CN110557578A - Subtitle display device and method for LED spliced screen and related equipment - Google Patents
Subtitle display device and method for LED spliced screen and related equipment Download PDFInfo
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- CN110557578A CN110557578A CN201910932856.5A CN201910932856A CN110557578A CN 110557578 A CN110557578 A CN 110557578A CN 201910932856 A CN201910932856 A CN 201910932856A CN 110557578 A CN110557578 A CN 110557578A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/488—Data services, e.g. news ticker
- H04N21/4884—Data services, e.g. news ticker for displaying subtitles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/278—Subtitling
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Abstract
the invention provides a subtitle display device, a method and related equipment for an LED spliced screen, wherein the subtitle display device comprises the following components: the control module is used for receiving subtitle information, wherein the subtitle information comprises subtitle content, subtitle attributes and subtitle display attributes, and generating a subtitle picture based on the subtitle content and the subtitle attributes; the video sending module is used for receiving the subtitle picture and the subtitle display attribute sent by the control module and superposing the subtitle picture on a picture of a corresponding frame of a video based on the subtitle display attribute; and the LED spliced screen is used for receiving and displaying the video which is sent by the video sending module and is superposed by the subtitles. The method and the equipment provided by the invention realize subtitle display, improve the rolling consistency and simplify the use and deployment without increasing hardware equipment.
Description
Technical Field
The invention relates to the field of video display, in particular to a subtitle display device and method for an LED (light emitting diode) spliced screen and related equipment.
Background
In the field of small-pitch LEDs, subtitle display, scrolling is a particularly important application. In recent years, with the development of software and hardware technologies, subtitle display and scrolling have been widely applied in the fields of public display, security monitoring, business education and the like which use small-pitch LEDs.
the subtitle display and rolling method widely applied at present is that a video processor is additionally added in a deployment environment of small-distance LEDs, or video matrix equipment and a matrix chip are added, and various video signals are overlapped according to requirements through the video processor, the video matrix equipment or the matrix chip, so that the purpose of overlapping multiple video signals on a large screen at any position and in any size proportion is achieved. However, there are many inconveniences in practical use, such as: the video processor, the video matrix device or the matrix chip which is equipped needs to be matched with the original image transmitter device with small distance for use, the deployment environment increases the complexity, and the project cost is increased.
At present, another multi-screen subtitle display and scroll method is to trigger sequentially connected display screens to be started one by a subtitle scroll program in multi-screen equipment, and display the scroll subtitles after the display screens are started to the corresponding screens. The method does not start the display and the rolling of the multi-screen subtitles at the same time, but starts the next screen one by one when the subtitles are rolled to the edge of the previous screen, so that the delay of the subtitle display rolling and the strong coupling of each screen are easily caused; subtitles are not divided, so that multiple screens cannot be spanned in a non-scrolling direction.
therefore, it is not a best solution to adopt an additional video processor, video matrix device or matrix chip for subtitle display and scrolling of a small-distance LED large screen, and a method of starting on a screen-by-screen basis during multi-screen subtitle display and scrolling.
How to realize subtitle display without increasing hardware equipment, improve scrolling consistency and simplify use and deployment is a technical problem to be solved in the field.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a subtitle display device, a subtitle display method, electronic equipment and a storage medium for an LED (light emitting diode) spliced screen, which realize subtitle display, improve rolling consistency and simplify use and deployment without increasing hardware equipment.
According to an aspect of the present invention, there is provided a subtitle display apparatus for an LED tiled screen, including:
The control module is used for receiving subtitle information, wherein the subtitle information comprises subtitle content, subtitle attributes and subtitle display attributes, and generating a subtitle picture based on the subtitle content and the subtitle attributes;
the video sending module is used for receiving the subtitle picture and the subtitle display attribute sent by the control module and superposing the subtitle picture on a picture of a corresponding frame of a video based on the subtitle display attribute; and
And the LED spliced screen is used for receiving and displaying the video which is sent by the video sending module and is superposed by the subtitles.
In some embodiments of the invention, the video transmission module comprises:
the reading and writing module is used for receiving the subtitle picture and the subtitle display attribute sent by the control module, writing the subtitle picture and the subtitle display attribute sent by the control module into the first storage module, and reading the subtitle picture and the subtitle display attribute from the first storage module;
And the processing module is used for receiving the subtitle picture and the subtitle display attribute read by the reading and writing module from the first storage module and superposing the subtitle picture on a picture of a corresponding frame of a video based on the subtitle display attribute read by the reading and writing module from the first storage module.
in some embodiments of the present invention, the video transmitting module further comprises:
The second storage module is used for caching the subtitle picture and the subtitle display attribute read by the reading and writing module received by the processing module from the first storage module and providing the processing module for reading the subtitle picture and the subtitle display attribute cached by the second storage module, and the second storage module is a random storage.
In some embodiments of the invention, the processing module is a field programmable gate array.
In some embodiments of the present invention, the subtitle display attribute at least includes a subtitle display mode, and the subtitle display mode is static display or dynamic display;
If the subtitle display mode is static display, the subtitle display attribute further comprises a static coordinate of the subtitle display position, and the video sending module superposes the subtitle picture on the position of the static coordinate on the picture of the corresponding frame of the video according to the static coordinate;
if the subtitle display mode is dynamic display, the subtitle display attributes further comprise an initial coordinate and a display speed, and the video sending module executes the following steps:
Determining the step length and the interval frame number in a preset corresponding relation according to the display speed;
starting from a starting frame picture for determining the superposition of the caption in the video, superposing the caption picture on a multiframe picture with the 1 st interval frame number of the multiframe picture of the video, wherein the caption picture is positioned at the starting coordinate;
and for the multi-frame picture with the i-th interval frame number, superposing the subtitle picture on the multi-frame picture with the i-th interval frame number of the video, wherein the subtitle picture deviates from the deviation reference position by the stepping length, the deviation reference position is the position of the subtitle picture in the multi-frame picture with the i-1-th interval frame number, and i is an integer greater than 1.
In some embodiments of the present invention, the LED tiled screen includes a plurality of display modules, the number of the video sending modules corresponds to the number of the display modules one to one, and each of the video sending modules further cuts the subtitle picture according to the position of the corresponding display module on the plurality of display modules, and superimposes the cut subtitle picture on the picture of the corresponding frame of the video to be displayed by the corresponding display module.
According to another aspect of the present invention, there is also provided a subtitle display method for an LED tiled screen, including:
The control module receives subtitle information, wherein the subtitle information comprises subtitle content, subtitle attributes and subtitle display attributes, and subtitle pictures are generated based on the subtitle content and the subtitle attributes;
The control module sends the subtitle picture and the subtitle display attribute to a video sending module;
the video sending module receives the subtitle picture and the subtitle display attribute sent by the control module and superposes the subtitle picture on a picture of a corresponding frame of a video based on the subtitle display attribute;
the video sending module sends the video overlapped by the subtitles to an LED spliced screen;
And the LED spliced screen receives and displays the video which is sent by the video sending module and is superposed by the subtitles.
in some embodiments of the invention, the LED tiled screen includes a plurality of display modules, the number of the video sending modules corresponds to the number of the display modules one to one, the plurality of display modules form the LED tiled screen to display videos together, each of the display modules displays sub-videos synchronously so that the sub-videos together form the videos according to the positions of the display modules on the LED tiled screen,
the superimposing the subtitle picture onto the picture of the corresponding frame of the video based on the subtitle display attribute comprises:
Determining the step length and the interval frame number in a preset corresponding relation according to the display speed;
starting from a start frame picture of a subtitle determined to be superposed in a sub video to be played by a display module corresponding to the video sending module, cutting the subtitle picture according to the position of the display module corresponding to the video sending module on the LED splicing screen and the start position of a multi-frame picture of the sub video with the 1 st interval frame number, superposing the cut subtitle picture on the multi-frame picture of the sub video with the 1 st interval frame number, and enabling the complete subtitle picture to be located at the start coordinate of the LED splicing screen;
and cutting the subtitle picture according to the position of a display module corresponding to the video sending module on the LED spliced screen, the offset reference position and the stepping length for the multiframe picture with the ith interval frame number of the sub-video, and overlapping the cut subtitle picture on the multiframe picture with the ith interval frame number of the sub-video, so that the complete subtitle picture is offset from the offset reference position of the LED spliced screen by the stepping length, wherein the offset reference position is the position of the subtitle picture in the multiframe picture with the ith-1 interval frame number of the video, and i is an integer greater than 1.
According to still another aspect of the present invention, there is also provided an electronic apparatus, including: a processor; a storage medium having stored thereon a computer program which, when executed by the processor, performs the steps as described above.
according to yet another aspect of the present invention, there is also provided a storage medium having stored thereon a computer program which, when executed by a processor, performs the steps as described above.
Therefore, compared with the prior art, the scheme provided by the invention has the following advantages:
the original video sending equipment in the display device is adopted to display the subtitle with the overlapped image, and hardware equipment is not required to be added while the subtitle display is realized. Meanwhile, the method can support a plurality of video sending devices and LED spliced screens, cross-screen display at any position in the transverse direction, the longitudinal direction or any other direction, and dynamic subtitle display in the transverse direction, the longitudinal direction or any other direction, so that the rolling consistency is improved, and the use and the deployment are simplified.
Drawings
the above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a block diagram illustrating a subtitle display apparatus for an LED tiled screen according to an embodiment of the present invention.
fig. 2 shows a block diagram of a video transmission module according to an embodiment of the present invention.
FIG. 3 shows a schematic diagram of a plurality of display modules of an LED tiled screen according to an embodiment of the invention.
Fig. 4 shows a schematic diagram of a single display module horizontal scroll caption according to an embodiment of the invention.
Fig. 5 illustrates a schematic diagram of a single display module vertical scrolling in accordance with an embodiment of the invention.
Fig. 6 illustrates a schematic diagram of a plurality of display modules scrolling subtitles horizontally across screens according to an embodiment of the present invention.
fig. 7 illustrates a schematic diagram of a plurality of display modules scrolling subtitles vertically across screens according to an embodiment of the present invention.
fig. 8 is a flowchart illustrating a subtitle display method for an LED tiled screen according to an embodiment of the present invention.
fig. 9 schematically illustrates a computer-readable storage medium in an exemplary embodiment of the disclosure.
fig. 10 schematically illustrates an electronic device in an exemplary embodiment of the disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
the invention provides a subtitle display device and method for an LED (light emitting diode) spliced screen, electronic equipment and a storage medium, which are used for realizing subtitle display, improving the rolling consistency and simplifying the use and the deployment.
Referring first to fig. 1, fig. 1 is a block diagram illustrating a subtitle display apparatus for an LED tiled screen according to an embodiment of the present invention.
The subtitle display apparatus for the LED tiled screen includes a control module 110, a video transmission module 120, and an LED tiled screen 130. The control module 110 is configured to receive subtitle information, where the subtitle information includes subtitle content, subtitle attributes, and subtitle display attributes, and generate a subtitle picture based on the subtitle content and the subtitle attributes. The video sending module 120 is configured to receive the subtitle picture and the subtitle display attribute sent by the control module, and superimpose the subtitle picture on a picture of a frame corresponding to a video based on the subtitle display attribute. The LED mosaic screen 130 is used for receiving and displaying the video superimposed by the subtitles sent by the video sending module.
the control module 110 may be, for example, a hardware module integrated into the user terminal, or may be software installed in the user terminal, which is not intended to limit the present invention. The user terminal may be, for example, a smartphone, a tablet, a laptop, a wearable device, or other electronic device. The control module 110 may receive the subtitle information input by the user through an input device of the user terminal or an input device (e.g., an input device such as a keyboard or a touch screen) provided thereto. In some variations, the control module 110 may receive the subtitle information transmitted from the other device through wireless or wired communication. The subtitle information comprises subtitle content, subtitle attributes and subtitle display attributes, wherein the subtitle content comprises text information to be displayed by the subtitle; the subtitle attribute comprises the font of the subtitle, the font size of the subtitle, the color of the subtitle and the like; the subtitle display attributes comprise subtitle display parameters such as a subtitle display mode, a subtitle display position, a subtitle direction and the like.
The control module 110 and the video sending module 120 may communicate in a wireless or wired manner, so as to send the subtitle picture and the subtitle display attribute generated by the control module 110 to the video sending module 120. In some implementations of the invention, the control module 110 sends the subtitle content and the subtitle attribute to the video sending module 120 together, so as to check the subtitle picture.
in some embodiments of the present invention, the video sending module 120 includes a read/write module, a first storage module and a processing module. As shown in fig. 2, the read/write module may be a single chip 121, the first storage module may be a memory 123, and the processing module may be a field programmable gate array 122. The single chip microcomputer 121 is configured to receive the subtitle picture and the subtitle display attribute sent by the control module, write the subtitle picture and the subtitle display attribute sent by the control module into the memory 123, read the subtitle picture and the subtitle display attribute from the memory 123, and send the subtitle picture and the subtitle display attribute to the field programmable gate array 122. Thereby. And the subtitle pictures can not be lost when power is off. The field programmable gate array 122 is configured to receive the subtitle picture and the subtitle display attribute read by the single chip microcomputer 121 from the memory 123, and superimpose the subtitle picture on the picture of the frame corresponding to the video based on the subtitle display attribute read by the single chip microcomputer 121 from the memory 123. The picture of the frame corresponding to the video is a picture of a frame corresponding to the video that is predetermined to be superimposed with a subtitle, and the picture of the frame corresponding to the video may also be determined by a parameter (for example, a frame number or a video timestamp) received by the control module 110, for example. The video transmission module may further include a second storage module. The second storage module may be, for example, a random access memory 124. The random access memory 124 is configured to cache the subtitle picture and the subtitle display attribute read by the single chip microcomputer 121 from the memory 123 and received by the fpga 122, and allow the fpga 122 to read the subtitle picture and the subtitle display attribute cached by the random access memory 124, thereby implementing caching and effective transmission of the subtitle picture.
in some embodiments of the present invention, the video sending module 120 receives the subtitle attribute in addition to the subtitle picture and the subtitle display attribute, wherein the subtitle attribute may be used to control the module to read back the subtitle information. Correspondingly in this embodiment, the memory 123 may store a subtitle picture, a subtitle attribute, and a subtitle display attribute; the ram 124 may store only the subtitle picture and the subtitle display attribute, and the present invention is not limited thereto.
In some embodiments of the present invention, the subtitle display attribute at least includes a subtitle display mode, and the subtitle display mode is static display or dynamic display.
And if the subtitle display mode is static display, the subtitle display attribute further comprises a static coordinate of the subtitle display position, and the video sending module superposes the subtitle picture on the position of the static coordinate on the picture of the corresponding frame of the video according to the static coordinate.
If the subtitle display mode is dynamic display, the subtitle display attribute further comprises an initial coordinate and a display speed, and the video sending module executes the following steps: determining the step length and the interval frame number in a preset corresponding relation according to the display speed (the corresponding relation of the display speed and the step length and the interval frame number is prestored in the system); starting from a starting frame picture for determining the superposition of the caption in the video, superposing the caption picture on a multiframe picture with the 1 st interval frame number of the multiframe picture of the video, wherein the caption picture is positioned at the starting coordinate; and for the multi-frame picture with the i-th interval frame number, superposing the subtitle picture on the multi-frame picture with the i-th interval frame number of the video, wherein the subtitle picture deviates from the deviation reference position by the stepping length, the deviation reference position is the position of the subtitle picture in the multi-frame picture with the i-1-th interval frame number, and i is an integer greater than 1.
Therefore, the algorithm is realized in the video sending module, additional video processing equipment is not needed, the subtitle pictures are dynamically superposed on the video through the algorithm, the algorithm is simple, the calculated amount is small, and the requirement on a system is low. On the other hand, the dynamic display of the caption pictures on the LED spliced screen is realized according to the algorithm, the caption stepping direction is not required to be limited, and for example, the horizontal dynamic display, the vertical dynamic display or other dynamic displays inclined to the horizontal/vertical direction can be realized.
Specifically, the start coordinates in the above steps are, for example, four corner coordinates of the start position of the subtitle picture, but the present invention is not limited thereto, and any two corner coordinates of the start position may be provided. And according to the starting coordinate, the caption picture can be superposed to the starting coordinate of a multi-frame picture of the 1 st interval frame number from the starting frame picture for determining the superposed caption in the video. In some variations of the present invention, termination coordinates may be provided, and the termination coordinates are, for example, four-corner coordinates of a termination position of a subtitle picture. From the termination coordinates, the termination condition of the iteration can be determined.
further, the dynamic display of the present invention supports both landscape scrolling (as in FIG. 4) and portrait scrolling (as in FIG. 5). The subtitles that roll in the horizontal direction are displayed on the LED tiled screen 210 after being superimposed by acquiring subtitle pictures 230 with the same width from the random access memory by the fpga at each iteration. The subtitles that roll in the longitudinal direction are displayed on the LED tiled screen 210 after being superimposed by acquiring the subtitle picture 230 with the same height from the random access memory by the fpga at each iteration.
In some variations of the present invention, a background bar having a width suitable for the subtitle picture may be determined by the fpga according to the start coordinate (in other words, the width of the background bar may be equal to the width of the subtitle picture, and may be slightly greater than the width of the subtitle picture or other set width), and the fpga controls the subtitle picture to step transversely on the background bar according to the number of the interval frames and the step length, and superimposes the subtitle picture and the background bar onto the video picture to implement transverse scrolling. Likewise, vertical scrolling may also be performed in the same manner.
in some embodiments of the present invention, as shown in fig. 3, the LED tiled screen includes a plurality of display modules 131, the number of the video sending modules 120 corresponds to the number of the display modules 131 one to one, and each of the video sending modules 120 further cuts the subtitle picture according to the position of the corresponding display module 131 on the LED tiled screen 130, and superimposes the cut subtitle picture on the picture of the corresponding frame of the video to be displayed by the corresponding display module 131. In this embodiment, the control module 110 is also configured to control the video transmission module 120 to synchronize the sub-videos displayed on the respective display modules 131.
Specifically, the plurality of display modules 131 form an LED tiled screen to collectively display videos, and each of the display modules 131 synchronously displays sub-videos, so that the sub-videos collectively constitute the videos according to positions of the display modules 131 on the LED tiled screen. The distance between adjacent display modules 131 is small, for example, 1.5 mm, and the invention is not limited thereto.
The subtitle display attributes at least comprise a subtitle display mode, and the subtitle display mode is static display or dynamic display.
if the subtitle display mode is dynamic display, the subtitle display position comprises an initial coordinate and a display speed on an LED spliced screen formed by a plurality of display modules, and each video sending module executes the following steps: determining the step length and the interval frame number in a preset corresponding relation according to the display speed; starting from a start frame picture of a subtitle determined to be superposed in a sub video to be played by a display module corresponding to the video sending module, cutting the subtitle picture according to the position of the display module corresponding to the video sending module on the LED splicing screen and the start position of a multi-frame picture of the sub video with the 1 st interval frame number, superposing the cut subtitle picture on the multi-frame picture of the sub video with the 1 st interval frame number, and enabling the complete subtitle picture to be located at the start coordinate of the LED splicing screen; and cutting the subtitle picture according to the position of a display module corresponding to the video sending module on the LED spliced screen, the offset reference position and the stepping length for the multiframe picture with the ith interval frame number of the sub-video, and overlapping the cut subtitle picture on the multiframe picture with the ith interval frame number of the sub-video, so that the complete subtitle picture is offset from the offset reference position of the LED spliced screen by the stepping length, wherein the offset reference position is the position of the subtitle picture in the multiframe picture with the ith-1 interval frame number of the video, and i is an integer greater than 1.
Specifically, the start coordinate and the end coordinate in the above steps are based on an LED tiled screen composed of a plurality of display modules, and the coordinate of the start coordinate on the display module can be determined according to the position of each display module on the LED tiled screen.
Further, the dynamic display of the present invention supports both cross-screen horizontal scrolling (e.g., FIG. 6) and cross-screen vertical scrolling (e.g., FIG. 7). In each iteration of the subtitles rolling in the transverse direction, the field programmable gate array of each video sending module acquires subtitle pictures 230 with the same width from the random access memory, and the subtitle pictures are cut according to the parameters, superimposed on the video and displayed on each display module, so that the subtitles can transversely roll across screens on the LED tiled screen 200. And the subtitles rolling in the cross-screen longitudinal direction are cut according to the parameters and then are superimposed into the video and displayed on each display module by the field programmable gate array of each video sending module to obtain subtitle pictures 230 with the same height from the random access memory during each iteration, so that the cross-screen longitudinal rolling of the subtitles is realized on the LED spliced screen 200.
In some variations of the present invention, a background bar having a width suitable for the subtitle picture may be determined by the fpga of each video sending module according to the start coordinate (in other words, the width of the background bar may be equal to the width of the subtitle picture and may be slightly greater than the width of the subtitle picture or other set width), and the fpga of each video sending module controls the subtitle picture to step transversely on the background bar according to the number of the interval frames and the step length, and the subtitle picture and the background bar are cut and then superimposed onto the video picture to implement transverse scrolling. Likewise, vertical scrolling may also be performed in the same manner.
In the above embodiment, the present invention may further implement the subtitle background 220, the position of the subtitle background 220 and the display attribute of the subtitle background may be determined by parameters input by the control module, the field programmable gate array of each video sending module directly processes the video to implement the subtitle background 220, and the subtitle picture 230 may be superimposed on the subtitle background 220. The color of the subtitle background 220 (including transparency), the width and height of the subtitle background 220 may be set. In some implementations of the invention, the font size may also be recommended according to the set width and height of the subtitle background 220, for example, the size of the font size recommended by the subtitle displayed horizontally according to the height of the subtitle background 220; the size of the subtitle is recommended according to the width of the subtitle background 220 for the vertical display, which is not described herein.
Therefore, in the subtitle display device for the LED spliced screen, the original video sending equipment in the display device is adopted for displaying the subtitle with the image overlapped, and hardware equipment is not required to be added while the subtitle is displayed. Meanwhile, the method can support a plurality of video sending devices and LED spliced screens, cross-screen display at any position in the transverse direction, the longitudinal direction or any other direction, and dynamic subtitle display in the transverse direction, the longitudinal direction or any other direction, so that the rolling consistency is improved, and the use and the deployment are simplified.
The invention can realize the caption display device for the LED spliced screen by software, hardware, firmware and any combination thereof. Fig. 1 and 3 are only schematic illustrations of the subtitle display apparatus for LED tiled screens provided by the present invention, and the splitting, merging and adding of modules are within the scope of the present invention without departing from the concept of the present invention.
The following describes a subtitle display method for an LED tiled screen according to the present invention with reference to fig. 8. The subtitle display method for the LED spliced screen comprises the following steps:
step S310: the control module receives subtitle information, wherein the subtitle information comprises subtitle content, subtitle attributes and subtitle display attributes, and generates a subtitle picture based on the subtitle content and the subtitle attributes;
Step S320: the control module sends the subtitle picture and the subtitle display attribute to a video sending module;
step S330: the video sending module receives the subtitle picture and the subtitle display attribute sent by the control module and superposes the subtitle picture on a picture of a corresponding frame of a video based on the subtitle display attribute;
Step S340: the video sending module sends the video overlapped by the subtitles to an LED spliced screen;
step S350: and the LED spliced screen receives and displays the video which is sent by the video sending module and is superposed by the subtitles.
Therefore, in the subtitle display method for the LED spliced screen, the original video sending equipment in the display device is adopted for displaying the subtitle with the image overlapped, and hardware equipment is not required to be added while the subtitle is displayed. Meanwhile, the method can support a plurality of video sending devices and LED spliced screens, cross-screen display at any position in the transverse direction, the longitudinal direction or any other direction, and dynamic subtitle display in the transverse direction, the longitudinal direction or any other direction, so that the rolling consistency is improved, and the use and the deployment are simplified.
in some embodiments of the present invention, the display device for an LED tiled screen includes a plurality of display modules, the number of the video sending modules corresponds to the number of the display modules one to one, the display modules form an LED tiled screen to jointly display a video, each display module synchronously displays sub-videos so that the sub-videos jointly form the video according to positions of the display modules on the LED tiled screen, the subtitle display attribute at least includes a subtitle display mode, the subtitle display mode is static display or dynamic display, if the subtitle display mode is dynamic display, the subtitle display attribute further includes a start coordinate and a display speed on the LED tiled screen formed by the display modules, and each video sending module executes the following steps:
Determining the step length and the interval frame number in a preset corresponding relation according to the display speed;
Starting from a start frame picture of a subtitle determined to be superposed in a sub video to be played by a display module corresponding to the video sending module, cutting the subtitle picture according to the position of the display module corresponding to the video sending module on the LED splicing screen and the start position of a multi-frame picture of the sub video with the 1 st interval frame number, superposing the cut subtitle picture on the multi-frame picture of the sub video with the 1 st interval frame number, and enabling the complete subtitle picture to be located at the start coordinate of the LED splicing screen;
and cutting the subtitle picture according to the position of a display module corresponding to the video sending module on the LED spliced screen, the offset reference position and the stepping length for the multiframe picture with the ith interval frame number of the sub-video, and overlapping the cut subtitle picture on the multiframe picture with the ith interval frame number of the sub-video, so that the complete subtitle picture is offset from the offset reference position of the LED spliced screen by the stepping length, wherein the offset reference position is the position of the subtitle picture in the multiframe picture with the ith-1 interval frame number of the video, and i is an integer greater than 1.
Therefore, the algorithm is realized in the video sending module, additional video processing equipment is not needed, the subtitle pictures are dynamically superposed on the video through the algorithm, the algorithm is simple, the calculated amount is small, and the requirement on a system is low. On the other hand, the dynamic display of the caption pictures on the LED spliced screen is realized according to the algorithm, the caption stepping direction is not required to be limited, and for example, the horizontal dynamic display, the vertical dynamic display or other dynamic displays inclined to the horizontal/vertical direction can be realized. The display device can support a plurality of video sending devices, a plurality of display modules, cross-screen display at any position in the transverse direction, the longitudinal direction or other directions, and dynamic display of subtitles in the transverse direction, the longitudinal direction or other directions, and the display modules are decoupled from each other to avoid mutual influence, so that the scrolling consistency is improved, and the use and the deployment are simplified.
The subtitle display method of the present invention is described above only schematically, and the present invention is not limited thereto.
In an exemplary embodiment of the present disclosure, a computer-readable storage medium is also provided, on which a computer program is stored, which when executed by, for example, a processor, may implement the steps of the subtitle display method described in any one of the above embodiments. In some possible embodiments, aspects of the invention may also be implemented in the form of a program product comprising program code for causing a terminal device to perform the steps according to various exemplary embodiments of the invention described in the subtitle display method section above of this specification, if the program product is run on the terminal device.
Referring to fig. 9, a program product 800 for implementing the above method according to an embodiment of the present invention is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited in this regard and, in the present document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The computer readable storage medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable storage medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the tenant computing device, partly on the tenant device, as a stand-alone software package, partly on the tenant computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing devices may be connected to the tenant computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
In an exemplary embodiment of the present disclosure, there is also provided an electronic device, which may include a processor, and a memory for storing executable instructions of the processor. Wherein the processor is configured to execute the steps of the subtitle display method according to any one of the above embodiments via executing the executable instructions.
As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method or program product. Thus, various aspects of the invention may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
An electronic device 600 according to this embodiment of the invention is described below with reference to fig. 10. The electronic device 600 shown in fig. 10 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.
as shown in fig. 10, the electronic device 600 is embodied in the form of a general purpose computing device. The components of the electronic device 600 may include, but are not limited to: at least one processing unit 610, at least one storage unit 620, a bus 630 that connects the various system components (including the storage unit 620 and the processing unit 610), a display unit 640, and the like.
Wherein the storage unit stores program code executable by the processing unit 610 to cause the processing unit 610 to perform steps according to various exemplary embodiments of the present invention described in the subtitle display method section above in this specification. For example, the processing unit 610 may perform the steps as shown in fig. 8.
The storage unit 620 may include readable media in the form of volatile memory units, such as a random access memory unit (RAM)6201 and/or a cache memory unit 6202, and may further include a read-only memory unit (ROM) 6203.
the memory unit 620 may also include a program/utility 6204 having a set (at least one) of program modules 6205, such program modules 6205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
Bus 630 may be one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.
The electronic device 600 may also communicate with one or more external devices 700 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a tenant to interact with the electronic device 600, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 600 to communicate with one or more other computing devices. Such communication may occur via an input/output (I/O) interface 650. Also, the electronic device 600 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the Internet) via the network adapter 660. The network adapter 660 may communicate with other modules of the electronic device 600 via the bus 630. It should be appreciated that although not shown, other hardware and/or software modules may be used in conjunction with the electronic device 600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, or a network device, etc.) to execute the above-mentioned subtitle display method according to the embodiments of the present disclosure.
Therefore, compared with the prior art, the scheme provided by the invention has the following advantages:
The original video sending equipment in the display device is adopted to display the subtitle with the overlapped image, and hardware equipment is not required to be added while the subtitle display is realized. Meanwhile, the method can support a plurality of video sending devices and LED spliced screens, cross-screen display at any position in the transverse direction, the longitudinal direction or any other direction, and dynamic subtitle display in the transverse direction, the longitudinal direction or any other direction, so that the rolling consistency is improved, and the use and the deployment are simplified.
other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A subtitle display apparatus for an LED tiled screen, comprising:
The control module is used for receiving subtitle information, wherein the subtitle information comprises subtitle content, subtitle attributes and subtitle display attributes, and generating a subtitle picture based on the subtitle content and the subtitle attributes;
The video sending module is used for receiving the subtitle picture and the subtitle display attribute sent by the control module and superposing the subtitle picture on a picture of a corresponding frame of a video based on the subtitle display attribute; and
and the LED spliced screen is used for receiving and displaying the video which is sent by the video sending module and is superposed by the subtitles.
2. the subtitle display apparatus of claim 1, wherein the video transmission module comprises:
The reading and writing module is used for receiving the subtitle picture and the subtitle display attribute sent by the control module, writing the subtitle picture and the subtitle display attribute sent by the control module into the first storage module, and reading the subtitle picture and the subtitle display attribute from the first storage module;
And the processing module is used for receiving the subtitle picture and the subtitle display attribute read by the reading and writing module from the first storage module and superposing the subtitle picture on a picture of a corresponding frame of a video based on the subtitle display attribute read by the reading and writing module from the first storage module.
3. The subtitle display apparatus of claim 2, wherein the video transmission module further comprises:
The second storage module is used for caching the subtitle picture and the subtitle display attribute read by the reading and writing module received by the processing module from the first storage module and providing the processing module for reading the subtitle picture and the subtitle display attribute cached by the second storage module, and the second storage module is a random access memory.
4. the subtitle display apparatus of claim 2, wherein the processing module is a field programmable gate array.
5. The subtitle display apparatus according to claim 1, wherein the subtitle display attribute includes at least a subtitle display mode, the subtitle display mode being either static display or dynamic display;
If the subtitle display mode is static display, the subtitle display attribute further comprises a static coordinate of the subtitle display position, and the video sending module superposes the subtitle picture on the position of the static coordinate on the picture of the corresponding frame of the video according to the static coordinate;
If the subtitle display mode is dynamic display, the subtitle display attributes further comprise an initial coordinate and a display speed, and the video sending module executes the following steps:
determining the step length and the interval frame number in a preset corresponding relation according to the display speed;
Starting from a starting frame picture for determining the superposition of the caption in the video, superposing the caption picture on a multiframe picture with the 1 st interval frame number of the multiframe picture of the video, wherein the caption picture is positioned at the starting coordinate;
And for the multi-frame picture with the i-th interval frame number, superposing the subtitle picture on the multi-frame picture with the i-th interval frame number of the video, wherein the subtitle picture deviates from the deviation reference position by the stepping length, the deviation reference position is the position of the subtitle picture in the multi-frame picture with the i-1-th interval frame number, and i is an integer greater than 1.
6. The caption display device according to claim 1, wherein the LED tiled screen includes a plurality of display modules, the number of the video sending modules corresponds to the display modules one to one, and each of the video sending modules further cuts the caption picture according to the position of the corresponding display module on the plurality of display modules, and superimposes the cut caption picture on the picture of the corresponding frame of video to be displayed by the corresponding display module.
7. A subtitle display method for an LED (light emitting diode) spliced screen is characterized by comprising the following steps:
the control module receives subtitle information, wherein the subtitle information comprises subtitle content, subtitle attributes and subtitle display attributes, and subtitle pictures are generated based on the subtitle content and the subtitle attributes;
The control module sends the subtitle picture and the subtitle display attribute to a video sending module;
The video sending module receives the subtitle picture and the subtitle display attribute sent by the control module and superposes the subtitle picture on a picture of a corresponding frame of a video based on the subtitle display attribute;
The video sending module sends the video overlapped by the subtitles to an LED spliced screen;
And the LED spliced screen receives and displays the video which is sent by the video sending module and is superposed by the subtitles.
8. the subtitle display method according to claim 7, wherein the LED mosaic screen includes a plurality of display modules, the number of the video transmission modules corresponds to one of the display modules, the plurality of display modules form the LED mosaic screen to collectively display a video, each of the display modules synchronously displays sub-videos such that the sub-videos collectively constitute the video according to positions of the display modules on the LED mosaic screen,
the superimposing the subtitle picture onto the picture of the corresponding frame of the video based on the subtitle display attribute comprises:
determining the step length and the interval frame number in a preset corresponding relation according to the display speed;
Starting from a start frame picture of a subtitle determined to be superposed in a sub video to be played by a display module corresponding to the video sending module, cutting the subtitle picture according to the position of the display module corresponding to the video sending module on the LED splicing screen and the start position of a multi-frame picture of the sub video with the 1 st interval frame number, superposing the cut subtitle picture on the multi-frame picture of the sub video with the 1 st interval frame number, and enabling the complete subtitle picture to be located at the start coordinate of the LED splicing screen;
And cutting the subtitle picture according to the position of a display module corresponding to the video sending module on the LED spliced screen, the offset reference position and the stepping length for the multiframe picture with the ith interval frame number of the sub-video, and overlapping the cut subtitle picture on the multiframe picture with the ith interval frame number of the sub-video, so that the complete subtitle picture is offset from the offset reference position of the LED spliced screen by the stepping length, wherein the offset reference position is the position of the subtitle picture in the multiframe picture with the ith-1 interval frame number of the video, and i is an integer greater than 1.
9. An electronic device, characterized in that the electronic device comprises:
A processor;
storage medium having stored thereon a computer program which, when being executed by the processor, performs the subtitle display method according to claim 7 or 8.
10. A storage medium having stored thereon a computer program for executing the subtitle display method according to claim 7 or 8 when executed by a processor.
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| CN201910932856.5A CN110557578A (en) | 2019-09-29 | 2019-09-29 | Subtitle display device and method for LED spliced screen and related equipment |
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Application publication date: 20191210 |