CN111818372A - Image display method, system, display device and storage medium - Google Patents
Image display method, system, display device and storage medium Download PDFInfo
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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
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
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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
- H04N21/4305—Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
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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
- 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
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/485—End-user interface for client configuration
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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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
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Abstract
The application discloses an image display method, an image display system, a display device and a storage medium, and relates to the technical field of display. The image display method includes: establishing a mapping table according to the number of the display devices, the resolution of each display device and the resolution of the original image, and determining the mapping relation between the coordinate points in the global coordinate system and the pixel points in the original image; determining a local display image of the main display device according to the identifier of the main display device and the mapping table; transmitting a first data packet to each slave display device, wherein the first data packet comprises an original image and a mapping table; and displaying a partial display image of the main display device according to the transmission result of the first data packet. The image display method, the image display system, the display device and the storage medium can reduce the data size distributed to the slave display device by the master display device, thereby reducing the transmission delay and the display delay.
Description
Technical Field
The embodiments of the present application relate to, but are not limited to, the field of display technologies, and in particular, to an image display method, system, display device, and storage medium.
Background
The multi-screen display is to display a complete image through a plurality of display devices together, the plurality of display devices include a master display device and at least one slave display device, the master display device distributes image data to each slave display device, and the master display device and each slave display device display a complete image together. In a conventional multi-screen display method, a master display device first amplifies an image and then distributes the amplified image to each slave display device, and the slave display devices display the image of a corresponding portion after receiving image data. In this way, the amount of data distributed by the master display device to the slave display devices is very large, resulting in a large transmission delay and display delay.
Disclosure of Invention
The embodiment of the application provides an image display method, an image display system, a display device and a storage medium, which can reduce the size of data volume distributed to a slave display device by a master display device, thereby reducing transmission delay and display delay.
In a first aspect, an embodiment of the present application provides an image display method, which is applied to a master display device, where the master display device is in communication connection with at least one slave display device, and the method includes:
establishing a global coordinate system according to the number of display devices and the resolution of each display device, wherein each display device comprises a main display device and a slave display device;
establishing a mapping table according to the global coordinate system and the resolution of the original image, wherein the mapping table is used for determining the mapping relation between the coordinate points in the global coordinate system and the pixel points in the original image;
determining a local display image of the main display device according to the identifier of the main display device and the mapping table, wherein the local display image of the main display device is a local image of the original image;
transmitting a first data packet to each slave display device, wherein the first data packet comprises an original image and a mapping table;
and displaying a partial display image of the main display device according to the transmission result of the first data packet.
The image display method of the embodiment of the application has at least the following beneficial effects:
1. the main display device does not need to amplify the original image, but only amplifies the local area of the original image, so that the display time delay of the main display device can be reduced.
2. The main display device does not need to transmit the amplified original image in a packet mode, and transmits the original image to each slave display device, so that the size of data distributed to the slave display devices by the main display device can be reduced, and the transmission delay is reduced.
In a second aspect, an embodiment of the present application provides an image display method, where the image display method is applied to a slave display device according to some embodiments of the present application, and the method includes:
receiving a first data packet, wherein the first data packet comprises an original image and a mapping table;
determining a local display image of the slave display device according to the identifier of the slave display device and the mapping table, wherein the local display image of the slave display device is a local image of the original image;
transmitting a second data packet, the second data packet including an identification of the slave display device;
and displaying the partial display image of the slave display device according to the transmission result of the second packet.
According to the image display method, the slave display device does not need to receive the amplified original image, only receives the original image, and amplifies and displays the local area of the original image, so that the display time delay of the slave display device can be reduced.
In a third aspect, an embodiment of the present application provides a display device, where the display device includes a display screen, a memory, a processor, a program stored in the memory and executable on the processor, and a data bus for implementing connection communication between the processor and the memory, where the program, when executed by the processor, implements: an image display method of some embodiments of the present application.
The image display device of the embodiment of the application has at least the following beneficial effects:
1. when the display device is a main display device, an image display method applied to the main display device is executed, and the original image is respectively sent to each slave display device, so that the size of the data volume distributed to the slave display devices by the main display device can be reduced, and the transmission delay is reduced; only a local area of the original image is enlarged, so that the display time delay of the main display device can be reduced.
2. When the display device is the slave display device, the image display method applied to the slave display device is executed, only the original image is received, and the local area of the original image is displayed in an enlarged manner, so that the display time delay of the slave display device can be reduced.
In a fourth aspect, embodiments of the present application provide an image display system, where the image display system includes a master display device and at least one slave display device, the master display device is configured to perform the image display method according to some embodiments of the present application, and the slave display device is configured to perform the image display method according to some other embodiments of the present application.
The image display system of the embodiment of the application can realize multi-screen display through interaction between the main display equipment and the auxiliary display equipment; the main display device does not need to transmit the amplified original image in a sub-packet mode, and transmits the original image to each slave display device respectively, so that the size of data volume distributed to the slave display devices by the main display device can be reduced, and the transmission delay is reduced; the main display device only amplifies the local area of the original image without amplifying the original image, so that the display time delay of the main display device can be reduced; the slave display device receives only the original image without receiving the amplified original image, and amplifies and displays a local area of the original image, thereby reducing the display delay of the slave display device.
In a fifth aspect, embodiments of the present application provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform: an image display method of some embodiments of the present application; alternatively, an image display method according to another embodiment of the present application.
The computer-readable storage medium of the embodiment of the application has at least the following beneficial effects:
1. by executing the image display method applied to the main display device, the original image is respectively sent to the slave display devices, so that the size of the data amount distributed to the slave display devices by the main display device can be reduced, and the transmission delay is reduced; only a local area of the original image is enlarged, so that the display time delay of the main display device can be reduced.
2. By executing the image display method applied to the slave display device, only the original image is received, and the local area of the original image is displayed in an enlarged manner, so that the display time delay of the slave display device can be reduced.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
FIG. 1 is a flowchart illustrating an image display method according to an embodiment of the present application;
FIG. 2 is a flowchart illustrating an embodiment of step S130 in FIG. 1;
FIG. 3 is a schematic flow chart diagram illustrating an embodiment after step S140 in FIG. 1;
FIG. 4 is a schematic flow chart diagram illustrating an embodiment of the method after step S130 in FIG. 1;
FIG. 5 is a flowchart illustrating an image display method according to another embodiment of the present application;
FIG. 6 is a flowchart illustrating an embodiment of step S520 of FIG. 5;
FIG. 7 is a flowchart illustrating an embodiment of the method after step S520 of FIG. 5;
fig. 8 is a block diagram of a display device according to an embodiment of the present application;
fig. 9 is a block diagram of an image display system according to an embodiment of the present application.
Reference numerals:
a display device 800; a display screen 801; a memory 802; a processor 803; an image display system 900; a main display device 901; from the display device 902.
Detailed Description
The conception and the resulting technical effects of the present application will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive efforts based on the embodiments of the present application belong to the protection scope of the present application.
In the description of the present application, if an orientation description is referred to, for example, a positional relationship based on an orientation or a positional relationship shown in the drawings, it is only for convenience of description and simplification of description, and it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. If reference is made to "first", "second", "third" and "fourth", this is to be understood as being used to distinguish between features, and is not to be construed as indicating or implying a relative importance or implicit indication of the number of features indicated or implicit indication of the precedence of the features indicated.
In the embodiment of the application, the multi-screen display is to display a complete image by a plurality of display devices together, and the plurality of display devices comprise a master display device and at least one slave display device. The image data is distributed by the master display device to the respective slave display devices.
In a first aspect, an embodiment of the present application provides an image display method, and with reference to fig. 1, the image display method is applied to a master display device, where the master display device is in communication connection with at least one slave display device, and the method includes the following specific steps:
s110, establishing a global coordinate system according to the number of display devices and the resolution of each display device, wherein each display device comprises a main display device and a slave display device;
s120, establishing a mapping table according to the global coordinate system and the resolution of the original image, wherein the mapping table is used for determining the mapping relation between the coordinate points in the global coordinate system and the pixel points in the original image;
s130, determining a local display image of the main display device according to the identifier of the main display device and the mapping table, wherein the local display image of the main display device is a local image of the original image;
s140, sending a first data packet to each slave display device, wherein the first data packet comprises an original image and a mapping table;
and S150, displaying the local display image of the main display device according to the transmission result of the first data packet.
In some embodiments, step S110, for example, concatenates n × m display devices, each having a resolution a × b, numbers the n × m display devices in order from left to right and from top to bottom, and numbers the first display device as a main display device, where the number is 0. And establishing a global coordinate system, wherein the maximum value of an X axis is n & lta & gt, the maximum value of a Y axis is m & ltb & gt, and n, m, a and b are positive integers. In step S120, for example, the resolution of the original image is w × h, where w and h are positive integers. Establishing a mapping relation between the original image and a global coordinate system, and aiming at a coordinate point (x) in the global coordinate system0，y0) Corresponding to a pixel point (x) in the original image0*w/(n*a)，y0H/(m b)). And establishing a mapping table in which the area occupied by each display device in the global coordinate system corresponds to the corresponding area in the original image according to the mapping relation between the coordinate points in the global coordinate system and the pixel points in the original image. For example, for a display device numbered i, 0<i<n, the occupied area in the global coordinate system is { x ═ a, (i +1) × a]，y＝[0，b]And the area mapped to the original image is { x ═ w/n, (i +1) × w/n]，y＝[0，h/m]}; if n is less than or equal to i<2n, the area occupied in the global coordinate system is { x ═ i [ (i-n) × a, (i-n +1) × a]，y＝[b，2*b]And the area mapped to the original image is { x ═ i-n) × w/n, (i-n +1) × w/n]，y＝[h/m，2*h/m]}; if n is not more than m-1, i<n m, the region occupied in the global coordinate system is { x ═ i [ (i-n ═ (m-1)). a, (i-n ═ m-1) + 1). a]，y＝[(m-1)*b，m*b]And the area mapped to the original image is { x ═ [ (i-n ═ (m-1)) × w/n, (i-n ═ (m-1) +1) × w/n } w/n]，y＝[(m-1)*h/m，h]}。
Step S130, referring to fig. 2, includes the following specific steps:
s210, determining a first area of the main display device in the global coordinate system according to the identification of the main display device;
s220, determining a second area of the main display device in the original image according to the mapping table and the first area;
and S230, amplifying the local image of the second area to obtain a local display image of the main display device.
In some embodiments, the primary display device is numbered 0, and the primary display device is located first of all display devices in left-to-right, top-to-bottom order. Taking the number of the device as an identifier, the identifier of the main display device is 0, the resolution is a, and in the global coordinate system, the area occupied by the main display device is { x ═ 0, a ], y ═ 0, b }. According to the mapping relationship between the coordinate points in the global coordinate system and the pixel points in the original image determined in step S120, it can be obtained that the area occupied by the main display device in the global coordinate system corresponds to the area in the original image, where { x ═ 0, w/n ], and y ═ 0, h/m }. The original image is displayed in multiple screens, the original image does not need to be amplified, and only the region { x ═ 0, w/n }, y ═ 0, h/m }, is amplified to obtain a local display image of the main display device, so that the display time delay of the main display device can be reduced.
In some embodiments, step S140, the master display device transmits a data packet to each of the slave display devices, the data packet including the original image and the mapping table. The method comprises the steps that the area occupied by the display equipment in a global coordinate system can be obtained through identification calculation of the equipment, the corresponding area of the display equipment in an original image is obtained through mapping table inquiry, a corresponding local image is extracted from the original image, and when the image is displayed, the local image is amplified to obtain a local display image. The main display device does not need to transmit the amplified original image in a packet mode, and transmits the original image to each slave display device, so that the size of data distributed to the slave display devices by the main display device can be reduced, and the transmission delay is reduced.
In other embodiments, referring to fig. 3, the following steps are further included after step S140:
s310, setting a flag bit, wherein the flag bit is used for marking whether the first data packet is successfully sent or not;
s320, receiving a second data packet, wherein the second data packet comprises an identifier of the slave display device;
s330, judging whether a second data packet is received or not; if the second data packet is received, step S340 is executed; otherwise, go to step S350;
s340, marking the flag bit as that the first data packet is successfully sent;
s350, the first data packet is sent again;
s360, judging whether a second data packet sent by each slave display device is received; if receiving each second data packet transmitted from the display device, performing step S370; otherwise, go to step S350;
and S370, sending a display instruction.
In some embodiments, the master display device sends the first data packets to each of the slave display devices, and a sending result of each first data packet needs to be obtained, so that a problem of local image loss during multi-screen display is avoided. The main display device sets a flag bit for the first data packet sent to each slave display device, the flag bit can be marked by binary 0 or 1, and if the flag bit is 1, the first data packet is failed to be sent; if the flag bit is 0, it indicates that the first data packet is successfully transmitted. In other embodiments, the flag may be marked with a custom letter, number, or symbol. Whether the first packet is successfully transmitted or not is determined depending on whether or not the second packet transmitted from the display apparatus is received, and the flag is set to 1 at its initial value and cleared to 0 if the second packet is received. If the slave display equipment receives the first data packet, a second data packet is sent to the master display equipment; and if the slave display equipment does not receive the first data packet, not feeding back the master display equipment, and if the master display equipment does not receive the second data packet within the preset time, re-sending the first data packet to the slave display equipment. And after the main display equipment confirms that each first data packet is successfully sent, sending a display instruction to each slave display equipment, and realizing multi-screen synchronous display through the display instruction. The main display device displays the partial display image processed in step S130 after transmitting the display instruction.
In some embodiments, referring to fig. 4, if the second data packet is received, the following steps are further performed:
s410, recording a second time stamp;
and S420, sending a second time stamp.
The timestamp, which refers to the total number of seconds from 00 minutes 00 seconds to the current 00 hours on 01/1970 of greenwich mean time, is a complete and verifiable piece of data that can indicate that a piece of data already exists at a particular point in time. Receiving a first data packet from the display device, sending a second data packet to the main display device, and recording a first time stamp (tick 1); the master display device receives the second data packet fed back by the slave display devices, records a second time stamp (tick2), and sends the second time stamp to each slave display device; receiving the second time stamp from the display device, recording a third time stamp (tick 3); the master display device transmits a display instruction to the slave display device, and the slave display device records a fourth time stamp (tick4) upon receiving the display instruction. Wherein, the difference (Δ tick 1-tick 1) between the third timestamp (tick3) and the first timestamp (tick1) is the time delay for transmitting data to and from the slave display device during the bidirectional information interaction with the master display device, the time delay for transmitting data unidirectionally from the slave display device to the master display device is half ((Δ tick1)/2) of the difference between the third timestamp (tick3) and the first timestamp (tick1), the third timestamp (tick3) recorded by the slave display device corresponds to the fifth timestamp (tick5 tick2+ (Δ tick1)/2 recorded by the master display device, and the difference between the third timestamp (tick3) and the fifth timestamp (tick5) is the difference (Δ tick 2-3-tick 5-tick 68624)/Δ tick 1- (Δ tick 599) + 1)/24 (Δ tick 68624) recorded by the slave display device and the master display device. The slave display device can obtain the timestamp difference value between the slave display device and the master display device through the calculation process, and the timestamp synchronous with the master display device can be obtained by adding the timestamp difference value to the current timestamp. In the time synchronization process, the master display device does not perform time synchronization operation, but each slave display device performs time synchronization operation, so that the data load pressure of the master display device can be reduced, and each slave display device only synchronizes the time of the slave display device and the master display device by dispersing the data processing process of the time synchronization operation, so that the data processing time delay of the image display system can be reduced.
In a second aspect, an embodiment of the present application provides an image display method, and referring to fig. 5, the image display method is applied to a slave display device according to some embodiments of the present application, and the method includes the following specific steps:
s510, receiving a first data packet, wherein the first data packet comprises an original image and a mapping table;
s520, determining a local display image of the slave display device according to the identifier of the slave display device and the mapping table, wherein the local display image of the slave display device is a local image of the original image;
s530, sending a second data packet, wherein the second data packet comprises an identifier of the slave display equipment;
and S540, displaying the partial display image of the slave display equipment according to the transmission result of the second data packet.
Referring to fig. 6, step S520 includes the following specific steps:
s610, determining a third area of the slave display equipment in the global coordinate system according to the identification of the slave display equipment;
s620, determining a fourth area in the original image from the display device according to the mapping table and the third area;
and S630, amplifying the partial image of the fourth area to obtain a partial display image of the slave display equipment.
In some embodiments, a first packet transmitted by a master display device is received from the display device, the first packet including an original image and a mapping table. The mapping table stores the mapping relation between the area occupied by each display device in the global coordinate system and the corresponding area in the original image. The slave display equipment inquires the area occupied by the slave display equipment in the global coordinate system through the identification of the equipment, namely the number of each display equipment when the master display equipment establishes the global coordinate system, wherein the number of the master display equipment is 0, and the slave display equipmentThe serial numbers of the slave display devices are related to the positions of the slave display devices, and the serial numbers of the slave display devices are sequentially numbered from left to right and from top to bottom from the master display device, wherein the serial numbers of the slave display devices are positive integers. For example, n × m display devices are spliced together, each display device has a resolution a × b, the n × m display devices are numbered in the order from left to right and from top to bottom, and the number of the main display device is 0. In the global coordinate system, the maximum value of the X axis is n a, the maximum value of the Y axis is m b, wherein n, m, a and b are positive integers. The resolution of the original image is w x h, wherein w and h are positive integers. For a coordinate point (x) in the global coordinate system0，y0) Corresponding to a pixel point (x) in the original image0*w/(n*a)，y0H/(m b)). For the slave display device with number i, if 0<i<n, the occupied area in the global coordinate system is { x ═ a, (i +1) × a]，y＝[0，b]And the area mapped to the original image is { x ═ w/n, (i +1) × w/n]，y＝[0，h/m]}; if n is less than or equal to i<2n, the area occupied in the global coordinate system is { x ═ i [ (i-n) × a, (i-n +1) × a]，y＝[b，2*b]And the area mapped to the original image is { x ═ i-n) × w/n, (i-n +1) × w/n]，y＝[h/m，2*h/m]}; if n is not more than m-1, i<n m, the region occupied in the global coordinate system is { x ═ i [ (i-n ═ (m-1)). a, (i-n ═ m-1) + 1). a]，y＝[(m-1)*b，m*b]And the area mapped to the original image is { x ═ [ (i-n ═ (m-1)) × w/n, (i-n ═ (m-1) +1) × w/n } w/n]，y＝[(m-1)*h/m，h]}. By means of the mapping table, the master display device does not need to transmit the amplified original image packets to the slave display devices, but transmits the original image packets to each of the slave display devices. The method comprises the steps of receiving an original image from a display device, obtaining a mapping relation between an area occupied by the original image in a global coordinate system and a corresponding area in the original image by inquiring a mapping table, and obtaining a local display image by amplifying the corresponding area of the original image, so that the display delay and the transmission delay of a main display device can be reduced, and the display delay of a slave display device can be reduced.
The slave display equipment receives the first data packet and feeds back a second data packet to the master display equipment, wherein the second data packet comprises the identification of the slave display equipment, and the master display equipment can know which slave display equipment has received the first data packet and the area occupied by the slave display equipment which has received the first data packet in the global coordinate system by identifying the identification of each slave display equipment. And if the main display device receives all the second data packets fed back by the slave display devices, sending a display instruction to each slave display device, receiving the display instruction from the slave display device, extracting a corresponding local image from the original image, and amplifying the local image to obtain a local display image when the image is displayed. The slave display device receives only the original image without receiving the amplified original image, and amplifies and displays a local area of the original image, thereby reducing the display delay of the slave display device.
In some embodiments, referring to fig. 7, the image display method further includes the following specific steps:
s710, sending a second data packet, and recording a first time stamp;
s720, receiving the second timestamp, and recording a third timestamp;
s730, calculating according to the first time stamp, the second time stamp and the third time stamp to obtain a time difference between the main display device and the auxiliary display device;
s740, receiving a display instruction and recording a fourth time stamp;
s750, calculating to obtain synchronous display time between the main display device and the auxiliary display device according to the fourth time stamp and the time difference;
and S760, displaying the local display image of the slave display equipment according to the synchronous display time.
Steps S710 to S760 are procedures in which the slave display device synchronizes its time stamp to the master display device time stamp. Receiving a first data packet from the display device, sending a second data packet to the main display device, and recording a first time stamp (tick 1); the master display device receives the second data packet fed back by the slave display devices, records a second time stamp (tick2), and sends the second time stamp to each slave display device; receiving the second time stamp from the display device, recording a third time stamp (tick 3); the master display device transmits a display instruction to the slave display device, and the slave display device records a fourth time stamp (tick4) upon receiving the display instruction. Wherein, the difference (Δ tick 1-tick 1) between the third timestamp (tick3) and the first timestamp (tick1) is the time delay for transmitting data to and from the slave display device during the bidirectional information interaction with the master display device, the time delay for transmitting data unidirectionally from the slave display device to the master display device is half ((Δ tick1)/2) of the difference between the third timestamp (tick3) and the first timestamp (tick1), the third timestamp (tick3) recorded by the slave display device corresponds to the fifth timestamp (tick5 tick2+ (Δ tick1)/2 recorded by the master display device, and the difference between the third timestamp (tick3) and the fifth timestamp (tick5) is the difference (Δ tick 2-3-tick 5-tick 68624)/Δ tick 1- (Δ tick 599) + 1)/24 (Δ tick 68624) recorded by the slave display device and the master display device. The slave display device can obtain the timestamp difference value between the slave display device and the master display device through the calculation process, and the timestamp synchronous with the master display device can be obtained by adding the timestamp difference value to the current timestamp. In the time synchronization process, the master display device does not perform time synchronization operation, but each slave display device performs time synchronization operation, so that the data load pressure of the master display device can be reduced, and each slave display device only synchronizes the time of the slave display device and the master display device by dispersing the data processing process of the time synchronization operation, so that the data processing time delay of the image display system can be reduced.
In a third aspect, referring to fig. 8, an embodiment of the present application provides a display device 800, the display device 800 includes a display screen 801, a memory 802, a processor 803, a program stored on the memory and operable on the processor, and a data bus for implementing connection communication between the processor and the memory, the program when executed by the processor implements: an image display method of some embodiments of the present application.
When the display device is a main display device, an image display method applied to the main display device is executed, and the original image is respectively sent to each slave display device, so that the size of the data volume distributed to the slave display devices by the main display device can be reduced, and the transmission delay is reduced; only a local area of the original image is enlarged, so that the display time delay of the main display device can be reduced. When the display device is the slave display device, the image display method applied to the slave display device is executed, only the original image is received, and the local area of the original image is displayed in an enlarged manner, so that the display time delay of the slave display device can be reduced.
The main display device and the auxiliary display device are both electronic devices with display screens. The display screen is used for displaying images, videos and the like, and the display screen includes a display panel, and the display panel may adopt a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED), a flexible light-emitting diode (FLED), a miniature, a Micro-OLED, a quantum dot light-emitting diode (QLED), and the like. The display device may be a mobile phone, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, a Personal Digital Assistant (PDA), an Augmented Reality (AR) Virtual Reality (VR) device, and the like including the above display screen.
In a fourth aspect, referring to fig. 9, an embodiment of the present application provides an image display system 900, where the image display system 900 includes a master display device 901 and at least one slave display device 902, the master display device is configured to perform an image display method according to some embodiments of the present application, and the slave display device is configured to perform an image display method according to some other embodiments of the present application.
In some embodiments, the image display system may include N display devices, N being a positive integer greater than 1. The master display device and the respective slave display devices are connected to each other, for example, the master display device is connected to the second slave display device through the first slave display device. In the process of sending the first data packet by the main display device, the first slave display device receives the first data packet sent by the main display device and forwards the first data packet to the second slave display device. In the process of feeding back the second data packet by the second slave display device, the first slave display device feeds back the generated second data packet to the master display device and forwards the second data packet fed back by the second slave display device to the master display device. In other embodiments, a master display device is connected to each slave display device separately. The image display system can realize multi-screen display through the interaction between the main display equipment and the auxiliary display equipment; the main display device does not need to transmit the amplified original image in a sub-packet mode, and transmits the original image to each slave display device respectively, so that the size of data volume distributed to the slave display devices by the main display device can be reduced, and the transmission delay is reduced; the main display device only amplifies the local area of the original image without amplifying the original image, so that the display time delay of the main display device can be reduced; the slave display device receives only the original image without receiving the amplified original image, and amplifies and displays a local area of the original image, thereby reducing the display delay of the slave display device.
In the display device of the embodiment of the Application, the Processor may be a Central Processing Unit (CPU), or may be other general-purpose processors, Digital Signal Processors (DSP), Application Specific Integrated Circuits (ASIC), Field-Programmable Gate arrays (FPGA) or other Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor being the control center of the executable apparatus of the image display method, various interfaces and lines connecting the various parts of the executable apparatus of the entire image display method.
The memory may be used to store computer programs and/or modules, and the processor may implement various functions of the executable apparatus of the image display method by operating or executing the computer programs and/or modules stored in the memory and calling data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
In a fifth aspect, embodiments of the present application provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform: an image display method of some embodiments of the present application; alternatively, an image display method according to another embodiment of the present application.
The computer readable storage medium transmits the original image to each of the slave display apparatuses by performing an image display method applied to the master display apparatus, respectively, thereby enabling to reduce the size of the amount of data distributed to the slave display apparatuses by the master display apparatus, thereby reducing the transmission delay; only a local area of the original image is enlarged, so that the display time delay of the main display device can be reduced. By executing the image display method applied to the slave display device, only the original image is received, and the local area of the original image is displayed in an enlarged manner, so that the display time delay of the slave display device can be reduced.
The computer-readable storage medium of an embodiment of the present application includes: a U disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
Claims (10)
1. An image display method applied to a master display device which is communicatively connected to at least one slave display device, the method comprising:
establishing a global coordinate system according to the number of display devices and the resolution of each display device, wherein the display devices comprise a main display device and a slave display device;
establishing a mapping table according to the global coordinate system and the resolution of the original image, wherein the mapping table is used for determining the mapping relation between the coordinate points in the global coordinate system and the pixel points in the original image;
determining a local display image of the main display device according to the identifier of the main display device and the mapping table, wherein the local display image of the main display device is a local image of the original image;
sending a first data packet to each of the slave display devices, the first data packet including the original image and the mapping table;
and displaying a local display image of the main display device according to the transmission result of the first data packet.
2. The image display method according to claim 1, wherein the determining the partial display image of the primary display device according to the identifier of the primary display device and the mapping table comprises:
determining a first area of the main display device in the global coordinate system according to the identifier of the main display device;
determining a second area of the main display device in the original image according to the mapping table and the first area;
and amplifying the local image of the second area to obtain a local display image of the main display equipment.
3. The image display method according to claim 1 or 2, characterized in that the method further comprises:
setting a flag bit, wherein the flag bit is used for marking whether the first data packet is successfully sent;
receiving a second data packet comprising an identification of the slave display device;
judging whether the second data packet is received or not;
if the second data packet is received, marking the flag bit as that the first data packet is successfully sent;
if the second data packet is not received, the first data packet is retransmitted;
and if the second data packet sent by each slave display device is received, sending a display instruction.
4. The image display method according to claim 3, wherein after determining whether the second packet is received, further comprising:
if the second data packet is received, recording a second time stamp;
and sending the second time stamp.
5. An image display method applied to the slave display apparatus according to any one of claims 1 to 4, the method comprising:
receiving the first data packet, wherein the first data packet comprises the original image and the mapping table;
determining a local display image of the slave display device according to the identifier of the slave display device and the mapping table, wherein the local display image of the slave display device is a local image of the original image;
transmitting the second data packet, the second data packet including an identification of the slave display device;
and displaying a local display image of the slave display device according to the transmission result of the second data packet.
6. The image display method according to claim 5, wherein the determining the partial display image of the slave display device according to the identifier of the slave display device and the mapping table comprises:
determining a third area of the slave display device in the global coordinate system according to the identification of the slave display device;
determining a fourth area of the slave display device in the original image according to the mapping table and the third area;
and amplifying the local image of the fourth area to obtain a local display image of the slave display equipment.
7. The image display method according to claim 5 or 6, characterized in that the method further comprises:
sending the second data packet, and recording a first time stamp;
receiving the second time stamp, and recording a third time stamp;
calculating a time difference between the master display device and the slave display device according to the first time stamp, the second time stamp and the third time stamp;
receiving the display instruction, and recording a fourth timestamp;
calculating to obtain synchronous display time between the main display device and the slave display device according to the fourth timestamp and the time difference;
and displaying the local display image of the slave display equipment according to the synchronous display time.
8. Display device, characterized in that it comprises a display screen, a memory, a processor, a program stored on said memory and executable on said processor and a data bus for enabling a connection communication between said processor and said memory, said program, when executed by said processor, enabling:
the image display method according to any one of claims 1 to 4;
alternatively, the first and second electrodes may be,
an image display method as claimed in any one of claims 5 to 7.
9. Image display system, characterized in that it comprises a master display device for performing the image display method of any one of claims 1 to 4 and at least one slave display device for performing the image display method of any one of claims 5 to 7.
10. A computer-readable storage medium having computer-executable instructions stored thereon for causing a computer to perform:
the image display method according to any one of claims 1 to 4;
alternatively, the first and second electrodes may be,
an image display method as claimed in any one of claims 5 to 7.
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