CN110581962A - television wall image redisplay method, service board and distributed television wall system - Google Patents

television wall image redisplay method, service board and distributed television wall system Download PDF

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Publication number
CN110581962A
CN110581962A CN201810578987.3A CN201810578987A CN110581962A CN 110581962 A CN110581962 A CN 110581962A CN 201810578987 A CN201810578987 A CN 201810578987A CN 110581962 A CN110581962 A CN 110581962A
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China
Prior art keywords
output
target
board
video
service board
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Granted
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CN201810578987.3A
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Chinese (zh)
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CN110581962B (en
Inventor
夏超伟
陈王贤
宋义
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Hangzhou Hikvision Digital Technology Co Ltd
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Hangzhou Hikvision Digital Technology Co Ltd
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Priority to CN201810578987.3A priority Critical patent/CN110581962B/en
Priority to PCT/CN2019/088808 priority patent/WO2019233314A1/en
Publication of CN110581962A publication Critical patent/CN110581962A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • 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
    • 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
    • H04N5/2624—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 for obtaining an image which is composed of whole input images, e.g. splitscreen
    • 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
    • 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
    • H04N5/268—Signal distribution or switching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The embodiment of the invention provides a television wall image redisplay method, a service board and a distributed television wall system, wherein the method comprises the following steps: the service board obtains the playback instruction, determines the target television wall according to the playback instruction, and sends a control instruction to a target output board of the target television wall, so that the target output board sends video information output to each display unit in the target television wall to the service board, and the service board combines multiple paths of video information into one path of playback information and then outputs the playback information, thereby realizing the playback of the television wall image in the target television wall. In the embodiment of the invention, the service board can obtain the echoed images of the target television wall from the plurality of television walls according to the echoed instructions, so that the television wall image echoing method provided by the embodiment of the invention can be applied to a distributed television wall system with a plurality of television walls, and the problem that the distributed television wall system cannot realize the echoing function in the prior art is solved.

Description

television wall image redisplay method, service board and distributed television wall system
Technical Field
The invention relates to the technical field of video monitoring equipment, in particular to a video wall image redisplay method, a service board and a distributed video wall system.
Background
in the field of video surveillance, a video wall is increasingly used, and the video wall is formed by splicing and combining a plurality of displays, such as a Light Emitting Diode (LED) Display or a Liquid Crystal Display (LCD) Display. Each display on the television wall can independently display one path of video image, or can be combined together through the displays on the television wall to display one path of video image. The television wall can support various functions such as window roaming, split screen, zooming and the like. And the user can more conveniently view multiple paths of video images.
in practical use, the video wall needs to be capable of implementing a playback function, where playback refers to a video image displayed on the video wall and can be transmitted to other terminal devices, such as a computer. The video images displayed on the television wall can be synchronously seen through the terminal equipment. By utilizing the back display function, the video images displayed on the television wall can be checked through the terminal equipment, the video images displayed on the television wall can be better controlled, and the requirements of various services are met.
with the advance of technology, a distributed television wall system is generated, i.e. a plurality of television walls can be distributed at different positions, for example, a plurality of television walls can be distributed at a plurality of monitoring centers, and each monitoring center can separately control one television wall to display video images. With the application of the distributed tv wall system, it is more and more important to uniformly schedule and control a plurality of distributed tv walls. Among them, it is the most critical to implement the playback function in the distributed tv wall system.
however, in the existing solutions for enabling the video wall playback, the video images displayed on a single video wall can be played back only through the control device of the single video wall. Since the control device of a single tv wall cannot control a plurality of distributed tv walls, for example, a Field-Programmable gate array (FPGA) controller connected to the tv wall sends spliced video images being output to the tv wall to the terminal device synchronously, thereby implementing a playback function. However, the existing control device for a single television wall cannot be applied to a distributed television wall system, cannot realize uniform scheduling and control over a plurality of television walls, and cannot further realize the playback function of a plurality of distributed television walls. Therefore, how to implement the playback function for a plurality of distributed television walls becomes a problem to be solved urgently in the industry.
disclosure of Invention
The embodiment of the invention aims to provide a video wall image playback method, a service board and a distributed video wall system, so as to realize the playback function in the distributed video wall system. The specific technical scheme is as follows:
the embodiment of the invention provides a video wall image redisplay method, which is applied to a service board, wherein the service board is connected with a plurality of output boards, the output boards are respectively connected with a plurality of video walls, the service board is used for acquiring video information output to the video walls by the output boards, and the video wall image redisplay method comprises the following steps:
acquiring a playback instruction, wherein the playback instruction comprises an identifier of a target television wall to be played back;
According to the identification of the target television wall to be displayed back, sending a control instruction to a target output board connected with the target television wall, wherein the target output board is provided with a plurality of output ports, each output port is connected with one display unit in the target television wall and outputs one path of video information to the display unit, and the control instruction is used for instructing the target output board to send the multiple paths of video information of each output port to the service board;
Respectively receiving the multi-channel video information sent by the target output board;
Combining the multiple paths of video information into one path of echoed information;
and outputting the echoed information.
Optionally, if there are a plurality of target output boards connected to the target television wall, the sending a control instruction to the target output board connected to the target television wall includes:
and synchronously sending the control instruction to a plurality of target output boards connected with the target television wall.
optionally, the respectively receiving the multiple paths of video information sent by the target output board includes:
Receiving the encoded multi-channel video code streams sent by the target output board respectively;
The combining the multiple paths of video information into one path of echoed information comprises:
Respectively decoding the multiple paths of video code streams;
splicing images formed by the decoded video code streams to form a playback image;
The outputting the echoed information comprises:
and outputting the echo image.
optionally, before sending the control instruction to the target output board connected to the target video wall, the method further includes:
for each output port in the target output board, determining the relative position of a display unit connected with the output port in the target television wall, and taking the relative position as the corresponding relative position of the output port;
And sending the relative position corresponding to each output port and a preset image size to the target output board so that the target output board encodes the video information of each output port according to the relative position and the preset image size to form the multi-path encoded video code stream, wherein the preset image size is the size of an image formed by decoding one path of the video code stream.
Optionally, the method further includes:
And dividing the resolution in the width direction and the resolution in the height direction in the preset echoed image resolution by the number of the horizontal display units and the number of the vertical display units in the target television wall respectively to obtain the preset image size.
Optionally, the splicing the images formed by the decoded video code streams to form a playback image includes:
and splicing images formed by decoding the video code streams corresponding to the output ports at corresponding positions according to the corresponding relative positions of the output ports to form the echo image.
optionally, before sending the control instruction to the target output board connected to the target video wall, the method further includes:
and sending a timestamp to the target output board, wherein the timestamp is used for enabling the multi-channel video code stream sent by the target output board to have a synchronous timestamp.
optionally, the outputting the echo image includes:
coding the echo image to form an echo code stream;
And outputting the echo code stream.
The embodiment of the invention provides a television wall image redisplay method, which is applied to an output board, wherein the output board is connected with a television wall, the output board is provided with a plurality of output ports, each output port is connected with one display unit in the television wall and outputs one path of video information to the display unit, and the television wall image redisplay method comprises the following steps:
Acquiring video information;
Outputting the video information to each display unit in the television wall through each output port respectively;
And if a control instruction sent by a service board is received, sending the multi-channel video information output by each output port to the service board, wherein the service board is used for acquiring the video information output to the television wall by the output board.
Optionally, the sending the multiple paths of video information output by each output port to the service board includes:
encoding the multi-path video information output by each output port to form a multi-path video code stream;
And sending the multi-path video code stream to the service board.
optionally, if the relative position and the preset image size corresponding to each port sent by the service board are received, the encoding is performed on the multiple paths of video information output by each output port to form multiple paths of video code streams, where the encoding includes:
And coding the video information of each output port according to the relative position and the preset image size to form the multi-path video code stream.
Optionally, if the timestamp sent by the service board is received, the encoding is performed on the multiple paths of video information output by the output ports to form multiple paths of video code streams, where the encoding includes:
And synchronously encoding the multi-path video information output by each output port to form the multi-path video code stream, and adding the synchronous time stamp into the multi-path video code stream.
The embodiment of the present invention further provides a service board, where the service board is connected to multiple output boards, the multiple output boards are respectively connected to multiple tv walls, the service board is configured to obtain video information output by the output boards to the tv walls, and the service board includes:
the acquisition module is used for acquiring a playback instruction, and the playback instruction comprises an identifier of a target television wall to be played back;
The synchronous sending module is used for sending a control instruction to a target output board connected with the target television wall according to the identification of the target television wall to be displayed back, the target output board is provided with a plurality of output ports, each output port is connected with one display unit in the target television wall and outputs one path of video information to the display unit, and the control instruction is used for indicating the target output board to send the multiple paths of video information of each output port to the service board;
the encoding and decoding module is used for respectively receiving the multi-channel video information sent by the target output board; combining the multiple paths of video information into one path of echoed information;
and the output module is used for outputting the echoed information.
optionally, if a plurality of target output boards are connected to the target video wall, the synchronous sending module is specifically configured to:
and synchronously sending the control instruction to a plurality of target output boards connected with the target television wall.
optionally, the encoding and decoding module is specifically configured to:
receiving the encoded multi-channel video code streams sent by the target output board respectively; respectively decoding the multiple paths of video code streams; splicing images formed by the decoded video code streams to form a playback image;
The output module is specifically configured to: and outputting the echo image.
Optionally, the service board further includes: a calculation module;
the computing module is specifically configured to determine, for each output port in the target output board, a relative position of a display unit connected to the output port in the target television wall, and use the relative position as a relative position corresponding to the output port; and sending the relative position corresponding to each output port and a preset image size to the target output board so that the target output board encodes the video information of each output port according to the relative position and the preset image size to form the multi-path encoded video code stream, wherein the preset image size is the size of an image formed by one path of video code stream.
Optionally, the service board further includes: a size calculation module;
The size calculation module is specifically configured to divide the resolution in the width direction and the resolution in the height direction in the preset resolution of the back display image by the number of the horizontal display units and the number of the vertical display units in the target television wall, respectively, to obtain the preset image size.
optionally, the encoding and decoding module is specifically configured to:
And splicing images formed by the video code streams corresponding to the output ports at corresponding positions according to the corresponding relative positions of the output ports to form the echo image.
Optionally, the synchronous sending module is further configured to:
and sending a timestamp to the target output board, wherein the timestamp is used for enabling the multi-channel video code stream sent by the target output board to have a synchronous timestamp.
optionally, the output module is specifically configured to:
coding the echo image to form an echo code stream; and outputting the echo code stream.
An embodiment of the present invention further provides an output board, where the output board is connected to a television wall, the output board has a plurality of output ports, each of the output ports is connected to one display unit in the television wall, and outputs one path of video information to the display unit, and the output board includes:
the acquisition module is used for acquiring video information;
the output module is used for outputting the video information to each display unit in the television wall through each output port;
And the coding and decoding module is used for sending the multi-channel video information output by each output port to the service board if a control instruction sent by the service board is received, and the service board is used for acquiring the video information output to the television wall by the output board.
optionally, the encoding and decoding module is specifically configured to:
Encoding the multi-path video information output by each output port to form a multi-path video code stream; and sending the multi-path video code stream to the service board.
Optionally, if the relative position and the preset image size corresponding to each port sent by the service board are received, the encoding and decoding module is specifically configured to:
and coding the video information of each output port according to the relative position and the preset image size to form the multi-path video code stream.
optionally, if the timestamp sent by the service board is received, the encoding and decoding module is specifically configured to:
And synchronously encoding the multi-path video information output by each output port to form the multi-path video code stream, and adding the synchronous time stamp into the multi-path video code stream.
The embodiment of the invention also provides a distributed television wall system, which comprises a service board, a plurality of output boards, a plurality of television walls and terminal equipment;
the service board is used for realizing any one of the television wall image playback methods applied to the service board;
Each output board in the plurality of output boards is used for realizing any one of the television wall image playback methods applied to the output boards;
The service board is respectively connected with the plurality of output boards through a network;
The output boards are respectively connected with the television walls, each output board is provided with a plurality of output ports, and each output port is connected with one display unit in the television wall and outputs one path of video information to the display unit;
the terminal equipment is connected with the service board and used for acquiring the echoing information output by the service board.
the embodiment of the invention provides a television wall image redisplay method, a service board and a distributed television wall system, wherein the service board can obtain a redisplay instruction, determine a target television wall according to the redisplay instruction, and send a control instruction to a target output board of the target television wall, so that the target output board sends video information output to each display unit in the target television wall to the service board, and the service board combines multiple paths of video information into one path of redisplay information and then outputs the redisplay information, thereby realizing the redisplay of the television wall image in the target television wall. In the embodiment of the invention, the service board can obtain the echoed images of the target television wall from the plurality of television walls according to the echoed instructions, so that the television wall image echoing method provided by the embodiment of the invention can be applied to a distributed television wall system with a plurality of television walls, and the problem that the distributed television wall system cannot realize the echoing function in the prior art is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a video wall image playback provided in an embodiment of the present invention;
Fig. 2 is a flowchart of a video wall image displaying method according to an embodiment of the present invention;
FIG. 3a is a schematic diagram of a target video wall according to an embodiment of the present invention;
fig. 3b is a schematic diagram of a mapping relationship between a target video wall and an output port according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating interaction between a service board and a target output board according to an embodiment of the present invention;
FIG. 5 is another flowchart of a video wall image displaying method according to an embodiment of the present invention;
FIG. 6 is a block diagram of a service board provided by an embodiment of the present invention;
FIG. 7 is a block diagram of an output board provided by an embodiment of the present invention;
Fig. 8 is a block diagram of a distributed tv wall system according to an embodiment of the present invention.
Detailed Description
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
the television wall image redisplay method provided by the embodiment of the invention can be applied to a distributed television wall system consisting of a service board, an output board and a plurality of distributed television walls. The output board is connected with the television wall, the distributed television wall can be composed of a plurality of television walls located at different positions, each television wall is at least connected with one output board, the output boards can acquire video information and output the video information to the display unit in the television wall through the output ports, corresponding images are displayed in the display unit, and the display unit can be an LED display or an LCD display.
the service board is used for acquiring the video information output by the output board to the television wall, and specifically, the service board can control the output board, so that the video information output by the output board to the television wall is synchronously sent to the service board while being output to the television wall. And the service board sends the received video information to the terminal to realize the display function of the television wall. Referring to fig. 1, a video wall 101 is composed of 9 display units, a1 to a9 are images displayed in the 9 display units, respectively, and the images in the 9 display units together constitute a video wall image, as shown in fig. 1, the video wall image can be displayed in a terminal device 102 by implementing a playback function through a service board.
the output boards of the plurality of television walls can be respectively connected with the service board through cables, data lines and networks, wherein the networks can comprise local area networks and the internet. The service board can control the output boards respectively and acquire the video information of the output boards respectively, so that the distributed television walls are realized, and the function of playback is realized.
the following describes the video wall image playback method provided by the embodiment of the present invention in detail with reference to the accompanying drawings.
Referring to fig. 2, fig. 2 is a flowchart of a video wall image playback method according to an embodiment of the present invention. Applied to a service panel, comprising:
Step 201, a playback instruction is obtained, and the playback instruction includes an identifier of a target television wall to be played back.
The service board may be a hardware device with audio/video data processing capability, which may include a codec chip, a control chip, a network port, and corresponding auxiliary components and circuits. The codec chip and the control chip may be chips or controllers capable of implementing data Processing, such as a CPU, a GPU (Graphic Processing Unit), an FPGA (field programmable gate array), and the like.
The service board may obtain the playback instruction in various ways, for example, send the playback instruction to the service board through a terminal device, such as a computer, a mobile phone, a tablet, and the like, which can be connected to the service board. The terminal equipment can be connected with the service board in a network mode, so that the limitation of transmission distance is eliminated, and the application of the embodiment of the invention in a distributed television wall system is facilitated. Or the echoing instruction can be directly input on the service board, or the echoing instruction can be automatically triggered by a program preset on the service board according to a certain rule.
since the distributed television wall system has a plurality of television walls, the display instruction needs to contain an identifier of a target television wall to be redisplayed, so as to specify the target television wall to be redisplayed from the plurality of television walls. The identification of the target television wall can be the number and name of the target television wall or the IP address of the target television wall in the network. The identification of the target tv wall can be used as long as the identification can be used to distinguish the target tv wall from a plurality of tv walls.
step 202, according to the identifier of the target television wall to be displayed back, sending a control instruction to a target output board connected to the target television wall, where the target output board has multiple output ports, each output port is connected to one display unit in the target television wall and outputs one path of video information to the display unit, and the control instruction is used to instruct the target output board to send multiple paths of video information of each output port to the service board.
after the service board acquires the playback instruction, the target television wall can be determined from the multiple television walls according to the identification of the target television wall in the playback instruction. Control instructions may then be sent to the target output board to which the target video wall is connected.
in practical applications, the target output board has a plurality of output ports, but the number of output ports on the target output board is smaller because the number of display units in the target video wall may be larger. Therefore, in order to allow each display unit in the target video wall to have video information input. The target tv wall may be connected with a plurality of target output boards, that is, each output port of each of the plurality of target output boards is connected to each display unit in the target tv wall, and outputs one path of video information to each display unit.
Therefore, if there are a plurality of target output boards connected to the target video wall, in this embodiment of the present invention, the step 202 of sending a control instruction to the target output board connected to the target video wall may include:
and synchronously sending a control instruction to a plurality of target output boards connected with the target television wall.
since the plurality of target output boards output the video information to the respective display units of the target video wall through the respective output ports. Therefore, in order to obtain a complete video wall image, it is necessary to synchronously send control commands to each target output board connected to the target video wall.
after receiving the control command, the output board can continue to output the video information to each display unit through each output port, and at the same time, send the video information of each output port to the service board, and one target output board has a plurality of output ports, so that a plurality of paths of video information will be sent to the service board, for example, if the output board has 3 output ports, the output board sends 3 paths of video information to the service board.
And the control instruction can enable the target output board to synchronously send the video information of each output port to the service board, so that the consistency of the images is ensured. And when the target output boards are multiple, the multiple target output boards respectively send respective multi-channel video information to the service board. Meanwhile, the control command is synchronously sent to each target output board, so that each target output board synchronously sends multi-channel video information.
And step 203, respectively receiving the multiple paths of video information sent by the target output board.
the service board may receive the multiple paths of video information sent by the target output board, and specifically, the service board may receive the multiple paths of video information through multiple receiving channels of the mounted codec chip.
In practical applications, the number of display units in a general target video wall is known. And the number of the multiple paths of video information received by the service board is the same as the number of the display units. Therefore, the service board can set the number of paths of the multi-path video information in advance before receiving the multi-path video information sent by the target output board, so that the receiving channels with the same number as the number of paths can be prepared in advance to receive the multi-path video information according to the number of paths before receiving the multi-path video information. Each path of video information is received through a receiving channel, and the received path of video information can be subsequently processed through the receiving channel.
in the distributed television wall system, the service board and the output board can be connected in a local area network or internet mode, so that various information and instructions including control instructions sent by the service board to the target output board can be sent through the network. Similarly, the target output board may send various information including multiple channels of video information to the service board through the network, and the service board may receive the multiple channels of video information sent by the target output board through the network port, and then transmit the multiple channels of video information to the multiple receiving channels of the codec chip.
And step 204, combining the multiple paths of video information into one path of echoed information.
after the service board receives the multiple paths of video information, because the multiple paths of video information are independent images and are not integrated together, the multiple paths of video information cannot be synchronously and directly output, and a terminal device receiving the video information generally has only one input port and cannot simultaneously receive the multiple paths of video information.
therefore, the service board needs to combine multiple paths of video information to form one path of playback information. The echoed information contains images of all paths of video information, namely, the images of all paths of video information are spliced and restored into a structural style of a television wall image displayed in a target television wall.
And step 205, outputting the echoed information.
after the service board combines the multiple paths of video information into one path of playback information, the playback information can be output to the terminal equipment, and the terminal equipment can be equipment such as a computer, a mobile phone, a tablet personal computer and the like, and can also be display equipment such as a display and the like.
For example, the service board may output the playback information to a display or the like through a DP (display port) interface of the service board itself. Or, the service board can also output the echoed information to equipment such as a computer, a mobile phone, a tablet computer and the like through a cable, a data line and a network.
after the terminal equipment obtains the redisplay information, the image in the highlight information can be displayed, the image is the redisplay image of the television wall image of the target television wall, and the redisplay image is completely consistent with the television wall image of the target television wall. When the target television wall is operated, for example, window roaming, zooming, split screen, source replacement, scene switching, and the like, the video information sent by the target output board of the target television wall to each display unit is changed by the operation. Similarly, when the video information sent by the target output board to each display unit changes, the multi-channel video information sent by the target output board to the service board also changes correspondingly. So that the final echoed images will also change in synchronism with the video wall images in the target video wall. The user can view the real-time television wall image in the target television wall through the terminal equipment.
In the embodiment of the invention, after the service board acquires the playback instruction, the target television wall is determined according to the playback instruction, and the control instruction is sent to the target output board of the target television wall, so that the target output board sends the video information output to each display unit in the target television wall to the service board, and the service board combines multiple paths of video information into one path of playback information and then outputs the playback information, thereby realizing the playback of the television wall image in the target television wall. In the embodiment of the invention, the service board can obtain the echoed images of the target television wall from the plurality of television walls according to the echoed instructions, so that the television wall image echoing method provided by the embodiment of the invention can be applied to a distributed television wall system with a plurality of television walls, and the problem that the distributed television wall system cannot realize the echoing function in the prior art is solved.
in combination with the above embodiments, in practical application, in order to make the transmission of video information between the target output board and the service board more efficient. After receiving the control instruction, the target output board can encode the multiple paths of video information respectively and then send the multiple paths of video information to the service board.
Specifically, the target output board encodes the multiple paths of video information, and the video information may be encoded by using an encoding method such as h.264 or h.265. After the multi-channel video information is coded, multi-channel video code streams can be obtained. Then, the multi-path video code streams are synchronously sent to the service board.
Correspondingly, in the method for displaying back images on a tv wall according to the embodiment of the present invention, step 203, respectively receiving multiple channels of video information sent by a target output board, includes:
and respectively receiving the encoded multi-path video code streams sent by the target output board.
When the target output board encodes multiple paths of video information and multiple paths form video code streams, the corresponding service board receives the multiple paths of video code streams. The same procedure as in the above embodiment, the service board may receive the multiple paths of audio/video code streams through multiple receiving channels of the mounted codec chip.
correspondingly, in this embodiment of the present invention, in step 204, combining multiple channels of video information into one channel of playback information may include:
and step 204a, respectively decoding the multiple paths of video code streams.
after the service board receives the multiple paths of video code streams, the multiple paths of video code streams can be decoded respectively. Specifically, the process of the service board decoding the multiple paths of video code streams can be realized through the carried coding and decoding chip. The coding and decoding chip receives a plurality of receiving channels of the video code stream and can be used as decoding channels to respectively decode the received multi-channel video code stream.
and step 204b, splicing images formed by the decoded video code streams to form a playback image.
And each decoded video code stream can form an image which can be directly displayed. In practical application, the multiple video code streams sent by the target output board are continuous data streams. And the service board receives and decodes the continuous multi-channel video code streams while receiving the continuous multi-channel video code streams, and then images formed by the decoded video code streams are spliced according to the original structural position of the television wall image in the target television wall to form a real-time echoed image. The above process is a dynamic process, and is synchronously performed in real time, so that the echo image and the television wall image in the target television wall are kept synchronous and consistent.
Specifically, the service board splices images formed by each video code stream, and the splicing can be realized by a coding and decoding chip carried by the service board. The coding and decoding chip can be specially distributed with a code combining channel which can carry out code combining operation on a plurality of paths of video code streams decoded by a plurality of decoding channels, thereby realizing splicing of images formed by the video code streams and forming a playback image.
Correspondingly, in the embodiment of the present invention, in step 205, outputting the echo information includes: and outputting a return display image.
The service board can output the obtained echo image in real time. And directly outputting the data to display equipment through a DP interface. So that the echoed images can be displayed in real time by the display device. The video wall images displayed in real time in the target video wall can be viewed through the redisplay images.
In another implementation manner of the embodiment of the present invention, the service board may output the obtained echoed images to a computer, a mobile phone, or other terminal devices in real time. Then, the terminal device may not be connected to the service board through a video line, so that a playback image cannot be obtained directly. For example, a terminal device such as a mobile phone or a computer may be connected to the service board through a local area network or the internet. The service board needs to output the echoed images to the mobile terminal through the network. Therefore, in the embodiment of the present invention, outputting the echo image may include:
Firstly, coding a playback image to form a playback code stream.
And step two, outputting the echo code stream.
The echoed images can not be directly transmitted through a network, so the echoed images need to be encoded again, and the encoding mode can be any encoding mode of the silkworm pupae, such as H.264, H.265 and the like. And coding the echo image generated in real time to form a real-time echo code stream.
And then the echo code stream is transmitted to terminal equipment such as a computer, a mobile phone and the like through a network, a data line, a cable and the like. And after the terminal equipment obtains the echo code stream, decoding the echo code stream again to obtain an echo image which can be directly displayed.
the echoed images are encoded to form echoed code streams, so that the echoed code streams can be output to the terminal equipment in a network or the like. The terminal equipment can obtain the echoed images of the target television wall in the forms of network and the like, thereby being more beneficial to applying the television wall image echoing method provided by the embodiment of the invention in a distributed television wall system.
with reference to the foregoing embodiments, in the video wall image display method according to the embodiments of the present invention, in step 202, before sending a control instruction to a target output board connected to a target video wall, the method further includes:
Step 210, for each output port in the target output board, determining a relative position of the display unit connected to the output port in the target television wall, and taking the relative position as a corresponding relative position of the output port.
Each output port in the target output board is connected to one display unit in the target television wall, and the display units in the target television wall are arranged according to a certain rule, so that the target television wall is formed. Therefore, the display unit to which each output port is connected has a fixed relative position in the target video wall. I.e. the image formed by the video information output by each output port to the display unit, also has its fixed relative position in the target video wall.
In order to enable the target output board to encode the multiple paths of video information of the output ports with reference to the relative position when encoding the multiple paths of video information in the subsequent steps. The corresponding relative position of each output port in the target television wall may be determined first.
Specifically, referring to fig. 3a and 3b, fig. 3a is a schematic diagram of a target video wall, and it can be seen that the target video wall has 9 display units. If one target output board has two output ports, the number of the target output boards connected with the target television wall is at least 5, wherein all two output ports of 4 target output boards are connected to the display unit, and only one output port of the other 1 target output board needs to be connected.
The display unit connected to each output port of each target output board is preset, so that a mapping between the output ports and the target tv wall as shown in fig. 3b can be obtained. In fig. 3b, output port 1-1 represents a first output port of a first destination output board, output port 1-2 represents a second output port of the first destination output board, output port 2-1 represents a first output port of a second destination output board, output port 2-2 represents a second output port of the second destination output board, and so on. With reference to fig. 3a and 3b, the relative position of the display unit connected to each output port in the target tv wall can be determined, so as to determine the corresponding relative position of each output port.
And step 211, sending the relative position corresponding to each output port and the preset image size to a target output board, so that the target output board encodes the video information of each output port according to the relative position and the preset image size to form a plurality of paths of encoded video code streams, wherein the preset image size is the size of an image formed by decoding one path of video code stream.
and the service board determines the corresponding relative position of each output port of the target output board. The relative position corresponding to each output port and the preset image size can be sent to the target output boards, and when the target output boards are multiple, the relative positions corresponding to the output ports of the target output boards can be sent to the target output boards respectively.
When the target television wall displays the television wall image, the image size of each path of video information is adapted to the size and the resolution of the display unit. However, if each path of video information is directly encoded. The size and resolution of the echoed images finally obtained by the service board are still adapted to the size and resolution of the display units in the target television wall. When the echoed images need to be displayed on a display device with a small size, such as a computer display, a mobile phone and the like, the service board needs to scale the spliced echoed images so as to adapt to the size and the resolution of a screen in the terminal device. The scaling process is resource consuming and reduces the operating efficiency of the service board.
Therefore, a preset image size, which is an image size suitable for the size and resolution of the screen of the terminal device, may be preset at the service panel. When the target output board codes each path of video information according to the preset image size, after the images formed by decoding each path of video code stream are spliced to form the playback images, the playback images do not need to be zoomed and can be directly displayed in the screen of the terminal equipment. Therefore, the consumption of the service board resources is reduced, and the operating efficiency of the service board is improved.
After the relative position corresponding to each output port and the preset image size are sent to the target output board, the target output board can encode the video information of each output port according to the relative position corresponding to each output port and the preset image size, so that the encoded video code stream is adaptive to the relative position corresponding to each output port and the preset image size, the service board can decode and splice multiple paths of video code streams more conveniently and quickly, and the efficiency of the service board is improved.
with reference to the above embodiment, optionally, in the video wall image playback method provided in the embodiment of the present invention, the method may further include: and dividing the resolution in the width direction and the resolution in the height direction in the preset echoed image resolution by the number of the horizontal display units and the number of the vertical display units in the target television wall respectively to obtain a preset image size.
the display-back image formed by the service board is finally required to be displayed on the terminal device, before the service board executes the television wall image display-back method provided by the embodiment of the invention, the terminal device required to be displayed by the final display-back image can be determined in advance, for example, the display-back image can be shown to be displayed on the computer by sending a display-back instruction to the service board through the computer. Therefore, the service board can determine the resolution of the echoed images to be displayed by the terminal equipment, and the resolution can be used as the preset echoed image resolution. For example, when the terminal device sends the playback instruction to the service board, the terminal device may simultaneously select the resolution of the final playback image and send the resolution to the service board, and the service board may use the resolution as the preset playback image resolution.
the preset echoed image resolution includes a width-directional resolution and a height-directional resolution, and if the preset echoed image resolution is 1920 × 1080, the width-directional resolution is 1920 and the height-directional resolution is 1080.
the number of horizontal display units and the number of vertical display units in the target video wall are known parameters, for example, as shown in fig. 3a, the number of display units and the number of vertical display units are both 3.
the resolution in the width direction and the resolution in the height direction in the preset echoed image resolution are divided by the number of the horizontal display units and the number of the vertical display units in the target television wall respectively, so that the resolution of an image formed after each path of video code stream is decoded in the echoed image displayed in the terminal equipment can be determined, and the resolution can be used as the preset image size. For example, in connection with the above example, it is calculated that: (1920/3) × (1080/3) × 640 × 360. The final 640 x 360 may be the preset image size. In the calculation process, if the division is not complete, the remainders are all filled into the last column or row, or the remainder can be directly rounded.
With reference to the foregoing embodiments, if the service board determines the relative position corresponding to each output port of the target output board, in the video wall image playback method provided in the embodiment of the present invention, step 204b, splicing images formed by decoded video code streams to form a playback image may include:
And according to the relative position corresponding to each output port, splicing images formed by decoding each path of video code stream corresponding to each output port at the corresponding position to form a echoed image.
After the video information of each output port of the target output board is coded, a video code stream can be formed. The video code stream can form a corresponding image after being decoded.
in order to make the echoed images completely consistent with the displayed video wall images of the target video wall. Therefore, when images formed after decoding the video code streams are spliced, the images need to be spliced according to the positions in the video wall images corresponding to the images. The relative position corresponding to each output port may indicate the relative position of the display unit connected to the output port in the target video wall, or may indicate the relative position of an image formed by the video information of the output port in the target video wall. Therefore, the image formed by decoding the video code stream encoded by the video information at the output port also has the relative position in the playback image.
therefore, after images formed by decoding the video code streams corresponding to the output ports are spliced according to the corresponding relative positions of the output ports, the obtained playback images can be kept consistent with the positions of the television wall images, and therefore users can often see the playback images consistent with the television wall images. And the corresponding relative positions of the output ports are spliced, so that the processing process of image splicing of the service board is simplified, and the efficiency of the service board is further improved.
With reference to the foregoing embodiments, in the video wall image display method according to the embodiments of the present invention, before sending the control instruction to the target output board connected to the target video wall in step 202, the method further includes:
And step 213, sending a timestamp to the target output board, wherein the timestamp is used for enabling the multiple video code streams sent by the target output board to have synchronous timestamps.
Before sending a control instruction to the target output board, the service board can also send a timestamp to the target output board, and the timestamp can be used for enabling multiple paths of video code streams sent by the target output board to have synchronous timestamps, so that the time consistency of the multiple paths of video code streams is ensured. When the target output board is a plurality of boards, consistency among the plurality of target output boards can be ensured.
and the target output board encodes the channel video of each output port according to the time stamp, and adds a synchronous time stamp into the encoded multi-channel video code stream. When the target output board receives the control instruction, the multi-channel video code stream can be sent to the service board, and after the multi-channel video code stream is decoded by the service board, images formed by the decoded video code streams can be synchronously spliced and output or displayed according to the time stamps in the multi-channel video code stream.
The specific process may be as shown in fig. 4, which includes:
Step 401, the service board sends a timestamp to the target output board.
The service board can enable the target output board to be in a synchronous locking state by sending the time stamp to the target output board, and the synchronous locking state means that the target output board keeps the time of the video information of each output port consistent. When the target output boards are multiple, the time of the video information of each output port of the multiple target output boards is kept consistent.
Step 402, the target output board sends confirmation information to the service board.
after the target output board obtains the timestamp, confirmation information for confirming that the target output board is in the synchronous locking state can be sent to the service board.
And step 403, the service board sends a control instruction to the target output board.
and step 404, the target output board sends the multi-path video code stream to the service board.
and after receiving the control instruction, the target output board synchronously encodes the video information of each output port, adds a synchronous timestamp into the video code stream, and then synchronously sends the video information to the service board.
in the embodiment of the invention, the time stamp is sent to the target output board, so that the target output board can be further ensured to synchronously encode and synchronously send the video information of each output port. The consistency of the multi-path video code streams on time is ensured, so that the consistency of the final echo image is ensured.
referring to fig. 5, fig. 5 is another flowchart of a video wall image display method according to an embodiment of the present invention, applied to an output board, including:
Step 501, video information is acquired.
the video information received by the output board can be one or more paths. There are various ways for the output board to obtain the video information, for example, by means of network transmission, a video code stream transmitted by the network camera is directly obtained, and then the video code stream is decoded to obtain the video information.
Or, the corresponding Video information may also be accessed through a Video line through a Video Interface, such as a DVI (Digital Visual Interface), a VGA (Video Graphics Array, Video book output Interface), an HDMI (High definition multimedia Interface, or the like).
step 502, outputting the video information to each display unit in the video wall through each output port.
The output board receives the video information, transmits the video information to the display units connected with the output ports through the output ports, and displays corresponding images in the display units.
Step 503, if a control instruction sent by the service board is received, sending the multiple paths of video information output by each output port to the service board, where the service board is used to obtain the video information output by the output board to the television wall.
When the output board receives the control instruction sent by the service board, the output board synchronously sends each path of video information which is being output to the television wall to the service board while continuously outputting the video information to each display unit in the television wall.
Optionally, in the method for displaying an image back on a television wall according to the embodiment of the present invention, step 503 is to send the multiple paths of video information output by each output port to the service board, and the method may include:
Step 503a, encoding the multiple paths of video information output by each output port to form multiple paths of video code streams.
and step 503b, sending the multiple paths of video code streams to a service board.
In order to enable the video information to be more effectively transmitted to the service board and to use a transmission mode of network transmission, the output board needs to encode multiple paths of video information so as to form multiple paths of video code streams; the encoded video code stream is then sent to the service board.
Optionally, in the video wall image playback method provided in the embodiment of the present invention, if the relative position and the preset image size corresponding to each port sent by the service board are received, step 503a, encoding the multiple paths of video information output by each output port to form multiple paths of video code streams, which may include:
And coding the video information of each output port according to the relative position and the preset image size to form a plurality of paths of video code streams.
The output board respectively encodes the multi-channel video information according to the relative position and the preset image size, so that images formed by the multi-channel video code streams can be spliced by the service board to form a back display image which can be directly displayed on the terminal equipment, and the back display image does not need to be zoomed by the service board, thereby improving the efficiency of the service board.
optionally, in the method for displaying back a video wall image provided in the embodiment of the present invention, if a timestamp sent by the service board is received, step 503a is performed to encode the multiple paths of video information output by each output port to form multiple paths of video code streams, which may include:
And synchronously encoding the multi-path video information output by each output port to form a multi-path video code stream, and adding a synchronous timestamp into the multi-path video code stream.
The output board receives the time stamp sent by the service board, and can synchronously encode the video information of each output port according to the time stamp, so that the uniformity and consistency of the time of the multi-path video code stream are ensured. And when encoding, the time stamp can be added into the video code stream, so that the service board can synchronously perform image splicing and synchronous display or output according to the time stamp.
referring to fig. 6, fig. 6 is a structural diagram of a service board according to an embodiment of the present invention. The service board is connected with a plurality of output boards, a plurality of output boards are connected with a plurality of television walls respectively, the service board is used for obtaining the video information that the output board exported to the television wall, the service board includes:
an obtaining module 601, configured to obtain a playback instruction, where the playback instruction includes an identifier of a target television wall to be played back;
a synchronous sending module 602, configured to send a control instruction to a target output board connected to the target television wall according to an identifier of the target television wall to be displayed back, where the target output board has multiple output ports, each output port is connected to one display unit in the target television wall, and outputs one path of video information to the display unit, and the control instruction is used to instruct the target output board to send multiple paths of video information of each output port to the service board;
The encoding and decoding module 603 is configured to receive the multiple paths of video information sent by the target output board respectively; combining the multiple paths of video information into one path of echoed information;
an output module 604, configured to output the echoed information.
in the embodiment of the invention, after the service board acquires the playback instruction, the target television wall is determined according to the playback instruction, and the control instruction is sent to the target output board of the target television wall, so that the target output board sends the video information output to each display unit in the target television wall to the service board, and the service board combines multiple paths of video information into one path of playback information and then outputs the playback information, thereby realizing the playback of the television wall image in the target television wall. In the embodiment of the invention, the service board can obtain the echoed images of the target television wall from the plurality of television walls according to the echoed instructions, so that the television wall image echoing method provided by the embodiment of the invention can be applied to a distributed television wall system with a plurality of television walls, and the problem that the distributed television wall system cannot realize the echoing function in the prior art is solved.
Optionally, in the service board provided in the embodiment of the present invention, if there are a plurality of target output boards connected to the target television wall, the synchronous sending module 602 is specifically configured to:
And synchronously sending the control instruction to a plurality of target output boards connected with the target television wall.
Optionally, in the service board provided in the embodiment of the present invention, the encoding/decoding module 603 is specifically configured to:
Receiving the encoded multi-channel video code streams sent by the target output board respectively; respectively decoding the multiple paths of video code streams; splicing images formed by the decoded video code streams to form a playback image;
The output module 604 is specifically configured to: and outputting the echo image.
optionally, in the service board provided in the embodiment of the present invention, the service board further includes: a calculation module;
The computing module is specifically configured to determine, for each output port in the target output board, a relative position of a display unit connected to the output port in the target television wall, and use the relative position as a relative position corresponding to the output port; and sending the relative position corresponding to each output port and a preset image size to the target output board so that the target output board encodes the video information of each output port according to the relative position and the preset image size to form the multi-path encoded video code stream, wherein the preset image size is the size of an image formed by one path of video code stream.
Optionally, in the service board provided in the embodiment of the present invention, the service board further includes: a size calculation module;
The size calculation module is specifically configured to divide the resolution in the width direction and the resolution in the height direction in the preset resolution of the back display image by the number of the horizontal display units and the number of the vertical display units in the target television wall, respectively, to obtain the preset image size.
Optionally, in the service board provided in the embodiment of the present invention, the encoding/decoding module 603 is specifically configured to:
And splicing images formed by the video code streams corresponding to the output ports at corresponding positions according to the corresponding relative positions of the output ports to form the echo image.
Optionally, in the service board provided in the embodiment of the present invention, the synchronous sending module 602 is further configured to:
and sending a timestamp to the target output board, wherein the timestamp is used for enabling the multi-channel video code stream sent by the target output board to have a synchronous timestamp.
Optionally, in the service board provided in the embodiment of the present invention, the output module 604 is specifically configured to:
coding the echo image to form an echo code stream; and outputting the echo code stream.
Referring to fig. 7, fig. 7 is a structural diagram of an output board according to an embodiment of the present invention. The output board is connected with a television wall, the output board is provided with a plurality of output ports, each output port is connected with one display unit in the television wall and outputs one path of video information to the display unit, and the output board comprises:
an obtaining module 701, configured to obtain video information;
An output module 702, configured to output the video information to each display unit in the video wall through each output port respectively;
and the encoding and decoding module 703 is configured to send, if a control instruction sent by a service board is received, the multiple paths of video information output by each output port to the service board, where the service board is configured to obtain the video information output by the output board to the television wall.
Optionally, in the output board provided in the embodiment of the present invention, the encoding and decoding module 703 is specifically configured to:
Encoding the multi-path video information output by each output port to form a multi-path video code stream; and sending the multi-path video code stream to the service board.
Optionally, in the output board provided in the embodiment of the present invention, if the relative position and the preset image size corresponding to each port sent by the service board are received, the encoding and decoding module 703 is specifically configured to:
and coding the video information of each output port according to the relative position and the preset image size to form the multi-path video code stream.
optionally, in the output board provided in the embodiment of the present invention, if the timestamp sent by the service board is received, the encoding and decoding module 703 is specifically configured to:
And synchronously encoding the multi-path video information output by each output port to form the multi-path video code stream, and adding the synchronous time stamp into the multi-path video code stream.
Referring to fig. 8, fig. 8 is a structural diagram of a distributed tv wall system according to an embodiment of the present invention.
the distributed television wall system can comprise a service board, a plurality of output boards, a plurality of television walls and terminal equipment. The service board is used for realizing any one of the television wall image playback methods applied to the service board. Each of the plurality of output boards is used for realizing any one of the above television wall image reproduction methods applied to the output boards.
the service board is respectively connected with the plurality of output boards through a network. Which may include local area networks and the internet. Specifically, the service board and each output board may be connected to a switch, respectively, and the service board is connected to each output board through the switch.
The output boards are respectively connected with the television walls, each output board is provided with a plurality of output ports, and each output port is connected with one display unit in the television wall and outputs one path of video information to the display unit.
as shown in fig. 8, a plurality of output boards may be connected to one tv wall, and the output board 1-1 in fig. 8 represents a first output board connected to the tv wall 1, and the output board 1-N represents an nth output board connected to the tv wall 1. Similarly, output boards 2-1, etc. all represent output boards connected to different television walls.
The terminal equipment is connected with the service board and used for acquiring the echoing information output by the service board.
The terminal equipment can be connected with the service board by a network through the switch. Therefore, the echoing instruction is sent to the service board through the network, and the echoing code stream sent by the service board is received.
The terminal equipment can acquire the echo code stream of the television wall image displayed in the appointed target television wall through the service board, and can directly see the real-time echo image after decoding. Therefore, the redisplay function is realized in the distributed television wall system, and a user can check the television wall images displayed in each television wall more conveniently through the terminal equipment.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
all the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (17)

1. The television wall image redisplay method is applied to a service board, the service board is connected with a plurality of output boards, the output boards are respectively connected with a plurality of television walls, the service board is used for acquiring video information output by the output boards to the television walls, and the television wall image redisplay method comprises the following steps:
acquiring a playback instruction, wherein the playback instruction comprises an identifier of a target television wall to be played back;
According to the identification of the target television wall to be displayed back, sending a control instruction to a target output board connected with the target television wall, wherein the target output board is provided with a plurality of output ports, each output port is connected with one display unit in the target television wall and outputs one path of video information to the display unit, and the control instruction is used for instructing the target output board to send the multiple paths of video information of each output port to the service board;
respectively receiving the multi-channel video information sent by the target output board;
Combining the multiple paths of video information into one path of echoed information;
And outputting the echoed information.
2. The method according to claim 1, wherein if there are a plurality of target output boards connected to the target video wall, the sending a control command to the target output board connected to the target video wall includes:
and synchronously sending the control instruction to a plurality of target output boards connected with the target television wall.
3. The method according to claim 1 or 2, wherein said receiving the multiple channels of video information sent by the target output board respectively comprises:
Receiving the encoded multi-channel video code streams sent by the target output board respectively;
The combining the multiple paths of video information into one path of echoed information comprises:
respectively decoding the multiple paths of video code streams;
Splicing images formed by the decoded video code streams to form a playback image;
The outputting the echoed information comprises:
And outputting the echo image.
4. The method of claim 3, wherein prior to said sending control instructions to a target output board to which said target video wall is connected, said method further comprises:
for each output port in the target output board, determining the relative position of a display unit connected with the output port in the target television wall, and taking the relative position as the corresponding relative position of the output port;
And sending the relative position corresponding to each output port and a preset image size to the target output board so that the target output board encodes the video information of each output port according to the relative position and the preset image size to form the multi-path encoded video code stream, wherein the preset image size is the size of an image formed by decoding one path of the video code stream.
5. The method of claim 4, further comprising:
And dividing the resolution in the width direction and the resolution in the height direction in the preset echoed image resolution by the number of the horizontal display units and the number of the vertical display units in the target television wall respectively to obtain the preset image size.
6. The method according to claim 4, wherein the splicing the images formed by the decoded video code streams to form a playback image comprises:
And splicing images formed by decoding the video code streams corresponding to the output ports at corresponding positions according to the corresponding relative positions of the output ports to form the echo image.
7. The method of claim 3, wherein prior to said sending control instructions to a target output board to which said target video wall is connected, said method further comprises:
and sending a timestamp to the target output board, wherein the timestamp is used for enabling the multi-channel video code stream sent by the target output board to have a synchronous timestamp.
8. the method of claim 3, wherein outputting the echo image comprises:
coding the echo image to form an echo code stream;
And outputting the echo code stream.
9. A service board is characterized in that the service board is connected with a plurality of output boards, the output boards are respectively connected with a plurality of television walls, the service board is used for acquiring video information output by the output boards to the television walls, and the service board comprises:
The acquisition module is used for acquiring a playback instruction, and the playback instruction comprises an identifier of a target television wall to be played back;
the synchronous sending module is used for sending a control instruction to a target output board connected with the target television wall according to the identification of the target television wall to be displayed back, the target output board is provided with a plurality of output ports, each output port is connected with one display unit in the target television wall and outputs one path of video information to the display unit, and the control instruction is used for indicating the target output board to send the multiple paths of video information of each output port to the service board;
The encoding and decoding module is used for respectively receiving the multi-channel video information sent by the target output board; combining the multiple paths of video information into one path of echoed information;
and the output module is used for outputting the echoed information.
10. The service board according to claim 9, wherein if there are a plurality of target output boards connected to the target video wall, the synchronous transmission module is specifically configured to:
And synchronously sending the control instruction to a plurality of target output boards connected with the target television wall.
11. the service board according to claim 9 or 10, wherein the codec module is specifically configured to:
Receiving the encoded multi-channel video code streams sent by the target output board respectively; respectively decoding the multiple paths of video code streams; splicing images formed by the decoded video code streams to form a playback image;
the output module is specifically configured to: and outputting the echo image.
12. the service board of claim 11, further comprising: a calculation module;
the computing module is specifically configured to determine, for each output port in the target output board, a relative position of a display unit connected to the output port in the target television wall, and use the relative position as a relative position corresponding to the output port; and sending the relative position corresponding to each output port and a preset image size to the target output board so that the target output board encodes the video information of each output port according to the relative position and the preset image size to form the multi-path encoded video code stream, wherein the preset image size is the size of an image formed by one path of video code stream.
13. the service board of claim 12, further comprising: a size calculation module;
the size calculation module is specifically configured to divide the resolution in the width direction and the resolution in the height direction in the preset resolution of the back display image by the number of the horizontal display units and the number of the vertical display units in the target television wall, respectively, to obtain the preset image size.
14. The service board according to claim 12, wherein the codec module is specifically configured to:
And splicing images formed by the video code streams corresponding to the output ports at corresponding positions according to the corresponding relative positions of the output ports to form the echo image.
15. The service board of claim 11, wherein the synchronization sending module is further configured to:
And sending a timestamp to the target output board, wherein the timestamp is used for enabling the multi-channel video code stream sent by the target output board to have a synchronous timestamp.
16. The service board of claim 11, wherein the output module is specifically configured to:
coding the echo image to form an echo code stream; and outputting the echo code stream.
17. A distributed television wall system is characterized by comprising a service board, a plurality of output boards, a plurality of television walls and terminal equipment;
The service board is used for implementing the method of any one of claims 1 to 8;
The service board is respectively connected with the plurality of output boards through a network;
The output boards are respectively connected with the television walls, each output board is provided with a plurality of output ports, and each output port is connected with one display unit in the television wall and outputs one path of video information to the display unit;
The terminal equipment is connected with the service board and used for acquiring the echoing information output by the service board.
CN201810578987.3A 2018-06-07 2018-06-07 Television wall image redisplay method, service board and distributed television wall system Active CN110581962B (en)

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