CN206332775U - A kind of wireless video transmission system - Google Patents
A kind of wireless video transmission system Download PDFInfo
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- CN206332775U CN206332775U CN201720043883.3U CN201720043883U CN206332775U CN 206332775 U CN206332775 U CN 206332775U CN 201720043883 U CN201720043883 U CN 201720043883U CN 206332775 U CN206332775 U CN 206332775U
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Abstract
A kind of wireless video transmission system of the utility model, it includes wireless video transmitting subsystem, transmitting antenna, reception antenna, wireless video receiving subsystem；Wherein wireless video transmitting subsystem includes audio-video collection module, audio/video coding module, OFDM modulation modules, the first radio-frequency module and the power amplification PA modules being sequentially electrically connected with；Wherein wireless video receiving subsystem shows playing module including the second radio-frequency module being sequentially electrically connected with, OFDM demodulation module, audio/video decoding module, audio frequency and video；The utility model passes through the different architecture designs to wireless video transmission system, the transmission demand of zero propagation is realized using the scheme of video acquisition plus OFDM transmission, the scheme of OFDM transmission is added to realize remote transmission demand using video acquisition plus H.265/HEVC with AAC video/audio encoding and decodings, to solve the deficiency of existing wireless video transmission system, overcome its transmission range short, the big defect of transmission delay.
Description
Technical field
The utility model is related to radio communication and medium technique, more particularly to a kind of wireless video transmission system.
Background technology
It is logical from OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexi)
Since letter technology develops, used in many communication systems.Ofdm communication technology has good anti-multipath jamming special
Property, low complex degree characteristic, high spectrum utilization characteristic, because its excellent characteristic is widely used in wireless communication field.In addition,
Audio-video frequency media processing, encoding and decoding scheduling algorithm are also developed rapidly, and more and more extensively, market is to wireless for wireless video application
The picture quality of Video transmission system, delay, distance have more and more harsh requirement, and it is in DAB and transmission of video system
The fields such as system, unmanned plane are widely used.Therefore, research wireless video transmission system is very necessary and important.
In existing wireless video transmission system, the transmission plan modulated frequently with audio/video coding plus OFDM/COFDM
Structure, is typically coding and decoding video scheme H.264/AVC, AAC audio coding decoding scheme.In addition, it is specific to meet
Need, also need to be equipped with audio-video collection module, video/audio shows playing module, radio-frequency signal processing module etc..Prior art
It is limited generally to there is transmission range in scheme, postpones larger, and quality is unstable to wait applied defect.Camera, the module such as encoder is equal
The connection between certain delay, and multimode chip can be caused, due to unreasonable in design, increase can be caused to postpone, matter
Quantitative change is poor, and transmission range is had a greatly reduced quality, and influences transmission performance, be wirelessly transferred target, it is necessary to reduce with equidistant to reach
Transmitted data amount, or increase transmission power to realize, such technical scheme faces zero propagation, or during long-distance transmissions demand
The problem of all there is scarce capacity.
Therefore, in the urgent need to a kind of achievable zero propagation of research or the wireless video receiving system of long-distance transmissions.
The content of the invention
Based on above-mentioned situation, to overcome defect present in existing wireless video transmission system technical scheme, this practicality is new
The first purpose of type, is to provide a kind of achievable zero propagation or the wireless video transmission system of long-distance transmissions.
A kind of wireless video transmission system, including wireless video transmitting subsystem, transmitting antenna, reception antenna, wirelessly regard
Frequency receiving subsystem；The wireless video transmitting subsystem includes audio-video collection module, the audio frequency and video volume being sequentially electrically connected with
Code module, OFDM modulation modules, the first radio-frequency module and power amplification PA modules；The power amplification PA modules and transmitting antenna
Being electrically connected with the wireless video receiving subsystem includes the second radio-frequency module being sequentially electrically connected with, OFDM demodulation module, sound
Video decoding module, audio frequency and video show playing module；Second radio-frequency module is electrically connected with reception antenna；The transmitting day
Line and reception antenna wireless communication connection.
Further, the audio-video collection module is made up of collecting device with audio-video collection process chip, described to adopt
Integrate apparatus output signal interface as HDMI；The output end of the audio-video collection module and the input phase of audio/video coding module
Connection.
Further, the audio/video coding module is made up of SoC chip, the audio/video coding module output end with
The input of OFDM modulation modules is connected；
Specifically, the OFDM modulation modules are made up of modulator chips, the OFDM modulation modules output end is with penetrating
Frequency module input is connected.
As one kind improvement, first radio-frequency module is made up of DAC chip and mixer chips, the first radio frequency mould
Block output end access power amplifier PA input, the power amplifier PA output ends are connected to transmitting antenna.
As a further improvement, second radio-frequency module is made up of LNA chips, ADC chips and tuner chips, it is described
The input of second radio-frequency module is connected with reception antenna, and the output end of second radio-frequency module is defeated with OFDM demodulation module
Enter end connection.
As one kind improvement, the OFDM demodulation module is made up of demodulator chips, and the OFDM demodulation module is defeated
Go out end with audio/video decoding module input to be connected；The audio/video decoding module is made up of SoC chip, the audio frequency and video solution
Code module output end shows that playing module input is connected with audio frequency and video.
Further, the transmitting antenna and reception antenna use high-gain fiberglass omnidirectional antenna.
Specifically, the audio frequency and video show that playing module is made up of liquid crystal display, the broadcasting for completing audio frequency and video is shown.
Further, the collecting device, which is chosen, supports HDMI signal outputs, 1080P30 video formats, 48kHz audios
The high definition moving camera of sampling.
Launch subsystem, transmitting antenna the utility model proposes a kind of wireless video transmission system, including wireless video, connect
Receive antenna, wireless video receiving subsystem；Wherein wireless video transmitting subsystem includes the audio-video collection being sequentially electrically connected with
Module, audio/video coding module, OFDM modulation modules, the first radio-frequency module and power amplification PA modules；Wherein wireless video connects
Subsystem is received to show including the second radio-frequency module being sequentially electrically connected with, OFDM demodulation module, audio/video decoding module, audio frequency and video
Playing module；The utility model is passed by the different architecture designs to wireless video transmission system using video acquisition plus OFDM
Defeated scheme realizes the transmission demand of zero propagation, adds OFDM using video acquisition plus H.265/HEVC with AAC video/audio encoding and decodings
The scheme of transmission realizes remote transmission demand, to solve the deficiency of existing wireless video transmission system, overcomes its transmission distance
From short, the big defect of transmission delay.
Brief description of the drawings
Fig. 1 is a kind of wireless video transmission system overall structure schematic block diagram of the utility model；
Fig. 2 is a kind of modular structure schematic block diagram of wireless video transmission system of the utility model.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage become apparent from, it is right below in conjunction with drawings and Examples
The utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain this reality
With new, it is not used to limit the utility model.
A kind of wireless video transmission system of the utility model as shown in Figure 1, including wireless video transmitting subsystem 10, hair
Penetrate antenna 20, reception antenna 30, wireless video receiving subsystem 40；As shown in Fig. 2 wireless video shown in it launches subsystem
By audio-video collection module 11, audio/video coding module 12, OFDM modulation modules 13, the first radio-frequency module 14, power amplification PA
Module 15 is constituted；Wireless video receiving subsystem shown in it is by the second radio-frequency module 41, OFDM demodulation module 42, audio frequency and video solution
Code module 43, audio frequency and video show that playing module 44 is constituted.
In the present embodiment, to meet long-distance transmissions demand as target, audio-video collection module 11 is chosen and supports HDMI letters
Number output, 1080P30 video formats, the high definition moving camera of 48kHz audio samples, audio-video collection process chip select
ADV7611, the HDMI data-signals for receiving video camera output complete audio, the reception of video image acquisition data, and will
Video image is converted into the output of BT1120 digital signal transmission standard agreements form, and audio is exported by I2S protocol formats, its
Output end is connected with the input of audio/video coding module 12.
Audio/video coding module 12, is made up of SoC (System on Chip, on-chip system) chip, further to realize
Reduce code check, it is ensured that picture quality, to lift transmission range, from H.265/HEVC Video coding and AAC audio codings,
Realize the compression processing of data flow.In the present embodiment, Hi3516A chips, linux systems built in the SoC chip are thought from Huawei sea
System kernel, supports multichannel H.265 compression coding, and registrable multiple audio coders are complete by BT1120 interfaces and I2S interfaces
Into the reception of video/audio, compression coding is realized by SDK, and is TS with reference to ISO/IEC 13818-1 standards packaging multiplexing
Stream format, is exported by USB interface.
The radio-frequency module 14 of OFDM modulation modules 13 and first is by transmitter (transmitting, the modulator containing modulation, digital-to-analogue
Change DAC, up-conversion mixer) chip composition, digital modulation, digital-to-analogue conversion and carrier modulation are completed, required work is upconverted to
Working frequency is transformed into radio frequency rf signal, module output end access power amplifier PA modules 15, power amplifier PA modules 15
Output end is connected to transmitting antenna transmitting 20.In the present embodiment, from connection sun ITE IT951X series emissions chips, with
Exemplified by IT9517, modulation, digital-to-analogue conversion and LPF and upconversion function are internally integrated, radio frequency letter can be directly exported
Number, the chip supports the transmission of TS stream format, supports USB transmission interface.In the present embodiment, USB interface is passed through by IT9517 chips
The TS form audio/video flows exported from Hi3516A USB ports are received, RF operating frequency is adjusted to 490MHz, and bandwidth is adjusted to
8MHz, is met long-distance transmissions to configure QPSK modulation systems, exports video RF signal, air to air transmitted with 50km in embodiment
It is required that for, the power amplifier PA of 5W sizes is configured, remote demand is met.Transmitting antenna 20 is complete from high-gain fiberglass
To antenna.
OFDM demodulation module 42 (is received, LNA containing low-noise amplifier, tuner RF with radio-frequency module 41 by receiver
Tuner, analog-to-digital conversion ADC, demodulate demodulator) chip composition, it is connected to reception antenna 30, OFDM demodulation module
42 complete the low noise amplification LNA functions of radiofrequency signal with radio-frequency module 41, and carrier wave demodulation completes down coversion, and modulus
ADC conversions become data signal, realize OFDM digital demodulations, output TS streams.In the present embodiment, from connection sun ITE IT913X
Series emissions chip, by taking IT9137 as an example, is internally integrated LNA LNA, tuner tuner down coversions, analog-to-digital conversion ADC and
OFDM demodulation function, the chip supports the transmission of TS stream format, supports USB transmission interface, can directly receive radio frequency rf signal, with
USB port exports TS audiovisual compression streams.
Audio/video decoding module 43, is made up of SoC chip, is matching coding end, from H.265/HEVC video decoding with
And AAC audio decoders, realize the decompression of data flow.In the present embodiment, Hi3798M chips, the SoC are thought from Huawei sea
Built-in chip type Linux system kernel, supports that H.265 multichannel decodes display, audio/video decoding is realized by SDK.In the present embodiment,
TS streams are received by USB port by Hi3798M, TS stream demultiplexings are first done by SDK, then does and is H.265 decoded with AAC, by
HDMI output signal, terminal device is shown by the broadcasting for supporting the liquid crystal display of HDMI to complete the naked code stream of audio frequency and video
Show function.
To meet under the conditions of closer distance, the transmission requirement of zero propagation in another embodiment, can cancel wireless video
Encoding and decoding processing in transceiver subsystem audio/video coding module 12, is directly converted into numeral to HDMI signals by ADV7611
Video/audio signal, the multiplexing of TS streams and demultiplexing function are completed by fpga chip, and by USB port with joining sun ITE transmitting, connecing
Chip docking is received, zero propagation Transmission system apparatus function is closely descended in realization.
Launch subsystem, transmitting antenna the utility model proposes a kind of wireless video transmission system, including wireless video, connect
Receive antenna, wireless video receiving subsystem；Wherein wireless video transmitting subsystem includes the audio-video collection being sequentially electrically connected with
Module, audio/video coding module, OFDM modulation modules, the first radio-frequency module and power amplification PA modules；Wherein wireless video connects
Subsystem is received to show including the second radio-frequency module being sequentially electrically connected with, OFDM demodulation module, audio/video decoding module, audio frequency and video
Playing module；The utility model is passed by the different architecture designs to wireless video transmission system using video acquisition plus OFDM
Defeated scheme realizes the transmission demand of zero propagation, adds OFDM using video acquisition plus H.265/HEVC with AAC video/audio encoding and decodings
The scheme of transmission realizes remote transmission demand, to solve the deficiency of existing wireless video transmission system, overcomes its transmission distance
From short, the big defect of transmission delay.
The above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
Art personnel, on the premise of the utility model principle is not departed from, can also make some improvements and modifications, these improvements and modifications
Also it should be regarded as protection domain of the present utility model.
Claims (10)
1. a kind of wireless video transmission system, it is characterised in that including wireless video transmitting subsystem, transmitting antenna, receive day
Line, wireless video receiving subsystem；Audio-video collection module that wireless video transmitting subsystem includes sequentially being electrically connected with,
Audio/video coding module, OFDM modulation modules, the first radio-frequency module and power amplification PA modules；The power amplification PA modules with
Transmitting antenna is electrically connected with the second radio-frequency module, the OFDM demodulation that the wireless video receiving subsystem includes sequentially being electrically connected with
Module, audio/video decoding module, audio frequency and video show playing module；Second radio-frequency module is electrically connected with reception antenna；Institute
State transmitting antenna and reception antenna wireless communication connection.
2. wireless video transmission system as claimed in claim 1, it is characterised in that the audio-video collection module is set by gathering
Standby to be constituted with audio-video collection process chip, the collecting device output signal interface is HDMI；The audio-video collection module
Output end be connected with the input of audio/video coding module.
3. wireless video transmission system as claimed in claim 1, it is characterised in that the audio/video coding module is by SoC cores
Piece is constituted, and the audio/video coding module output end is connected with the input of OFDM modulation modules.
4. wireless video transmission system as claimed in claim 1, it is characterised in that the OFDM modulation modules by
Modulator chips are constituted, and the OFDM modulation modules output end is connected with radio-frequency module input.
5. wireless video transmission system as claimed in claim 1, it is characterised in that first radio-frequency module is by DAC chip
And mixer chips are constituted, the input of the first radio-frequency module output end access power amplifier PA, the power amplifier
PA output ends are connected to transmitting antenna.
6. wireless video transmission system as claimed in claim 1, it is characterised in that second radio-frequency module by LNA chips,
ADC chips and tuner chips are constituted, and the input of second radio-frequency module is connected with reception antenna, the second radio frequency mould
The output end of block is connected with the input of OFDM demodulation module.
7. wireless video transmission system as claimed in claim 1, it is characterised in that the OFDM demodulation module by
Demodulator chips are constituted, and the OFDM demodulation module output end is connected with audio/video decoding module input；The sound
Video decoding module is made up of SoC chip, and the audio/video decoding module output end shows playing module input with audio frequency and video
It is connected.
8. wireless video transmission system as claimed in claim 1, it is characterised in that the transmitting antenna and reception antenna are used
High-gain fiberglass omnidirectional antenna.
9. wireless video transmission system as claimed in claim 1, it is characterised in that the audio frequency and video show playing module by liquid
Crystal display is constituted, and the broadcasting for completing audio frequency and video is shown.
10. wireless video transmission system as claimed in claim 2, it is characterised in that the collecting device, which is chosen, supports HDMI
Signal output, 1080P30 video formats, the high definition moving camera of 48kHz audio samples.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720043883.3U CN206332775U (en) | 2017-01-12 | 2017-01-12 | A kind of wireless video transmission system |
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| CN201720043883.3U CN206332775U (en) | 2017-01-12 | 2017-01-12 | A kind of wireless video transmission system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108259834A (en) * | 2018-02-12 | 2018-07-06 | 南京六九零二科技有限公司 | A kind of high definition radio transmitting device of extremely low delay |
| CN109246384A (en) * | 2018-10-26 | 2019-01-18 | 深圳职业技术学院 | A kind of wireless image transmission system for Remote Video Conference |
| CN110312158A (en) * | 2018-03-27 | 2019-10-08 | 北京市博汇科技股份有限公司 | A kind of monitoring method and device of embedded more pictures |
| CN113763969A (en) * | 2021-08-31 | 2021-12-07 | 惠州视维新技术有限公司 | Signal processing system and remote device |
-
2017
- 2017-01-12 CN CN201720043883.3U patent/CN206332775U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108259834A (en) * | 2018-02-12 | 2018-07-06 | 南京六九零二科技有限公司 | A kind of high definition radio transmitting device of extremely low delay |
| CN108259834B (en) * | 2018-02-12 | 2020-05-05 | 南京六九零二科技有限公司 | High-definition wireless transmission device with extremely low time delay |
| CN110312158A (en) * | 2018-03-27 | 2019-10-08 | 北京市博汇科技股份有限公司 | A kind of monitoring method and device of embedded more pictures |
| CN109246384A (en) * | 2018-10-26 | 2019-01-18 | 深圳职业技术学院 | A kind of wireless image transmission system for Remote Video Conference |
| CN113763969A (en) * | 2021-08-31 | 2021-12-07 | 惠州视维新技术有限公司 | Signal processing system and remote device |
| CN113763969B (en) * | 2021-08-31 | 2024-04-30 | 惠州视维新技术有限公司 | Signal processing system and remote device |
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