CN107920268A - A kind of display methods, display device and display system - Google Patents
A kind of display methods, display device and display system Download PDFInfo
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- CN107920268A CN107920268A CN201610882118.0A CN201610882118A CN107920268A CN 107920268 A CN107920268 A CN 107920268A CN 201610882118 A CN201610882118 A CN 201610882118A CN 107920268 A CN107920268 A CN 107920268A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000011664 signaling Effects 0.000 claims description 20
- 230000008054 signal transmission Effects 0.000 claims description 11
- 238000000605 extraction Methods 0.000 claims description 7
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- 239000007983 Tris buffer Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 description 7
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- 238000010586 diagram Methods 0.000 description 6
- 239000013307 optical fiber Substances 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
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Classifications
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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
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
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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
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
- G06F3/1446—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display display composed of modules, e.g. video walls
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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
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
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- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The embodiment of the present invention provides a kind of display methods, display device and display system, and applied to TV wall display system, display methods includes：Each babinet receives target data bag that signal sending card is sent by data port, corresponding with itself, and first kind signal is sent to the data port of signal sending card；Each babinet is when receiving the second class signal that signal sending card is sent by data port, and after being spaced the preset time corresponding to itself, display receives subgraph corresponding to target data bag, and preset time is：Transmit the delay time of the second class signal between residing rank and the other babinet of adjacent level in level header body based on corresponding babinet and set.Using the embodiment of the present invention, each babinet is after the second class signal is received, subgraph corresponding to received target data bag is not directly displayed, but just shown after being spaced the preset time corresponding to itself, the synchronism that each babinet display receives subgraph corresponding to target data bag can be improved.
Description
Technical Field
The invention relates to the technical field of display screen display, in particular to a display method, display equipment and a display system.
Background
As shown in fig. 1, the display system of a video wall is composed of a display screen and a signal transmission card, wherein "1" represents a data port, and "2" represents a driving module. Because the size of the display screen is larger, the display screen can be formed by splicing a plurality of display screen box units (called as 'boxes' for short) which have smaller screen sizes and are composed of light emitting diodes, wherein each box is provided with a driving module supporting a cascading mode, the driving modules of the boxes can have the same structure, size and interface, and a group of cascading driving modules can be controlled by a common interface. Generally, the signaling card may be equipped with a plurality of data ports, and transmit a target data packet and a display signal to each box through the equipped data ports and by using a transmission method of a network cable or an optical fiber, where the target data packet is image data of a sub-image required to be displayed by the corresponding box, and the display signal is a signal for instructing the box to display the sub-image corresponding to the received target data packet.
In the related art, in consideration of the utilization rate of the data port in the signal transmitting card, the boxes constituting the display screen are generally divided into a plurality of box groups, and the boxes in each box group are connected in a cascade manner, and each data port controls one group of the box groups connected in cascade. The data processing principle of the cascade mode is as follows: and the object at the top level receives the data required by all the level objects in the group, forwards the rest of data except the self required data to the object at the next level, and so on until the object at the last level receives the data required by the object at the last level.
Under the condition that the boxes are connected in a cascade connection mode, when the screen of the television wall display system is very large, the number of the cascaded boxes in each box group is correspondingly increased, and due to the characteristic of primary-level and primary-level forwarding in the cascade connection mode, when a trigger signal for indicating the boxes to display sub-images corresponding to received target data packets is forwarded, the following problems can occur: the delay time in the signal forwarding process easily causes the asynchrony of sub-images corresponding to the received target data packet displayed by each box body, so that the problems of tearing and dislocation of the picture occur, and the visual experience of a user is reduced.
Disclosure of Invention
The embodiment of the invention aims to provide a display method, a display device and a display system, which are used for improving the synchronism of sub-images corresponding to received target data packets displayed by each box body and improving the visual experience of a user.
In order to achieve the above object, an embodiment of the present invention discloses a display method applied to a video wall display system, where the video wall display system includes a display screen and a signal transmission card, the display screen is composed of multiple boxes connected in a cascade manner, and the signal transmission card is equipped with a data port, and the method includes:
each box body receives a target data packet which is sent by the signal sending card through a data port and corresponds to the box body;
each box body sends a first type of signal to a data port of the signal sending card, so that the signal sending card sends a second type of signal to each box body after receiving all the first type of signals sent by all the box bodies; the first type of signal is a signal for indicating that the box body receives a target data packet, and the second type of signal is a signal for indicating that the box body displays a sub-image corresponding to the received target data packet;
when receiving a second type of signal sent by the signal sending card through a data port, each box body displays sub-images corresponding to received target data packets after a preset time corresponding to the box body, wherein the preset time is as follows: and the delay time is set based on the delay time for transmitting the second type of signals between the level of the corresponding box in the cascade box and the adjacent level of the corresponding box.
Optionally, the preset time corresponding to each box is calculated by the following formula:
Tr＝T0*(N-i)；
wherein, TrIs the preset time T corresponding to the box body r0The delay time required for transmitting the second type of signals between the boxes of adjacent levels, N is the number of boxes corresponding to the same data port, and i is the level of the box r in the cascaded box.
Optionally, each box receiving a target data packet, which is sent by the signal sending card through the data port and corresponds to the box itself, includes:
each box body receives a target data packet group sent by an object of the previous level; the top-level box body corresponds to the upper-level object as the signal sending card, the other top-level boxes correspond to the upper-level objects as the upper-level boxes corresponding to the other top-level boxes, and the target data packet group sent by the signal sending card comprises: target data packets corresponding to boxes of all levels in the group;
each box body extracts and stores a target data packet corresponding to the box body from the received target data packet group;
each box body forms a new target data packet group by the target data packets except the target data packet corresponding to the box body in the received target data packet group;
and the box body of the previous level issues the formed new target data packet group to the box body of the next level.
Optionally, each box extracts and stores a target data packet corresponding to the box from the received target data packet group, including:
and based on the box body identification of the user, extracting and storing the target data packet corresponding to the user from the received target data packet group.
Optionally, the signal transmitting card includes a plurality of data ports, the plurality of boxes in the display screen are divided into a plurality of box groups according to a column direction, the boxes in the same row are in the same level, the plurality of boxes in the same column are connected in cascade according to the column direction to serve as one box group, the number of the box groups is the same as the number of the data ports, the box groups correspond to the data ports one to one, each box in each box group receives a data packet simultaneously sent by the signal transmitting card through the corresponding data port, each box in each box group sends a first type of signal to the signal transmitting card through the corresponding data port, so that the signal transmitting card sends a second type of signal to each box in each box group after receiving each first type of signal sent by each box in all box groups.
In order to achieve the above object, an embodiment of the present invention discloses a display device, which is applied to a video wall display system, wherein the video wall display system includes a display device and a signal transmitting card, the display device includes a display screen, the display screen is composed of a plurality of box bodies connected in a cascade manner, each box body includes a data packet receiving module, a signal transmitting module and a display module, and the signal transmitting card is equipped with a data port; wherein,
the data packet receiving module is used for receiving a target data packet which is sent by the signal sending card through a data port and corresponds to the box body;
the signal sending module is used for sending first-class signals to a data port of the signal sending card so that the signal sending card sends second-class signals to each box after receiving all the first-class signals sent by all the boxes; the first type of signal is a signal for indicating that the box body receives a target data packet, and the second type of signal is a signal for indicating that the box body displays a sub-image corresponding to the received target data packet;
the display module is configured to display the sub-image corresponding to the received target data packet after a preset time corresponding to the display module is set, when the second type of signal sent by the signal sending card through the data port is received, where the preset time is: and the delay time is set based on the delay time for transmitting the second type of signals between the level of the corresponding box in the cascade box and the adjacent level of the corresponding box.
Optionally, the preset time corresponding to each box is calculated by the following formula:
Tr＝T0*(N-i)；
wherein Tr is a preset time corresponding to the box body r, T0Required for conveying signals of the second type between adjacent stages of cabinetsAnd time delay, wherein N is the number of boxes corresponding to the same data port, and i is the level of the box r in the cascade box.
Optionally, the data packet receiving module includes:
the data packet group receiving submodule is used for receiving a target data packet group sent by an object of the previous level; the top-level box body corresponds to the upper-level object as the signal sending card, the other top-level boxes correspond to the upper-level objects as the upper-level boxes corresponding to the other top-level boxes, and the target data packet group sent by the signal sending card comprises: target data packets corresponding to boxes of all levels in the group;
the data packet extraction submodule is used for extracting and storing the corresponding target data packet from the received target data packet group;
the data packet group forming submodule is used for forming the target data packets except the target data packet corresponding to the data packet group in the received target data packet group into a new target data packet group;
and the data packet group sending submodule is used for sending the formed new target data packet group to the next-level box body.
Optionally, the data packet extraction sub-module is specifically configured to:
and based on the box body identification of the user, extracting and storing the target data packet corresponding to the user from the received target data packet group.
Optionally, the signal transmitting card includes a plurality of data ports, the plurality of boxes in the display screen are divided into a plurality of box groups according to a column direction, the boxes in the same row are in the same level, the plurality of boxes in the same column are connected in cascade according to the column direction to serve as one box group, the number of the box groups is the same as the number of the data ports, the box groups correspond to the data ports one to one, each box in each box group receives a data packet simultaneously sent by the signal transmitting card through the corresponding data port, each box in each box group sends a first type of signal to the signal transmitting card through the corresponding data port, so that the signal transmitting card sends a second type of signal to each box in each box group after receiving each first type of signal sent by each box in all box groups.
In order to achieve the above object, the embodiment of the present invention discloses a video wall display system, which comprises a signal transmitting card and a display device, wherein the display device comprises a display screen, the display screen is composed of a plurality of box bodies connected in a cascade manner, each box body comprises a data packet receiving module, a signal transmitting module and a display module, and the signal transmitting card is provided with a data port; wherein,
the signal transmitting card is used for transmitting a target data packet to each box body connected in a cascade mode through a data port, receiving first-class signals transmitted to the data port of the signal transmitting card by each box body, and transmitting second-class signals to each box body after receiving all the first-class signals transmitted by all the box bodies; the first type of signal is a signal for indicating that the box body receives a target data packet, and the second type of signal is a signal for indicating that the box body displays a sub-image corresponding to the received target data packet;
each box body in the display screen is used for receiving a target data packet which is sent by the signal sending card through a data port and corresponds to the box body; sending first-class signals to a data port of the signal sending card, so that the signal sending card sends second-class signals to each box body after receiving all the first-class signals sent by all the box bodies; when a second type of signal sent by the signal sending card through a data port is received, displaying a subimage corresponding to the received target data packet after a preset time corresponding to the signal sending card, wherein the preset time is as follows: and the delay time is set based on the delay time for transmitting the second type of signals between the level of the corresponding box in the cascade box and the adjacent level of the corresponding box.
Optionally, the signal transmitting card includes a plurality of data ports, the plurality of boxes in the display screen are divided into a plurality of box groups according to a column direction, the boxes in the same row are in the same level, the plurality of boxes in the same column are connected in cascade according to the column direction to serve as one box group, the number of the box groups is the same as the number of the data ports, the box groups correspond to the data ports one to one, each box in each box group receives a data packet simultaneously sent by the signal transmitting card through the corresponding data port, each box in each box group sends a first type of signal to the signal transmitting card through the corresponding data port, so that the signal transmitting card sends a second type of signal to each box in each box group after receiving each first type of signal sent by each box in all box groups.
When the scheme provided by the embodiment of the invention is applied for display, each box body does not directly display the sub-image corresponding to the received target data packet after receiving the second type of signal, but is displayed after a preset time corresponding to the corresponding box per se is set according to the delay time for transmitting the second type of signals between the box at the level of the corresponding box in the cascade box and the box at the adjacent level, in the process of displaying, the condition that boxes at different levels are not synchronous when the second type of signal transmission is carried out is fully considered, in view of this, each box displays the sub-image corresponding to the received target packet after a predetermined time interval corresponding to itself, therefore, the synchronism of the subimages corresponding to the received target data packet displayed by each box body is improved, and the visual experience of a user is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only 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 functional schematic diagram of a video wall display system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a hardware architecture between boxes of a display screen according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a display method according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a second type of signal transmitted by a signal transmitting card according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a box constituting a display screen according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a video wall display 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.
In order to improve the synchronism of sub-images corresponding to target data packets displayed by each box and further improve the visual experience of a user, the embodiment of the invention provides a display method, equipment and a system.
A display method provided in an embodiment of the present invention is first described below.
It should be noted that the display method provided by the embodiment of the present invention is applied to a video wall display system, where the video wall display system includes a display screen and a signal transmitting card, the display screen is composed of a plurality of boxes connected in a cascade manner, and the signal transmitting card is equipped with a plurality of data ports. It is emphasized that the cabinet is a display screen cabinet unit.
Because the display screen of the video wall display system has a relatively large size, such as a display screen with a resolution of 1920 × 1080, in practical applications, in order to meet different display requirements, the display screen of the video wall display system is often formed by splicing a plurality of boxes. It should be noted that, the embodiment of the present invention does not need to limit the number of boxes constituting the video wall display system; in addition, the embodiment of the present invention does not need to limit the size of the box resolution of each box, for example, a box with a resolution of 288 × 288 may be used, and a box with a resolution of 192 × 192 may also be used, and those skilled in the art need to select a box with a suitable resolution according to the specific situation in the practical application.
As an embodiment of the present invention, the above-mentioned signal transmission card may include a plurality of data ports, the plurality of boxes in the display screen can be divided into a plurality of box groups according to the column direction, the boxes in the same row are in the same level, the plurality of boxes in the same column are connected in cascade according to the column direction to form a box group, the number of the box groups is the same as the number of the data ports, the box groups correspond to the data ports one by one, each box in each box group respectively receives data packets which are simultaneously sent by the signal sending card through the corresponding data ports, each box in each box group sends a first type of signal to the signal sending card through the corresponding data port of the group, after receiving the first type signals sent by the boxes in all the box groups, the signal sending card sends the second type signals to the boxes in each box group.
Specifically, the above mentioned box groups correspond to the data ports one to one, and it can be understood that: the number of box groups divided by the display screen is the same as the number of data ports provided by the signaling card, and each data port uniquely corresponds to one box group, for example, the display screen is divided into four box groups of 1, 2, 3 and 4, then the signaling card correspondingly needs to be provided with four data ports A, B, C and D, and box group 1 uniquely corresponds to data port a, box group 2 uniquely corresponds to data port B, box group 3 uniquely corresponds to data port C, and box group 4 uniquely corresponds to data port D.
The so-called cascade data processing principle is as follows: and the object at the top level receives the data required by all the level objects in the group, forwards the rest of data except the self required data to the object at the next level, and so on until the object at the last level receives the data required by the object at the last level.
For example, as shown in fig. 2, the box forming the display screen in the video wall display system is divided into four box groups 1, 2, 3 and 4, the signaling card includes four data ports A, B, C and D, and the four data ports correspond to the four box groups respectively; wherein each case group comprises 3 cases connected in a cascade manner in the same column, for example, case group 1 comprises a11、a12And a13Three boxes, the box group 2 comprises b11、b12And b13The box body group 3 comprises c11、c12And c13The box body group 4 comprises d11、d12And d13. When the required data is image data, the image data required for all the level objects in the box group 1 is I11、I12、I13The image data required for all the level objects in the box group 2 is I21、I22、I23The image data required for all the level objects in the box group 3 is I31、I32、I33The image data required for all the level objects in the box group 4 is I41、I42、I43。
Thus, when the signal transmission card simultaneously transmits image data required in each of the sets to the corresponding sets of boxes 1, 2, 3 and 4 through the data ports A, B, C and D, the box a at the top level (i.e., level 1) is11、b11、c11And d11Simultaneously receiving image data which is sent by a signal sending card through a data port and is required by 3 levels of boxes in the group, specifically, a box body a11Receiving image data I sent by signal sending card through data port A11、I12、I13Case body b11Receiving image data I sent by signal sending card through data port B21、I22、I23Case c11Receiving image data I sent by signal sending card through data port C31、I32、I33Case d11Receiving image data I sent by signal sending card through data port D41、I42、I43(ii) a Then, the tank a at the top level11、b11、c11And d11Meanwhile, image data except self required data is forwarded to the corresponding 2 nd level box body a12、b12、c12And d12Likewise, the tank a at level 212、b12、c12And d12Receiving image data sent by the 1 st-level corresponding box, specifically, the box a12Receiving box body a11Transmitted image data I12、I13Case body b12Receiving box body b11Transmitted image data I22、I23Case c12Receiving box c11Transmitted image data I32、I33Case d12Receiving box body d11Transmitted image data I42、I43(ii) a Next, the case a at level 212、b12、c12And d12Meanwhile, forwarding image data except self required data to a 3 rd level box body; case a at level 313、b13、c13And d13Receiving level 2Image data transmitted corresponding to the box, specifically, box a13Receiving box body a12Transmitted image data I13Case body b13Receiving box body b12Transmitted image data I23Case c13Receiving box c12Transmitted image data I33Case d13Receiving box body d12Transmitted image data I43Since the 3 rd level box is the box at the last level, therefore, the 3 rd level box a13、b13、c13And d13And when the image data required by the box body is received at the same time, the completion of the reception of the image data required in each box body group is indicated.
The above mentioned image data may be a video frame image acquired by a video acquisition device in real time, or an image encoded according to a streaming data encoding format.
Specifically, the display method shown in fig. 3 may include the following steps:
s101: each box body receives a target data packet which is sent by the signal sending card through the data port and corresponds to the box body.
It should be noted that, the target data packet sent by the signaling card may be real-time video data generated by a video capture device at the front end, or may be offline video data pre-stored in a data storage server, and the embodiment of the present invention does not need to limit the source of the target data packet sent by the signaling card, and those skilled in the art need to perform reasonable setting according to specific situations in practical applications.
It should be noted that each box in one box group is usually controlled by the same data port, and for different box groups, data is often sent to different box groups through different data ports, and data is processed between different box groups in a parallel data processing manner, that is, data is sent to corresponding box groups by multiple different data ports of the signal sending card at the same time.
In one implementation, the target data packet corresponding to the box itself, which is sent by the signaling card through the data port, may be received as follows:
(1) each box body receives a target data packet group sent by an object of the upper level.
The top box corresponds to the upper level object as the signal transmitting card, and the other boxes except the top box correspond to the upper level object as the self upper level box.
For example, including a for the case group 111、a12And a13In the case of three cases, the top case (i.e., level 1) a11The corresponding upper level object is a signal sending card, and the 2 nd level box body a12The corresponding object of the previous level is the box body a of the level 111And the 3 rd level box a13The corresponding object of the previous level is the box body a of the level 112。
Wherein, the target data packet group sent by the signal sending card comprises: and target data packets corresponding to boxes of all levels in the group.
For example, including a for the case group 111、a12And a13In the case of three cases, case a11The corresponding target data packet is I11Case a12The corresponding target data packet is I12Case a13The corresponding target data packet is I13. It can be seen that the signaling card needs to include the target data packet I in the target data packet group sent by the box group 111、I12、I13。
(2) And each box body extracts and stores the target data packet corresponding to the box body from the received target data packet group.
In one implementation, the target data packet corresponding to the target data packet may be extracted and stored from the received target data packet group based on the box identifier of the target data packet.
On one hand, the boxes constituting the display screen in the video wall display system may be numbered in advance, so that each box can be uniquely represented by a box identifier, for example, when the display screen of the video wall display system is constituted by 12 boxes of 3 rows and 4 columns, the boxes may be numbered, and the box identifiers shown below are obtained: l is11、L12、L13；L21、L22、L23；L31、L32、L33；L41、L42、L43。
On the other hand, for an image I which needs to be displayed on a display screen of the television wall display system, the image I also needs to be divided into one image block according to the size of the resolution of the box body; furthermore, the data blocks to be displayed on a certain box and the box identifier corresponding to the box can be encapsulated into a target data packet according to a certain data packet encapsulation rule.
Therefore, for each box in one box group, the box identification of each box can be matched with the box identification carried in each target data packet in the target data packet group, so that the matched target data packet is extracted, and the extracted target data packet corresponding to the box is stored.
(3) Each box body forms a new target data packet group by the target data packets except the target data packet corresponding to the box body in the received target data packet group.
For example, for the case a11、a12、a13The case group 1 is formed of cases a at the top stage11Receiving a target data packet group (I) transmitted by a signal transmitting card through a data port11、I12、I13) When the case body a11According to the box body identification L11From the target group of packetsExtracting a target data packet I corresponding to the target data packet I11Then, the received target data packet group needs to be divided by I11The other destination packets forming a new destination packet group (I)12、I13)。
(4) And the box body of the previous level issues the formed new target data packet group to the box body of the next level.
It can be seen from the above that, the target data packets in the target data packet group received by the top stage are forwarded layer by layer in the cascade manner, and the target data packets of the boxes in the box group are received when the box at the last stage receives the target data packets corresponding to the box.
S102: each box body sends a first type of signal to a data port of the signal sending card, so that the signal sending card sends a second type of signal to each box body after receiving all the first type of signals sent by all the box bodies.
The first type of signal is a signal for indicating that the box body has received the target data packet, and the second type of signal is a signal for indicating that the box body displays a sub-image corresponding to the received target data packet.
It should be noted that, after each box in each box group receives its own corresponding target data packet, it needs to send a first type of signal to the data port of the signaling card, so that the signaling card can confirm that the corresponding box has received its own corresponding target data packet after receiving the first type of signal sent by each box.
As shown in fig. 4, taking a video source with a frame rate of 60Hz as an example, the video source generates one video frame image every 1/60 seconds, for the 1 st frame video frame image, after the signaling card receives the first type signal sent by all boxes to indicate that each box itself has received the destination data packet corresponding to the 1 st frame video frame image, the signaling card sends the second type signal through the data port at time point 1/60 seconds, similarly, after the signaling card sends the second type signal for the 1 st frame video frame image, the signaling card waits to receive the first type signal sent by each box to indicate that each box itself has received the destination data packet corresponding to the 2 nd frame video frame image, after the signaling card receives the first type signal sent by all boxes to indicate that each box itself has received the destination data packet corresponding to the 2 nd frame video frame image, the signaling card again sends the second type of signal through the data port at time point 2/60 seconds.
It should be emphasized that, when each box body sends the first type signal to the data port of the signal sending card, the corresponding first type signal is not directly sent to the data port of the signal sending card, but the first type signal is transmitted to the signal sending card by the box bodies connected in a cascade manner in a layer-by-layer forwarding manner. Still by the box body a11、a12、a13The case set 1 is described as an example, and when the case a is13Receiving a corresponding target data packet I13At first, the box body a13It is necessary to send the first type signal to the box a of the previous level12And is composed of a box body a12The first kind of signal is forwarded to the box a at the previous level11Finally, from the box a11The first type of signal is forwarded to a data port of a signal transmitting card.
It should be emphasized that, in order to ensure that the boxes can synchronously display the sub-images corresponding to the received target data packets, the signal sending card sends the second type of signal to each box only after receiving the first type of signals sent by all boxes.
S103: and when each box body receives a second type of signal sent by the signal sending card through the data port, displaying the subimage corresponding to the received target data packet after the preset time corresponding to the box body is separated.
Wherein the preset time is as follows: and the delay time is set based on the delay time of the corresponding box for transmitting the second type signals between the box of the level where the corresponding box is located in the cascade box and the box of the adjacent level.
It should be noted that the second type of signals sent by the signal sending card are also sent to each box in each box group by boxes connected in a cascade manner in a layer-by-layer forwarding manner. It will be appreciated that the forwarding process for the second type of signal is time-consuming, i.e. has a delay time. Therefore, when the display screen in the video wall display system is large, the number of the cascaded boxes in each box group is large, and thus, the delay time in the signal forwarding process easily causes that the boxes display the sub-images corresponding to the received target data packet asynchronously, thereby causing the problems of image tearing and dislocation.
Therefore, in order to solve the problem that each box body displays the sub-images corresponding to the received target data packets asynchronously, when each box body receives the second type of signals sent by the signal sending card through the data port, the sub-images corresponding to the received target data packets are not directly displayed, but are displayed after a preset time corresponding to the box body is set, and therefore, the sub-images corresponding to the received target data packets can be displayed synchronously by each box body as far as possible.
In one implementation, the preset time corresponding to each box can be calculated by the following formula:
Tr＝T0*(N-i)；
wherein, TrIs the preset time T corresponding to the box body r0The delay time required for transmitting the second type of signals between the boxes of adjacent levels, N is the number of boxes corresponding to the same data port, and i is the level of the box r in the cascaded box.
For example, for the case a11、a12、a13For the formed box group 1, the delay time T required for transmitting the second type signal between the boxes of adjacent levels is assumed0Is 5ms, then, a11The corresponding preset time is 5 x (3-1) ═ 10ms, a12The corresponding preset time is 5 x (3-2) ═ 5ms, a13The corresponding preset time is 5 × 3-3 ═ 0 ms.
It should be emphasized that the above calculation formula of the preset time corresponding to each box is only used as an example, and should not be construed as limiting the embodiment of the present invention.
When the scheme provided by the embodiment of the invention is applied to display, after the boxes receive the second type of signals, the subimages corresponding to the received target data packets are not directly displayed, but are displayed after the preset time corresponding to the boxes per se is set based on the delay time for transmitting the second type of signals between the box at the level of the corresponding box in the cascade box and the box at the adjacent level, so that the situation that the boxes at different levels are not synchronous in the transmission of the second type of signals is fully considered in the display process, and in view of the fact that the subimages corresponding to the received target data packets are displayed after the boxes are spaced by the preset time corresponding to the boxes per se, the subimages corresponding to the received target data packets can be synchronously displayed by the boxes, and the visual experience of a user is improved.
Corresponding to the method embodiment, the embodiment of the invention also provides a display device.
A display device according to an embodiment of the present invention will be described below.
The display equipment provided by the embodiment of the invention is applied to a television wall display system, the television wall display system comprises display equipment and a signal transmitting card, the display equipment comprises a display screen, the display screen consists of a plurality of box bodies connected in a cascading mode, each box body comprises a data packet receiving module, a signal transmitting module and a display module, and the signal transmitting card is provided with a data port.
Fig. 5 is a schematic structural diagram of a box constituting a display screen according to an embodiment of the present invention.
The data packet receiving module 210 is configured to receive a target data packet that is sent by the signal sending card through the data port and corresponds to the box itself.
The signal sending module 220 is configured to send a first type of signal to a data port of the signal sending card, so that the signal sending card sends a second type of signal to each box after receiving each first type of signal sent by all boxes.
The first type of signal is a signal for indicating that the box body has received the target data packet, and the second type of signal is a signal for indicating that the box body displays a sub-image corresponding to the received target data packet.
The display module 230 is configured to display the sub-image corresponding to the received target data packet after a preset time corresponding to the display module per se is set when the second type of signal sent by the signal sending card through the data port is received.
Wherein the preset time is as follows: and the delay time is set based on the delay time of the corresponding box for transmitting the second type signals between the box of the level where the corresponding box is located in the cascade box and the box of the adjacent level.
When the scheme provided by the embodiment of the invention is applied to display, after the boxes receive the second type of signals, the subimages corresponding to the received target data packets are not directly displayed, but are displayed after the preset time corresponding to the boxes per se is set based on the delay time for transmitting the second type of signals between the box at the level of the corresponding box in the cascade box and the box at the adjacent level, so that the situation that the boxes at different levels are not synchronous in the transmission of the second type of signals is fully considered in the display process, and in view of the fact that the subimages corresponding to the received target data packets are displayed after the boxes are spaced by the preset time corresponding to the boxes per se, the subimages corresponding to the received target data packets can be synchronously displayed by the boxes, and the visual experience of a user is improved.
As an embodiment of the present invention, the above-mentioned signal transmission card may include a plurality of data ports, the plurality of boxes in the display screen can be divided into a plurality of box groups according to the column direction, the boxes in the same row are in the same level, the plurality of boxes in the same column are connected in cascade according to the column direction to form a box group, the number of the box groups is the same as the number of the data ports, the box groups correspond to the data ports one by one, each box in each box group respectively receives data packets which are simultaneously sent by the signal sending card through the corresponding data ports, each box in each box group sends a first type of signal to the signal sending card through the corresponding data port of the group, after receiving the first type signals sent by the boxes in all the box groups, the signal sending card sends the second type signals to the boxes in each box group.
In addition, the video wall display system may further include, in addition to the display device and the signal transmission card: the device comprises a transmission module and a scanning control module. The transmission module can be connected with the display device by using a network cable or an optical fiber, so that the signal sending card can transmit data and/or signals in a network cable or optical fiber transmission mode; the scanning control module is used for receiving data streams transmitted on a network cable or an optical fiber, and driving the driving module in each box body to display after proper processing and conversion.
In one implementation, the preset time corresponding to each box can be calculated by the following formula:
Tr＝T0*(N-i)；
wherein Tr is a preset time corresponding to the box body r, T0The delay time required for transmitting the second type of signals between the boxes of adjacent levels, N is the number of boxes corresponding to the same data port, and i is the level of the box r in the cascaded box.
In an embodiment of the present invention, the packet receiving module 210 may include: the data packet group receiving submodule, the data packet extracting submodule, the data packet group forming submodule and the data packet group sending submodule.
Specifically, the packet group receiving sub-module is configured to receive a target packet group sent by an object of a previous level.
The top box corresponds to the upper level object as the signal transmitting card, and the other boxes except the top box correspond to the upper level object as the self upper level box.
Wherein, the target data packet group sent by the signal sending card comprises: and target data packets corresponding to boxes of all levels in the group.
And the data packet extraction submodule is used for extracting and storing the target data packet corresponding to the data packet extraction submodule from the received target data packet group.
And the data packet group forming submodule is used for forming the target data packets except the target data packet corresponding to the data packet group in the received target data packet group into a new target data packet group.
And the data packet group sending submodule is used for sending the formed new target data packet group to the next-level box body.
In one implementation, the packet extraction sub-module is specifically configured to:
and based on the box body identification of the user, extracting and storing the target data packet corresponding to the user from the received target data packet group.
Corresponding to the method embodiment, the embodiment of the invention also provides a television wall display system.
A television wall display system according to an embodiment of the present invention is described below.
As shown in fig. 6, a video wall display system provided for an embodiment of the present invention includes a display device and a signal transmitting card 310, where the display device includes a display screen, the display screen is composed of a plurality of boxes 320 connected in a cascade manner, each box includes a data packet receiving module, a signal transmitting module and a display module, and the signal transmitting card is equipped with a data port.
The signal transmitting card 310 is configured to transmit a target data packet to each of the boxes connected in a cascade connection manner through a data port, receive a first type of signal transmitted by each box to the data port of the signal transmitting card 310, and transmit a second type of signal to each box after receiving each first type of signal transmitted by all the boxes.
The first type of signal is a signal for indicating that the box body has received the target data packet, and the second type of signal is a signal for indicating that the box body displays a sub-image corresponding to the received target data packet.
Each box 320 in the display screen is used for receiving a target data packet which is sent by the signal sending card 310 through the data port and corresponds to the box; sending a first type of signal to a data port of the signal sending card 310, so that the signal sending card 310 sends a second type of signal to each box body simultaneously after receiving each first type of signal sent by all the box bodies; when a second type of signal sent by the signal sending card 310 through the data port is received, the subimage corresponding to the received target data packet is displayed after a preset time corresponding to the subimage.
Wherein the preset time is as follows: and the delay time is set based on the delay time of the corresponding box for transmitting the second type signals between the box of the level where the corresponding box is located in the cascade box and the box of the adjacent level.
When the scheme provided by the embodiment of the invention is applied to display, after the boxes receive the second type of signals, the subimages corresponding to the received target data packets are not directly displayed, but are displayed after the preset time corresponding to the boxes per se is set based on the delay time for transmitting the second type of signals between the box at the level of the corresponding box in the cascade box and the box at the adjacent level, so that the situation that the boxes at different levels are not synchronous in the transmission of the second type of signals is fully considered in the display process, and in view of the fact that the subimages corresponding to the received target data packets are displayed after the boxes are spaced by the preset time corresponding to the boxes per se, the subimages corresponding to the received target data packets can be synchronously displayed by the boxes, and the visual experience of a user is improved.
As an embodiment of the present invention, the above-mentioned signal transmission card may include a plurality of data ports, the plurality of boxes in the display screen can be divided into a plurality of box groups according to the column direction, the boxes in the same row are in the same level, the plurality of boxes in the same column are connected in cascade according to the column direction to form a box group, the number of the box groups is the same as the number of the data ports, the box groups correspond to the data ports one by one, each box in each box group respectively receives data packets which are simultaneously sent by the signal sending card through the corresponding data ports, each box in each box group sends a first type of signal to the signal sending card through the corresponding data port of the group, after receiving the first type signals sent by the boxes in all the box groups, the signal sending card sends the second type signals to the boxes in each box group.
Specifically, the preset time corresponding to each box 320 is calculated by the following formula:
Tr＝T0*(N-i)；
wherein, TrIs the preset time T corresponding to the box body r0The delay time required for transmitting the second type of signals between the boxes of adjacent levels, N is the number of boxes corresponding to the same data port, and i is the level of the box r in the cascaded box.
In one embodiment, each box 320 is specifically configured to:
receiving a target data packet group sent by an object of a previous level; the top box corresponds to the upper level object as a signal sending card, the other top box corresponds to the upper level object as the upper level box, and the signal sending card sends a target data packet group including: target data packets corresponding to boxes of all levels in the group;
extracting and storing a target data packet corresponding to the target data packet from the received target data packet group;
forming a new target data packet group by the target data packets except the target data packet corresponding to the target data packet group in the received target data packet group;
and transmitting the formed new target data packet group to the box body of the next level.
Specifically, each box 320 extracts and stores the target data packet corresponding to itself from the received target data packet group based on its own box identifier.
For the apparatus or system embodiments, since they are substantially similar to the method embodiments, they are described relatively simply, and reference may be made to some of the descriptions of the method embodiments for relevant points.
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.
Those skilled in the art will appreciate that all or part of the steps in the above method embodiments may be implemented by a program to instruct relevant hardware to perform the steps, and the program may be stored in a computer-readable storage medium, referred to herein as a storage medium, such as: ROM/RAM, magnetic disk, optical disk, etc.
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 (12)
1. A display method applied to a video wall display system, the video wall display system including a display screen and a signal transmission card, the display screen being composed of a plurality of boxes connected in a cascade connection manner, the signal transmission card being provided with a data port, the method comprising:
each box body receives a target data packet which is sent by the signal sending card through a data port and corresponds to the box body;
each box body sends a first type of signal to a data port of the signal sending card, so that the signal sending card sends a second type of signal to each box body after receiving all the first type of signals sent by all the box bodies; the first type of signal is a signal for indicating that the box body receives a target data packet, and the second type of signal is a signal for indicating that the box body displays a sub-image corresponding to the received target data packet;
when receiving a second type of signal sent by the signal sending card through a data port, each box body displays sub-images corresponding to received target data packets after a preset time corresponding to the box body, wherein the preset time is as follows: and the delay time is set based on the delay time for transmitting the second type of signals between the level of the corresponding box in the cascade box and the adjacent level of the corresponding box.
2. The method of claim 1, wherein the predetermined time corresponding to each box is calculated by the following formula:
Tr＝T0*(N-i)；
wherein, TrIs the preset time T corresponding to the box body r0The delay time required for transmitting the second type of signals between the boxes of adjacent levels, N is the number of boxes corresponding to the same data port, and i is the level of the box r in the cascaded box.
3. The method of claim 1, wherein each box receiving the destination data packet corresponding to the box itself and sent by the signaling card through the data port comprises:
each box body receives a target data packet group sent by an object of the previous level; the top-level box body corresponds to the upper-level object as the signal sending card, the other top-level boxes correspond to the upper-level objects as the upper-level boxes corresponding to the other top-level boxes, and the target data packet group sent by the signal sending card comprises: target data packets corresponding to boxes of all levels in the group;
each box body extracts and stores a target data packet corresponding to the box body from the received target data packet group;
each box body forms a new target data packet group by the target data packets except the target data packet corresponding to the box body in the received target data packet group;
and the box body of the previous level issues the formed new target data packet group to the box body of the next level.
4. The method of claim 3, wherein each box extracts and stores its own corresponding destination packet from the received destination packet group, including:
and based on the box body identification of the user, extracting and storing the target data packet corresponding to the user from the received target data packet group.
5. The method of any of claims 1-4, wherein the signaling card comprises a plurality of data ports, the plurality of boxes in the display screen are divided into a plurality of box groups according to the column direction, the boxes in the same row are in the same level, the plurality of boxes in the same column are connected in a cascade mode according to the column direction to form a box group, the number of the box groups is the same as the number of the data ports, the box groups correspond to the data ports one by one, each box in each box group respectively receives data packets sent by the signal sending card through the corresponding data port, each box in each box group sends a first type of signal to the signal sending card through the corresponding data port of the group, after receiving the first type signals sent by the boxes in all the box groups, the signal sending card sends the second type signals to the boxes in each box group.
6. The display equipment is characterized by being applied to a television wall display system, wherein the television wall display system comprises display equipment and a signal transmitting card, the display equipment comprises a display screen, the display screen consists of a plurality of boxes connected in a cascading manner, each box comprises a data packet receiving module, a signal transmitting module and a display module, and the signal transmitting card is provided with a data port; wherein,
the data packet receiving module is used for receiving a target data packet which is sent by the signal sending card through a data port and corresponds to the box body;
the signal sending module is used for sending first-class signals to a data port of the signal sending card so that the signal sending card sends second-class signals to each box after receiving all the first-class signals sent by all the boxes; the first type of signal is a signal for indicating that the box body receives a target data packet, and the second type of signal is a signal for indicating that the box body displays a sub-image corresponding to the received target data packet;
the display module is configured to display the sub-image corresponding to the received target data packet after a preset time corresponding to the display module is set, when the second type of signal sent by the signal sending card through the data port is received, where the preset time is: and the delay time is set based on the delay time for transmitting the second type of signals between the level of the corresponding box in the cascade box and the adjacent level of the corresponding box.
7. The apparatus of claim 6, wherein the predetermined time for each tank is calculated by the following formula:
Tr＝T0*(N-i)；
wherein Tr is a preset time corresponding to the box body r, T0The delay time required for transmitting the second type of signals between the boxes of adjacent levels, N is the number of boxes corresponding to the same data port, and i is the level of the box r in the cascaded box.
8. The apparatus of claim 6, wherein the packet receiving module comprises:
the data packet group receiving submodule is used for receiving a target data packet group sent by an object of the previous level; the top-level box body corresponds to the upper-level object as the signal sending card, the other top-level boxes correspond to the upper-level objects as the upper-level boxes corresponding to the other top-level boxes, and the target data packet group sent by the signal sending card comprises: target data packets corresponding to boxes of all levels in the group;
the data packet extraction submodule is used for extracting and storing the corresponding target data packet from the received target data packet group;
the data packet group forming submodule is used for forming the target data packets except the target data packet corresponding to the data packet group in the received target data packet group into a new target data packet group;
and the data packet group sending submodule is used for sending the formed new target data packet group to the next-level box body.
9. The device according to claim 8, wherein the packet extraction sub-module is specifically configured to:
and based on the box body identification of the user, extracting and storing the target data packet corresponding to the user from the received target data packet group.
10. The apparatus of any of claims 6-9, wherein the signaling card comprises a plurality of data ports, the plurality of boxes in the display screen are divided into a plurality of box groups according to the column direction, the boxes in the same row are in the same level, the plurality of boxes in the same column are connected in a cascade mode according to the column direction to form a box group, the number of the box groups is the same as the number of the data ports, the box groups correspond to the data ports one by one, each box in each box group respectively receives data packets sent by the signal sending card through the corresponding data port, each box in each box group sends a first type of signal to the signal sending card through the corresponding data port of the group, after receiving the first type signals sent by the boxes in all the box groups, the signal sending card sends the second type signals to the boxes in each box group.
11. A television wall display system is characterized by comprising a signal transmitting card and a display device, wherein the display device comprises a display screen, the display screen consists of a plurality of box bodies connected in a cascading manner, each box body comprises a data packet receiving module, a signal transmitting module and a display module, and the signal transmitting card is provided with a data port; wherein,
the signal transmitting card is used for transmitting a target data packet to each box body connected in a cascade mode through a data port, receiving first-class signals transmitted to the data port of the signal transmitting card by each box body, and transmitting second-class signals to each box body after receiving all the first-class signals transmitted by all the box bodies; the first type of signal is a signal for indicating that the box body receives a target data packet, and the second type of signal is a signal for indicating that the box body displays a sub-image corresponding to the received target data packet;
each box body in the display screen is used for receiving a target data packet which is sent by the signal sending card through a data port and corresponds to the box body; sending first-class signals to a data port of the signal sending card, so that the signal sending card sends second-class signals to each box body after receiving all the first-class signals sent by all the box bodies; when a second type of signal sent by the signal sending card through a data port is received, displaying a subimage corresponding to the received target data packet after a preset time corresponding to the signal sending card, wherein the preset time is as follows: and the delay time is set based on the delay time for transmitting the second type of signals between the level of the corresponding box in the cascade box and the adjacent level of the corresponding box.
12. The system of claim 11, wherein the signaling card includes a plurality of data ports, the plurality of boxes in the display screen are divided into a plurality of box groups according to the column direction, the boxes in the same row are in the same level, the plurality of boxes in the same column are connected in a cascade mode according to the column direction to form a box group, the number of the box groups is the same as the number of the data ports, the box groups correspond to the data ports one by one, each box in each box group respectively receives data packets sent by the signal sending card through the corresponding data port, each box in each box group sends a first type of signal to the signal sending card through the corresponding data port of the group, after receiving the first type signals sent by the boxes in all the box groups, the signal sending card sends the second type signals to the boxes in each box group.
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