CN110336988B - Three-level video information transmission system for full laser projection - Google Patents
Three-level video information transmission system for full laser projection Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3129—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] scanning a light beam on the display screen
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3129—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] scanning a light beam on the display screen
- H04N9/3135—Driving therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3161—Modulator illumination systems using laser light sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
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Abstract
The invention provides a three-level video information transmission system of full laser projection, wherein video signals in the three-level video information transmission system are input and then are subjected to pixel point reforming, segmentation and packaging processing by a first-level processing subsystem and distributed to a plurality of groups of second-level processing subsystems, the second-level processing subsystems are decoded and then are segmented and packaged and distributed to a plurality of groups of third-level processing subsystems, a plurality of groups of LDs are simultaneously driven after being processed by the third-level processing subsystems, pixel scanning is realized by vibrating mirror driving, the display of a frame of image is completed, and the frame rate and the brightness are greatly improved.
Description
Technical Field
The invention relates to the technical field of laser projection and video signal processing, in particular to a three-level video information transmission system of full laser projection.
Background
The laser projection display technology is a display technology using RGB three-primary-color lasers as light sources. Among the display technologies in various forms, laser display technology represents the trend and mainstream direction of future development of display technologies, and is the focus of competition in the future display field. Engineering projection and digital cinema based on modern digital technology are solving the resolution and definition problems of video images, including acquisition, processing, storage, transmission and reproduction of signals.
Interlaced scanning, in which each frame is divided into two fields of pictures to be alternately displayed, and progressive scanning, in which all the pictures of each frame are simultaneously displayed, are both methods of reproducing video images.
However, in the normal scanning method of the display screen, the scanning is performed from left to right and from top to bottom, and the frame rate of the video image cannot be increased because a fixed number of frames are scanned per second due to the limitation of the mirror speed.
Disclosure of Invention
In view of the above, to solve the above problems, the present invention provides a three-level video information transmission system of full laser projection, and the technical solution is as follows:
a three-level video information transmission system for full laser projection, the three-level video information transmission system comprising: the system comprises a video signal transmission module, a galvanometer drive, a primary processing subsystem, a plurality of secondary processing subsystems in communication connection with the primary processing subsystem, a plurality of tertiary processing subsystems in communication connection with each secondary processing subsystem, and an LD drive in communication connection with each tertiary processing subsystem;
the video signal transmission module is used for transmitting a video signal to the primary processing subsystem in a pixel serial transmission mode;
the primary processing subsystem is used for converting the video signal into RGB data, performing reverse sequence on the even line RGB data of each frame of image, converting the serial transmission mode into a parallel transmission mode, and performing line-by-line packing processing on the RGB data of each frame of image to averagely distribute the RGB data to the secondary processing subsystem;
the secondary processing subsystem is used for decoding the received RGB data and performing line-by-line packaging processing to distribute the RGB data to the tertiary processing subsystem averagely;
the three-stage processing subsystem is used for decoding the received RGB data, dividing the RGB data into parallel odd-line or parallel even-line data, and simultaneously lightening the LD drives of all the odd-line or even-line in a parallel mode to form pixels;
the galvanometer drive is used for scanning the pixels to form an image.
Preferably, the primary processing subsystem includes: a color decoding module;
the color decoding module is used for converting the video signal into RGB data.
Preferably, the primary processing subsystem further comprises: a data reverse order module;
the data reverse order module is used for reversing the order of the even line RGB data of each frame of image.
Preferably, the data reverse order module includes: a first storage unit and a second storage unit;
the first storage unit is used for writing odd line RGB data point by point and reading the odd line RGB data forward;
the second storage unit is used for writing the even line RGB data point by point and reversely reading the even line RGB data.
Preferably, the primary processing subsystem further comprises: a DDR memory module;
the DDR memory module is used for reforming the odd line RGB data read in the forward direction and the even line RGB data read in the reverse direction into an odd-even line parallel data structure.
Preferably, the primary processing subsystem further comprises: a reading module;
the reading module is used for packing the RGB data of each frame of image line by line so as to distribute the RGB data to the secondary processing subsystem evenly.
Preferably, the secondary processing subsystem comprises: the device comprises a first decoding module, a first data partitioning module and a packaging module;
the first decoding module is used for decoding the received RGB data;
the first data segmentation module is used for segmenting the decompressed RGB data;
and the packing module is used for carrying out row-by-row packing processing so as to distribute the packed data to the three-level processing subsystem averagely.
Preferably, the tertiary treatment subsystem comprises: the second decoding module, the second data partitioning module and the LD driving module;
the second decoding module is used for decoding the received RGB data;
the second data segmentation module is used for segmenting the RGB data after decompression processing into parallel odd-line data or parallel even-line data;
the LD driving module is used for lighting the LD driving of all odd lines or even lines simultaneously in a parallel mode to form pixels.
Preferably, the galvanometer drive includes: a horizontal galvanometer and a vertical galvanometer;
the horizontal galvanometer is used for scanning all the odd line RGB data;
the vertical galvanometer is used for pixel shift so that the horizontal galvanometer scans all even lines of RGB data.
Compared with the prior art, the invention has the following beneficial effects:
according to the three-level video information transmission system for full laser projection, after video signals are input, pixel point reforming, segmentation and packaging are carried out by the primary processing subsystem, the video signals are distributed to the multiple groups of secondary processing subsystems, the secondary processing subsystems carry out decoding, segmentation and packaging, the video signals are distributed to the multiple groups of tertiary processing subsystems, the multiple groups of LDs are driven simultaneously after the processing of the tertiary processing subsystems, pixel scanning is achieved through vibrating mirror driving, the display of one frame of image is completed, and the frame rate and the brightness are greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a three-level video information transmission system for full laser projection according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an exemplary embodiment of an input video signal scan;
fig. 3 is a schematic diagram of scanning a full laser projection video signal according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a primary processing subsystem according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a RAM read/write operation according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating an example of reading odd and even rows of a RAM according to the present invention;
FIG. 7 is a schematic memory diagram of a DDR memory module according to an embodiment of the invention;
FIG. 8 is a diagram illustrating a video data structure according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a video data line segmentation according to an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a secondary processing subsystem according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a three-stage processing subsystem according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a three-level video information transmission system for full laser projection according to an embodiment of the present invention, where the three-level video information transmission system includes: a video signal transmission module 11, a galvanometer driver 12, a primary processing subsystem 13, a plurality of secondary processing subsystems 14 communicatively connected to the primary processing subsystem 13, a plurality of tertiary processing subsystems 15 communicatively connected to each of the secondary processing subsystems 14, and an LD driver 16 communicatively connected to each of the tertiary processing subsystems 15;
the video signal transmission module 11 is configured to transmit a video signal to the primary processing subsystem 13 in a pixel serial transmission manner;
the primary processing subsystem 13 is configured to convert the video signal into RGB data, reverse the even line RGB data of each frame of image, convert the serial transmission mode into a parallel transmission mode, and perform line-by-line packing processing on the RGB data of each frame of image to distribute the RGB data to the secondary processing subsystem 14 averagely;
the secondary processing subsystem 14 is configured to decode the received RGB data and perform line-by-line packing processing to distribute the RGB data to the tertiary processing subsystem 15 averagely;
the three-stage processing subsystem 15 is configured to decode and divide the received RGB data into parallel odd-line or parallel even-line data, and light up all the LD drivers 16 of the odd-line or even-line in a parallel manner to form pixels;
the galvanometer driver 12 is used for scanning the pixels to form an image.
Specifically, the galvanometer driver 12 includes: a horizontal galvanometer and a vertical galvanometer;
the horizontal galvanometer is used for scanning all the odd line RGB data; namely, the horizontal galvanometer scans all the odd-line (or even-line) pixel points left and right simultaneously in a left and right scanning mode to complete the display of the odd frame (or even frame).
The vertical galvanometer is used for pixel shift so that the horizontal galvanometer scans all even lines of RGB data. Namely, the vertical galvanometer realizes the offset of an upper pixel and a lower pixel in an up-and-down scanning mode, thereby realizing the switching of odd frames (all odd lines in one image) and even frames and finishing the display of one frame of image.
It should be noted that the present invention is only illustrated in a galvanometer scanning manner, and other fast mirrors may also be adopted, such as a fast mirror implemented by an MEMS (micro electro mechanical system) process, a fast mirror implemented by a voice coil motor, and the like.
In this embodiment, referring to fig. 2, fig. 2 is a schematic diagram of scanning an input video signal according to an embodiment of the present invention, in which the input video signal is transmitted point by point in a pixel manner, that is, a first point in a first row is transmitted first, and then a second point is transmitted until a row is transmitted. The first dot of the next row is then transmitted. Thus, up to the last point of the last row, the transfer mode is a pixel serial transfer mode.
Referring to fig. 3, fig. 3 is a schematic diagram of scanning a full laser projection video signal according to an embodiment of the present invention, when an imaging is performed by using a full laser projection system galvanometer scanning mode, a column of images is displayed at a time by using parallel imaging of a plurality of pixels, after a horizontal galvanometer scans from one side to the other side, all odd lines of a frame of the frame are completely displayed, then the vertical galvanometer deflects pixels to be vertically deflected, and when the horizontal galvanometer returns from the side along the opposite direction, all even lines of the frame are scanned.
In this embodiment, according to the three-level video information transmission system for full laser projection provided by the present application, after a video signal is input, pixel point reforming and partitioning are performed by a first-level processing subsystem, and the video signal is subjected to line-by-line packing processing and distributed to a plurality of sets of second-level processing subsystems, the second-level processing subsystems perform decoding and then partition, packing and distribute to a plurality of sets of third-level processing subsystems, a set of third-level processing subsystems decodes the video signal and simultaneously drives a plurality of sets of LDs to emit RGB three colors to converge into a single pixel, odd lines of a frame of image can be simultaneously scanned by a horizontal galvanometer, and then the display of the frame of image can be completed by pixel offset by a vertical galvanometer.
It should be noted that, in the present application, the operations of odd lines and even lines may be replaced with each other, for example, the horizontal galvanometer may scan the odd lines or even lines of a frame of image simultaneously, and then the odd lines or even lines may be displayed by shifting pixels through the vertical galvanometer.
For another example, when the horizontal galvanometer scans even lines of a frame of image at the same time, the odd lines of data may be processed in reverse order.
The present application is described by way of example only and is not intended to be limiting.
Further, referring to fig. 4, fig. 4 is a schematic structural diagram of a primary processing subsystem according to an embodiment of the present invention, where the primary processing subsystem 13 includes: a color decoding module 41;
wherein, the color decoding module 41 is used for converting the video signal into RGB data.
The primary processing subsystem 13 further includes: a data reverse order module 42;
the data reverse order module 42 is configured to reverse order the even line RGB data of each frame of image.
In this embodiment, since the horizontal galvanometer is deflected forward, odd-line parallel pixels are scanned from left to right, and therefore odd-line video data is defined as positive order. When the horizontal galvanometer deflects reversely, even-line parallel pixels scan from right to left, and relatively even-line video data is in an inverse sequence, so that the even-line RGB data needs to be in an inverse sequence.
It should be noted that even-line pixels may be scanned from left to right when the horizontal galvanometer deflects in the forward direction, and even-line video data is defined as a positive sequence, and odd-line pixels are scanned from right to left when the horizontal galvanometer deflects in the reverse direction, and relatively odd-line video data is in a reverse sequence, and further odd-line RGB data needs to be in a reverse sequence.
That is, the design of the positive and negative sequence of the odd-even data can be realized not only by the positive sequence odd rows and the negative sequence even rows, but also by the negative sequence odd rows and the positive sequence even rows.
Referring to fig. 5, fig. 5 is a schematic diagram of reading and writing a RAM according to an embodiment of the present invention, and referring to fig. 6, fig. 6 is a schematic diagram of reading parity rows of a RAM according to an embodiment of the present invention, where the data reverse-order module 42 includes: a first memory cell RAM0 and a second memory cell RAM 1;
wherein the first storage unit RAM0 is used for writing odd line RGB data point by point and reading the odd line RGB data forward;
the second storage unit RAM1 is used to write the even line RGB data dot by dot, and read the even line RGB data in reverse.
In this embodiment, as shown in fig. 2, the first row of data is written dot by dot in the RAM0 area, and when the first row of data is completely stored in the RAM0, the second row of data is written in the RAM1 area while the data in the RAM0 is being read in the forward direction. When the second row of data is completely stored in the RAM1, the data reading of the first row is completed, and the data of the third row is written into the RAM0 point by point, and the data in the RAM1 is read in the reverse direction, namely, the forward and reverse order reforming of the parity row of data is realized.
It should be noted that the embodiment of the present invention only uses the RAM to implement the positive and negative order rearrangement, and other implementations are within the scope of the present invention.
Further, as shown in fig. 4, the primary processing subsystem 13 further includes: a DDR memory module 43;
wherein the DDR memory module 43 is configured to reform the odd line RGB data read in the forward direction and the even line RGB data read in the reverse direction into an odd-even line parallel data structure.
In this embodiment, in order to convert the video data structure transmitted serially into the data structure with parallel odd and even lines, the video data after being processed by the data reverse order module 42 is processed by the DDR memory module 43 for data reformation.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating a DDR memory module according to an embodiment of the present invention, odd rows of the first frame of video data are stored point by point in a DDR3_ a0 region of a DDR3_ a region, and even rows are stored in a DDR3_ a1 region of a DDR3_ a region in the same manner. When the DDR3_ a area completely stores the first frame video data, the second frame video data stores the DDR3_ B area in the same manner.
Referring to fig. 8, fig. 8 is a schematic diagram of a video data structure according to an embodiment of the present invention, in which odd-numbered data in the DDR3_ a0 region are read in a parallel manner, and even-numbered data in the DDR3_ a1 region are read in the same manner. When the reading of the first frame of video data in the DDR3_ A area is completed, the DDR3_ B area completely stores the second frame of video data, the video data in the DDR3_ B area is read in the same way at the same time, the DDR3_ A area writes the third frame of video data, the ping-pong operation is carried out on the two adjacent frames of video data in this way, and the reformation of the video data is realized through the design of the read-write address logic.
It should be noted that the present invention only uses the DDR memory module to realize the video data reforming mode in an exemplary manner, and can also be realized by FIFO (first in first out), RAM, SDRAM (synchronous dynamic random access memory), IC chip, and the like.
Further, as shown in fig. 4, the primary processing subsystem 13 further includes: a reading module 44;
the reading module 44 is configured to perform a line-by-line packing process on the RGB data of each frame of image to distribute the RGB data to the secondary processing subsystem 14 evenly.
In this embodiment, referring to fig. 9, fig. 9 is a schematic diagram of video data line segmentation provided in the embodiment of the present invention, and the reformed data is further processed by the reading module to implement line segmentation, and then is packaged and converted into LVDS (low voltage differential signaling) to be distributed to a plurality of sets of secondary processing subsystems.
Further, referring to fig. 10, fig. 10 is a schematic structural diagram of a secondary processing subsystem according to an embodiment of the present invention, where the secondary processing subsystem 14 includes: a first decoding module 101, a first data partitioning module 102 and a packing module 103;
the first decoding module 101 is configured to perform decoding processing on the received RGB data;
the first data segmentation module 102 is configured to perform segmentation processing on the decompressed RGB data;
the packing module 103 is configured to perform a line-by-line packing process to distribute the packed data evenly to the tertiary processing subsystems.
In this embodiment, since the primary processing subsystem cannot suspend the multi-stage and three-stage processing subsystems, multiple sets of secondary processing subsystems are added to segment the video data again.
Firstly, the secondary processing subsystem receives RGB data, firstly performs decoding operation, then writes the RGB data into the second data segmentation module for segmentation again, the segmentation modes of the same secondary processing subsystem are the same, and the segmented RGB data are packaged and converted into LVDS (low voltage differential signaling) and distributed to the multi-set tertiary processing subsystem.
It should be noted that the present invention uses LVDS to transmit video data by way of example only, and it may also use TTL (logic gate circuit), RSDS (low swing differential signaling), TMDS (transition minimized differential signaling) and so on to transmit data.
However, the transmission efficiency can be improved by using an LVDS (low voltage differential signaling) transmission scheme.
Further, referring to fig. 11, fig. 11 is a schematic structural diagram of a three-stage processing subsystem according to an embodiment of the present invention, where the three-stage processing subsystem 15 includes: a second decoding module 111, a second data dividing module 112, and an LD driving module 113;
the second decoding module 111 is configured to perform decoding processing on the received RGB data;
the second data dividing module 112 is configured to divide the decompressed RGB data into parallel odd-line data or parallel even-line data;
the LD driving module 113 is used for driving the LDs that simultaneously illuminate all odd or even rows in a parallel manner to form pixels.
In this embodiment, the three-stage processing subsystem is primarily responsible for decoding, reforming, and LD driving the received RGB data.
Firstly, data sent by the secondary processing subsystem is decoded, clock domain crossing processing is carried out through the second data dividing module, the data are divided into parallel odd-line or even-line video data, a plurality of groups of LDs are driven simultaneously in a parallel mode, and therefore all the odd-line or even-line LDs are lightened simultaneously.
The three-level video information transmission system of full laser projection provided by the invention is described in detail, and the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include or include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A three-level video information transmission system of full laser projection is characterized in that the three-level video information transmission system comprises: the system comprises a video signal transmission module, a galvanometer drive, a primary processing subsystem, a plurality of secondary processing subsystems in communication connection with the primary processing subsystem, a plurality of tertiary processing subsystems in communication connection with each secondary processing subsystem, and an LD drive in communication connection with each tertiary processing subsystem;
the video signal transmission module is used for transmitting a video signal to the primary processing subsystem in a pixel serial transmission mode;
the primary processing subsystem is used for converting the video signal into RGB data, performing reverse sequence on the even line RGB data of each frame of image, converting the serial transmission mode into a parallel transmission mode, and performing line-by-line packing processing on the RGB data of each frame of image to averagely distribute the RGB data to the secondary processing subsystem;
the secondary processing subsystem is used for decoding the received RGB data and performing line-by-line packaging processing to distribute the RGB data to the tertiary processing subsystem averagely;
the three-stage processing subsystem is used for decoding the received RGB data, dividing the RGB data into parallel odd-line or parallel even-line data, and simultaneously lightening the LD drives of all the odd-line or even-line in a parallel mode to form pixels;
the galvanometer drive is used for scanning the pixels to form an image.
2. The three-stage video information transmission system according to claim 1, wherein said primary processing subsystem comprises: a color decoding module;
the color decoding module is used for converting the video signal into RGB data.
3. The three-stage video information transmission system according to claim 2, wherein said primary processing subsystem further comprises: a data reverse order module;
the data reverse order module is used for reversing the order of the even line RGB data of each frame of image.
4. The three-level video information transmission system according to claim 3, wherein said data reverse-order module comprises: a first storage unit and a second storage unit;
the first storage unit is used for writing odd line RGB data point by point and reading the odd line RGB data forward;
the second storage unit is used for writing the even line RGB data point by point and reversely reading the even line RGB data.
5. The three-stage video information transmission system according to claim 4, wherein said primary processing subsystem further comprises: a DDR memory module;
the DDR memory module is used for reforming the odd line RGB data read in the forward direction and the even line RGB data read in the reverse direction into an odd-even line parallel data structure.
6. The three-stage video information transmission system according to claim 5, wherein said primary processing subsystem further comprises: a reading module;
the reading module is used for packing the RGB data of each frame of image line by line so as to distribute the RGB data to the secondary processing subsystem evenly.
7. The three-level video information transmission system according to claim 6, wherein said secondary processing subsystem comprises: the device comprises a first decoding module, a first data partitioning module and a packaging module;
the first decoding module is used for decoding the received RGB data;
the first data segmentation module is used for segmenting the decompressed RGB data;
and the packing module is used for carrying out row-by-row packing processing so as to distribute the packed data to the three-level processing subsystem averagely.
8. The three-level video information transmission system according to claim 7, wherein said three-level processing subsystem comprises: the second decoding module, the second data partitioning module and the LD driving module;
the second decoding module is used for decoding the received RGB data;
the second data segmentation module is used for segmenting the RGB data after decompression processing into parallel odd-line data or parallel even-line data;
the LD driving module is used for lighting the LD driving of all odd lines or even lines simultaneously in a parallel mode to form pixels.
9. The three-stage video information transmission system according to claim 8, wherein said galvanometer driving includes: a horizontal galvanometer and a vertical galvanometer;
the horizontal galvanometer is used for scanning all the odd line RGB data;
the vertical galvanometer is used for pixel shift so that the horizontal galvanometer scans all even lines of RGB data.
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