bandwidth of a space flight vehicle, the increase of communication links, the development of space Ethernet and the actual use requirements of multi-vehicle combination and astronaut on-orbit home experience, the existing voice communication has functional limitations and has the defect that a plurality of voice communication lines are difficult to coordinate, so that an on-orbit voice processing system is needed to realize the centralized processing function of the on-orbit vehicle combined voice communication, can adapt to different bandwidth channels to provide voice coding and decoding modes with different compression ratios, and realize audio service services such as communication and management of voice terminals in the vehicle combination based on space station Ethernet.
Disclosure of Invention
The technical purpose of the invention is to provide an on-orbit speech processing system, which comprises: the voice processing device comprises a digital audio mixing processing module, a voice processing module and a network communication processing module;
the digital audio mixing processing module is respectively in signal connection with the voice processing module and the network communication processing module and is used for carrying out real-time digital audio mixing on digital voice information generated by the voice processing module and the network communication processing module and feeding back a voice signal after the digital audio mixing so as to realize voice communication;
the voice processing module at least comprises a world link voice processing submodule and a head-wearing voice processing submodule which are used for carrying out bidirectional voice communication with the ground and the head of an astronaut, wherein voice coding and decoding under different link voice bandwidth conditions are carried out on digital voice information received by the voice processing module based on enhanced multi-band excitation compression coding and decoding AMBE or advanced audio coding and decoding compression coding and decoding ACC or voice pulse code modulation PCM;
the network communication processing module is in signal connection with the digital sound mixing processing module and is used for sending the data of the network terminal subjected to digital sound mixing to a communication network; and inputting the data signal of the network terminal after the digital sound mixing transmitted by the communication network into the heaven-earth link voice processing submodule for voice coding and decoding.
The compressed data code rate of the enhanced multi-band excitation compression coding and decoding AMBE is 2 kbps-8 kbps, the compressed data code rate of the advanced audio coding and decoding compression coding and decoding ACC is up to 128kbps, the audio sampling frequency of the voice pulse coding and decoding modulation coding and decoding PCM is 32kHz, and the quantization digit is 16 bits.
Further preferably, the voice processing module further comprises an extra-cabin voice processing submodule and other aircraft voice processing submodules;
the space-ground link voice processing submodule is used for demodulating the DPSK modulation signal input from the outside, completing multilink AMBE coding and decoding and AAC coding and decoding and realizing voice communication services between space-ground links under different link voice bandwidth conditions;
the head-wearing voice processing sub-module is used for carrying out bidirectional voice communication with the astronaut head-wearing equipment;
the extravehicular voice processing submodule is used for carrying out bidirectional voice communication of digital voice signals with extravehicular communication equipment;
and the voice processing submodule of the other aircraft is used for carrying out two-way voice communication with the other aircraft.
The network communication processing module comprises a network data processing submodule and a network terminal management submodule;
the network data processing submodule is used for realizing protocol processing of voice data real-time transmission and data processing of network voice signals of an external network voice terminal;
the network terminal management submodule is used for realizing the functions of controlling, managing and maintaining the access state of an external network voice terminal.
Further preferably, the system further comprises an encryption and decryption module, wherein the encryption and decryption module is in signal connection with the heaven-earth link voice processing submodule and is used for carrying out data encryption and decryption processing on the digital voice signal in the heaven-earth link voice processing submodule.
Further preferably, the system further comprises a power supply module, wherein the power supply module is used for converting an external power supply into an internal power supply required by the on-rail voice processing system.
Further preferably, the system also comprises a telemetering and remote control module connected with an external signal through a bus, and the telemetering and remote control module is used for receiving and executing a remote control command sent from the outside and monitoring and feeding back various parameters of the on-orbit speech processing system.
Further preferably, the system further comprises a clock module, wherein the clock module is used for providing an internal clock and absolute time for the on-orbit speech processing system.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
1) the invention sets a voice processing module, covers the communication requirements of different voice signals under the requirements of various bandwidth channels, has various coding and decoding modes and different coding and decoding rates, and simultaneously processes various voice signals;
2) the digital audio mixing processing module is arranged, real-time digital audio mixing can be carried out on multilink voice information, and real-time control and real-time monitoring can be carried out on audio parameters of all channels through a 1553B bus;
3) the invention is provided with the network communication processing module, realizes the management and maintenance with the network voice terminal, and realizes the operations of registration authentication, maintenance updating, authorization, logout and the like of the network voice terminal.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
Fig. 1 is a schematic structural diagram of an on-track speech processing system according to the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
An on-track speech processing system according to the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims.
Referring to fig. 1, the present embodiment provides an on-orbit speech processing system, including: the voice processing device comprises a digital audio mixing processing module, a voice processing module and a network communication processing module;
the digital audio mixing processing module is respectively in signal connection with the voice processing module and the network communication processing module and is used for carrying out real-time digital audio mixing on digital voice information generated by the voice processing module and the network communication processing module and feeding back a voice signal after the digital audio mixing so as to realize voice communication;
the voice processing module at least comprises a world link voice processing submodule, a head-mounted voice processing submodule and the like, and is used for carrying out bidirectional voice communication with the ground, the outside of an aircraft cabin, the head of an astronaut and the like, wherein voice coding and decoding under different link voice bandwidth conditions are carried out on digital voice information received by the voice processing module based on enhanced multi-band excitation compression coding and decoding AMBE or advanced audio coding and decoding compression coding and decoding ACC or voice pulse code modulation PCM;
the network communication processing module is connected with the digital sound mixing processing module and used for carrying out digital sound mixing on network terminal data and sending voice data after sound mixing to a communication network; and connecting the voice signal of the world link transmitted by the communication network to the voice processing submodule of the world link to carry out voice coding and decoding.
The present embodiment will now be described in detail:
referring to fig. 1, in the present implementation, the voice processing module includes a space-to-ground link voice processing sub-module, a head-mounted voice processing sub-module, an off-cabin voice processing sub-module, and other aircraft voice processing sub-modules;
the heaven and earth link voice processing sub-module can complete enhanced multi-band excitation compression coding and decoding AMBE with three coding and decoding rates of 2kbps, 4kbps and 8kbps, can also complete advanced audio coding and decoding compression coding and decoding ACC with a coding and decoding rate of 128kbps, can also complete multiplexing connection of each link data, and finally can complete demodulation of input DPSK modulation signals, wherein the demodulation steps comprise processes of amplitude limiting protection, band-pass filtering, carrier extraction phase locking, signal shaping, code synchronization, frame synchronization and the like.
The head-wearing voice processing sub-module is used for carrying out bidirectional voice communication with the astronaut head-wearing equipment and comprises a signal conditioning circuit and an analog-digital and digital-analog conversion circuit. Specifically, the signal conditioning circuit uses an operational amplifier circuit capable of driving an infinite capacitive load to perform signal conditioning on the input and output analog audio signals. Specifically, the analog-to-digital and digital-to-analog conversion circuit adopts an AD/DA converter with 16-bit precision and 32KHz sampling rate.
The extravehicular voice processing submodule is used for performing bidirectional voice communication of digital voice signals with extravehicular communication equipment to realize the function of voice conversation with extravehicular astronauts, and comprises a signal conditioning circuit and an analog-digital and digital-analog conversion circuit. Specifically, the signal conditioning circuit uses an operational amplifier circuit capable of driving an infinite capacitive load to perform signal conditioning on an input and output analog audio signal. Specifically, the analog-to-digital and digital-to-analog conversion circuit adopts an AD/DA converter with 16-bit precision and 32KHz sampling rate.
And the voice processing sub-module of other aircrafts is used for carrying out bidirectional voice communication of digital voice signals with other aircrafts, and realizes enhanced multi-band excitation (AMBE) compression coding and decoding with other aircrafts.
The network data processing submodule is connected with a network voice terminal through an internal communication network of the spacecraft, and the communication network has network data processing functions of a network interface, link layer protocol processing, a network protocol stack and the like, wherein an application layer of the communication network adopts an RTP (real-time transport protocol) protocol for transmission, the protocol conforms to RFC3550 and RFC3551 standards, and RTP load is AAC audio coded data conforming to ISO/IEC 13818-7 standard; the transmission layer of the communication network adopts a UDP protocol, and conforms to the RFC 768 standard; the network layer of the communication network adopts IP protocol transmission and conforms to the RFC 791 standard; the data link layer and the physical layer of the communication network conform to the 100BASE-TX standard of the IEEE 802.3u specification.
The network terminal management submodule is used for controlling the network data processing submodule so as to realize maintenance communication between the network data processing submodule and the network voice terminal, control registration, maintenance and logout of the network voice terminal, inquire the state of the on-orbit voice processing system through the network voice terminal and control the function of accessing the network voice terminal to a call.
The digital sound mixing processing module realizes a multi-channel audio serial interface by using a DSP-based chip, and dynamically controls audio parameters such as volume, access or not of each link according to an audio parameter instruction provided by the telemetering remote control module, so that real-time digital sound mixing is realized, and a voice signal after the digital sound mixing is fed back to realize voice communication.
Referring to fig. 1, in this embodiment, preferably, the apparatus further includes an encryption/decryption module, the encryption/decryption module is in signal connection with the world link voice processing submodule, the encryption/decryption module is configured to encrypt/decrypt the digital voice signal in the world link voice processing submodule, a key injection interface is reserved on the encryption/decryption module, and maintenance and replacement of the track key data are implemented through a 1553B bus.
Referring to FIG. 1, a power module is preferably included for converting an external power source to an internal power source required by the on-rail speech processing system.
In this embodiment, the power supply module supplies power to other modules in this embodiment, converts a primary power input from outside of the device into a secondary power required by the system, and outputs the secondary power required by each module with stable and low ripple through the anti-surge starting circuit, the EMI filter, and the DC-DC converter. In order to increase the redundancy reliability of the system of the embodiment, the external power supply provides two sets of power supplies, and the power supply module electrically isolates the two sets of power supplies and can realize the conditions of independent power supply and common power supply. The power module is arranged at the bottom layer of the on-orbit voice processing system, the influence of space irradiation on the power module is reduced, the system adopts a metal shell, the lap resistance is less than 10m omega, and the ground connection with the whole aircraft is good.
Referring to fig. 1, it preferably further includes a telemetry and remote control module for receiving and executing externally transmitted remote control commands, and monitoring and feeding back various parameters of the on-orbit speech processing system.
In this embodiment, the telemetry and remote control module is in signal connection with each module in this embodiment, and is used to transmit telemetry parameters of each module to the outside, such as a control panel of an aircraft, through a 1553B bus; in addition, the control instruction information can be input into the telemetering remote control module through a 1553B bus, so that the operation parameters of each module in the embodiment, including audio parameters such as volume of each link, access or not, and the like, can be adjusted. The telemetering remote control module distinguishes whether the data type is telemetering information or instruction information by distinguishing different remote terminal subaddresses based on a 1553B bus. Specifically, a "remote command reset" measure is adopted for a processor and a logic circuit of each module in the embodiment, and when a spatial single event state is turned over, software and hardware can be automatically reset. Furthermore, the logic circuit inside the embodiment is implemented by an FPGA, and for an SRAM type FPGA, a read-back reconfiguration circuit is configured, and once it is detected that a single event upset occurs in the FPGA, configuration information is read from a PROM memory and reloaded.
Preferably, the system further comprises a clock module, wherein the clock module is used for providing an internal clock and absolute time for the on-orbit voice processing system. In this embodiment, the clock module is in signal connection with other modules in this embodiment and provides a clock signal, and the clock module includes an internal clock circuit, an external clock frequency multiplier circuit, and an internal/external clock switching circuit. Specifically, the internal clock circuit is composed of crystal oscillators of various specifications; the external clock frequency multiplication circuit is a phase-locked loop circuit and provides an external clock phase-locked frequency multiplication function; the internal and external clock switching circuit realizes the functions of external clock detection and automatic internal and external working clock optimization, and performs autonomous switching on the working states of the external clock and the internal clock. When the external clock is valid, the clock signal in this embodiment is provided by the external clock frequency multiplier circuit; when the external clock is invalid, the clock signal in this embodiment is provided by the internal clock circuit; the clock module can also carry out information timing according to the network and update the current absolute time.
Preferably, the embodiment further comprises components with radiation-resistant grades, and radiation-resistant measures are taken for components without radiation-resistant indexes. Further, the large heat generating device in this embodiment is directly mounted on the bottom chassis, providing a good heat dissipation environment. In addition, most devices on the printed board have low heating power, and the thermal design requirements of products can be met by utilizing a heat conduction mode for heat dissipation.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.
Claims (8)
1. An on-orbit speech processing system, comprising: the voice processing device comprises a digital audio mixing processing module, a voice processing module and a network communication processing module;
the digital audio mixing processing module is respectively in signal connection with the voice processing module and the network communication processing module, and is used for performing real-time digital audio mixing on digital voice information generated by the voice processing module and the network communication processing module and feeding back a voice signal after the digital audio mixing so as to realize voice communication;
the voice processing module at least comprises a world link voice processing submodule and a head-wearing voice processing submodule which are used for carrying out bidirectional voice communication with the ground and the head of an astronaut, wherein voice coding and decoding under different link voice bandwidth conditions are carried out on digital voice information received by the voice processing module based on enhanced multi-band excitation compression coding and decoding AMBE or advanced audio coding and decoding compression coding and decoding ACC or voice pulse code modulation PCM;
the network communication processing module is in signal connection with the digital sound mixing processing module and is used for sending the data of the network terminal subjected to digital sound mixing to a communication network; and inputting the data signal of the network terminal after the digital sound mixing transmitted by the communication network into the heaven and earth link voice processing submodule for voice coding and decoding.
2. The on-track speech processing system according to claim 1, wherein the compressed data coding rate of the enhanced multi-band excitation compression codec AMBE is 2kbps to 8kbps, the compressed data coding rate of the advanced audio codec compression codec ACC is up to 128kbps, the audio sampling frequency of the PCM is 32kHz, and the quantization bit number is 16 bits.
3. The on-orbit speech processing system of claim 1, wherein the speech processing module further comprises an off-board speech processing sub-module, and other aircraft speech processing sub-modules;
the space-ground link voice processing submodule is used for demodulating a DPSK modulation signal input from the outside, completing multilink AMBE coding and decoding and AAC coding and decoding, and realizing voice communication services between space-ground links under different link voice bandwidth conditions;
the head-wearing voice processing sub-module is used for carrying out bidirectional voice communication with the astronaut head-wearing equipment;
the extravehicular voice processing submodule is used for carrying out bidirectional voice communication of digital voice signals with extravehicular communication equipment;
and the voice processing submodule of the other aircraft is used for carrying out two-way voice communication with the other aircraft.
4. The on-orbit speech processing system of claim 1, wherein the network communication processing module comprises a network data processing sub-module, a network terminal management sub-module;
the network data processing submodule is used for realizing protocol processing of voice data real-time transmission and data processing of network voice signals of an external network voice terminal;
the network terminal management submodule is used for realizing the functions of controlling, managing and maintaining the access state of an external network voice terminal.
5. The on-orbit speech processing system of claim 1, further comprising an encryption/decryption module in signal connection with the world link speech processing sub-module for performing data encryption/decryption processing on the digital speech signal in the world link speech processing sub-module.
6. The on-rail speech processing system of claim 1 further comprising a power module for converting an external power source to an internal power source required by the on-rail speech processing system.
7. The on-orbit speech processing system of claim 1, further comprising a telemetry and remote control module connected to external signals via a bus for receiving and executing externally transmitted remote control commands and monitoring and feeding back various parameters of the on-orbit speech processing system.
8. The on-orbit speech processing system of claim 1, further comprising a clock module to provide an internal clock and absolute time for the on-orbit speech processing system.
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