CN105405375A - MIPI video signal single path-to-multipath conversion device and MIPI video signal single path-to-multipath conversion method - Google Patents
MIPI video signal single path-to-multipath conversion device and MIPI video signal single path-to-multipath conversion method Download PDFInfo
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Abstract
The invention discloses a MIPI video signal single path-to-multipath conversion device and a MIPI video signal single path-to-multipath conversion method. The above mentioned device comprises a MIPI video signal input interface, a MIPI video control signal input interface, and a plurality of MIPI video signal output interfaces; a MIPI video decoding module, a MIPI protocol module, an RGB image resolution ratio detection module, an RGB image data caching module, and a plurality of MIPI video output modules, which are fixedly disposed in a programmable logic device. Based on the above mentioned device, the MIPI video signal single path-to-multipath conversion method is characterized in that the MIPI image timing sequence can be rebuilt on the local MIPI video output modules according to the input single MIPI video signal, and the multipath MIPI image data can be output from the local MIPI video output modules to the module group to be tested according to the above mentioned timing sequence, and in addition, the signal spreading function of converting the MIPI video signals from the single path to the multipath can be realized; the method is suitable for the verification of the large and medium scale module group; because the MIPI video output modules are parallel and independent, the MIPI video signals can be output independently at the same time, and therefore the method is suitable for the simultaneous screen-lightening verification of a plurality of module groups having the same resolution ratio and different characteristics in different working environments.
Description
Technical field
The invention belongs to signal processing technology field, more specifically, relate to the device and method that a kind of MIPI vision signal single channel turns multichannel.
Background technology
MIPI liquid crystal module has been widely used in various display device, has wide in variety, complete in specifications, cheap advantage; Each module manufacturer is also at the various MIPI module of large-scale production.Along with the increase of MIPI liquid crystal module demand, for ensureing MIPI liquid crystal module quality, particularly important to the testing authentication of MIPI liquid crystal module.
Need to use image signal source to be supplied to MIPI liquid crystal module to produce benchmark image to the testing authentication of MIPI liquid crystal module, and an existing image signal source often can only supply a small amount of several tested MIPI liquid crystal module; Large-scale MIPI liquid crystal module test needs great amount of images signal source, and image signal source is with high costs, and cannot realize testing the MIPI liquid crystal module of different qualities under multiple test environment, cause that the production efficiency of testing authentication reduces, production cost is high. simultaneously
For this reason, need a kind of MIPI vision signal expansion scheme, the MIPI vision signal that can provide according to the image signal source of input, generate the identical MIPI vision signal of multichannel and supply the detection of large-scale MIPI liquid crystal module as image signal source; Under being used in different test environments, the checking of same time point screen is carried out to the module of different qualities.
Summary of the invention
For above defect or the Improvement requirement of prior art, the invention provides the device and method that a kind of MIPI vision signal single channel turns multichannel, its object is to expansion MIPI video signal source.
For achieving the above object, according to one aspect of the present invention, provide the device that a kind of MIPI vision signal single channel turns multichannel, comprise a MIPI video signal input interface, MIPI video control signal input interface, a multiple MIPI video signal output interface, and solidify MIPI Video decoding module, MIPI protocol module, RGB image resolution ratio detection module, rgb image data cache module, multiple MIPI Video Output Modules in a programmable logic device (PLD); This programmable logic device (PLD) has the MIPI video signal input terminal coupling above-mentioned MIPI video signal input interface, the MIPI video control signal input terminal coupling above-mentioned MIPI video control signal input interface and couples multiple MIPI video signal output terminals of above-mentioned multiple MIPI video signal output interface one by one;
Wherein, MIPI protocol module is connected with MIPI Video decoding module, MIPI Video decoding module is connected with RGB image resolution ratio detection module and rgb image data cache module, and RGB image resolution ratio detection module is connected with each MIPI Video Output Modules with rgb image data cache module; Each MIPI Video Output Modules is parallel independent, noiseless each other, and can respective independent parameters;
MIPI Video decoding module couples described MIPI video signal input interface by MIPI video signal input terminal, and MIPI protocol module and each MIPI Video Output Modules all couple described video control signal input interface by MIPI video control signal input terminal; Each MIPI Video Output Modules has multiple link (Lane) MIPI VT, each link MIPI VT couples MIPI video signal output interface by MIPI video signal output terminal, by MIPI video signal output interface MIPI vision signal is sent to the MIPI liquid crystal module to be measured in respective channel.
Preferably, above-mentioned MIPI vision signal single channel turns the device of multichannel, also comprises human-machine interface module; Human-machine interface module has outside display interface and external command input interface; This human-computer interaction module is used for generating MIPI video control signal according to external command, is sent to MIPI protocol module and each MIPI Video Output Modules by MIPI video control signal input terminal; Also for the status information of whole device is exported by outside display interface.
Preferably, above-mentioned MIPI vision signal single channel turns the device of multichannel, also comprises MIPI video reception module; This MIPI video reception module is solidified in above-mentioned programmable logic device (PLD), its first end couples described MIPI video signal input interface by described MIPI video signal input terminal, second end connects above-mentioned human-computer interaction module by above-mentioned MIPI video control signal input terminal, and the 3rd end is connected with above-mentioned MIPI Video decoding module; MIPI video reception module be used for the MIPI vision signal received from image signal source is electrically adjusted, time delay adjust and demodulation process, obtain the parallel demodulation data of each Lane.
Preferably, above-mentioned MIPI vision signal single channel turns the device of multichannel, and its MIPI video reception module comprises reception matching module, electrically rebuilds module, time delay alignment module and demodulation module;
Wherein, receive matching module and electrically rebuild model calling, electric rebuild module and be connected with time delay alignment module, time delay alignment module is connected with demodulation module; Receive the input end of matching module as the first end of MIPI video reception module, the output terminal of demodulation module is as the 3rd end of MIPI video reception module; Receive matching module control end, electrically rebuild the control end of module control end, time delay alignment module control end and demodulation module side by side as the second end of MIPI video reception module;
Wherein, receive matching module to be used for being terminated and impedance matching to the MIPI vision signal of reception; Electric reconstruction module is used for adjudicating according to electrical standard the output signal receiving matching module and living again, and obtains the MIPI signal with standard electrical characteristic; Time delay alignment module, for the clock signal of each LaneMIPI signal inside of aliging and data-signal, makes between the data-signal of each Lane inside, aligns between data-signal and clock signal; The data-signal that demodulation module adopts the clock signal of each Lane parallel to each is sampled and demodulation, obtains the parallel demodulation bus data of each Lane.
Preferably, above-mentioned reception matching module comprises multiple reception matched sub-block, and electrically reconstruction module comprises multiple electric reconstruction submodule, time delay alignment module comprises multiple time delay alignment submodule, demodulation module comprises multiple demodulation submodule; Receive matched sub-block, electrically rebuild submodule, time delay alignment submodule is identical with the number of demodulation submodule.
Preferably, above-mentioned each demodulation submodule has self-calibration function, can carry out self calibration, clock can correctly be sampled and each data-signal of demodulation, the error avoiding external environmental interference to cause and drift according to the alignment time interval arranged; When the interval of calibration of the demodulation submodule that the interference of certain Lane is more serious, this Lane is corresponding arranges shorter, to improve the reliability of demodulation operation.
Preferably, above-mentioned each MIPI Video Output Modules all can separate configurations MIPI video coding parameter and transformation parameter; According to a road MIPI vision signal of input, the multichannel MIPI vision signal with different qualities can be generated; Can be used for supplying simultaneously and multiplely there is equal resolution and there is the MIPI liquid crystal module of different display characteristic.
Preferably, above-mentioned MIPI vision signal single channel turns the device of multichannel, and its MIPI Video Output Modules comprises local image sequence generation module, output channel view data cache module, RGB image generating module, MIPI vision signal LP (LowPower) modular converter, MIPI vision signal HS (HighSpeed) modular converter, MIPI time delay adjusting module and MIPI signal driver module;
Wherein, local image sequence generation module is all connected with RGB image generating module with output channel view data cache module, and RGB image generating module is connected with MIPI vision signal LP modular converter and MIPI vision signal HS modular converter; MIPI vision signal LP modular converter is all connected with MIPI time delay adjusting module with MIPI vision signal HS modular converter, and MIPI time delay adjusting module is connected with MIPI signal driver module; The input end of local image sequence generation module, as the second end of MIPI Video Output Modules, connects RGB image resolution ratio detection module; The input end of output channel view data cache module, as the 3rd end of MIPI Video Output Modules, connects rgb image data cache module; The output terminal of MIPI signal driver module is as the MIPI VT of MIPI Video Output Modules;
Wherein, local image sequence generation module is for obtaining the some screen clock signal of MIPI liquid crystal module to be measured in respective channel according to the resolution of benchmark image and MIPI liquid crystal module time sequence parameter to be measured; Output channel view data cache module is used for caching image data; RGB image generating module is used for the view data receiving buffer memory according to above-mentioned some screen clock signal, produces the screen of the point needed for the module to be measured RGB picture signal of respective channel;
MIPI vision signal LP modular converter is used for converting above-mentioned some screen RGB picture signal to MIPILP vision signal; MIPI vision signal HS (HighSpeed) modular converter is used for converting above-mentioned some screen RGB picture signal to MIPIHS vision signal; MIPI time delay adjusting module is first modulated each Lane parallel data, generate the MIPI vision signal of serial, then the time delay of the clock in each Lane and data-signal is adjusted, make the MIPI signal of each Lane can arrive module to be measured after cable simultaneously; MIPI signal driver module is for adjusting output electrical specification and the transport property of the MIPI vision signal of each Lane.
For realizing the object of the invention, according to another aspect of the present invention, providing a kind of method that MIPI vision signal single channel turns multichannel, comprising the steps:
(1) MIPI agreement is resolved, produce MIPI group bag data;
(2) according to the output image characteristic of the image signal source of input, decoding correlation parameter is obtained; According to decoding correlation parameter and MIPI group bag data, decoding conversion operations is carried out to MIPI parallel demodulation bus data, recovers the RGB benchmark image signal of image signal source;
Wherein, decoding correlation parameter comprises VESA, JEIDA transmission standard, 6 ~ 10bit image tonescale, synchronizing signal forward and reverse, transmission Lane number;
(3) buffer memory above-mentioned RGB benchmark image signal; Meanwhile, horizontal resolution and the vertical resolution of its image is gone out according to the synchronization signal detection of above-mentioned RGB benchmark image;
(4) the some screen clock signal of module to be measured corresponding to each passage is obtained according to the time sequence parameter of the resolution of the said reference image module to be measured corresponding with output channel; Receive the RGB benchmark image of buffer memory in output channel according to this some screen clock signal, and according to the Image Coding parameter of the module to be measured preset, convert some screen RGB picture signal corresponding to each passage to by exporting above-mentioned RGB benchmark image;
(5) parallel MIPILP vision signal and the MIPIHS vision signal of each Lane is generated according to above-mentioned some screen RGB picture signal;
(6) parallel data of each Lane is modulated, generate the MIPI vision signal of serial;
(7) adjust each clock of MIPI vision signal inside exporting Lane and time delay of data-signal, make the MIPI vision signal of all Lane all can arrive MIPI liquid crystal module to be measured after stube cable simultaneously.
Preferably, above-mentioned MIPI vision signal single channel turns the method for multichannel, also comprises the steps: after step (7)
Output electrical specification and transport property adjustment are carried out to the MIPI vision signal of each Lane after time delay adjustment, makes the quality of the MIPI vision signal of each Lane arriving module to be measured and signal amplitude all can reach module and receive requirement; Wherein, output electrical specification and transport property adjustment comprise pre-emphasis adjustment, the adjustment of driving intensity, the electric range-adjusting of MIPI, Slew Rate adjust and output impedance adjusts.
Preferably, above-mentioned MIPI vision signal single channel turns the method for multichannel, and the single channel MIPI vision signal of its input is from image signal source; Before step (2), also comprise the MIPI vision signal that image signal source is sent and adjust and the step of demodulation, specific as follows:
A () receives the MIPILane vision signal that image signal source sends, be terminated, impedance matching and signal equalization and amplification to the input signal of each Lane, to eliminate the image error code transmitting and cause;
B () is according to MIPI electrical standard, signal reconstruction is carried out to each LaneMIPI signal after step (a) adjustment, eliminate input signal overshoot, undershoot and burr, export the MIPI vision signal with standard electrical characteristic, to avoid interference the erroneous judgement causing subsequent module;
C () processes the above-mentioned delay had between the clock of each Lane inside of MIPI vision signal of standard electrical characteristic and data-signal, make to keep between each data-signal, between data-signal with clock signal aliging;
In this step, because the delay variance of each Lane is different, the internal clocking of each Lane, data delay are adjusted respectively;
D () adopts the clock signal of each Lane to sample and demodulation to data-signal parallel in corresponding Lane, obtain the MIPI parallel demodulation bus data of each Lane.
In general, the above technical scheme conceived by the present invention compared with prior art, can obtain following beneficial effect:
(1) adopt MIPI vision signal single channel provided by the invention to turn the apparatus and method of multichannel, according to 1 road MIPI vision signal, the MIPI vision signal that multichannel is used for the test of a large amount of liquid crystal module point screen can be obtained, realize the expansion to MIPI vision signal;
(2) MIPI vision signal single channel provided by the invention turns the device of multichannel, has carried out Lag synchronization control and signal reconstruction the MIPI vision signal of input, effectively can eliminate the reception mistake because transmission and external disturbance may cause;
(3) MIPI vision signal single channel provided by the invention turns the device of multichannel, multiple output interface can export MIPI vision signal simultaneously, and each MIPI Video Output Modules is independent of one another, does not interfere with each other, therefore independent of one another between each road MIPI vision signal exported, do not interfere with each other; Each MIPI Video Output Modules all can adjust separately image time sequence parameter, MIPI Video coding mode, MIPI transmits Lane number, output drives, export transport property, export MIPI electrical specification, export delay parameter; Be applicable to in a large number there is equal resolution but the discrepant module of characteristic under different operating environment, to carry out some screen checking simultaneously;
(4) MIPI vision signal single channel provided by the invention turns the device of multichannel, and each road MIPI vision signal of output can use under different working environments and transmission cable simultaneously; Simple to operate, without the need to other utility appliance, be applicable to large scale test;
(5) MIPI vision signal single channel provided by the invention turns the device of multichannel, adopts FPGA (field programmable logic array (FPLA)) chip to realize, and has reliable operation, cheap, the feature of being convenient to later maintenance and upgrading.
Accompanying drawing explanation
Fig. 1 is the functional block diagram that MIPI vision signal single channel provided by the invention turns multiple-pass unit;
Fig. 2 is the functional block diagram that MIPI vision signal single channel that the embodiment of the present invention provides turns multiple-pass unit;
Fig. 3 is the MIPI video reception module diagram in the embodiment of the present invention;
Fig. 4 is the MIPI Video Output Modules schematic diagram in the embodiment of the present invention;
In all of the figs, identical Reference numeral is used for representing identical element or structure, wherein: 1-human-machine interface module, 2-receives matching module, 3-electrically rebuilds module, 4-time delay alignment module, 5-demodulation module, 6-MIPI protocol module, 7-MIPI Video decoding module, 9-RGB view data cache module, 9-RGB image resolution ratio detection module, the local image sequence generation module of 10-, 11-output channel view data cache module, 12-RGB image generating module, 13-MIPI vision signal LP modular converter, 14-MIPI vision signal HS modular converter, 15-MIPI time delay adjusting module, 16-MIPI signal driver module, 2-1-first receives matched sub-block, 2-2-second receives matched sub-block, 2-N-N receives matched sub-block, 3-1-first electrically rebuilds submodule, 3-2-second electrically rebuilds submodule, 3-N-N electrically rebuilds submodule, 4-1-first time delay alignment submodule, 4-2-second time delay alignment submodule, 4-N-N time delay alignment submodule, 5-1-first demodulation submodule, 5-2-second demodulation submodule, 5-N-N demodulation submodule, 15-1-the one MIPI time delay adjustment submodule, 15-2-the 2nd MIPI time delay adjustment submodule, 15-N-NMIPI time delay adjustment submodule, 16-1-the one MIPI signal driven element module, 16-2-the 2nd MIPI signal driven element module, 16-N-NMIPI signal driven element module.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.In addition, if below in described each embodiment of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
MIPI vision signal single channel provided by the invention turns multiple-pass unit, its functional block diagram as shown in Figure 1, comprises a MIPI video signal input interface, MIPI video control signal input interface, a multiple MIPI video signal output interface and solidifies MIPI protocol module 6, MIPI Video decoding module 7, rgb image data cache module 8, RGB image resolution ratio detection module 9 and multiple MIPI Video Output Modules in programmable logic device (PLD);
Wherein, MIPI protocol module 6 is connected with MIPI Video decoding module 7, MIPI Video decoding module is connected with RGB image resolution ratio detection module 9 and rgb image data cache module 8, and RGB image resolution ratio detection module 9 is connected with each MIPI Video Output Modules with rgb image data cache module 8; Each MIPI Video Output Modules is parallel independent, noiseless each other, and can respective independent parameters;
MIPI Video decoding module 7 couples described MIPI video signal input interface by MIPI video signal input terminal, and MIPI protocol module 7 and each MIPI Video Output Modules all couple described video control signal input interface by MIPI video control signal input terminal; Each MIPI Video Output Modules has multiple link (Lane) MIPI VT, each LaneMIPI VT couples MIPI video signal output interface by MIPI video signal output terminal, by MIPI video signal output interface MIPI vision signal is sent to the MIPI liquid crystal module to be measured in respective channel.
Shown in Fig. 2, be the functional block diagram that MIPI vision signal single channel that the embodiment of the present invention provides turns multiple-pass unit, comprise human-machine interface module 1, MIPI protocol module 6, MIPI Video decoding module 7, rgb image data cache module 8, RGB image resolution ratio detection module 9 and multiple MIPI Video Output Modules;
In the present embodiment, the functional block diagram of MIPI video reception module as shown in Figure 3, comprises and receives matching module 2, electrically reconstruction module 3, time delay alignment module 4 and demodulation module 5; Receive matching module and comprise N number of reception matched sub-block 2-1 ~ 2-N, electric reconstruction module comprises N number of electric reconstruction submodule 3-1 ~ 3-N, time delay alignment module comprises N number of time delay alignment submodule 4-1 ~ 4-N, and demodulation module comprises N number of demodulation submodule 5-1 ~ 5-N;
In the present embodiment, the functional block diagram of the MIPI Video Output Modules of passage 1 correspondence as shown in Figure 4, comprises local image sequence generation module 10, output channel view data cache module 11, RGB image generating module 12, MIPI vision signal LP modular converter 13, MIPI vision signal HS modular converter 14, MIPI time delay adjusting module 15 and MIPI signal driver module 16; Wherein, MIPI time delay adjusting module 15 comprises N number of MIPI time delay adjustment and comprises N number of MIPI signal driven element module 16-1 ~ 16-N from module 15-1 ~ 15-N, MIPI signal driver module 16; Wherein, N is greater than 2.
The MIPI vision signal single channel provided based on the present embodiment turns multiple-pass unit, and realizing MIPI vision signal single channel, to turn the process of multichannel specific as follows:
(1) outside MIPI vision signal input parameter and Ge Lu MIPI vision signal output parameter is converted to MIPI video control signal by human-machine interface module 1;
(2) receive the MIPILane vision signal that matching module 2 receives image signal source transmission, receive each submodule corresponding signal receiving each Lane respectively of matching module 2; In embodiment, submodule 2-1 corresponding Lane0, submodule 2-2 corresponding Lane1 ..., the corresponding Lane (N-1) of submodule 2-N;
Each submodule is terminated and impedance matching to the MIPI vision signal of each Lane respectively; Under complicated environment for use, transport property and the suffered interference of the transmission cable of each Lane are inconsistent, can adjust according to the impedance matching value of on-site actual situations to each submodule receiving matching module 2;
Because the MIPI signal of each Lane exists signal attenuation and distortion when comparatively long range propagation, the each submodule receiving matching module 2 also carries out signal equalization and amplification to each LaneMIPI vision signal, improve signal amplitude and signal quality, to eliminate by transmitting the image error code caused; The equal adjustable of the balance parameters of each Lane, amplifying parameters;
(3) electrically rebuild module 3 and signal reconstruction is carried out to each LaneMIPI signal receiving matching module 2 output; Concrete, each submodule electrically rebuilding module 3 is adjudicated according to MIPI electrical standard each LaneMIPI signal received and is rebuild, and to eliminate the overshoot of input signal, undershoot, burr, exports the MIPI vision signal with standard electrical characteristic; Wherein, MIPI electrical standard comprises the minimum and maximal value of the minimum and maximal value of high level, low level, signal swing rate, shake;
(4) eliminate the clock of each Lane inside of MIPI and the delay of data of electrically rebuilding module 3 output, make to keep between the data-signal of each Lane inside, between data-signal with clock signal aliging;
Because the transmission cable characteristics difference of each Lane causes the delay variance of each Lane all not identical; The clock of each Lane, the delay of data are adjusted respectively, makes clock and the alignment of data of each Lane inside;
(5) demodulation module 5 is to the MIPI signal after each Lane alignment, adopts the clock signal of each Lane to sample and demodulation to each parallel data signal, obtains the parallel demodulation data of each Lane;
In the present embodiment, each submodule of demodulation module 5 has self-calibration function; After the calibration intervals preset, each submodule carries out self calibration respectively, clock signal is correctly sampled and each data-signal of demodulation, to avoid interference the error or drift that cause; For the Lane that interference is more serious, the calibration intervals of the demodulation submodule of the demodulation module 5 corresponding to it is shorter;
(6) MIPI protocol module 6 is resolved MIPI agreement according to video control signal, produces MIPI group bag data;
(7) MIPI Video decoding module 7 is according to MIPI group bag data and decoding parametric, to each Lane parallel demodulation decoding data conversion operations, recovers the RGB benchmark image signal of image signal source;
Wherein, decoding parametric obtains according to the characteristic of image signal source output image, comprises VESA, JEIDA transmission standard, 6 ~ 10bit image tonescale, synchronizing signal forward and reverse, transmission Lane number;
(8) buffer memory above-mentioned RGB benchmark image signal; Go out horizontal resolution and the vertical resolution of its image according to the synchronization signal detection of above-mentioned RGB benchmark image simultaneously; Wherein, the synchronizing signal of benchmark image comprises VSYNC (field sync signal), HSYNC (line synchronizing signal) and DE (data enable signal);
(9) in embodiment, each MIPI Video Output Modules is all parallel independent, and each MIPI Video Output Modules inside has identical submodule, processes identical to the received signal; Be described for a MIPI Video Output Modules below; Local image sequence generation module 10 in one MIPI Video Output Modules obtains the some screen clock signal of module to be measured corresponding to each passage according to the time sequence parameter (row field crop, back porch, synchronous pulsewidth) of the resolution of the said reference image module to be measured corresponding with output channel; RGB image generating module 12 receives the buffer memory rgb image data of output channel view data cache module 11 output according to this some screen clock signal, and according to the Image Coding parameter of module to be measured preset, above-mentioned RGB benchmark image is converted to the some screen RGB picture signal that each passage is corresponding;
(10) MIPI vision signal LP modular converter 13 generates according to above-mentioned some screen RGB picture signal the parallel MIPILP vision signal of each Lane, MIPI vision signal HS modular converter 14 to generate each Lane parallel MIPIHS vision signal according to above-mentioned some screen RGB picture signal;
(11) MIPI time delay adjusting module is first modulated the parallel data of each Lane, generates the MIPI vision signal of serial; Adjust each clock of MIPI vision signal inside exporting Lane and time delay of data-signal again, make the MIPI vision signal of all Lane all can arrive MIPI liquid crystal module to be measured after stube cable simultaneously;
(13) MIPI signal driver module 16 MIPI to each Lane export electrical specification, transport propertys arrange, and comprise pre-emphasis, drive intensity, the setting of the electric amplitude of MIPI, Slew Rate and output impedance; Make the multichannel MIPI vision signal that exports by under the transmission cable of different qualities and disturbing effect, arrive the reception requirement that the signal quality of module to be measured and signal amplitude all meet MIPI liquid crystal module, guarantee that module can be verified by reliable and stable long screen.
This MIPI vision signal single channel that embodiment provides turns multiple-pass unit, and for a road MIPI vision signal of input, exportable multichannel MIPI vision signal, verifies in being suitable for carrying out module on a large scale; And each road MIPI vision signal can export, but independently of one another, does not interfere with each other simultaneously; The image time sequence parameter of each road MIPI vision signal exported, MIPI Video coding mode, MIPI transmit Lane number, output drives, export transport property, export MIPI electrical specification, export the parameters such as time delay all can adjust separately, be applicable to, to a large amount of, there is equal resolution, to there is the module of different qualities under different operating environment, the checking of same time point screen can be carried out.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a MIPI vision signal single channel turns the device of multichannel, it is characterized in that, described device comprises a MIPI video signal input interface, MIPI video control signal input interface, a multiple MIPI video signal output interface, and solidifies MIPI Video decoding module, MIPI protocol module, RGB image resolution ratio detection module, rgb image data cache module, multiple MIPI Video Output Modules in a programmable logic device (PLD); Described programmable logic device (PLD) has the MIPI video signal input terminal coupling described MIPI video signal input interface, the MIPI video control signal input terminal coupling described MIPI video control signal input interface and couples multiple MIPI video signal output terminals of each described MIPI video signal output interface one by one;
Described MIPI protocol module is connected with MIPI Video decoding module, MIPI Video decoding module is connected with RGB image resolution ratio detection module and rgb image data cache module, and RGB image resolution ratio detection module is connected with each MIPI Video Output Modules with rgb image data cache module; Each MIPI Video Output Modules is parallel independent, all can separate configurations MIPI video coding parameter and transformation parameter; According to a road MIPI vision signal of input, the multichannel MIPI vision signal with different qualities can be generated;
Described MIPI Video decoding module couples described MIPI video signal input interface by MIPI video signal input terminal, and MIPI protocol module and each MIPI Video Output Modules all couple described video control signal input interface by MIPI video control signal input terminal; Each described MIPI Video Output Modules has multiple link MIPI VT, and each link MIPI VT couples MIPI video signal output interface by MIPI video signal output terminal.
2. device as claimed in claim 1, it is characterized in that, described device also comprises human-machine interface module; Described human-machine interface module has outside display interface and external command input interface; Described human-computer interaction module is used for generating MIPI video control signal according to external command, is sent to MIPI protocol module and each MIPI Video Output Modules by described MIPI video control signal input terminal; Also for the status information of whole device is exported by outside display interface.
3. device as claimed in claim 2, it is characterized in that, described device also comprises MIPI video reception module; Described MIPI video reception module is solidified in described programmable logic device (PLD), its first end couples described MIPI video signal input interface by described MIPI video signal input terminal, second end connects described human-computer interaction module by described MIPI video control signal input terminal, and the 3rd end is connected with described MIPI Video decoding module.
4. device as claimed in claim 3, is characterized in that, described MIPI video reception module comprises reception matching module, electrically rebuilds module, time delay alignment module and demodulation module;
Described reception matching module with electrically rebuild model calling, electrically rebuild module and be connected with time delay alignment module, time delay alignment module is connected with demodulation module; Receive the input end of matching module as the first end of MIPI video reception module, the output terminal of demodulation module is as the 3rd end of MIPI video reception module; Receive matching module control end, electrically rebuild the control end of module control end, time delay alignment module control end and demodulation module side by side as the second end of MIPI video reception module.
5. device as claimed in claim 4, it is characterized in that, described reception matching module comprises multiple reception matched sub-block, and electrically reconstruction module comprises multiple electric reconstruction submodule, time delay alignment module comprises multiple time delay alignment submodule, demodulation module comprises multiple demodulation submodule; Receive matched sub-block, electrically rebuild submodule, time delay alignment submodule is identical with the number of demodulation submodule.
6. device as claimed in claim 5, it is characterized in that, each described demodulation submodule has self-calibration function, can carry out self calibration according to the alignment time interval arranged.
7. device as claimed in claim 1, it is characterized in that, described MIPI Video Output Modules comprises local image sequence generation module, output channel view data cache module, RGB image generating module, MIPI vision signal LP modular converter, MIPI vision signal HS modular converter, MIPI time delay adjusting module and MIPI signal driver module;
Described local image sequence generation module is all connected with RGB image generating module with output channel view data cache module, and RGB image generating module is connected with MIPI vision signal HS modular converter with MIPI vision signal LP modular converter; MIPI vision signal LP modular converter is all connected with MIPI time delay adjusting module with MIPI vision signal HS modular converter, and MIPI time delay adjusting module is connected with MIPI signal driver module; The input end of local image sequence generation module is as the second end of MIPI Video Output Modules; The input end of output channel view data cache module is as the 3rd end of MIPI Video Output Modules; The output terminal of MIPI signal driver module is as the MIPI VT of MIPI Video Output Modules.
8. the MIPI vision signal single channel turning the device of multichannel based on the MIPI vision signal single channel described in any one of claim 1 to 7 turns a method for multichannel, and it is characterized in that, described method comprises the steps:
(1) MIPI agreement is resolved, produce MIPI group bag data;
(2) according to the output image characteristic of the image signal source of input, decoding correlation parameter is obtained; According to decoding correlation parameter and MIPI group bag data, decoding conversion operations is carried out to MIPI parallel demodulation bus data, recovers the RGB benchmark image signal of image signal source;
(3) RGB benchmark image signal described in buffer memory; Meanwhile, horizontal resolution and the vertical resolution of its image is gone out according to the synchronization signal detection of described RGB benchmark image;
(4) the some screen clock signal of module to be measured corresponding to each passage is obtained according to the time sequence parameter of the resolution of the described benchmark image module to be measured corresponding with output channel; Receive the RGB benchmark image of buffer memory in output channel according to described screen clock signal, and according to the Image Coding parameter of the module to be measured preset, convert some screen RGB picture signal corresponding to each passage to by exporting described RGB benchmark image;
(5) parallel MIPILP vision signal and the MIPIHS vision signal of each Lane is generated according to described screen RGB picture signal;
(6) parallel data of each Lane is modulated, generate the MIPI vision signal of serial;
(7) adjust each clock of MIPI vision signal inside exporting Lane and time delay of data-signal, make the MIPI vision signal of all Lane all can arrive MIPI liquid crystal module to be measured after stube cable simultaneously.
9. MIPI vision signal single channel as claimed in claim 8 turns the method for multichannel, it is characterized in that, also comprises the steps: after described step (7)
Output electrical specification and transport property adjustment are carried out to the MIPI vision signal of each Lane after time delay adjustment, makes the quality of the MIPI vision signal of each Lane arriving module to be measured and signal amplitude all can reach module and receive requirement; Wherein, output electrical specification and transport property adjustment comprise pre-emphasis adjustment, the adjustment of driving intensity, the electric range-adjusting of MIPI, Slew Rate adjust and output impedance adjusts.
10. MIPI vision signal single channel as claimed in claim 8 turns the method for multichannel, and it is characterized in that, described MIPI vision signal single channel turns the method for multichannel, and the single channel MIPI vision signal of its input is from image signal source; Before step (2), also comprise the MIPI vision signal that image signal source is sent and adjust and the step of demodulation, specific as follows:
A () input signal to each Lane that image signal source sends is terminated, impedance matching and signal equalization and amplification;
B (), according to MIPI electrical standard, is carried out signal reconstruction to each LaneMIPI signal after step (a) adjustment, is eliminated input signal overshoot, undershoot and burr, export the MIPI vision signal with standard electrical characteristic;
C () processes the above-mentioned delay had between the clock of each Lane inside of MIPI vision signal of standard electrical characteristic and data-signal, make to keep between each data-signal, between data-signal with clock signal aliging;
D () adopts the clock signal of each Lane to sample and demodulation to data-signal parallel in corresponding Lane, obtain the MIPI parallel demodulation bus data of each Lane.
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