CN103428496B - A kind of space TDICCD camera image real-time Transmission, compress and store device - Google Patents
A kind of space TDICCD camera image real-time Transmission, compress and store device Download PDFInfo
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- CN103428496B CN103428496B CN201310356464.1A CN201310356464A CN103428496B CN 103428496 B CN103428496 B CN 103428496B CN 201310356464 A CN201310356464 A CN 201310356464A CN 103428496 B CN103428496 B CN 103428496B
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Abstract
The present invention relates to a kind of space TDICCD camera image real-time Transmission, compress and store device, including: CCD each passage senior middle school low speed transmission unit；Picture frame structural unit；Compression parameters memorizer；Compression chip array；Compression chip controller；Storage array controllers and error correcting encoder；The solid memory cell of Large Copacity；Compressed bit stream transmission unit.The space TDICCD camera image real-time Transmission of the present invention, compress and store device, each channel image data of CCD that can reliably transmit, and by image transmitting to image Real Time Compression unit.Image Real Time Compression unit sampling frame Constructing Policy, special chip Compression Strategies etc..Compressed bit stream stores in Large Copacity nand flash memory under error correction algorithm, to overcome single-particle inversion phenomenon.Final compressed bit stream is transferred in satellite data transmission system by G level transmission means.
Description
Technical field
The invention belongs to space multi-spectral TDICCD camera electronic system and develop field, be specifically related to a kind of empty
Between TDICCD camera image real-time Transmission, compress and store device.
Background technology
Along with space phase based on multispectral time delay integration (TDI) charge-coupled image sensor (CCD) imaging technique
Machine improving constantly on visual field and resolution index request, the multispectral CCD used splicing sheet number and reading
Go out speed be also on the increase and improve, so that the ccd image data volume after digitized is significantly increased, satellite
Memory span is limited, and transmission bandwidth is limited.Therefore, must be compressed before image information is transmitted earthward.
Generally CCD image-generating unit near focal plane, and compression of images with storage system in dynamo-electric unit mutually, the two
Camera is farther out, it is therefore desirable to special image delivering system is transmitted.Owing to the image of transmission is original graph
As therefore data volume is the hugest, system is huge, cable increases to use conventional image transmitting mode necessarily to cause,
Power consumption increases.
Multi-spectral CCD Camera image Real Time Compression storage device is positioned at CCD image-generating unit and satellite data transmission system
Between, do not require nothing more than image and carry out Real Time Compression, to reduce design complexities the most as far as possible, reduce power consumption.
Use hardware to realize not only complicated, resource occupation about image compression algorithm at present greatly but also to be difficult to reach camera
Required real-time, uses hardware to realize also being difficult to be dissolved in camera system simultaneously.It addition, camera by
In being operated in spatial environments, the impact of easy raying causes image storage generation single-particle inversion phenomenon,
Therefore have to design special technology storage is protected.
Summary of the invention
In order to solve above-mentioned space multi-spectral TDICCD image transmitting, compress and store in system development and deposit
Problem, the invention provides a kind of space TDICCD camera image real-time Transmission, compress and store dress
Put.
In order to solve above-mentioned technical problem, technical scheme is specific as follows:
A kind of space TDICCD camera image real-time Transmission, compress and store device, including:
CCD each passage senior middle school low speed transmission unit, including: low speed transmissions unit, middling speed transmission unit, height
Speed transmission unit and error correction ECC coding module；
Picture frame structural unit, being used for constructing size is M × N picture frame；
Compression parameters memorizer, is used for that compressed encoding parameter is imported to compression chip and normally works；
Compression chip controller, including: ADV212 coding parameter, memorizer arrange state machine, view data
Input block, image buffer storage, compressed bit stream read unit；
Compression chip array, is used for compressing multichannel ccd image data；
Storage array controllers and error correcting encoder, including: flash memory read states machine, write state machine, erasing shape
State machine, bad-block managing unit and RS error correction encoding unit；
The solid memory cell of Large Copacity, including: nand flash memory array and power supply unit；
Compressed bit stream transmission unit, including: G level transmission chip, host-host protocol, data transmission link are set up
And error correction encoding unit.
In technique scheme, in described CCD each passage senior middle school low speed transmission unit, described low speed transmissions list
Unit, middling speed transmission unit, high-speed transfer unit, include host-host protocol and read-write control unit respectively.
In technique scheme, described picture frame structural unit includes: SDRAM init state machine, refreshing
State machine, data read states machine, data write state machine and the SDRAM of ping-pong operation.
In technique scheme, described compression parameters memorizer includes: EEROM memorizer, I2C agreement are read
Write control unit and RAM.
In technique scheme, described compression chip array includes: ADV212, chip configuration circuit and crystalline substance
Shake.
The present invention has a following beneficial effect:
Apparatus of the present invention can receive camera all channel C CD raw image data；Real Time Compression camera owns
Channel C CD raw image data；Hardware mode channel C CD all to camera original image is used to carry out reality
Time compression.Data after storage camera all channel image compression；Adjust image compression rate, input picture gray scale
The parameters such as progression, input image data sample rate；Compression bit rate is sent to Data transfer system.
Accompanying drawing explanation
With detailed description of the invention, the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the space TDICCD camera image real-time Transmission of the present invention, compresses and store a kind of tool of device
The apparatus structure block diagram of body embodiment.
Reference in figure is expressed as:
1-CCD each passage senior middle school low speed transmission unit；2-picture frame structural unit；3-compression parameters memorizer；
4-compression chip controller；5-compression chip array；6-storage array controllers and error correcting encoder；7-great Rong
The solid memory cell of amount；8-compressed bit stream transmission unit.
Detailed description of the invention
The invention thought of the present invention is:
Low speed, middling speed and high speed image data may be exported, the corresponding transmission of design according to CCD image-generating unit
System, uses ECC error correction coding strategy when transmission simultaneously, improves transmission reliability.Image is pressed in real time
Contracting unit uses special compression chip ADV212, schemes according to ADV212 work characteristics and multichannel CCD
As output characteristic, use Custom mode of operation and frame Constructing Policy, many to realize monolithic ADV212 process
Channel C CD view data.Compressed bit stream stores in Large Copacity nand flash memory, in order to prevent memorizer
Single-particle inversion phenomenon occurs, uses RS error correction algorithm herein.Compressed bit stream finally use G level transmit
Scheme, greatly reduces transmission channel.Whole device use FPGA be primary processor, can with camera other
System carries out seamless link.
The space TDICCD camera image real-time Transmission of the present invention, compress and store device and include:
CCD each passage senior middle school low speed transmission unit, is used for transmitting CCD image-generating unit each passage output map picture
Data.Different according to each passage pixel transfering clock frequency, it is designed as low speed, middling speed and high-speed transfer system
System.Low speed transmissions system uses LVDS transmission (parallel clock frequency is less than 55MHz), and middling speed uses Camera
Link protocol transmission (parallel clock frequency is less than 80MHz), uses at a high speed G bit transfer (parallel clock
Frequency is more than 80MHz).In order to improve transmission reliability, devise the VLSI of the ECC algorithm of FEC error correction
Structure, carries out the most before transmission using ECC to encode, carries out ECC decoding during reception.Due to ECC
Algorithm uses FPGA to realize having little influence on transmission speed, is therefore especially suitable for the transmission of ccd image data.
Picture frame structural unit, is used for constructing the picture frame needed for compression chip.Generally CCD output channel number
Up to dozens of, if each passage is respectively adopted compression unit, compression necessarily takies ample resources.Therefore originally
Invention uses picture frame structural unit to be compressed in pipelined fashion by multichannel image, only with one
Compression unit just can process multi-channel data.
Compression parameters memorizer, is used for storing the coding parameter that compression chip normally works.The present invention uses RAM
Move strategy, during system electrification, compression parameters is moved in RAM, when compression is carried out then from RAM
Import in compression chip.It is far longer than from external memory storage owing to importing to the speed of compression chip from RAM
Importing to compression chip speed fast, therefore this strategy substantially increases compression chip allocative efficiency.
Compression chip controller, is used for controlling compression chip and normally working, arrange its coding parameter, storage,
Process interrupt event, receive the data of picture frame structural unit.Whole be designed with FPGA programming realization can
With with camera other system seamless link.
Compression chip array, is used for compressing image, and compression chip uses ADV212, and this chip have employed the world
State-of-the-art treatment technology, uses JPEG2000 compression algorithm, control to get up very convenient, and compression performance is high
In conventional compression algorithm.Maximum compression speed reaches 1M sample/s, can meet various CCD camera real
Time compression application.
Storage array controllers and error correcting encoder, be used for controlling massive store array real-time storage picture number
According to, control admittedly to deposit the operations such as erasing, read-write, bad block management, use pipelines strategy storage multichannel simultaneously
Ccd image data.In order to prevent owing to single-particle inversion makes memorizer occur upset to cause view data poor
Wrong.The present invention devises error correction strategies based on RS code, encodes before storing, examines after reading
Mistake and error correction, improve the reliability of view data storage.
The solid memory cell of Large Copacity, is used for storing compressed bit stream.Large Copacity deposits employing nand flash memory, NAND admittedly
Flash memory has that zero access, volume be little, low in energy consumption, light, antidetonation, shock resistance, temperature adaptation wide ranges,
Non-volatile, capacity is big, is especially suitable for space camera application.
Compressed bit stream transmission unit, is used for satellite data transmission system transfers compression of images code stream, and the present invention uses
High speed G level transmission strategy, available few transmission channel is transmitted each channel C CD compression of images code stream, can be subtracted
Transmit system complexity less.It addition, use RS code correction strategy before transmission, it is ensured that transmission reliability.
Combine accompanying drawing with specific embodiment below the present invention is described in further detail.
Fig. 1 shows the space TDICCD camera image real-time Transmission of the present invention, compresses and store the one of device
Plant detailed description of the invention.See Fig. 1, comprising: CCD each passage senior middle school low speed transmission unit 1, picture frame
Structural unit 2, compression parameters memorizer 3, compression chip controller 4, compression chip array 5, store battle array
Row controller and error correcting encoder 6, the solid memory cell 7 of Large Copacity, compressed bit stream transmission unit 8.
Specifically:
CCD each passage senior middle school low speed transmission unit 1, it is connected with camera CCD image-generating unit, including: low
Speed transmission unit, middling speed transmission unit and phase high-speed transfer unit and error correction ECC coding module.Each biography
Defeated unit includes host-host protocol and read-write control unit.
Picture frame structural unit 2 includes: include SDRAM init state machine, refresh operation state machine,
Data read states machine, data write state machine and the SDRAM of ping-pong operation.Being used for constructing size is M × N
Picture frame.
Compression parameters memorizer 3 includes: EEROM memorizer, I2C agreement read-write control unit and and
RAM.It is used for that compressed encoding parameter is imported to compression chip normally to work.
Compression chip controller 4 includes: ADV212 coding parameter, memorizer arrange state machine, view data
Input block, image buffer storage, compressed bit stream read unit etc..
Compression chip array 5 includes: include ADV212, chip configuration circuit and crystal oscillator.Many for compressing
Channel C CD view data.
Storage array controllers and error correcting encoder 6 include: flash memory read states machine, write state machine, erasing shape
State machine, bad-block managing unit and RS error correction encoding unit.
The solid memory cell 7 of Large Copacity includes: nand flash memory array and power supply unit.
Compressed bit stream transmission unit 8, it is connected with satellite transmission interface, including: G level transmission chip, transmission
Agreement, data transmission link are set up and error correction encoding unit.
Obviously, above-described embodiment is only for clearly demonstrating example, and not to embodiment
Limit.For those of ordinary skill in the field, can also be made it on the basis of the above description
The change of its multi-form or variation.Here without also cannot all of embodiment be given exhaustive.And by
What this was extended out obviously changes or changes among still in the protection domain of the invention.
Claims (1)
1. a space TDICCD camera image real-time Transmission, compress and store device, it is characterised in that
Including:
CCD each passage senior middle school's low speed transmission unit (1), including: low speed transmissions unit, middling speed transmission unit,
High-speed transfer unit and error correction ECC coding module；
Picture frame structural unit (2), being used for constructing size is M × N picture frame；
Compression parameters memorizer (3), is used for that compressed encoding parameter is imported to compression chip and normally works；
Compression chip controller (4), including: ADV212 coding parameter, memorizer arrange state machine, image
Data input cell, image buffer storage, compressed bit stream read unit；
Compression chip array (5), is used for compressing multichannel ccd image data；
Storage array controllers and error correcting encoder (6), including: flash memory read states machine, write state machine, wiping
Except state machine, bad-block managing unit and RS error correction encoding unit；
The solid memory cell (7) of Large Copacity, including: nand flash memory array and power supply unit；
Compressed bit stream transmission unit (8), including: G level transmission chip, host-host protocol, data transmission link are built
Stand and error correction encoding unit；
In described CCD each passage senior middle school's low speed transmission unit (1), described low speed transmissions unit, middling speed are transmitted
Unit, high-speed transfer unit, include host-host protocol and read-write control unit respectively；Described picture frame structure is single
Unit (2) including: SDRAM init state machine, refresh operation state machine, data read states machine, data
Write state machine and the SDRAM of ping-pong operation；Described compression parameters memorizer (3) including: EEROM deposits
Reservoir, I2C agreement read-write control unit and RAM；Described compression chip array (5) including: ADV212,
Chip configuration circuit and crystal oscillator.
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| CN201310356464.1A CN103428496B (en) | 2013-08-16 | 2013-08-16 | A kind of space TDICCD camera image real-time Transmission, compress and store device |
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| CN201310356464.1A CN103428496B (en) | 2013-08-16 | 2013-08-16 | A kind of space TDICCD camera image real-time Transmission, compress and store device |
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Cited By (1)
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| CN111741243A (en) * | 2020-06-23 | 2020-10-02 | 中国科学院长春光学精密机械与物理研究所 | Non-uniform correction method for TDICMOS detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103986869A (en) * | 2014-05-22 | 2014-08-13 | 中国科学院长春光学精密机械与物理研究所 | Image collecting and displaying device of high-speed TDICCD remote sensing camera |
| CN104038316B (en) * | 2014-06-06 | 2017-06-09 | 中国科学院长春光学精密机械与物理研究所 | The highly reliable timeliness asynchronous serial communication method high of space camera |
| CN106231224A (en) * | 2016-07-29 | 2016-12-14 | 中国科学院长春光学精密机械与物理研究所 | A kind of integrated image processing system for video moonlet load |
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| CN103179396A (en) * | 2013-03-04 | 2013-06-26 | 中国科学院长春光学精密机械与物理研究所 | System and method for controlling CCSDS (consultative committee for space data system) image compressing code in spatial TDICCD (time delayed integration charge coupled device) camera application |
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| CN102868885A (en) * | 2012-08-27 | 2013-01-09 | 中国科学院长春光学精密机械与物理研究所 | Compressive-sensing-based on-satellite real-time image synthesis compression system |
| CN103179396A (en) * | 2013-03-04 | 2013-06-26 | 中国科学院长春光学精密机械与物理研究所 | System and method for controlling CCSDS (consultative committee for space data system) image compressing code in spatial TDICCD (time delayed integration charge coupled device) camera application |
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