CN117793273A - Display interface expansion module, system and method - Google Patents
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Abstract
The invention belongs to the technical field of video interfaces, and discloses a display interface expansion module, a system and a method, wherein the display interface expansion module comprises a receiving unit, a dividing unit and an output unit which are connected in sequence; the receiving unit is used for receiving the video data input by the input interface and analyzing the video data to generate a video signal stream; the dividing unit is used for receiving the video signal stream which is generated by the receiving unit in a parsing way and dividing the video signal stream into a plurality of video signal streams; the output unit is configured to receive the separated video signal streams and output the separated video signal streams. The invention can realize multi-screen display by arranging the dividing unit to divide the video signal stream into a plurality of video signal streams for output, thereby avoiding that each display module in the prior art needs a separate main control module for control and overcoming the problem of too few existing video output interfaces.
Description
Technical Field
The invention belongs to the technical field of video interfaces, and relates to a display interface expansion module, a system and a method.
Background
With the continuous development of automobile electronic technology, the vehicle-mounted system can provide services such as navigation, radio, music playing and the like for drivers and passengers. Along with the popularization of intelligent cabs of automobiles, a plurality of display screens are contained in one vehicle-mounted system, and the number of the output video interfaces of the controller is increased by the vehicle-mounted display system. The current controllers are mainly aimed at the mobile phone or tablet markets, only have a single display interface, and a plurality of controllers are needed if a plurality of screens are needed to be driven.
In view of the foregoing, there is a need in the art for a display interface extension module, system and method to solve the above-mentioned problems.
Disclosure of Invention
In view of the above, the present invention aims to solve the above problems, and provide a display interface expansion module, a system and a method capable of implementing a single main control module to drive multiple display screens.
In order to solve the technical problems, the invention provides a display interface expansion module, which comprises a receiving unit, a dividing unit and an output unit which are connected in sequence;
the receiving unit is used for receiving the video data input by the input interface and analyzing the video data to generate a video signal stream;
the dividing unit is used for receiving the video signal stream which is generated by the receiving unit in a parsing way and dividing the video signal stream into a plurality of video signal streams;
the output unit is configured to receive the separated video signal streams and output the separated video signal streams.
As a further improvement of the present invention, the display interface expansion module further includes a buffer unit, and the buffer unit is connected with the dividing unit and the output unit;
the buffer unit is configured to receive the plurality of video signal streams separated by the separation unit, buffer the plurality of separated video signal streams, and output the plurality of buffered separated video signal streams to the output unit.
As a further improvement of the present invention, the output unit is configured to receive the separated multiple video signal streams buffered by the buffering unit, and perform timing reconstruction on the separated multiple video signal streams.
The invention also provides a display interface expansion system, which comprises a main control module, a display interface expansion module and a display module which are connected in sequence:
the main control module is used for outputting video data to the display interface expansion module;
the display interface expansion module is used for receiving the video data, analyzing the video data to generate a video signal stream, dividing the video signal stream into a plurality of video signal streams, and transmitting the video signal streams to the display module;
the display module is used for receiving the video signal streams separated by the display interface expansion module and displaying the video signal streams.
As a further improvement of the present invention, the display interface expansion module includes an input interface and an output interface;
the input interface is used for receiving video data output by the main control module;
the output interface is used for transmitting the video signal streams separated by the display interface expansion module to the display module.
As a further improvement of the present invention, the input interface includes an MIPI input interface and an LVDS input interface;
the output interfaces include an MIPI output interface and an LVDS output interface.
As a further improvement of the invention, the main control module is an SOC module.
As a further improvement of the invention, the display interface expansion module is an FPGA module.
As a further improvement of the invention, the display module is a display screen, and the number of the display screens is at least 2.
The invention also provides a display interface expansion method, which comprises the following steps:
outputting video data to a display interface expansion module;
receiving the video data, analyzing the video data to generate a video signal stream, dividing the video signal stream into a plurality of video signal streams, and transmitting the video signal streams to a display module;
and receiving a plurality of video signal streams separated by the display interface expansion module, and displaying the video signal streams.
The technical effect of this application is: compared with the prior art, the display interface expansion module, the system and the method provided by the invention can realize multi-screen display by arranging the dividing unit to divide the video signal stream into a plurality of video signal streams for output, so that each display module in the prior art needs a single main control module for control, and the problem of too few existing video output interfaces is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present invention, but not all embodiments, and other drawings obtained according to these drawings without inventive effort to those skilled in the art are all within the scope of the protection of the present application.
Fig. 1 is a schematic structural diagram of a display interface expansion module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display interface expansion system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In order that the present disclosure may be more fully described and fully understood, the following description is provided by way of illustration of embodiments and specific examples of the present invention; this is not the only form of practicing or implementing the invention as embodied. The description covers the features of the embodiments and the method steps and sequences for constructing and operating the embodiments. However, other embodiments may be utilized to achieve the same or equivalent functions and sequences of steps. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the description of the embodiments of the present invention, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: in addition, in the description of the embodiments of the present application, "a plurality" means two or more, and other words and the like, it is to be understood that the preferred embodiments described herein are merely for illustrating and explaining the present invention, and are not intended to limit the present invention, and that the embodiments of the present application and the features of the embodiments may be combined with each other without conflict.
It should be understood that the terms first, second, and the like in the description and the claims of the present invention and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein.
Furthermore, it should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
Referring to fig. 1-2, the present invention provides a display interface extension module, a system and a method for solving the problem of how to implement a single main control module to drive multiple display screens.
Specifically, please refer to fig. 1 for a schematic structural diagram of a display interface expansion module according to an embodiment of the present invention, the present invention provides a display interface expansion module, which includes a receiving unit, a dividing unit and an output unit connected in sequence; the receiving unit is used for receiving the video data input by the input interface and analyzing the video data to generate a video signal stream, and the video signal stream is specifically analyzed from a high-speed serial video interface to obtain a video signal stream and a field synchronization signal; the dividing unit is used for receiving the video signal stream which is generated by the receiving unit in a parsing way and dividing the video signal stream into a plurality of video signal streams; the output unit is used for receiving the separated video signal streams and outputting the separated video signal streams. The receiving unit is arranged to decode the received video data, the video signal stream is generated by analysis, the dividing unit is arranged to divide the video signal stream of the video signal stream generated by analysis of the receiving unit into a plurality of video signal streams for output, so that multi-screen display of the video data can be realized, each display module in the prior art is prevented from needing a separate main control module for control, and the problem that the existing video output interface is too few is solved. It should be noted that the dividing unit may be a chip capable of dividing a video signal stream into a plurality of video signal streams with the same resolution according to a preset dividing requirement, or may be other hardware devices with similar functions, which is not limited in this embodiment.
It can be understood that the dividing unit divides the video signal stream into a plurality of video signal streams, where the plurality of video signal streams are video signal streams with the same resolution, the plurality of video signal streams with the same resolution refer to a plurality of portions of a complete display signal stream, and if three partition display signal streams with the same resolution are spliced together, the complete display signal stream can be obtained, where the resolution and the time of the content between the plurality of video signal streams with the same resolution are kept consistent, and there is no excessive limitation on the content, and the video signal streams can be identical display content or different display content.
As a further improvement of the present invention, the display interface expansion module further includes a buffer unit, and the buffer unit is connected with the dividing unit and the output unit; the buffer unit is configured to receive the plurality of video signal streams separated by the separation unit, buffer the plurality of separated video signal streams, and output the buffered plurality of separated video signal streams to the output unit. The buffer unit is used for buffering a certain amount of video signal streams, realizing the clock domain crossing of the video signal streams and providing continuous video signal streams for the subsequent video time sequence reconstruction. The buffer unit is connected with the segmentation unit and the output unit, and is used for buffering the video signal stream data separated into a plurality of video signal stream data, so that clock domain crossing of the video signal stream data is realized, and continuous video signal stream data is provided for subsequent video time sequence reconstruction. It should be understood that the storage unit is used for storing the related video signal stream data, and may be a nonvolatile memory chip, such as a read-only memory, a Flash chip, or a volatile memory chip, such as a DRAM or an SRAM, which is not limited in this embodiment.
As a further improvement of the present invention, the output unit is configured to receive the separated multiple video signal streams buffered by the buffering unit, and perform timing reconstruction on the separated multiple video signal streams. In some embodiments, the output unit may further serialize and decode a plurality of video signal streams, de-frame the video signal streams, decode the video signal streams, and so on, restore different types of data from the received video signal streams according to different identifiers, adjust the display timing through the idle symbol, thereby restoring the original video display data, and achieve the purpose of low-latency, resolution-adaptive video optical fiber transmission.
Referring to fig. 2, the present invention further provides a display interface expansion system, which includes a main control module, a display interface expansion module, and a display module that are sequentially connected: the main control module is used for outputting video data to the display interface expansion module; the display interface expansion module is used for receiving the video data, analyzing the video data to generate a video signal stream, dividing the video signal stream into a plurality of video signal streams, and transmitting the video signal streams to the display module; the display module is used for receiving the video signal streams separated by the display interface expansion module and displaying the video signal streams. The display interface expansion module divides video data output by the main control module into a plurality of video signal streams, and transmits the video signal streams to the display module, so that the video signal streams are displayed on the display module, the main control module which originally has only 1 video interface can drive two or more display modules, the multi-screen display of the video data can be realized, the problem that in the prior art, each display module needs to be controlled by a single main control module is solved, and the problem that the existing video output interfaces are too few is solved.
As a further improvement of the present invention, the display interface expansion module includes an input interface and an output interface; the input interface is used for receiving video data output by the main control module; the output interface is used for transmitting the video signal streams separated by the display interface expansion module to the display module. The input interface is used for receiving video data output by the main control module; the output interface is used for transmitting the video signal streams separated by the display interface expansion module to the display module, so that the receiving unit can analyze video data and line field synchronous signals from the high-speed serial video interface.
As a further improvement of the present invention, the input interfaces include MIPI (Mobile Industry Processor Interface ) input interfaces and LVDS (Low Voltage Differetial Signaling, low voltage differential signaling) input interfaces; the output interfaces include an MIPI output interface and an LVDS output interface. The input interface comprises an MIPI input interface and an LVDS input interface; the output interface comprises an MIPI output interface and an LVDS output interface, so that the display interface expansion system can be flexibly switched between the MIPI interface and the LVDS interface, and the problem of plate making caused by hardware interface replacement is avoided.
As a further improvement of the invention, the main control module is an SOC (System on Chip) module. The problem of insufficient SOC video interfaces in a vehicle-mounted display system in the prior art can be solved by setting the main control module as an SOC module, when a plurality of display screens are driven, the requirement can be met by using one SOC, the display equipment of the existing SOC is fixed in design, particularly, the SOC is low in cost, and only one display equipment or no special display equipment is arranged. Some SOC hardware display interfaces can only display one video at a time, but cannot transmit video through two channels at the same time. The main control module is set as the SOC module, so that the SOC can drive a plurality of display modules.
As a further improvement of the invention, the display interface expansion module is an FPGA (Field Programmable GateArray ) module. The display interface expansion module is an FPGA module, so that an FPGA chip can be realized, video data input by an MIPI input interface and an LVDS input interface of the SOC module are decoded and analyzed to generate video signal streams, the video signal streams are divided into a plurality of video signal streams by the dividing unit, the video signal streams divided by the dividing unit are stored in the buffer unit after being divided, the buffered video signal streams are output to the output unit, and the output unit carries out time sequence reconstruction on the divided video signal streams. And after the video time sequence is rebuilt, outputting the video through the MIPI output interface and the LVDS output interface. Through the display interface expansion system, an SOC chip originally having only 1 video interface can drive two or more display modules.
As a further improvement of the invention, the display module is a display screen, and the number of the display screens is at least 2. It can be understood that the number of the display screens corresponds to the number of the output units, by setting the number of the display screens to be at least 2, dividing the plurality of video signal streams separated by the unit, storing the divided plurality of video signal streams into the buffer unit, outputting the buffered plurality of video signal streams to the output unit, and outputting the time sequence reconstruction of the separated plurality of video signal streams to the display screen by the output unit for displaying.
The invention also provides a display interface expansion method, which comprises the following steps:
outputting video data to a display interface expansion module;
receiving the video data, analyzing the video data to generate a video signal stream, dividing the video signal stream into a plurality of video signal streams, and transmitting the video signal streams to a display module;
and receiving a plurality of video signal streams separated by the display interface expansion module, and displaying the video signal streams.
In the embodiment of the invention, screen parameters of a plurality of sections of videos to be displayed and a display screen are acquired; determining the positions of display screens of a plurality of sections of videos to be displayed according to control information input by a user; dividing different display screens according to the display positions to obtain a plurality of positions to be displayed; the method for controlling different display screens to display corresponding videos to be displayed includes the steps of dividing the display screens by obtaining multiple sections of videos to be displayed, achieving the purpose of displaying different contents of different display screens, and further solving the technical problem that in the prior art, if multiple screens need to be driven, multiple SOCs need to be driven, and therefore the technical effect that the SOCs drive the multiple display screens in the vehicle-mounted display system is achieved.
In a specific implementation, the SOC module outputs video data to the display interface expansion module. The receiving unit decodes and analyzes the video data of the encoded signal stream to obtain a section of video signal stream to be displayed on the display screen in a partitioning mode, the video signal stream is transmitted to the partitioning unit, the partitioning unit partitions the obtained video signal stream into a plurality of video signal streams with the same resolution according to the obtained partitioning strategy, for example, 3 display screens with the resolution of 4320×720 are arranged, at this time, the partitioning unit partitions the video signal into 3 video signals 1440×720, the 3 video signal streams are stored in 3 buffer units, the buffered 3 video signal streams are output to 3 output units for outputting, the 3 output units respectively reconstruct the time sequence of the partitioned 3 video signal streams, and then the obtained 3 video signals are transmitted to the corresponding areas of the display screen for completing display, and can be output to the display screen through an MIPI output interface and an LVDS output interface according to the difference of the connection interfaces of the display screen.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.
The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.
The foregoing has described in detail the technical solutions provided herein, and specific examples have been used to illustrate the principles and embodiments of the present application, where the above examples are only used to help understand the methods and core ideas of the present application; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (10)
1. The display interface expansion module is characterized by comprising a receiving unit, a dividing unit and an output unit which are connected in sequence;
the receiving unit is used for receiving the video data input by the input interface and analyzing the video data to generate a video signal stream;
the dividing unit is used for receiving the video signal stream which is generated by the receiving unit in a parsing way and dividing the video signal stream into a plurality of video signal streams;
the output unit is configured to receive the separated video signal streams and output the separated video signal streams.
2. The display interface expansion module according to claim 1, further comprising a buffer unit, wherein the buffer unit is connected to the dividing unit and the output unit;
the buffer unit is configured to receive the plurality of video signal streams separated by the separation unit, buffer the plurality of separated video signal streams, and output the plurality of buffered separated video signal streams to the output unit.
3. The display interface expansion module according to claim 2, wherein the output unit is configured to receive the separate video signal streams buffered by the buffer unit and perform timing reconstruction on the separate video signal streams.
4. The display interface expansion system is characterized by comprising a main control module, a display interface expansion module and a display module which are sequentially connected:
the main control module is used for outputting video data to the display interface expansion module;
the display interface expansion module is used for receiving the video data, analyzing the video data to generate a video signal stream, dividing the video signal stream into a plurality of video signal streams, and transmitting the video signal streams to the display module;
the display module is used for receiving the video signal streams separated by the display interface expansion module and displaying the video signal streams.
5. The display interface expansion system of claim 4, wherein the display interface expansion module comprises an input interface and an output interface;
the input interface is used for receiving video data output by the main control module;
the output interface is used for transmitting the video signal streams separated by the display interface expansion module to the display module.
6. A display interface extension system according to claim 5, wherein:
the input interface comprises an MIPI input interface and an LVDS input interface;
the output interfaces include an MIPI output interface and an LVDS output interface.
7. The display interface expansion system of claim 4, wherein the main control module is an SOC module.
8. The display interface extension-based system of claim 4, wherein the display interface extension module is an FPGA module.
9. The display interface expansion system of claim 4, wherein the display module is a display screen, and the number of the display screens is at least 2.
10. A display interface expansion method, comprising:
outputting video data to a display interface expansion module;
receiving the video data, analyzing the video data to generate a video signal stream, dividing the video signal stream into a plurality of video signal streams, and transmitting the video signal streams to a display module;
and receiving a plurality of video signal streams separated by the display interface expansion module, and displaying the video signal streams.
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