CN109660746A - A kind of MIPI signal distance transmitting device and method - Google Patents
A kind of MIPI signal distance transmitting device and method Download PDFInfo
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- CN109660746A CN109660746A CN201811459648.XA CN201811459648A CN109660746A CN 109660746 A CN109660746 A CN 109660746A CN 201811459648 A CN201811459648 A CN 201811459648A CN 109660746 A CN109660746 A CN 109660746A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
- H04N5/77—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
Abstract
The purpose of the application is to provide a kind of MIPI signal distance transmitting device and method, which includes: AM access module, parsing module, receives monitoring modular, clock processing module, data processing module and sending module；The AM access module is for accessing the first level signal and second electrical level signal；The clock processing module is used to carry out shaping to the clock signal of MIPI interface and extracts fractional frequency signal；First level signal that monitoring modular is received for accessing the AM access module is handled, and obtains synchronization signal；The parsing module is used to carry out dissection process according to the second electrical level signal that the synchronization signal that the reception monitoring modular obtains accesses the AM access module, obtains video stream data；The data processing module is used to be transmitted to the sending module after carrying out respective handling to the video stream data, is sent for the sending module.To reduce front end related circuit area, reduces cost and promote transmission range.
Description
Technical field
This application involves field of signal transmissions more particularly to a kind of MIPI signal distance transmitting device and methods.
Background technique
Current high definition CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxide half
Conductor) interface of image sensor (be higher than 720p) generally uses MIPI (Mobile Industry Processor
Interface, mobile industry processor interface alliance) CSI-2 (Camera Serial Interface Version 2, camera shooting
The head serial line interface second edition) high-speed serial signals transmission standard or DVP (DigitalVideoPort, digital visual interface) mark
It is quasi-.DVP interface standard is not suitable for endoscope etc. and needs distant signal transmission, serial MIPI since signal wire quantity is more
Interface standard is at most suitable selection.However, since MIPI uses D-PHY physical layer standard, signal under high-speed mode
Amplitude only 200mV, the +/- 100mV of the amplitude of oscillation, and use DDR (DualDataRate, double data rate) transmission data, including
Signal integrity performance of the signal rise and fall including characteristic is very big to function effect.The standard provides the differential pair flight time
For 2ns.It is recommended that the maximum wiring on general PCB (Printed Circuit Board, printed circuit board) soft board or hardboard
Length is 25-30cm.However, video image data need to be transferred at the image other than 3-4 meters in general endoscopic applications
It manages in device.The extension transmission method of MIPI CSI-2 signal is most important to its endoscopic applications.
Currently, the scheme for solving this problem is divided into following a few classes: first is directly to extend transmission distance；Second is conversion
It is transmitted at optical signal；Third is that MIPICSI-2 signal is converted into DVP or LVDS (Low- using special chip
Voltage Differential Signaling, Low Voltage Differential Signal) signal.
The first scheme is by optimization transmission medium, reduction loss of signal, to directly transmit MIPI CSI-2 signal
Distance extends to 3-4 meters.This scheme is verified to be feasible for certain high definition cmos sensors.But due to MIPI
CSI-2 specification itself suggest maximum length of arrangement wire be 25-30cm, for other high definition sensors MIPI CSI-2 signal without
Method ensures to extend transmission distance in this way.Allow to successfully realize the CMOS chip for extending transmission, due to
The not guaranteed transmission range performance in addition to MIPI specification of CMOS chip manufacturer, it cannot be guaranteed that the chip of later batch is still
Same transmission characteristic can be possessed.
The method that second scheme introduces optical transport successfully extends transmission range, generally public using Silicon Line
The solution of department.But the introducing of optical fiber and electric light, photoelectric conversion will be so that entire scheme high expensives, and are unfavorable for
Miniaturization.
In the third scheme, it is (3.1*3.1mm) bigger than normal that MIPI CSI-2 is converted to the ready-made special chip volume of LVDS, and
And each differential pair is required with a chip, it, will be so that head-end circuit becomes bigger than normal, no if be applied in endoscopic applications
Conducive to the Miniaturization Design of endoscope head end.The scheme that MIPI CSI-2 is converted into DVP then makes transmission data wire number excessive,
It is unfavorable for the reduction of endoscope main flexible tube diameter and the simplification of assemble welding.
Summary of the invention
The purpose of the application is to provide a kind of MIPI signal distance transmitting device and method, and solution passes in the prior art
Cost when defeated poor reliability, circuit volume are unfavorable for greatly very much miniaturization, the video image in endoscopic applications transmits at a distance
High problem.
According to the one aspect of the application, a kind of MIPI signal distance transmitting device is provided, which includes:
AM access module, receives monitoring modular, clock processing module, data processing module and sending module at parsing module；·
The AM access module is for accessing the first level signal and second electrical level signal；
The clock processing module is used to carry out shaping to the clock signal of MIPI interface and extracts fractional frequency signal, and will
Clock signal and fractional frequency signal correspondence after shaping are provided to each module in the transmitting device；
First level signal that monitoring modular is received for accessing the AM access module is handled, and is synchronized
Signal；
The parsing module is used to be accessed the AM access module according to the synchronization signal that the reception monitoring modular obtains
Second electrical level signal carry out dissection process, obtain video stream data；
The data processing module is used to be transmitted to the sending module after carrying out respective handling to the video stream data,
It is sent for the sending module.
Further, the synchronization signal include: capable synchronization, frame synchronization, data effectively and error message.
Further, the synchronization signal that the parsing module is used to be obtained according to the reception monitoring modular is to the access
Field in the second electrical level signal of module access is parsed, and is obtained in second electrical level signal according to the result of parsing is synchronous
Video stream data.
Further, the video stream data includes the long packet of video stream data, command information and the short packet of status data.
Further, the data processing module includes extracting cache module, compression module and caching recombination module,
The extraction cache module is cached for the video stream data that the parsing module exports to be extracted and cached
Data afterwards are transmitted to the compression module to be compressed；
The caching recombination module is for recombinating the compressed data of the compression module, so that the transmission mould
Block sends the data after recombination.
Further, the extraction cache module is used to extract the parsing module according to segmentation pushup storage defeated
Video stream data out, and cached according to preset capacity.
Further, the compression module is used for according to difference mode between pixel to having cached in the extraction cache module
Data carry out compression processing compressed each pixel value is transmitted with the compressed each pixel value of determination.
Further, the fractional frequency signal that the caching recombination module is used to be extracted according to the clock processing module is to described
Compressed data carry out reassembling into preset data form in compression module.
Further, the transmitting device includes frequency synthesis module, for according to the video pressure in the compression module
Preset data form in demagnification rate and the caching recombination module is by the clock signal in the clock processing module according to pre-
If ratio synthesizes new frequency signal, the new frequency signal is provided to the sending module to drive the sending module to send out
Send data.
According to the application another aspect, a kind of MIPI signal distance transmission method is additionally provided, this method comprises:
It is handled according to the first level signal that clock signal will acquire, obtains synchronization signal, wherein the synchronization
Signal include row synchronization, frame synchronization, data effectively and error message；
Dissection process is carried out according to the second electrical level signal that the synchronization signal will acquire, obtains video stream data；
The video stream data is performed corresponding processing, and video stream data is sent by treated, wherein institute
Stating corresponding processing includes caching, compression and caching recombination.
Further, the video stream data is performed corresponding processing, comprising:
The video stream data is extracted according to segmentation pushup storage, and is cached according to preset capacity, is obtained
Data after caching；
Compression processing is carried out to the data after the caching according to difference mode between pixel, with the compressed each picture of determination
Element value, compressed each pixel value is transmitted；
Compressed each pixel value is carried out reassembling into preset data form.
Further, compression processing is carried out to the data after the caching according to difference mode between pixel, comprising:
Every 16 pixels of colleague and every 16 row at same frame are defined as one group of RGB initial value；
Compression processing is carried out to the data after the caching according to difference mode between pixel and the RGB initial value.
Further, by treated, video stream data is sent, comprising:
It will according to the preset data form of the video compress multiplying power of the compression process and the caching regrouping process
The clock signal of access synthesizes new frequency signal according to preset ratio；
According to the new frequency signal, by treated, video stream data is sent.
Compared with prior art, the application provides a kind of MIPI signal distance transmitting device, which includes: access
Module, receives monitoring modular, clock processing module, data processing module and sending module at parsing module；The AM access module is used
In the first level signal of access and second electrical level signal；The clock processing module is used to carry out the clock signal of MIPI interface
Shaping and extract fractional frequency signal, and by after shaping clock signal and the fractional frequency signal correspondence be provided to the transmitting device
In each module；First level signal that monitoring modular is received for accessing the AM access module is handled, and is obtained same
Walk signal；What the parsing module was used to be accessed the AM access module according to the synchronization signal that the reception monitoring modular obtains
Second electrical level signal carries out dissection process, obtains video stream data；The data processing module is used for the video stream data
It is transmitted to the sending module after carrying out respective handling, is sent for the sending module.Further, by according to clock
The first level signal that signal will acquire is handled, and synchronization signal is obtained, wherein the synchronization signal include row it is synchronous,
Frame synchronization, data effectively and error message；Dissection process is carried out according to the second electrical level signal that the synchronization signal will acquire,
Obtain video stream data；The video stream data is performed corresponding processing, and video stream data is sent by treated,
Wherein, corresponding processing includes caching, compression and caching recombination.To reduce front end related circuit area, cost is reduced
And promote transmission range.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 shows a kind of MIPI signal distance transmitting device structural schematic diagram provided according to the one aspect of the application；
Fig. 2 shows the structural schematic diagrams of MIPI CSI-2 signal distance transmitting device in one embodiment of the application；
Fig. 3 shows the schematic diagram of difference between data buffer storage and pixel in one embodiment of the application；
Fig. 4 shows a kind of MIPI signal distance transmission method flow diagram provided according to the application another aspect.
The same or similar appended drawing reference represents the same or similar component in attached drawing.
Specific embodiment
The application is described in further detail with reference to the accompanying drawing.
Fig. 1 shows a kind of MIPI signal distance transmitting device structural schematic diagram provided according to the one aspect of the application,
The transmitting device includes: AM access module 1, receives monitoring modular 2, parsing module 3, clock processing module 4, data processing module 5
And sending module 6；The AM access module 1 is for accessing the first level signal and second electrical level signal；The clock processing module 4
For to MIPI interface clock signal carry out shaping and extract fractional frequency signal, and by after shaping clock signal and described point
Frequency signal correspondence is provided to each module in the transmitting device；The reception monitoring modular 2 is for accessing the AM access module
The first level signal handled, obtain synchronization signal；The parsing module 3 is used to be obtained according to the reception monitoring modular 2
To the synchronization signal second electrical level signal that accesses the AM access module 1 carry out dissection process, obtain video stream data；It is described
Data processing module 5 is used to be transmitted to the sending module 6 after carrying out respective handling to the video stream data, for the transmission
Module 6 carries out video data transmission.Here, MIPI signal distance is transmitted as long distance transmission, MIPI signal distance transmitting device
It can be applied in endoscope and disposable endoscope, be used for video image Distance Transmission.The AM access module 1 is for accessing image
The signal of the interface of sensor, wherein the interface of image sensor can use MIPI CSI-2 (Camera Serial
Interface Version2, the camera serial line interface second edition) standard interface, which works alternatively (HS) and low in high speed
Under power consumption (LP) mode, level standard is different on signal wire under two modes.In one embodiment of the application, the first level is low
Power consumption (LP) signal, second electrical level are high speed (HS) signal；Two kinds of varying level letters of HS and LP are supported while being accessed in AM access module 1
Number, receiving monitoring modular 2 is that low-power consumption mode receives monitoring modular, and parsing module 3 is high-speed mode data resolution module, clock
Processing module 4 is Clock Extraction/phase-locked loop module.Clock Extraction/phase-locked loop module provides benchmark for module each in transmitting device
Clock signal, LP level signal are received the clock that monitoring modular is provided according to Clock Extraction/phase-locked loop module by low-power consumption mode
Information is handled, and synchronization signal is exported；HS level signal is received by high-speed mode data resolution module according to low-power consumption mode
The synchronization signal that monitoring modular provides is handled, outputting video streams data.The video stream data that data processing module 5 will obtain
The corresponding processing for extracting the processes such as caching, compression and caching recombination is carried out, to obtain the transmission data for meeting transmission conditions,
It is sent for sending module 6.
In one embodiment of the application, the synchronization signal include: capable synchronization, frame synchronization, data effectively and error message.
Here, receiving the synchronization signal that monitoring modular 2 obtains it is used to that parsing module 3 to be instructed to obtain corresponding vision signal frame synchronization and row
Synchronization signal, and high-speed video data stream is extracted on this basis.It is right due to the unidirectional transmission property of MIPI CSI-2
In specific application, it is thus only necessary to the complete or collected works without realizing LP agreement will be met to the useful area protocol in rear end, in this Shen
Please be in embodiment, clock is in continuous duty rather than discontinuous working condition always.
Further, the synchronization signal that the parsing module is used to be obtained according to the reception monitoring modular is to the access
Field in the second electrical level signal of module access is parsed, and is obtained in second electrical level signal according to the result of parsing is synchronous
Video stream data.Here, parsing module 3 is told in video data stream based on the synchronization signal combination that monitoring modular 2 obtains is received
Synchronizing information, the various fields for telling video stream data are parsed, to obtain accurate video stream data, wherein
The field includes synchronizing short packet, yuv data, RGB data, RAW data, self-defining data etc.；The video stream data includes
The long packet of video stream data, command information and the short packet of status data；The long packet of video stream data for caching, compressing and subsequent forwarding,
Instruction and the acquisition of state data packets for understanding the working condition of current image sensor, such as normal work, blanking area,
Low-power consumption module, shutdown mode etc., to take corresponding treatment measures.
In one embodiment of the application, the data processing module 5 includes extracting cache module 51, compression module 52 and delaying
Recombination module 53 is deposited, the video stream data for extracting cache module 51 for exporting to the parsing module 3 extracts simultaneously
It caches, the data after caching are transmitted to the compression module 52 to be compressed；The caching recombination module 53 is used for will be described
The compressed data of compression module 52 are recombinated, so that the sending module 6 sends the data after recombination.Such as Fig. 2
Shown, the extraction cache module 51 is that video data stream extracts cache module, the video data that data resolution module is exported
Stream carries out low capacity caching, realizes the simple compression to video data, while guaranteeing the real-time processing and transmission of video data.Pressure
Contracting module 52 is video data lossless compression modules, carries out compression processing to the video data after cache module 51 caches is extracted,
Facilitate the data format for receiving and handling reassemble into recipient by caching recombination module 53.
Specifically, the extraction cache module is used to extract the parsing mould according to segmentation FIFO (pushup storage)
The video stream data of block output, and cached according to preset capacity.In one embodiment of the application, 51 base of cache module is extracted
Video cache is carried out in segmentation FIFO, by buffer memory capacity control within 3 row video datas, realizes simple video compress.Institute
Compression module 52 is stated for compressing according to difference mode between pixel to the data cached in the extraction cache module 51
Processing, with the compressed each pixel value of determination, compressed each pixel value is transmitted.Difference mode is to incite somebody to action between pixel
The same color pixel closed on subtracts each other, and the part for being only left difference is transmitted.It, can be according in one preferred embodiment of the application
RGB, which puts in order, to carry out correspondence and subtracts each other, and the pixel value difference after subtracting each other puts in order constant, as shown in Figure 3 data buffer storage and picture
The schematic diagram of difference between element.Original 10bit pixel is compressed into 8bit and transmitted by this example, to reduce error iteration, Ke Yi
Every 16 pixels of colleague and every 16 row at same frame define one group of RGB initial value, whenever encountering RGB initial value and the phase of previous pixel
Subtracting just terminates, again using current initial value as the benchmark of later pixel difference.It can by difference mode between pixel described herein
It is preferably answered with the compression for reaching data volume with very small caching cost and delay to reduce video data clock frequency
For supporting farther transmission range in the video image Distance Transmission of endoscope.
Specifically, the fractional frequency signal that the caching recombination module 53 is used to be extracted according to the clock processing module 4 is to institute
Compressed data in compression module 52 are stated to carry out reassembling into preset data form.Here, clock processing module 4 extracts MIPI
The video clock of CSI-2 interface, supply receives monitoring modular 2, parsing module 3, extracts cache module 51 and pressure after Shape correction
Contracting module 52 uses, wherein Shape correction is to be shortened the rising edge of clock, failing edge by retriggered, to make subsequent
Digital circuit latch it is more acurrate, reduce the bit error rate.In addition, clock processing module 4 also generates 0.8 overtones band by phaselocked loop,
It is supplied to caching recombination module 53, the clock reference as the video data output handled.Recombination module 53 is cached according to certainly
Definition format caches the video data stream handled well with FIFO, and according to 0.8 times of dominant frequency in a manner of double data rate (DDR) into
Row output, user-defined format include the format that frame synchronization is synchronous with row in MIPI CSI-2, while including to the specific of RGB initial value
Label, to facilitate recipient to handle.
Continue to connect above-described embodiment, the transmitting device includes frequency synthesis module 7, for according to the compression module 52
In video compress multiplying power and it is described caching recombination module 53 in preset data form by the clock processing module 4 when
Clock signal synthesizes new frequency signal according to preset ratio, and the new frequency signal is provided to the sending module 6 to drive
The sending module 6 sends data.Here, frequency synthesis module 7 will be led according to video compress multiplying power and user-defined format attribute
Frequency synthesizes new lower frequency (such as 0.8 frequency multiplication) according to a certain percentage, for driving the data to be transmitted, such as low voltage difference
The transmission of sub-signal (LVDS) data drives.Sending module 6 can be the LVDS sending module for being suitble to endoscopic applications, will handle
Complete data and clock are sent with LVDS level standard by ddr mode.
Fig. 4 shows a kind of MIPI signal distance transmission method flow diagram provided according to the application another aspect,
This method comprises: step S11~step S13, wherein in step s 11, believed according to the first level that clock signal will acquire
Number handled, obtain synchronization signal, wherein the synchronization signal include row synchronization, frame synchronization, data effectively and mistake letter
Breath；In step s 12, dissection process is carried out according to the second electrical level signal that the synchronization signal will acquire, obtains video flowing
Data；In step s 13, the video stream data is performed corresponding processing, and video stream data is sent out by treated
It send, wherein corresponding processing includes caching, compression and caching recombination.To provide video image long distance for endoscope
Transmission method from transmission, transmission reliability is higher and reduces cost.
Here, the first level is low-power consumption (LP) signal, second electrical level is high speed (HS) signal；According to clock signal by LP
Signal is handled, obtained synchronization signal, is parsed to the field in the second electrical level signal of access, according to the knot of parsing
The synchronous video stream data obtained in second electrical level signal of fruit；And then caching, compression and caching are extracted to video stream data
Recombination facilitates transmission and recipient's reception to handle with determination data to be transmitted.
Specifically, in step s 13, the video stream data is extracted according to segmentation pushup storage, and according to pre-
Data if capacity is cached, after being cached；The data after the caching are compressed according to difference mode between pixel
Processing, with the compressed each pixel value of determination, compressed each pixel value is transmitted；To described compressed each
Pixel value carries out reassembling into preset data form.Here, video cache is carried out based on segmentation FIFO (pushup storage), it will
Buffer memory capacity controls within 3 row video datas, realizes simple video compress.Difference mode is homochromy by what is closed between pixel
Pixel is subtracted each other, and the part for being only left difference is transmitted.Further, in step s 13, by every 16 pixels of colleague and together
Every 16 row of frame is defined as one group of RGB initial value；
Compression processing is carried out to the data after the caching according to difference mode between pixel and the RGB initial value.At this
Apply in a preferred embodiment, can put in order correspond to according to RGB and subtract each other, the pixel value difference after subtracting each other puts in order not
Become.To reduce error iteration, one group of RGB initial value, Mei Dangyu can be defined in every 16 pixels of colleague and every 16 row at same frame
Just terminate when to RGB initial value with subtracting each other for previous pixel, again using current initial value as the benchmark of subsequent differences.Pass through the application institute
Difference mode can reach the compression of data volume between the pixel stated with very small caching cost and delay, to reduce video counts
It according to clock frequency, is preferably applied in the video image Distance Transmission of endoscope, supports farther transmission range.
Here, above steps depends on clock reference signal, which is carried out by clock processing module
Shape correction and determine fractional frequency signal, Shape correction be by set out again by the rising edge of clock, failing edge shortening, thus
It latches subsequent digital circuit more acurrate, reduces the bit error rate.In addition, by phaselocked loop generate 0.8 overtones band, as it is subsequent into
The clock reference of the video data output handled in row caching regrouping process.The video that will be handled well according to user-defined format
Data flow is cached with FIFO, and is exported in a manner of double data rate (DDR) according to 0.8 times of dominant frequency, and preset data lattice are obtained
Formula, wherein preset data form is the data format for meeting recipient and receiving processing, and user-defined format can be MIPI CSI-2
The middle frame synchronization format synchronous with row, while specific markers are carried out to RGB initial value, to facilitate recipient to handle.
In one embodiment of the application, will treated when video stream data sent, can be according to the compression at
The video compress multiplying power of reason process and the preset data form of the caching regrouping process are by the clock signal of access according to default
Ratio synthesizes new frequency signal；According to the new frequency signal, by treated, video stream data is sent.Here, according to
Dominant frequency is synthesized (such as 0.8 times of new lower frequency by video compress multiplying power and user-defined format attribute according to a certain percentage
Frequently), for driving the data to be transmitted, such as the transmission driving of Low Voltage Differential Signal (LVDS) data, the data that will have been handled
It is sent with LVDS level standard by ddr mode with clock.
By MIPI signal distance transmitting device described herein and method, front end related circuit area can be reduced,
Cost is reduced, and promotes transmission range, MIPI CSI-2 is at high cost applied to endoscope bring, passes to efficiently solve
It is defeated apart from it is small the problems such as.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the application to the application
Mind and range.In this way, if these modifications and variations of the application belong to the range of the claim of this application and its equivalent technologies
Within, then the application is also intended to include these modifications and variations.
It should be noted that the application can be carried out in the assembly of software and/or software and hardware, for example, can adopt
With specific integrated circuit (ASIC), general purpose computer or any other realized similar to hardware device.In one embodiment
In, the software program of the application can be executed to implement the above steps or functions by processor.Similarly, the application
Software program (including relevant data structure) can be stored in computer readable recording medium, for example, RAM memory,
Magnetic or optical driver or floppy disc and similar devices.In addition, hardware can be used to realize in some steps or function of the application, example
Such as, as the circuit cooperated with processor thereby executing each step or function.
In addition, a part of the application can be applied to computer program product, such as computer program instructions, when its quilt
When computer executes, by the operation of the computer, it can call or provide according to the present processes and/or technical solution.
And the program instruction of the present processes is called, it is possibly stored in fixed or moveable recording medium, and/or pass through
Broadcast or the data flow in other signal-bearing mediums and transmitted, and/or be stored according to described program instruction operation
In the working storage of computer equipment.Here, including a device according to one embodiment of the application, which includes using
Memory in storage computer program instructions and processor for executing program instructions, wherein when the computer program refers to
When enabling by processor execution, method and/or skill of the device operation based on aforementioned multiple embodiments according to the application are triggered
Art scheme.
It is obvious to a person skilled in the art that the application is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case where without departing substantially from spirit herein or essential characteristic, the application can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and scope of the present application is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included in the application.Any reference signs in the claims should not be construed as limiting the involved claims.This
Outside, it is clear that one word of " comprising " does not exclude other units or steps, and odd number is not excluded for plural number.That states in device claim is multiple
Unit or device can also be implemented through software or hardware by a unit or device.The first, the second equal words are used to table
Show title, and does not indicate any particular order.
Claims (13)
1. a kind of MIPI signal distance transmitting device, which is characterized in that the transmitting device includes:
AM access module, receives monitoring modular, clock processing module, data processing module and sending module at parsing module；·
The AM access module is for accessing the first level signal and second electrical level signal；
The clock processing module is used to carry out the clock signal of MIPI interface shaping and extracts fractional frequency signal, and by shaping
Clock signal and fractional frequency signal correspondence afterwards is provided to each module in the transmitting device；
First level signal that monitoring modular is received for accessing the AM access module is handled, and obtains synchronous letter
Number；
The parsing module be used to be accessed the AM access module according to the obtained synchronization signal of reception monitoring modular the
Two level signals carry out dissection process, obtain video stream data；
The data processing module is used to be transmitted to the sending module after carrying out respective handling to the video stream data, for institute
Sending module is stated to be sent.
2. transmitting device according to claim 1, which is characterized in that the synchronization signal include: capable synchronization, frame synchronization,
Data effectively and error message.
3. transmitting device according to claim 1, which is characterized in that the parsing module is used to be monitored according to the reception
The field in second electrical level signal that the synchronization signal that module obtains accesses the AM access module parses, according to parsing
As a result the synchronous video stream data obtained in second electrical level signal.
4. transmitting device according to claim 3, which is characterized in that the video stream data includes that video stream data is long
Packet, command information and the short packet of status data.
5. transmitting device according to claim 1, which is characterized in that the data processing module includes extracting caching mould
Block, compression module and caching recombination module,
The extraction cache module is for extracting and caching to the video stream data that the parsing module exports, after caching
Data are transmitted to the compression module to be compressed；
The caching recombination module is for recombinating the compressed data of the compression module, so that the sending module will
Data after recombination are sent.
6. transmitting device according to claim 5, which is characterized in that the extraction cache module is used to first be entered according to segmentation
First go out memory and extract the video stream data of the parsing module output, and is cached according to preset capacity.
7. transmitting device according to claim 5, which is characterized in that the compression module is used for according to difference side between pixel
Formula carries out compression processing to the data cached in the extraction cache module will be pressed with the compressed each pixel value of determination
Each pixel value after contracting is transmitted.
8. transmitting device according to claim 5, which is characterized in that the caching recombination module is used for according to the clock
The fractional frequency signal that processing module is extracted carries out reassembling into preset data form to compressed data in the compression module.
9. the transmitting device according to any one of claim 5 to 8, which is characterized in that the transmitting device includes frequency
Synthesis module, for according to the video compress multiplying power in the compression module and the preset data lattice in the caching recombination module
Clock signal in the clock processing module is synthesized new frequency signal according to preset ratio by formula, by the new frequency signal
The sending module is provided to drive the sending module to send data.
10. a kind of MIPI signal distance transmission method, which is characterized in that the described method includes:
It is handled according to the first level signal that clock signal will acquire, obtains synchronization signal, wherein the synchronization signal
Including row synchronization, frame synchronization, data effectively and error message；
Dissection process is carried out according to the second electrical level signal that the synchronization signal will acquire, obtains video stream data；
The video stream data is performed corresponding processing, and video stream data is sent by treated, wherein the phase
The processing answered includes caching, compression and caching recombination.
11. according to the method described in claim 10, wherein, being performed corresponding processing to the video stream data, comprising:
The video stream data is extracted according to segmentation pushup storage, and is cached according to preset capacity, is cached
Data afterwards；
Compression processing is carried out to the data after the caching according to difference mode between pixel, with the compressed each pixel of determination
Value, compressed each pixel value is transmitted；
Compressed each pixel value is carried out reassembling into preset data form.
12. according to the method for claim 11, which is characterized in that according to difference mode between pixel to the number after the caching
According to progress compression processing, comprising:
Every 16 pixels of colleague and every 16 row at same frame are defined as one group of RGB initial value；
Compression processing is carried out to the data after the caching according to difference mode between pixel and the RGB initial value.
13. according to the method for claim 11, which is characterized in that by treated, video stream data is sent, comprising:
It will be accessed according to the preset data form of the video compress multiplying power of the compression process and the caching regrouping process
Clock signal synthesize new frequency signal according to preset ratio；
According to the new frequency signal, by treated, video stream data is sent.
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