CN106534774A - Image transmission system - Google Patents
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- CN106534774A CN106534774A CN201610957513.0A CN201610957513A CN106534774A CN 106534774 A CN106534774 A CN 106534774A CN 201610957513 A CN201610957513 A CN 201610957513A CN 106534774 A CN106534774 A CN 106534774A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/70—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides an image transmission system. The system is characterized in comprising an image collection unit which is used for collecting to-be-transmitted image information; an image processing and coding unit which is connected with the image collection unit and is used for carrying out image processing on the image information and carrying out H.265 coding on the processed image information, thereby obtaining image coding information; and a wireless transmission unit which is connected with the image processing and coding unit and is used for generating corresponding wireless signals according to the image coding information and externally transmitting the wireless signals. The system is the image transmission system based on an H.265 technology and a 4G communication technology. The defect that a wire image transmission system is liable to be limited by an application scene can be effectively overcome, so the image transmission system is very applicable to an occasion that wireless transmission is limited.
Description
Technical field
The present invention relates to data communication technology field, specifically, is related to a kind of image delivering system.
Background technology
In transmission of video images field, wire transmission is a kind of implementation of mature economy.But for such as water conservancy
The occasion of the wire transmission such as project monitor and control, forest fire protection monitoring, public security commander and fire-fighting command inconvenience, will realize scene with prison
Image transmitting between control center is accomplished by the restriction for overcoming geographical environment to be brought.And if using wire transmission mode
Words, it is necessary to set up huge communication system at the scene between Surveillance center, and the erection of communication system is a time-consuming consumption
The process of fund, while laying of the fluctuating of landform also to the communications cable causes inconvenience between scene and Surveillance center.
Therefore, for above-mentioned application scenario, the application of video image Radio Transmission Technology becomes a kind of inevitable choice.So
And, due to the trend in the high Qinghua of monitoring field image, existing wireless transmission method cannot meet the biography to high-definition image
Defeated requirement.
The content of the invention
To solve the above problems, the invention provides a kind of image delivering system, it is characterised in that include：
Image acquisition units, which is used to gather image information waiting for transmission；
Image procossing and coding unit, which is connected with described image collecting unit, for carrying out figure to described image information
As processing, and H.265 the image information after process is encoded, obtained image coding information；
Wireless transmission unit, which is connected with described image process and coding unit, for according to described image coding information
Generate corresponding wireless signal and to emission.
Preferably, described image process and coding unit include set forth below to the image procossing that described image information is carried out
Any one of or several：
Denoising, image enhancement processing, dynamic contrast enhancing process, high light suppression process, BLC process, color
Color enhancing processes and rotates scaling process.
Preferably, after described image process and coding unit are configured to H.265 encode the image information after process,
The data that coding is obtained are packaged according to preset format, so as to obtain described image coding information.
Preferably, the wireless transmission unit includes 4G data transmission circuits.
Preferably, the system also includes：
Data storage cell, which is connected with described image process and coding unit, is processed and volume for storing described image
The data that code unit transmission comes.
Preferably, described image process and coding unit be configured to the wireless transmission unit and outside related device it
Between communication link it is abnormal when, described image coding information is transferred to into the data storage cell, with by the data storage
Unit is kept in.
Preferably, described image process and coding unit be configured to the wireless transmission unit and outside related device it
Between communication link when recovering normal, temporary data of the data storage cell during reading communication link exception, and reading
The data got are transferred to the wireless transmission unit.
Preferably, the system also includes：
Image-display units, which is connected with described image process and coding unit.
Present invention offers following beneficial effect：
1st, the present invention provide based on H.265 technology and the image delivering system of the 4G communication technologys, effectively can overcome has
The defect for easily being limited by application scenarios existing for line chart image transmission system, therefore be highly suitable to be applied for wire transmission and be restricted
Occasion.
2nd, as a result of H.265 coding techniques, therefore which can regard the image delivering system that the present invention is provided to high definition
Frequency is according to carrying out highly efficient compression, and also can improve the robustness and error recovery capabilities of data transfer, and also
Real-time time delay, signal acquisition time and Stochastic accessing time delay can be reduced.
3rd, when identical video data is transmitted, compared to the image delivering system for now possessing, figure provided by the present invention
Image transmission system is lower to the bandwidth requirement of cordless communication network, meanwhile, the system realizes data by 4G communication networks
It is wirelessly transferred, which can further ensure the reliability of data transfer.
4th, the image delivering system that the present invention is provided realized based on standard agreement, therefore which has and can expand well
Malleability, therefore the system can apply to various occasions by appropriate extension.
Other features and advantages of the present invention will be illustrated in the following description, also, partly be become from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by specification, rights
In claim and accompanying drawing, specifically noted structure is realizing and obtain.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing wanted needed for technology description to do simple introduction：
Fig. 1 is the structural representation of image delivering system according to an embodiment of the invention；
Fig. 2 is the circuit diagram of image delivering system according to an embodiment of the invention.
Specific embodiment
Describe embodiments of the present invention below with reference to drawings and Examples in detail, whereby how the present invention is applied
Technological means solving technical problem, and reach technique effect realize that process can fully understand and implement according to this.Need explanation
As long as not constituting conflict, each embodiment and each feature in each embodiment in the present invention can be combined with each other,
The technical scheme for being formed is within protection scope of the present invention.
Meanwhile, in the following description, many details are elaborated for illustrative purposes, to provide to of the invention real
Apply the thorough understanding of example.It will be apparent, however, to one skilled in the art, that the present invention can be without tool here
Body details or described ad hoc fashion are implementing.
In addition, can be in the department of computer science of such as one group of computer executable instructions the step of the flow process of accompanying drawing is illustrated
Perform in system, and, although show logical order in flow charts, but in some cases, can be with different from herein
Order perform shown or described step.
The Wireless Image Transmission Systems for being used in the market mostly based on 3G communication networks realizing, its data
Compression coding mode mostly is H.264 compression coding mode.However, with the further requirement for transmitting to high-definition image, it is existing
Some Wireless Image Transmission Systems expose its limitation.
Existing Wireless Image Transmission Systems are carried out data transmission based on 3G cordless communication networks, and are subject to 3G nets
The restriction of network bandwidth and transfer rate, existing Wireless Image Transmission Systems cannot carry out the transmission of high clear video image.
Meanwhile, the data encoding compress mode adopted by existing image delivering system is mostly H.264 technology, is based on
H.264 and the Wireless Image Transmission Systems of 3G technology are impossible to realize economic, feasible WirelessHD audio video transmission at present,
Limit the development of HD video industry.
For the above-mentioned problems in the prior art, the invention provides a kind of new image delivering system, the image
Transmission system employs high speed wireless communications network to carry out being wirelessly transferred for data, and system that employs and H.265 encode
Compress technique carrying out compression coding to data so that image information can in high speed wireless communications network more efficiently,
Reliably transmit.
Specifically, Fig. 1 shows the structural representation of the image delivering system provided by the present embodiment.
As shown in figure 1, the image delivering system provided by the present embodiment includes：Image acquisition units 101, graphics process and
Coding unit 102, wireless transmission unit 103, data storage cell 104 and image-display units 105.
Image acquisition units 101 can gather image information waiting for transmission, that is, realize the collection to high clear video image.Tool
Body ground, as shown in Fig. 2 in the present embodiment, image acquisition units 101 are preferably by 5,000,000 pixel high definition cmos sensor moulds
Group is realizing.5000000 pixel high definition cmos sensor modules are with wide dynamic, high sensitivity, big target surface cmos sensor MT9P006
For core, be aided with band IR-CUT high definitions autofocus lenses composition, its can support the output of 5,000,000 pixel JPEG pictures or
1080P 30fps HD videos are exported, and meet HD video/IMAQ application demand.
It is pointed out that in other embodiments of the invention, image acquisition units 101 can also be reasonable using other
Chip or circuit realizing, the invention is not restricted to this.
Again as shown in figure 1, in the present embodiment, image acquisition units 101 after image information waiting for transmission is collected,
These image informations can be transferred to image procossing and coding unit 102.Image procossing and coding unit 102 are receiving these
After image information, image procossing can be carried out to received image information, and H.265 the image information after process is compiled
Code compression, to obtain image coding information.
In the present embodiment, image procossing and coding unit 102 are entered to the image information that the transmission of image acquisition units 101 comes
Capable process includes：Denoising, image enhancement processing, dynamic contrast enhancing process, high light suppression process, at BLC
Reason, color enhancement process, lens distortion calibration process and rotation scaling are processed.Certainly, in other embodiments of the invention, root
According to being actually needed, the image procossing carried out by image procossing and coding unit both can only comprising arbitrary in item listed above
Or several, it is also possible to comprising other unlisted reasonable items, the invention is not restricted to this.
Compared with H.264 coding techniques, H.265 coding techniques provides more different instruments to reduce code check.To encode
For unit, H.264 in each macro block (marcoblock, MB) size be all fixed 16x16 pixels, and coding H.265
Unit can be selected from minimum 8x8 to maximum 64x64.The macro block of the few region division of information content is larger, after coding
The macro block divided where code word is less, and details is more is just corresponding little and more, and the code word after coding is more.Thus phase
When in the coding for having emphasis has been carried out to image, so as to reduce overall code check, code efficiency just accordingly improves.Meanwhile,
H.265 intra prediction mode supports 33 kinds of directions (H.264 only supporting 8 kinds), and provides more preferable motion compensation process
And vector prediction method.
Mass ratio repeatedly is relatively tested it has been shown that under identical image quality, compared to H.264, by H.265 compiling
H.264, the video code flow size ratio of code reduces about 39-44%.Due to the assay method difference of quality control, this data
Have corresponding change.The data display drawn by subjective vision test, in the case where code check reduces 51-74%, H.265
The quality of encoded video can also be approximate with H.264 encoded video even better, and which is essentially better than expected signal to noise ratio.
The total Three models of current HEVC standard：Main, Main 10 and Main Still Picture.Main patterns support 8bit
Color depth (i.e. redgreenblue respectively has 256 colourities, totally 1,670 ten thousand color), Main10 patterns support 10bit color depths, it will for surpassing
On HDTV.Chroma is all limited to 4 by the above two：2：0.Expection will have been extended to standard in 2014, will
4 can be supported：2：2 and 4：4：4 sample formats (i.e. there is provided higher color rendition degree) and multi-view coded (such as 3D stereopsis
Frequency is encoded).
It can thus be seen that H.265 H.264 coding techniques is mainly around existing video encoding standard, which is being protected
Stay outside some technical characteristics H.264, also add can improve between code stream, coding quality, time delay and algorithm complex
The related technology such as relation.The image delivering system provided by the present embodiment is by using H.265 coding techniques can be effective
Compression efficiency, robustness and the error recovery capabilities of data are improved, and also when can effectively reduce real-time time delay, signal acquisition
Between and Stochastic accessing test, additionally it is possible to effectively reduce algorithm complex.
In the present embodiment, H.265 image procossing and coding unit 102 pairs encode the data for obtaining and carry out according to preset format
Encapsulation, so as to obtain image coding information.What image coding information transmission was attached thereto by image procossing and coding unit 102
Wireless transmission unit 103, to generate corresponding wireless signal and to outgoing according to image coding information from wireless transmission unit 103
Send.
It is pointed out that in the present embodiment, image procossing and coding unit 102 are preferably in the control of Operations Analysis
Image coding information is transferred to into wireless transmission unit 103 under system, to be sent out by wireless transmission unit 103, meanwhile, must
Will in the case of, image procossing and coding unit 102 can with the control of operation control base of a fruit Na unit by image coding information
High-speed wired data transmission unit is transferred to, enters row data communication with external devices with by high-speed wired data transmission unit.
Specifically, as shown in Fig. 2 in the present embodiment, image procossing and coding unit come preferably by HI3516A chips
Realize, the chip is contained H.264, H.265 and the video interface such as JPEG, process and coding unit.5000000 pixel high definitions
HD video/image that cmos sensor module is collected passes to HI3516A chips by high speed LVDS interface and carries out subsequently
Process, meanwhile, HI3516A chips carry out 3A to 5,000,000 pixel high definition CMOS sensor units by I2C interfaces, and (AE exposes automatically
Light/AWB AWBs/AF auto-focusings) control, the collection effect of HD video/image is reached most preferably.
The subsystem of video of HI3516A chips supports H.265 hard coded, and its coding delay is very little.Simultaneously as
H.265 coded system only needs the bandwidth of H.264 coded system 1/3rd to can be achieved with transmitting high-definition video signal glibly, because
This transmission by the wireless high-definition video/image of low cost can be realized using H.265 coding, and then promotion HD video should
Popularization.In addition, in terms of low-light (level), H.265 coding techniques also more wins H.264 coded system one and raises.
It is pointed out that in other embodiments of the invention, image procossing and coding unit can also adopt other
Rational chip or circuit the invention is not restricted to this realizing.
On the basis of using H.265 encoding, the stream rate of HD video still can reach more than 4Mbps, if
The HD video code stream bandwidth of 60fps then requires more than 6Mbps.Consideration technology and cost factor, in the present embodiment, are wirelessly transferred
Unit preferably includes 4G data transmission circuits.Wherein, in different embodiments of the invention, 4G data transmission circuits both can be with
It is the data transmission circuit based on FDD-LTE, or the data transmission circuit based on TDD-LTE, its interface is preferably adopted
With the Mini PCI Express interfaces of standard.
As shown in Fig. 2 in the present embodiment, the system is from the 4G communications modules for supporting TDD-LTE and FDD-LTE simultaneously
Realizing, the maximum uplink transmission rate of the module is 50Mbps UL@20MHz BW to ME3760, it is considered to real network environment and
Drop volume, which can meet HD video transmission bandwidth demand well.
Certainly, in other embodiments of the invention, according to actual needs, can also be from other rational 4G communications cores
Piece (such as, from cost consideration, selecting only to support the 4G communication chips of TDD-LTE or FDD-LTE) realizing wireless transmission unit,
The invention is not restricted to this.
In the present embodiment, the transmission of wireless signals that wireless transmission unit 103 will can be generated according to image coding information
Give corresponding external equipment (such as Cloud Server), it is also possible to receive the number that counterpart external device (such as Cloud Server) sends
According to and/or control information, and these data and/or control information are transferred to the Operations Analysis being attached thereto.
It is pointed out that in different embodiments of the invention, image procossing and coding unit and Operations Analysis
Both (i.e. the two is integrated in same chip) can be realized using same chip, it would however also be possible to employ different chips or circuit come
Realize, the invention is not restricted to this.
Again as shown in figure 1, the image delivering system provided by the present embodiment also includes：Data storage cell 104 and figure
As display unit 105.Wherein, data storage cell 104 and image-display units 105 with image procossing and coding unit 102
Connection, the data that data storage cell 104 is processed for storage image and the transmission of coding unit 102 comes, and image-display units
105 image procossing and coding unit 102 can be transmitted the video/image data come and are directly displayed at locally.It may be noted that
, in other embodiments of the invention, in case of need, image-display units 105 can also be by calling data
The image coded data stored in memory cell 104 is carrying out local high definition broadcasting.
As shown in Fig. 2 in the present embodiment, data storage cell 104 is realized preferably by SD card.The capacity of the SD card
Preferably more than 32G, which is passed through SDIO interfaces and is connected with HI3516A chips, to realize the storage of data.
In the present embodiment, when the wireless communication link between wireless transmission unit 103 and external equipment is normal, at image
Image coding information is preferentially converted to by wireless transmission unit 103 and be sent to after wireless signal by reason and edit cell 102
External equipment.And when the wireless communication link between wireless transmission unit 103 and external equipment is abnormal, image procossing and editor
Image coding information then can be transferred to data storage cell 104 by unit 102, temporary to carry out data by data storage cell 104
Deposit.
After the wireless communication link between wireless transmission unit 103 and external equipment recovers, image procossing and editor are single
Unit 102 can then read the data stored in data storage cell 104, and these data are transferred to wireless transmission unit 103, with
External equipment is sent these data to by wireless transmission unit 103.
In the present embodiment, image-display units 105 preferably by using standard HDMI come with image procossing and volume
Code unit 102 enters row data communication.As shown in Fig. 2 image coding information is transferred to by HI3516A chips by BT1120 interfaces
HDMI sends chip SiI9022A process, subsequently by standard HDMI exporting to display.
Certainly, in other embodiments of the invention, image-display units 105 can also adopt other rational circuit shapes
Formula the invention is not restricted to this entering row data communication with image procossing and coding unit 102.
The image delivering system passed through by the present embodiment also includes battery management unit, and battery management unit can be system
In each consuming parts electric energy is provided.Specifically, in the present embodiment, the importation of battery management unit includes standard 12V
Main power source is input into, and 12V dc sources can be converted to 5V, 3.3V, 1.8V, 1.5V by different DC-DC change-over circuits by which
And 1.1V dc sources are powered come each consuming parts for image delivering system.Certainly, in the other embodiment of the present invention
In, according to the need for electricity of each consuming parts in image delivering system, battery management unit can also provide other reasonable shapes
The power supply of formula, the invention is not restricted to this.
From foregoing description as can be seen that the present invention provide based on H.265 technology and the image transmitting of the 4G communication technologys
System, can effectively overcome the defect for easily being limited by application scenarios existing for wired image delivering system, therefore be especially suitable for
The restricted applications of wire transmission.
Meanwhile, the image delivering system is as a result of H.265 coding techniques, therefore which can enter to HD video data
The highly efficient compression of row, and also the robustness and error recovery capabilities of data transfer can be improved, and also can reduce
Real-time time delay, signal acquisition time and Stochastic accessing time delay.When identical video data is transmitted, compared to the image for now possessing
Transmission system, image delivering system provided by the present invention are lower to the bandwidth requirement of cordless communication network, meanwhile, the system is led to
Cross 4G communication networks to realize being wirelessly transferred for data, which can further ensure the reliability of data transfer.
Additionally, image delivering system provided by the present invention is realized based on standard agreement, therefore which has very well
Extensibility, therefore the system can apply to various occasions by appropriate extension.
It should be understood that disclosed embodiment of this invention is not limited to ad hoc structure disclosed herein, process step
Or material, and the equivalent substitute of these features that those of ordinary skill in the related art are understood should be extended to.Should also manage
Solution, term as used herein are only used for the purpose for describing specific embodiment, and are not intended to limit.
" one embodiment " or " embodiment " mentioned in specification means special characteristic, the structure for describing in conjunction with the embodiments
Or characteristic is included at least one embodiment of the present invention.Therefore, the phrase " reality that specification various places throughout occurs
Apply example " or " embodiment " same embodiment might not be referred both to.
Although above-mentioned example is used to illustrate principle of the present invention in one or more applications, for the technology of this area
For personnel, in the case of the principle and thought without departing substantially from the present invention, hence it is evident that can in form, the details of usage and enforcement
It is upper various modifications may be made and without paying creative work.Therefore, the present invention is defined by the appended claims.
Claims (8)
1. a kind of image delivering system, it is characterised in that include：
Image acquisition units, which is used to gather image information waiting for transmission；
Image procossing and coding unit, which is connected with described image collecting unit, for carrying out at image to described image information
Reason, and H.265 the image information after process is encoded, obtain image coding information；
Wireless transmission unit, which is connected with described image process and coding unit, for being generated according to described image coding information
Corresponding wireless signal to emission.
2. the system as claimed in claim 1, it is characterised in that described image process and coding unit enter to described image information
Capable image procossing includes any one of item set forth below or several：
Denoising, image enhancement processing, dynamic contrast enhancing process, high light suppression process, BLC process, color increase
Manage and rotate scaling and process in strength.
3. system as claimed in claim 1 or 2, it is characterised in that described image process and coding unit are configured to processing
H.265, after image information afterwards is encoded, the data that coding is obtained are packaged according to preset format, it is described so as to obtain
Image coding information.
4. the system as any one of claims 1 to 3, it is characterised in that the wireless transmission unit includes 4G data
Transmission circuit.
5. the system as any one of Claims 1 to 4, it is characterised in that the system also includes：
Data storage cell, which is connected with described image process and coding unit, and for storing, described image is processed and coding is single
The data that unit's transmission comes.
6. system as claimed in claim 5, it is characterised in that described image process and coding unit are configured to described wireless
When communication link between transmission unit and outside related device is abnormal, described image coding information is transferred to into the data and is deposited
Storage unit, to be kept in by the data storage cell.
7. system as claimed in claim 6, it is characterised in that described image process and coding unit are configured to described wireless
When communication link between transmission unit and outside related device recovers normal, during reading communication link exception, the data are deposited
The temporary data of storage unit, and the data for reading are transferred to into the wireless transmission unit.
8. the system as any one of claim 5～7, it is characterised in that the system also includes：
Image-display units, which is connected with described image process and coding unit.
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|---|---|---|---|---|
| CN110753229A (en) * | 2019-11-15 | 2020-02-04 | 天津光电通信技术有限公司 | Video acquisition device and method based on H.265 coding |
| CN112887544A (en) * | 2021-01-21 | 2021-06-01 | 上海航天测控通信研究所 | Integrated wireless WIFI camera device suitable for carrier rocket |
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Application publication date: 20170322 |