CN111246140A - Digital mark display method and digital mark display system - Google Patents
Digital mark display method and digital mark display system Download PDFInfo
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- CN111246140A CN111246140A CN201811440036.6A CN201811440036A CN111246140A CN 111246140 A CN111246140 A CN 111246140A CN 201811440036 A CN201811440036 A CN 201811440036A CN 111246140 A CN111246140 A CN 111246140A
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Abstract
The embodiment of the invention discloses a digital sign display method, which comprises the following steps: responding to a received digital mark display instruction to obtain the size of output resolution, calculating the drawing position of the digital mark according to the size of the output resolution in proportion, and drawing the digital mark according to the drawing position to obtain a digital mark image; receiving a video input image; superposing the video input image and the digital marking image to obtain a video output image; and outputting the video output image to a display screen through a video output interface for displaying. The embodiment of the invention also discloses a digital sign display system. The embodiment of the invention can solve the problem of incompatibility between the size of the OSD digital marking image and the size of the video image, and simultaneously reduces the BOM cost, simplifies the production flow, reduces the development amount and improves the system stability.
Description
Technical Field
The invention relates to the technical field of video processing, in particular to a digital marking display method and a digital marking display system.
Background
When the video processor is connected with the display, in order to correspond the video output interfaces with the display and to divide the bottom edge of the display when the output image is rotated, the display screen is convenient for field personnel to assemble the display screen as required, corresponding marks need to be displayed On the display screen, and therefore, a digital mark display method of On-screen display (OSD) is designed.
In the prior art, a network and a USB (Universal Serial Bus) for communicating with a main control circuit and other devices, a Random Access Memory (RAM) for storing OSD digital mark display data, a video processing circuit for superimposing input video data and OSD digital marks, a Read Only Memory (ROM) for storing input video data, and a RAM for outputting video data obtained by superimposing are required in a hardware scheme for OSD digital mark display. During production, the upper computer is required to send the digital marks of the OSD to the main control circuit through a network or a USB, and the main control circuit stores data into the ROM. When the OSD digital mark needs to be displayed, the main control circuit is needed to read the OSD digital mark in the ROM and write the OSD digital mark into the RAM, and then the video processing circuit is used for overlapping, outputting and displaying the OSD digital mark in the RAM and input video data.
The hardware scheme requires a network, a USB and a ROM, and the BOM (Bill of Material) cost is increased. The OSD digital mark display data needs to be solidified into the equipment in the production flow, and the complexity of the production flow is increased. In a software system, a network, a USB (universal serial bus) and a ROM (read only memory) drive are required to be added, so that the development amount is increased, and the stability of the software system is reduced. In the OSD digital mark display, since the image size of the cured OSD digital mark display data is determined, when the OSD digital mark display data is superimposed on the input video data, the problem of incompatibility between the size of the OSD digital mark image and the size of the video image may occur due to the influence of the size of the output image.
Therefore, how to reduce the BOM cost, simplify the production process, reduce the development amount, improve the system stability, and draw the digital label according to the video image size in proportion, and solve the problem of the incompatibility between the OSD digital label image size and the video image size is a problem to be solved urgently at present.
Disclosure of Invention
Embodiments of the present invention provide a digital mark display method and a digital mark display system, which can draw a digital mark according to the size of a video image in proportion, solve the problem of incompatibility between the size of a digital mark image and the size of the video image, and simultaneously reduce BOM cost, simplify production flow, reduce development amount, and improve system stability.
On one hand, the digital sign display method provided by the embodiment of the invention comprises the following steps: responding to a received digital mark display instruction to obtain the size of output resolution, calculating the drawing position of the digital mark according to the size of the output resolution in proportion, and drawing the digital mark according to the drawing position to obtain a digital mark image; receiving a video input image; superposing the video input image and the digital marking image to obtain a video output image; and outputting the video output image to a display screen through a video output interface for displaying.
In an embodiment of the present invention, the drawing the digital mark to obtain the digital mark image is performed in a memory, and the drawing the digital mark to obtain the digital mark image according to the drawing position specifically includes: drawing the digital mark in a first storage area of the memory according to the drawing position; copying the drawn data indication to a second storage area of the memory.
In an embodiment of the present invention, the storing the video input image in the memory, and the superimposing the video input image and the digital mark image to obtain the video output image specifically includes: reading data of the video input image from a third storage area of the memory; reading data of the digital signage image from the second storage area of the memory; in the blanking period of the output time sequence of the video output image, the data of the digital marking image is superposed on the data of the video input image as OSD display data to obtain the video output image; storing the video output image to a fourth storage area of the memory.
In one embodiment of the present invention, the number designation comprises: the image orientation indication mark and the output interface indication mark; the number indicating image includes: the image direction indication identification image and the output interface indication identification image respectively correspond to the image direction indication identification and the output interface indication identification; the image orientation indication identification image is used for indicating the orientation of the video output image, and the output interface indication identification image is used for indicating the video output interface for outputting the video output image.
In another aspect, an embodiment of the present invention provides a digital signage display system, including: the main control circuit is used for sending a digital mark display instruction; a display screen; the video processing circuit is connected with the main control circuit; the video output interface is connected with the video processing circuit and the display screen; wherein the video processing circuit comprises: the first receiving module is used for receiving the digital mark display instruction; the drawing module is used for responding to the received digital mark display instruction to obtain the size of output resolution, calculating the drawing position of the digital mark according to the size of the output resolution in proportion, and drawing the digital mark according to the drawing position to obtain a digital mark image; the second receiving module is used for receiving the video input image; the superposition module is used for carrying out superposition processing on the video input image and the digital marking image to obtain a video output image; and the output module is used for outputting the video output image to the display screen through a video output interface for displaying.
In one embodiment of the present invention, the number designation display system further includes: and the memory is connected with the video processing circuit.
In one embodiment of the invention, the main control circuit comprises a microcontroller, the display screen is a spliced display screen, and the memory is a random access memory.
In an embodiment of the present invention, the drawing the digital mark to obtain the digital mark image is performed in a memory, and the drawing module includes: the drawing unit is used for drawing the digital mark in a first storage area of the memory according to the drawing position; and the copying unit is used for copying the drawn data mark to a second storage area of the memory.
In one embodiment of the invention, the video input image is stored in the memory, and the overlay module comprises: a first reading unit configured to read data of the video input image from a third storage area of the memory; a second reading unit for reading data of the digital signage image from the second storage area of the memory; the superposition unit is used for superposing the data of the digital marking image as OSD display data on the data of the video input image in the blanking period of the output time sequence of the video output image to obtain the video output image; a storage unit to store the video output image to a fourth storage area of the memory.
In one embodiment of the present invention, the number designation comprises: the image orientation indication mark and the output interface indication mark; the number indicating image includes: the image direction indication identification image and the output interface indication identification image respectively correspond to the image direction indication identification and the output interface indication identification; the image orientation indication identification image is used for indicating the orientation of the video output image, and the output interface indication identification image is used for indicating the video output interface for outputting the video output image.
The above technical solution may have one or more of the following advantages: the digital mark is drawn locally in real time according to the output resolution ratio to obtain a digital mark image, and the digital mark image and the video input image are overlapped to obtain a video output image, so that the problem of incompatibility of the size of the OSD digital mark image and the size of the video image can be solved, the BOM cost is reduced, the production flow is simplified, the development amount is reduced, and the system stability is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flowchart illustrating a digital mark display method according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a digital signage display system according to a second embodiment of the invention;
fig. 3 is a schematic diagram of the display effect of the numerical indication.
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.
First embodiment
As shown in fig. 1, a digital sign display method 10 provided for a first embodiment of the present invention mainly includes:
step S11: responding to a received digital mark display instruction to obtain the size of output resolution, calculating the drawing position of the digital mark according to the output resolution in proportion, and drawing the digital mark according to the drawing position to obtain a digital mark image. Specifically, the numerical designation display instruction includes, for example, a command to perform numerical designation display, the content of the numerical designation to be displayed, the size of the output resolution, the ratio of the numerical designation size and the coordinate to the output resolution size, a command to draw the numerical designation, and the like. The output resolution is, for example, a resolution size of an output image or a screen resolution of a display screen on which the output image is to be displayed, including a length-direction resolution and a width-direction resolution; the scale comprises, for example, relative coordinates and relative size of the rendered digital signage image in the output image or the display screen; for example, if the size of an output image is 1024 pixels 512 pixels, the coordinates of the start point of the output image (the point at the upper left corner) is (0,0), and the number indicates that the center point of the image is at the center point in the output image, the relative coordinates thereof can be defined as (x-1/2, y-1/2), and the actual coordinates thereof are (1024 pixels 1/2,512-1/2), that is, (512,256); if the relative size is 1/5, the size of the plotted digital signage image should be (1024 × 1/5) pixels × 512 pixels 1/5.
In step S13, a video input image is received. In particular, the resolution of the video input image has been adjusted, for example, to the resolution to be output.
And step S15, overlapping the video input image and the digital marking image to obtain a video output image. The overlaying process is, for example, directly overlaying the digital marking image onto the video input image to obtain the video output image.
And step S17, outputting the video output image to a display screen through a video output interface for displaying.
Specifically, the step of drawing the digital mark to obtain the digital mark image is performed in a memory, for example, and the step of drawing the digital mark according to the drawing position in the step S11 to obtain the digital mark image specifically includes the steps of:
(1) drawing the digital mark in a first storage area of the memory according to the drawing position; specifically, the drawing process is well defined by a program, for example.
(2) Copying the drawn data indication to a second storage area of the memory.
The video input image is stored in the memory, for example, and step S15 includes the steps of:
(1) reading data of the video input image from a third storage area of the memory;
(2) reading data of the digital signage image from the second storage area of the memory;
(3) in the blanking period of the output time sequence of the video output image, the data of the digital marking image is superposed on the data of the video input image as OSD display data to obtain the video output image; specifically, performing the above-described actions in the blanking period of the output timing of the video output image instead of the valid period can avoid the video output image stored in the fourth display region being changed and an error occurring in the process of reading the video output image of the fourth display region for display within the valid period of the output timing of the video output image.
(4) Storing the video output image to a fourth storage area of the memory.
The numerical designation includes, for example: the image orientation indication mark and the output interface indication mark; the number indicating image includes: the image direction indication identification image and the output interface indication identification image respectively correspond to the image direction indication identification and the output interface indication identification; the image orientation indication identification image is used for indicating the orientation of the video output image, and the output interface indication identification image is used for indicating the video output interface for outputting the video output image. Specifically, as shown in fig. 3, which is an example of a video output image, the video output image 30 includes a video input image 31 (e.g., a common background picture of a computer desktop as shown in fig. 3, which is merely an example) and a number indicating image superimposed thereon, which is composed of an image orientation indicator 33 (e.g., a black display screen frame as shown in fig. 3) and an output interface indicator 35 (e.g., a number 02 as shown in fig. 3). The image orientation indicator 33 is, for example, a black display frame having a shape similar to a base, and the base of the black display frame is used to indicate the bottom edge of the image; of course, the image orientation indicator 33 may be any other icon capable of indicating the image orientation, and is not limited to the black display frame. The output interface indicator 35 is, for example, an arabic numeral, the number of digits of the arabic numeral depends on how many video output interfaces are, for example, although the output interface indicator 35 may also be any indicator that can indicate different video output interfaces, such as english letters, etc.
Second embodiment
As shown in fig. 2, a digital signage display system 20 according to a second embodiment of the present invention mainly includes: main control circuit 21, video processing circuit 25, video output interface 27 and display screen 29.
The main control circuit 21 is configured to send a digital mark display instruction;
a video output interface 27 connecting the video processing circuit 25 and the display screen 29;
the video processing circuit 25 is connected with the main control circuit 21;
the video processing circuit 25 is, for example, configured to execute the number indication display method 10 according to the first embodiment, and the detailed flow of the number indication display method 10 refers to the detailed description of the first embodiment, which is not repeated herein.
Specifically, the video processing circuit 25 includes, for example: a first receiving module 251, a rendering module 253, a second receiving module 255, a superimposing module 257, and an output module 259.
The first receiving module 251 is, for example, configured to receive the numerical indication display instruction.
The drawing module 253, for example, is configured to obtain an output resolution in response to the received digital indicator display instruction, calculate a drawing position of the digital indicator according to the output resolution in a proportion, and draw the digital indicator according to the drawing position to obtain a digital indicator image. I.e., for performing step S11 of the numeric indication display method 10.
The second receiving module 255 is for receiving a video input image, for example. I.e., for performing step S13 of the numeric indication display method 10.
The superimposing module 257 is configured to perform, for example, superimposing processing on the video input image and the digital marker image to obtain a video output image. I.e., for performing step S15 of the numeric indication display method 10.
The output module 259 is used for outputting the video output image to the display screen 29 through the video output interface 27 for display, for example. I.e., for performing step S17 of the numeric indication display method 10.
Further, the digital signage display system 20, for example, further includes a memory 23 connected to the video processing circuit 25.
The master control circuit 21 comprises, for example, a microcontroller, the display screen 29 is, for example, a tiled display screen, and the memory 23 is, for example, a random access memory. For further details, refer to the description of the first embodiment.
Specifically, the drawing the digital mark to obtain the digital mark image is performed in the memory 23, and the drawing module 253 includes: a rendering unit 2531 and a copying unit 2533. Wherein the drawing unit 2531 is configured to draw the digital indication in the first storage area 231 of the memory 23 according to the drawing position; i.e., for performing sub-step (1) of step S11 in the numeric indication display method 10. The copying unit 2533 is configured to copy the drawn data indication to the second storage area 233 of the memory 23; i.e., for performing sub-step (2) of step S11 in the numeric indication display method 10.
The video input image is stored in the memory 23, and the overlay module 257 includes, for example: a first reading unit 2571, a second reading unit 2573, a superimposing unit 2575, and a storage unit 2577. Wherein the first reading unit 2571 is configured to read data of the video input image from the third storage area 235 of the memory 23; i.e., for performing sub-step (1) of step S15 in the numeric indication display method 10. The second reading unit 2573 is configured to read data of the digital signage image from the second storage area 233 of the memory 23; i.e., for performing sub-step (2) of step S15 in the numeric indication display method 10. The superimposing unit 2575 is configured to superimpose, in a blanking period of an output timing sequence of the video output image, data of the digital indicator image as OSD display data on data of the video input image to obtain the video output image; i.e., for performing sub-step (3) of step S15 in the numeric indication display method 10. A storage unit 2577 for storing the video output image to the fourth storage area 237 of the memory 23, for example; i.e., for performing the substep (4) of step S15 in the numerical designation display method 10.
In summary, the first and second embodiments of the present invention do not need a network, a USB, and a ROM in terms of hardware solutions, thereby reducing the BOM cost. OSD digital mark display data does not need to be solidified into equipment in the production flow, and the complexity of the production flow is reduced. In the software system, a network, a USB (universal serial bus) and a ROM (read only memory) drive are not required to be added, so that the development amount is reduced and the stability of the software system is improved. On the OSD digital mark display, the display position and the display size of the OSD digital mark display image are drawn according to the output image size in proportion, so that the problem that the output image size is not matched with the OSD digital mark size is avoided, and the experience of a user is improved. And finally, drawing the digital mark locally in real time according to the output resolution ratio in proportion to obtain a digital mark image, solving the problem of incompatibility between the size of the OSD digital mark image and the size of the video image, and simultaneously reducing the BOM cost, simplifying the production flow, reducing the development amount and improving the system stability.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and/or method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units/modules is only one logical division, and there may be other divisions in actual implementation, for example, multiple units or modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units/modules described as separate parts may or may not be physically separate, and parts displayed as units/modules may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units/modules can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, each functional unit/module in the embodiments of the present invention may be integrated into one processing unit/module, or each unit/module may exist alone physically, or two or more units/modules may be integrated into one unit/module. The integrated units/modules may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units/modules.
The integrated units/modules, which are implemented in the form of software functional units/modules, may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing one or more processors of a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A digital signage display method, comprising:
responding to a received digital mark display instruction to obtain the size of output resolution, calculating the drawing position of the digital mark according to the size of the output resolution in proportion, and drawing the digital mark according to the drawing position to obtain a digital mark image;
receiving a video input image;
superposing the video input image and the digital marking image to obtain a video output image;
and outputting the video output image to a display screen through a video output interface for displaying.
2. The method for displaying a numeric indicator according to claim 1, wherein the step of obtaining the image of the numeric indicator by drawing the numeric indicator is performed in a memory, and the step of obtaining the image of the numeric indicator by drawing the numeric indicator according to the drawing position specifically comprises:
drawing the digital mark in a first storage area of the memory according to the drawing position;
copying the drawn data indication to a second storage area of the memory.
3. The method for displaying numerical identifiers according to claim 2, wherein the video input image is stored in the memory, and the superimposing the video input image and the numerical identifier image to obtain the video output image specifically includes:
reading data of the video input image from a third storage area of the memory;
reading data of the digital signage image from the second storage area of the memory;
in the blanking period of the output time sequence of the video output image, the data of the digital marking image is superposed on the data of the video input image as OSD display data to obtain the video output image;
storing the video output image to a fourth storage area of the memory.
4. The digital signage display method of claim 1, wherein the digital signage includes: the image orientation indication mark and the output interface indication mark; the number indicating image includes: the image direction indication identification image and the output interface indication identification image respectively correspond to the image direction indication identification and the output interface indication identification; the image orientation indication identification image is used for indicating the orientation of the video output image, and the output interface indication identification image is used for indicating the video output interface for outputting the video output image.
5. A digital signage display system, comprising:
the main control circuit is used for sending a digital mark display instruction;
a display screen;
the video processing circuit is connected with the main control circuit;
the video output interface is connected with the video processing circuit and the display screen;
wherein the video processing circuit comprises:
the first receiving module is used for receiving the digital mark display instruction;
the drawing module is used for responding to the received digital mark display instruction to obtain the size of output resolution, calculating the drawing position of the digital mark according to the size of the output resolution in proportion, and drawing the digital mark according to the drawing position to obtain a digital mark image;
the second receiving module is used for receiving the video input image;
the superposition module is used for carrying out superposition processing on the video input image and the digital marking image to obtain a video output image; and
and the output module is used for outputting the video output image to the display screen for display through a video output interface.
6. The numeric indicia display system according to claim 5, further comprising: and the memory is connected with the video processing circuit.
7. The digital signage display system of claim 6, wherein the master control circuit comprises a microcontroller, the display screen is a tiled display screen, and the memory is a random access memory.
8. The digital signage display system of claim 6, wherein the rendering of the digital signage to obtain the digital signage image is performed in a memory, the rendering module comprising:
the drawing unit is used for drawing the digital mark in a first storage area of the memory according to the drawing position;
and the copying unit is used for copying the drawn data mark to a second storage area of the memory.
9. The digital signage display system of claim 6, wherein the video input image is stored in the memory, the overlay module comprising:
a first reading unit configured to read data of the video input image from a third storage area of the memory;
a second reading unit for reading data of the digital signage image from the second storage area of the memory;
the superposition unit is used for superposing the data of the digital marking image as OSD display data on the data of the video input image in the blanking period of the output time sequence of the video output image to obtain the video output image;
a storage unit to store the video output image to a fourth storage area of the memory.
10. The digital signage display system of claim 5, wherein the digital signage comprises: the image orientation indication mark and the output interface indication mark; the number indicating image includes: the image direction indication identification image and the output interface indication identification image respectively correspond to the image direction indication identification and the output interface indication identification; the image orientation indication identification image is used for indicating the orientation of the video output image, and the output interface indication identification image is used for indicating the video output interface for outputting the video output image.
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