CN207732909U - A kind of multi-functional asynchronous transport system of AES3/EBU digital audio - Google Patents
A kind of multi-functional asynchronous transport system of AES3/EBU digital audio Download PDFInfo
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- CN207732909U CN207732909U CN201721910794.0U CN201721910794U CN207732909U CN 207732909 U CN207732909 U CN 207732909U CN 201721910794 U CN201721910794 U CN 201721910794U CN 207732909 U CN207732909 U CN 207732909U
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Abstract
The utility model discloses a kind of multi-functional asynchronous transport system of AES3/EBU digital audio, transmitting terminal is merged into highspeed serial data stream all the way after the technical finesses such as data recovery, decoding, rate identification, positive justification, time division multiplexing, scrambling to the multi-path digital audio signal for participating in multiple connection and sends；The digital signal for participating in multiple connection, from the digital audio and video signals for being sampled and being encoded into analog audio signal；Or the digital signal directly inputted from outside.Receiving terminal taps the high speed serialization signal bit stream of transmitting terminal synthesis, to restoring for every road audio signal, the signal after recovery maintains original sample rate using the technologies such as data recovery, descrambling, demultiplexing, code quick-recovery, clock digital smoothness.The multi-functional asynchronous transport system of AES3/EBU digital audio provided by the utility model, which realizes, connects unknown, asynchronous, multi tate AES3/EBU digital audio and video signals subdivisions.
Description
Technical field
The utility model is related to Digital Audio Transmission field more particularly to a kind of multi-channel A ES3/EBU digital audio and video signals are different
Step subdivision connects Transmission system.
Background technology
With popularizing for broadcasting digitalization, the manufacturing systems such as more and more studios, work station, mobile control room are all adopted
Video/audio signal is transmitted with digital interface.Digital audio interface has many standards, and common interfaces standard mainly has at present
AES3/EBU interfaces, S/PDIF interfaces, MADI interfaces etc..S/PDIF is mainly used as civilian digital audio format standard；MADI connects
Mouth is formulated based on double channel A ES3/EBU interfaces；It is mainly connect using AES3/EBU in pro digital audio area
Mouth standard, it is Audio Engineering Society/European Broadcast Union（Audio engineer association/
European Broadcasting Union）Abbreviation, become the more popular standard of pro digital audio, a large amount of products for civilian use and professional audio
Digital device such as CD player, DAT, MD machine, digital sound console, Digital Audio Workstation etc. all supports AES3/EBU interface standards.
Existing AES3/EBU digital interface equipments have a single function, and transmission rate is single, fixed, does not adapt to digital broadcasting
The demand of television equipment multi -rate transmission.
Invention content
The utility model provides a kind of suitable for performing in a radio or TV programme for deficiency existing for existing AES3/EBU digital interface equipments
The multi-functional asynchronous transport system of AES3/EBU digital audio of the manufacturing systems such as room, work station, mobile control room.
It is asynchronous to realize that the technical solution of the present utility model purpose is to provide a kind of multi-functional AES3/EBU digital audio
Transport system, including send end device and receiving end device；The transmission end device includes：Transmitting terminal microprocessor, extremely
Few 2 transmitting terminal AES3/EBU audio output interfaces, at least two transmitting terminal analog audio interface, at least two ADC module, at least
2 transmitting terminals, one toggle switch, two toggle switch of at least two, transmitting terminal 24.576MHz crystal oscillators, transmitting terminal
11.2896MHz crystal oscillators, transmitting terminal LVDS interface and at least two transmitting terminal AES3/EBU audio input interfaces；The transmitting terminal
AES3/EBU audio output interfaces, ADC module, one toggle switch of transmitting terminal, two toggle switch, transmitting terminal 24.576MHz
Crystal oscillator, transmitting terminal 11.2896MHz crystal oscillators, transmitting terminal LVDS interface, transmitting terminal AES3/EBU audio input interfaces respectively with transmission
Microprocessor is held to be connected, transmitting terminal analog audio interface is connected with ADC module；
The receiving end device includes：Receiving end microprocessor, receiving terminal LVDS interface, receiving terminal 24.576MHz are brilliant
It shakes, receiving terminal 11.2896MHz crystal oscillators, at least two receiving terminal AES3/EBU audio output interfaces, at least two receiving terminal AES3/
EBU audio input interfaces, one toggle switch of at least two, at least two receiving terminal DAC module, at least two receiving terminal analog audio
Frequency interface；The receiving terminal LVDS interface, receiving terminal 24.576MHz crystal oscillators, receiving terminal 11.2896MHz crystal oscillators, receiving terminal
AES3/EBU audio output interfaces, receiving terminal AES3/EBU audio input interfaces, a toggle switch respectively with the micro- place of receiving terminal
It manages device to be connected, receiving terminal analog audio interface is connected with receiving terminal DAC module；The transmitting terminal LVDS interface and receiving terminal LVDS
It is realized and is transmitted by wired or wireless communication module between interface.
In technical solutions of the utility model, transmitting terminal microprocessor includes AES3/EBU coding modules, digital signal multiplexing
Select S1 modules, transmitting terminal AES3/EBU decoder modules, rate detection module, transmitting terminal ADC control modules, data simultaneous module
One, time division multiplexing selection S2 modules, data simultaneous module two, positive justification module, time division multiplexing module, scrambling module.
Receiving end microprocessor include data local recovery module, system clock generation module, descrambling module, solution time-division it is multiple
With module, Clock Extraction module, code speed detection module, code quick-recovery module, signal bit stream selection S1 modules, signal behavior
S2 modules, receiving terminal AES3/EBU decoder modules, receiving terminal DAC control modules.
The a variety of rate AES3/EBU audio signals of transmitting terminal device-adaptive provided by the utility model, participate in the every of multiple connection
Road AES3/EBU audio signals rate can be any one in 4.096,5.6448,6.144,12.288 or 24.576Mbps
Kind, system automatic identification.
The transmission end device of offer supports analog audio signal and AES3/EBU digital audio and video signals mixing multiple connections.Participate in
The AES3/EBU digital signals source of multiple connection can be the external AES3/EBU signals directly provided, can also be by AES3/
The analog audio signal of EBU codings.Multiplexed signal source can be selected by corresponding toggle switch.
Sending end device has multi-channel analog audio input port, completes AES3/EBU after being sampled to every road analogue audio frequency and compiles
Code.The sample rate to analogue audio frequency is wherein controlled by toggle switch, sample rate can be 32,44.1,48,96 or 192kHz.
The adaptive different sample rates of AES3/EBU encoders, output speed corresponds to 4.096,5.6448,6.144,12.288 after coding
Or 24.576Mbps.
Receiving end device can restore the every road AES3/EBU signals for participating in multiple connection, and sample rate remains unchanged.
Receiving end device can be decoded every road AES3/EBU signals respectively, and it is defeated to be then converted into analog audio signal
Go out.May be from sending per road decoded AES3/EBU signal sources the AES3/EBU audio signals that multiple connection is participated in end device or
AES3/EBU audio signals in receiving end device AES3/EBU audio input interfaces.
The multi-functional asynchronous transport system of AES3/EBU digital audio provided by the utility model, in sending end device,
The AES3/EBU signals source of multiple connection is participated in per road by one toggle switch selection of transmitting terminal, is come from per road AES3/EBU signal sources
Analog audio interface comes from AES3/EBU audio input interfaces.The effect of each module and function are in transmitting terminal microprocessor：
Two toggle switch of transmitting terminal microprocessor control ADC module by the transmitting terminal ADC control modules of transmitting terminal microprocessor
To the sample rate of analog audio signal；AES3/EBU coding modules read the digital signal of ADC module output, are adopted according to different
Sample rate is encoded into the digital signal of the coding output AES3/EBU formats of corresponding code check；Digital signal multiplexing selection S1 modules are used for
Select to wait to participate in the source of the AES3/EBU digital signals of multiplexing, AES3/EBU signal sources from AES3/EBU coding modules or
AES3/EBU audio input interfaces；Rate detection module is measured by transmitting terminal AES3/EBU decoder modules and participates in multiplexing in real time
The sample rate of AES3/EBU audio signals, it is therefore an objective to identify the AES3/EBU signal distinguishings of different code checks；Data synchronize
Module one and data simultaneous module two drive clock different, and two modules simultaneously carry out AES3/EBU signals with driving clock same
Step, Exact recovery go out AES3/EBU signals；Immediately positive justification module after data simultaneous module two, by the AES3/EBU of recovery
Signal code stream rate is adjusted；The module that is time-multiplexed selects the selection of S2 modules to participate in time division multiplexing multiplexing letter by time division multiplexing
Number source, then by multiple signals synthesis export all the way.
In receiving end device, opened by one dial-up of receiving terminal per the signal source of road receiving terminal analog audio interface output
Selection is closed, analog audio signal source connects from signal bit stream selection S1 modules or from receiving terminal mould AES3/EBU audio output
Mouthful.The effect of each module and function are in receiving end microprocessor：Data local recovery module restores skill using over-sampling data
Art is correctly restored the data flow in receiving terminal LVDS interface in receiving end microprocessor；Code speed detection module is logical
Oversampling clock extraction module obtains data flow bit clock, and then specific bit position judges in detection data stream under timeticks in place
Whether data flow passes through positive justification；Signal bit stream selection S1 modules are for selecting correct AES3/EBU signal bit streams defeated
Go out：It is exported again after first carrying out code quick-recovery to it if AES3/EBU signal bit streams have passed through positive justification, otherwise directly
Export AES3/EBU signal bit streams；Signal behavior S2 modules select receiving terminal AES3/EBU audio inputs by a toggle switch
The AES3/EBU signals of AES3/EBU signals or the output of S1 modules in interface, which are sent in AES3/EBU decoder modules, to be decoded；
Receiving terminal DAC control modules control and receive the digital-to-analogue of end DAC module by the audio sample rate that AES3/EBU decoder modules export
Conversion frequency.
Due to the application of the above technical scheme, the utility model compared with prior art the advantages of be：The utility model
The multi-functional asynchronous transport system of AES3/EBU digital audio provided is realized to unknown, asynchronous, multi tate AES3/EBU
The subdivision of digital audio and video signals connects, and receiving end device can restore digital audio and video signals with crude sampling rate；The system
AES3/EBU interfaces not only adaptive a variety of transmission rates, also support the AES3/EBU encoding functions and AES3/EBU of analog signal
The decoding function of signal.By that can increase and delete multiplexed signal quantity to function module multiplexing, it is easy to extend, has extensive
Adaptability.The multi-functional asynchronous multiplexing system is transmitted suitable for asynchronous AES3/EBU digital audio and video signals, can be applied to drill
Broadcast the manufacturing systems such as room, work station, mobile control room.
Description of the drawings
Fig. 1 is the transmission for the multi-functional asynchronous transport system of AES3/EBU digital audio that the utility model embodiment provides
The structural schematic diagram of end device；
Fig. 2 is the reception for the multi-functional asynchronous transport system of AES3/EBU digital audio that the utility model embodiment provides
The structural schematic diagram of end device.
Fig. 3 is the structure for the multi-functional asynchronous transport system of AES3/EBU digital audio that the utility model embodiment provides
Schematic block diagram.
In Fig. 1：1, transmitting terminal microprocessor；101, AES3/EBU coding modules；102, digital signal multiplexing selection S1 moulds
Block；103, AES3/EBU decoder modules；104, rate detection module；105, ADC control modules；106, data simultaneous module one；
107, time division multiplexing selection S2 modules；108, data simultaneous module two；109, positive justification module；110, be time-multiplexed mould
Block；111, scrambling module；2, transmitting terminal AES3/EBU audio output interfaces；3, transmitting terminal analog audio interface；4, ADC module；
5, one toggle switch of transmitting terminal；6, two toggle switch；7, transmitting terminal 24.576MHz crystal oscillators；8, transmitting terminal 11.2896MHz
Crystal oscillator；9, transmitting terminal LVDS interface；10, transmitting terminal AES3/EBU audio input interfaces.
In attached drawing 2：11, receiving end microprocessor；1101, data local recovery module；1102, clock generation module；
1103, descrambling module；1104, solution time division multiplexing module；1105, Clock Extraction module；1106, code speed detection module；1107、
Code quick-recovery module；1108, signal bit stream selects S1 modules；1109, signal behavior S2 modules；1110, AES3/EBU is decoded
Module；1111, DAC control modules；12, receiving terminal LVDS interface；13, receiving terminal 24.576MHz crystal oscillators；14, receiving terminal
11.2896MHz crystal oscillators；15, receiving terminal AES3/EBU audio output interfaces；16, receiving terminal AES3/EBU audio input interfaces；
17, one toggle switch of receiving terminal；18, DAC module；19, receiving terminal analog audio interface.
Specific implementation mode
Technical solutions of the utility model are further described with reference to the accompanying drawings and embodiments.
Embodiment 1：
The present embodiment provides a kind of multi-functional asynchronous transport systems of AES3/EBU digital audio, and structure is referring to attached drawing 1
Shown in~3, it includes sending end device and receiving end device.
Referring to attached drawing 1, sending end device includes：Transmitting terminal microprocessor 1, at least two transmitting terminal AES3/EBU audios are defeated
Outgoing interface 2, at least two transmitting terminal analog audio interface 3, at least two transmitting terminal ADC module 4, at least two transmitting terminal one are dialled
Code switch 5, transmitting terminal 24.576MHz crystal oscillators 7, transmitting terminal 11.2896MHz crystal oscillators 8, is sent two toggle switch 6 of at least two
Hold LVDS interface 9 and at least two transmitting terminal AES3/EBU audio input interfaces 10.Concrete structure is：AES3/EBU audio output
Interface 2, the toggle switch 5, two of ADC module 4, one toggle switch 6,24.576MHz crystal oscillators 7,11.2896MHz crystal oscillators 8,
LVDS interface 9, AES3/EBU audio input interfaces 10 are all connected with microprocessor 1 respectively, analog audio interface 3 and ADC module 4
It is connected.
In the present embodiment, microprocessor 1 further comprises AES3/EBU coding modules 101, digital signal multiplexing selection
S1 modules 102, AES3/EBU decoder modules 103, rate detection module 104, ADC control modules 105, data simultaneous module one
106, time division multiplexing selection S2 modules 107, data simultaneous module 2 108, positive justification module 109, time division multiplexing module
110, scrambling module 111.
The function of each module is as follows：
The digital signal that AES3/EBU coding modules 101 are exported by reading the sampling of ADC module 4, according to different samplings
The digital signal of the AES3/EBU formats of the pairs of code rate of rate autocoding.
Two toggle switch 6 control sample rate of the ADC module 4 to analog audio signal by ADC control modules 105.
S1 modules 102 are used to select to wait to participate in the source of the AES3/EBU digital signals of multiplexing, and AES3/EBU signal sources are come
From AES3/EBU coding modules 101 or AES3/EBU audio input interfaces 10.
Rate detection module 104 measures the AES3/EBU audios for participating in multiplexing by AES3/EBU decoder modules 103 in real time
The sample rate of signal, it is therefore an objective to identify the AES3/EBU signal distinguishings of different code checks.
Data simultaneous module 1 and data simultaneous module 2 108 drive clock different, and two modules are simultaneously by AES3/
EBU signals are synchronized with driving clock, Exact recovery AES3/EBU signals.Immediately code is fast after data simultaneous module 2 108
Module 109 is adjusted, the AES3/EBU signal code stream rates of recovery are adjusted.
The module 110 that is time-multiplexed selects to participate in the source of time division multiplexing multiplexed signals by S2 modules 107, then by multichannel
Signal synthesis exports all the way.
Referring to attached drawing 2, receiving end device includes：Receiving end microprocessor 11, receiving terminal LVDS interface 12, receiving terminal
24.576MHz crystal oscillators 13, receiving terminal 11.2896MHz crystal oscillators 14, at least two receiving terminal AES3/EBU audio output interfaces 15, extremely
Few 2 receiving terminal AES3/EBU audio input interfaces 16, one toggle switch 17 of at least two receiving terminal, at least two receiving terminal
DAC module 18, at least two receiving terminal analog audio interface 19.Concrete structure is：LVDS interface 12,24.576MHz crystal oscillators 13,
16,11.2896MHz crystal oscillators 14, AES3/EBU audio output interfaces 15, AES3/EBU audio input interfaces toggle switch 17
All it is connected respectively with microprocessor 11, analog audio interface 19 is connected with DAC module 18.
In the present embodiment, microprocessor 11 further comprises that data local recovery module 1101, system clock generate mould
Block 1102, descrambling module 1103, solution time division multiplexing module 1104, Clock Extraction module 1105, code speed detection module 1106, just
Code quick-recovery module 1107, signal bit stream selection S1 modules 1108, signal behavior S2 modules 1109, AES3/EBU decoder modules
1110, DAC control modules 1111.The function of each module is as follows：
Data local recovery module 1101 is using over-sampling data recovery technique by the data flow in LVDS interface 12 micro-
Correctly restored in processor 11.
After code speed detection module 1106 shifts to an earlier date the acquisition data flow bit clock of module 1105 by clock, then in bit clock
Under beat in detection data stream specific bit position come judge data flow whether pass through positive justification.
S1 modules 1108 are used for that correct AES3/EBU signal bit streams is selected to export：If AES3/EBU signal bit streams have passed through
Positive justification exports again after then first carrying out code quick-recovery to it, otherwise directly exports AES3/EBU signal bit streams.
S2 modules 1109 select the AES3/EBU in AES3/EBU audio input interfaces 16 by a toggle switch 17
The AES3/EBU signals that signal or S1 modules 1108 export, which are sent in AES3/EBU decoder modules 1110, to be decoded.
DAC control modules 1111 control DAC module 18 by the audio sample rate that AES3/EBU decoder modules export
Digital-to-analogue conversion frequency.
The asynchronous transport system of AES3/EBU digital audio provided in this embodiment, the LVDS interface 9 for sending end device are logical
Cross the LVDS interface 12 that light delivery module is connected to receiving end device.
The AES3/EBU signals source for sending the participation multiple connection of the roads end device Zhong Mei is selected by a toggle switch 5, per road
AES3/EBU signal sources may be from analog audio interface 3 or come from AES3/EBU audio input interfaces 10.
The signal source of every road analog audio interface 19 output of receiving end device is selected by a toggle switch, analog audio
Frequency source signal may be from S1 modules 1108 or come from AES3/EBU audio output interfaces 16.
Referring to attached drawing 3, end device will be sent and connect with end device is received, complete multi-functional AES3/EBU numbers sound is constituted
The modules such as asynchronous transport system frequently, wherein analog-to-digital conversion ADC, digital-to-analogue conversion DAC are also essential component part.
The not only adaptive a variety of transmission of the AES3/EBU interfaces of the multi-functional asynchronous transport system of AES3/EBU digital audio
Rate also supports the decoding function of the AES3/EBU encoding functions and AES3/EBU signals of analog signal.
The multi-functional asynchronous transport system of AES3/EBU digital audio provided in this embodiment, whole system are filled by transmitting terminal
It sets and is formed with receiving end device two parts, be based on Digital Multiple Connection Technique, using Xilinx Zynq XC7Z010 single-chips as at
Manage device.Transmitting terminal realizes the multiple connection of the asynchronous AES3/EBU digital audio and video signals of multichannel；Receiving terminal is completed to divide combining signal
It connects, restores the AES3/EBU signals of multiple branches.
End device is sent to restore the multi-channel A ES3/EBU digital audio and video signals for participating in multiple connection by data, decode, rate
Highspeed serial data stream all the way is merged into after the technical finesses such as identification, positive justification, time division multiplexing, scrambling to send.Ginseng
With the AES3/EBU digital signals of multiple connection, samples and be encoded into from 32,44.1,48 or 96kHz is carried out to analog audio signal
AES3/EBU digital audio and video signals；Or the sample rate directly inputted from outside is 32,44.1,48,96 or 192kHz's
AES3/EBU digital signals.
Receiving end device taps the high speed serialization signal bit stream for sending end device synthesis, this process uses data
The technologies such as recovery, descrambling, demultiplexing, code quick-recovery, clock digital smoothness, it is extensive to the carry out of every road AES3/EBU audio signals
Multiple, the AES3/EBU signals recovered maintain original sample rate.
It is realized to unknown, asynchronous, multi-speed using the above-mentioned multi-functional asynchronous transport system of AES3/EBU digital audio
The subdivision of rate AES3/EBU digital audio and video signals connects, and receiving terminal can restore digital audio and video signals with crude sampling rate, leads to
Multiplexed signal quantity can be increased and decreased to function module multiplexing by crossing, and be easy to extend, and have extensive adaptability.
Claims (3)
1. a kind of multi-functional asynchronous transport system of AES3/EBU digital audio, including send end device and receiving end device；Its
It is characterized in that：
The transmission end device includes：Transmitting terminal microprocessor（1）, at least two transmitting terminal AES3/EBU audio output interfaces
（2）, at least two transmitting terminal analog audio interface（3）, at least two ADC module（4）, one toggle switch of at least two transmitting terminal
（5）, two toggle switch of at least two（6）, transmitting terminal 24.576MHz crystal oscillators（7）, transmitting terminal 11.2896MHz crystal oscillators（8）, hair
Sending end LVDS interface（9）With at least two transmitting terminal AES3/EBU audio input interfaces (10)；The transmitting terminal AES3/EBU audios
Output interface（2）, transmitting terminal ADC module（4）, one toggle switch of transmitting terminal（5）, two toggle switch（6）, transmitting terminal
24.576MHz crystal oscillators（7）, transmitting terminal 11.2896MHz crystal oscillators（8）, transmitting terminal LVDS interface（9）, transmitting terminal AES3/EBU audios
Input interface（10）Respectively with transmitting terminal microprocessor（1）It is connected, transmitting terminal analog audio interface（3）With ADC module（4）Phase
Even；
The receiving end device includes：Receiving end microprocessor（11）, receiving terminal LVDS interface（12）, receiving terminal
24.576MHz crystal oscillators（13）, receiving terminal 11.2896MHz crystal oscillators（14）, at least two receiving terminal AES3/EBU audio output interfaces
（15）, at least two receiving terminal AES3/EBU audio input interfaces（16）, one toggle switch of at least two（17）, at least two connects
Receiving end DAC module（18）, at least two receiving terminal analog audio interface（19）；The receiving terminal LVDS interface（12）, receiving terminal
24.576MHz crystal oscillators（13）, receiving terminal 11.2896MHz crystal oscillators（14）, receiving terminal AES3/EBU audio output interfaces（15）, connect
Receiving end AES3/EBU audio input interfaces（16）, a toggle switch（17）Respectively with receiving end microprocessor（11）It is connected, connects
Receiving end analog audio interface（19）With receiving terminal DAC module（18）It is connected；
The transmitting terminal LVDS interface（9）With receiving terminal LVDS interface（12）Between pass through wired or wireless communication module realize pass
It is defeated.
2. a kind of multi-functional asynchronous transport system of AES3/EBU digital audio according to claim 1, it is characterised in that：
The transmitting terminal microprocessor（1）, including AES3/EBU coding modules（101）, digital signal multiplexing selection S1 modules
（102）, transmitting terminal AES3/EBU decoder modules（103）, rate detection module（104）, transmitting terminal ADC control modules（105）, number
According to synchronization module one（106）, time division multiplexing selection S2 modules（107）, data simultaneous module two（108）, positive justification module
（109）, time division multiplexing module（110）, scrambling module（111）.
3. a kind of multi-functional asynchronous transport system of AES3/EBU digital audio according to claim 1, it is characterised in that：
The receiving end microprocessor（11）, including data local recovery module（1101）, system clock generation module（1102）, solution
Disturb module（1103）, solution time division multiplexing module（1104）, Clock Extraction module（1105）, code speed detection module（1106）, just
Code quick-recovery module（1107）, signal bit stream select S1 modules（1108）, signal behavior S2 modules（1109）, receiving terminal AES3/
EBU decoder modules（1110）, receiving terminal DAC control modules（1111）.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721910794.0U CN207732909U (en) | 2017-12-30 | 2017-12-30 | A kind of multi-functional asynchronous transport system of AES3/EBU digital audio |
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|---|---|---|---|
| CN201721910794.0U CN207732909U (en) | 2017-12-30 | 2017-12-30 | A kind of multi-functional asynchronous transport system of AES3/EBU digital audio |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10877512B2 (en) | 2019-04-02 | 2020-12-29 | Beijing Xiaomi Mobile Software Co., Ltd. | Audio data transmission method and apparatus |
| CN112468214A (en) * | 2020-11-13 | 2021-03-09 | 西安空间无线电技术研究所 | Satellite-borne ADS-B group signal receiving and processing method |
-
2017
- 2017-12-30 CN CN201721910794.0U patent/CN207732909U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10877512B2 (en) | 2019-04-02 | 2020-12-29 | Beijing Xiaomi Mobile Software Co., Ltd. | Audio data transmission method and apparatus |
| CN112468214A (en) * | 2020-11-13 | 2021-03-09 | 西安空间无线电技术研究所 | Satellite-borne ADS-B group signal receiving and processing method |
| CN112468214B (en) * | 2020-11-13 | 2022-04-22 | 西安空间无线电技术研究所 | Satellite-borne ADS-B group signal receiving and processing method |
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