CN113424551B - Playing method, device and system and computer readable storage medium - Google Patents
Playing method, device and system and computer readable storage medium Download PDFInfo
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- CN113424551B CN113424551B CN201980074664.3A CN201980074664A CN113424551B CN 113424551 B CN113424551 B CN 113424551B CN 201980074664 A CN201980074664 A CN 201980074664A CN 113424551 B CN113424551 B CN 113424551B
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000004891 communication Methods 0.000 claims description 44
- 238000001228 spectrum Methods 0.000 claims description 35
- 238000005516 engineering process Methods 0.000 claims description 21
- 238000012937 correction Methods 0.000 claims description 5
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 description 25
- 238000012544 monitoring process Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
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- 239000000463 material Substances 0.000 description 7
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- 230000005540 biological transmission Effects 0.000 description 5
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- 230000003287 optical effect Effects 0.000 description 3
- 238000009877 rendering Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
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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
Abstract
A playback method, a playback apparatus, and a playback system, and a computer-readable storage medium, the playback method being applied to a display system including a plurality of display terminals controlled independently of each other, comprising: acquiring a reference time, and adjusting an absolute time to be consistent with the reference time (S11); acquiring a program scheduling time length and a program to be played at a preset absolute time point (S12); calculating a play starting time point according to the preset absolute time point and the program scheduling time length (S13); and starting to play the program to be played at the starting play time point (S14). The method can realize the synchronicity of the programs played by a plurality of display screens.
Description
Technical Field
The present invention relates to the field of display screen playing technology, and in particular, to a playing method, a playing device, a playing system, and a computer readable storage medium.
Background
At present, LED display screens are developed in the directions of low power consumption, small pitch and lighter weight, wherein LED full-color display screens have natural display advantages of bright color, high brightness and the like, and are applied to various industries. In the event of the performance, the director can innovate own artistic creation continuously, the artistic creation of the director needs to be realized by matching with various performance properties, and a plurality of LED display screens are used as the performance properties to match with actors to walk, so that the good combination of the art and the technology can be realized.
However, in the practical application process, the synchronicity of playing programs on multiple display screens needs to be ensured to realize that the program contents played on the multiple display screens form a complete picture, but no related solution exists at present. Therefore, providing a mechanism for synchronously playing multiple display screens is a technical problem to be solved in the invention.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art and provides a playing method, a playing device, a playing system and a computer readable storage medium, which can realize the synchronicity of playing programs on a plurality of display screens.
In a first aspect, an embodiment of the present invention proposes a playing method applied to a display system including a plurality of display terminals controlled independently of each other, including: acquiring reference time, and adjusting the absolute time and the reference time to be consistent; acquiring program scheduling time length and a program to be played at a preset absolute time point; calculating a play starting time point according to the preset absolute time point and the program scheduling time length; and starting to play the program to be played at the starting play time point.
There is no related solution in the prior art to achieve synchronicity of the programs played by multiple display screens. The playing method disclosed by the embodiment of the invention is applied to a display system comprising a plurality of display terminals which are controlled independently, the absolute time and the reference time are adjusted to be consistent by acquiring the reference time, then the program scheduling duration is acquired at the preset absolute time point to calculate the starting playing time point, and the program to be played is started to be played at the starting playing time point, so that the synchronism of the programs played by the plurality of display terminals can be realized, namely, the program content played by the plurality of display terminals can form a complete picture, the operation is simple, and the user experience is improved.
In one embodiment of the present invention, the acquiring the program scheduling duration and the program to be played at the preset absolute time point includes: receiving a program playing instruction at the preset absolute time point; and acquiring the program scheduling time length and the program to be played according to the program playing instruction.
In one embodiment of the present invention, the acquiring the reference time specifically includes: periodically receiving a time calibration instruction at a preset frequency; and acquiring the reference time according to the time calibration instruction.
In a possible implementation manner of the first aspect of the present invention, the periodically receiving a time calibration instruction at a preset frequency specifically includes: and periodically receiving an interrupt signal through a GPS signal at the preset frequency to serve as the time calibration instruction.
In one embodiment of the present invention, the periodically receiving a time calibration command at a preset frequency specifically includes: and periodically receiving the time calibration instruction by the preset frequency through a wireless radio frequency communication mode.
In one embodiment of the present invention, the program scheduling duration is a maximum duration consumed by the plurality of display terminals in the display system to read and render the program to be played; the step of obtaining the program scheduling duration specifically comprises the following steps: sending a time length acquisition request to an upper computer, wherein the upper computer is used for controlling the plurality of display terminals; receiving the program scheduling duration sent by the upper computer according to the duration acquisition request; the program scheduling duration is obtained by issuing a maximum resolution image to the plurality of display terminals through the upper computer so as to record the time when each display terminal starts to call the maximum resolution image and the time when each display terminal starts to play the maximum resolution image, calculating the scheduling time of each display terminal according to the time when each display terminal starts to call the maximum resolution image and the time when each display terminal starts to play the maximum resolution image, and selecting the maximum value of the scheduling time corresponding to the plurality of display terminals.
In one embodiment of the present invention, the obtaining the program to be played according to the program playing instruction specifically includes: determining a program sequence number to be played according to the program playing instruction; and reading the corresponding program to be played according to the program serial number to be played.
In one embodiment of the present invention, the calculating a play start time point according to the preset absolute time point and the program scheduling duration specifically includes: and summing the preset absolute time point and the program scheduling time length to obtain the play starting time point.
In one embodiment of the present invention, after the playing of the program to be played is started at the starting playing time point, the method further includes: and playing the program to be played through an audio and video synchronization technology based on the absolute time.
In a second aspect, another embodiment of the present invention proposes a playback apparatus applied to a display system including a plurality of display terminals controlled independently of each other, and configured to perform any one of the playback methods described above, the playback apparatus including: the time adjustment module is used for acquiring reference time and adjusting the absolute time and the reference time to be consistent; the information acquisition module is used for acquiring the program scheduling time length and the program to be played at a preset absolute time point; the time calculation module is used for calculating and obtaining a play starting time point according to the preset absolute time point and the program scheduling duration; and the program playing module is used for starting to play the program to be played at the starting playing time point.
In a third aspect, still another embodiment of the present invention provides a playing system, including: a plurality of display terminals independently controlled to be movably dispersed at different positions; wherein each of the display terminals includes: a display screen body; the control card is connected with the display screen body, and comprises: the programmable logic device is connected with the display screen body; and the processor is connected with the programmable logic device and is used for: acquiring reference time, and adjusting the absolute time and the reference time to be consistent; acquiring program scheduling time length and a program to be played at a preset absolute time point; calculating to obtain a play starting time point according to the preset absolute time point and the program scheduling time length; and starting to play the program to be played at the starting play time point.
In one embodiment of the present invention, the processor obtains the reference time, specifically including: periodically receiving a time calibration instruction at a preset frequency; and acquiring the reference time according to the time calibration instruction.
In one embodiment of the present invention, the foregoing playing system further includes: the main control server is used for issuing a program playing instruction; the wireless spread spectrum communication base station is connected with the main control server and is used for forwarding the program playing instruction in a wireless spread spectrum communication mode; wherein, each of the control cards of the display terminals further includes: the wireless spread spectrum communication module is connected with the processor and is used for receiving the program playing instruction sent by the wireless spread spectrum communication base station and sending the program playing instruction to the processor; the processor acquires the program scheduling time length and the program to be played at a preset absolute time point, and specifically comprises the following steps: receiving the program playing instruction at the preset absolute time point; and acquiring the program scheduling time length and the program to be played according to the program playing instruction.
In one embodiment of the present invention, the master server is further configured to periodically issue the time correction instruction at the preset frequency via the wireless spread spectrum communication base station; the wireless spread spectrum communication module of each display terminal is further configured to periodically receive the time calibration instruction at the preset frequency via a wireless radio frequency communication manner and forward the time calibration instruction to the processor.
In one embodiment of the present invention, the control card of each of the display terminals further includes: and the GPS module is connected with the processor and is used for periodically sending an interrupt signal to the processor through a GPS signal at a preset frequency to serve as the time calibration instruction.
In a fourth aspect, a further embodiment of the present invention provides a playing system, including a memory and a processor connected to the memory, where the memory stores instructions executed by the processor, and the instructions cause the processor to perform operations to perform any one of the playing methods described above.
In a fifth aspect, a further embodiment of the present invention proposes a computer readable storage medium that is a non-volatile memory and stores computer readable instructions comprising instructions for performing any one of the above-described playback methods.
The technical characteristics of the invention can have one or more of the following beneficial effects: the synchronicity of the programs played by the display screens can be realized, namely, the program contents played by the display screens can form a complete picture of the performance effect, the performance effect is enhanced, the operation is simple, and the user experience is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a schematic structural diagram of a playing system according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of the display terminal 11 in the playing system shown in fig. 1;
fig. 3 is a schematic diagram of another structure of a playing system according to the first embodiment of the present invention;
fig. 4 is a schematic structural diagram of the display terminal 11 in the playing system shown in fig. 3;
fig. 5 is a schematic diagram of another structure of the display terminal 11 in the playing system shown in fig. 1;
fig. 6 is a system architecture diagram of a playing system according to a first embodiment of the present invention;
FIG. 7 is a schematic diagram of a plurality of media folders of a playback system according to a first embodiment of the present invention;
Fig. 8 is a flowchart illustrating steps of a playing method according to a second embodiment of the present invention;
fig. 9 is a schematic block diagram of a playing device according to a third embodiment of the present invention;
fig. 10 is a schematic structural diagram of a playing system according to a fourth embodiment of the present invention;
fig. 11 is a schematic structural view of a computer readable storage medium according to a fifth embodiment of the present invention.
[ reference numerals description ]
10: a playing system; 11: a display terminal; 111: a display screen body; 112: a control card; 1121: a programmable logic device; 1122: a processor; 1123: a wireless spread spectrum communication module; 1124: a GPS module; 12: a master control server; 13: a wireless spread spectrum communication base station;
S11-S14: a playing method step;
20: a playing device; 21: a time adjustment module; 22: an information acquisition module; 23: a time calculation module; 24: a program playing module;
30: a playing system; 31: a processor; 32: a memory;
40: computer readable storage media.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described below with reference to the accompanying drawings in combination with embodiments.
In order that those skilled in the art will better understand the technical solutions of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be further noted that, the term "and/or" herein is merely an association relationship describing the association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should be further noted that the division of the embodiments in the present invention is only for convenience of description, and should not be construed as a specific limitation, and features in each embodiment may be combined and mutually referenced without contradiction.
[ first embodiment ]
Referring to fig. 1, a first embodiment of the present invention provides a playback system. As shown in fig. 1, the playback system 10 includes, for example, a plurality of display terminals 11 that are controlled independently of each other, the plurality of display terminals 11 being movably dispersed at different positions. The present embodiment is not limited to a specific number of display terminals 11, and the number of display terminals 11 illustrated in fig. 1 is only for better understanding of the present embodiment.
As shown in fig. 2, each display terminal 11 includes, for example: a display screen 111 and a control card 112 connected to the display screen 111. The control card 112 includes, for example: a programmable logic device 1121 coupled to the display screen 111 and a processor 1122 coupled to the programmable logic device 1121. The processor 1122 of each of the plurality of display terminals 11 is, for example, configured to: acquiring reference time, and adjusting the absolute time and the reference time to be consistent; acquiring program scheduling time length and a program to be played at a preset absolute time point; calculating to obtain a play starting time point according to the preset absolute time point and the program scheduling time length; and starting to play the program to be played at the starting play time point.
Each display terminal 11 is, for example, a handheld screen, that is, a handheld display screen, which is different from the conventional fixed LED display screen, and the display terminal 11 can be held by a user and can be moved to change positions at will. The plurality of display terminals 11 may constitute one complete picture when a program is played, and each display terminal 11 is configured to display a part of the complete picture. The display screen 111 is, for example, an LED display screen, and its resolution is, for example, 96×96, which is a smaller resolution. The programmable logic device 1121 is, for example, a Field programmable gate array (Field-Programmable Gate Array, FPGA). The processor 1122 is, for example, a ARM (Advanced RISC Machines) processor, a single chip microcomputer (Microcontroller Unit, MCU) or the like. The reference time mentioned herein is a standard time for maintaining synchronization, and may be the same as the current actual time or may be the same as the current actual time, for example, the reference time is a Beijing standard time. The absolute time mentioned is the internal time of the display terminal itself.
Further, the processor 1122 may include: periodically receiving a time calibration instruction at a preset frequency; and acquiring the reference time according to the time calibration instruction. The preset frequencies mentioned are, for example, every minute, every 30 seconds or other frequencies.
Further, as shown in fig. 3, the playing system 10 further includes, for example: the main control server 12 is used for issuing program playing instructions. The wireless spread spectrum communication base station 13 is connected with the main control server 12 and is used for forwarding the program playing instruction in a wireless spread spectrum communication mode. As shown in fig. 4, the control card 112 of each display terminal 11 further includes: the wireless spread spectrum communication module 1123 is connected to the processor 1122, and is configured to receive the program playing instruction sent by the wireless spread spectrum communication base station 13, and send the program playing instruction to the processor 1122. The processor 1122 obtains the program scheduling duration and the program to be played at the preset absolute time point specifically includes: and receiving the program playing instruction at the preset absolute time point, and acquiring the program scheduling duration and the program to be played according to the program playing instruction.
The master server 12 is located, for example, in a host computer, such as a personal computer, a handheld device, a portable device, a tablet device, a multiprocessor system, a microprocessor-based system, an editable consumer electronic device, a network PC, a minicomputer, a mainframe computer, a distributed computing environment that includes any of the above systems or devices, and the like.
The wireless spread spectrum communication base station 13 is, for example, a Lora base station, which is also called a Lora gateway, where Lora is abbreviated as Long Range, is a Long-distance wireless transmission technology based on a spread spectrum technology, which is also one of many LPWAN communication technologies, and LPWAN is abbreviated as Low Power Wide Area Network (low power consumption wide area network). The master server 12 is connected to the wireless spread spectrum communication base station 13, for example, through a serial interface, and the master server 12 and the wireless spread spectrum communication base station 13 are connected, for example, through a USB-to-RS 485 connection line or a USB-to-RS 232 connection line.
The wireless spread spectrum communication module 1123 is, for example, a Lora module, where Lora is an abbreviation of Long Range, which is a Long-distance wireless transmission technology based on a spread spectrum technology, and is one of many LPWAN communication technologies, and LPWAN is an abbreviation of Low Power Wide Area Network (low power consumption wide area network). In other embodiments, the Lora module may be replaced with another wireless spread spectrum communication module with a wireless communication distance on the kilometer level.
Specifically, the mentioned program play instruction includes, for example, a program number to be played. The mentioned program to be played includes, for example, display data corresponding to the program to be played. The mentioned program to be played is, for example, video or picture material. The mentioned program schedule time period is, for example, the maximum time period consumed for rendering the program to be played is read by the plurality of display terminals 11. Because the time consumed by each display terminal 11 for scheduling media is different, that is, the time for reading the program content and rendering is different, the play starting time point is calculated by the preset absolute time point and the program scheduling time length to start playing the program to be played, the time difference of the scheduled media of the plurality of display terminals 11 can be solved, and the playing consistency of the plurality of display terminals is further ensured. Specifically, the obtaining the program scheduling duration specifically includes: sending a time length acquisition request to an upper computer, wherein the upper computer is used for controlling a plurality of display terminals 11; and receiving the program scheduling time length sent by the upper computer according to the time length acquisition request. The host computer mentioned here is, for example, the host computer where the main control server 12 is located, or a host computer different from the main control server 12. The mentioned program scheduling duration is obtained by issuing a maximum resolution image to the plurality of display terminals 11 via the upper computer to record the time when each display terminal 11 starts to call the maximum resolution image and the time when each display terminal 11 starts to play the maximum resolution image, calculating the scheduling time of each display terminal 11 according to the time when each display terminal 11 starts to call the maximum resolution image and the time when each display terminal 11 starts to play the maximum resolution image, and selecting the maximum value of the scheduling time corresponding to the plurality of display terminals 11.
Further, the main control server 12 issues other control commands in addition to the program playing command, and the wireless spread spectrum communication base station 13 forwards the other control commands in a wireless spread spectrum communication manner. The plurality of display terminals 11 complete the corresponding operations according to other control instructions. Among other control instructions mentioned include, for example: program update instructions, program pause instructions, program switch instructions, designated location play program instructions, screen control instructions, and system adjustment instructions. Examples of screen control instructions include: display control instructions, or parameter adjustment instructions. The system adjustment instructions mentioned include, for example: time update instructions, or upgrade update instructions. The program switching instructions mentioned include, for example: next program instruction, last program instruction, or specified program instruction. The mentioned display control instructions include, for example: a black screen instruction or an open screen instruction. The parameter adjustment instructions mentioned include, for example: brightness adjustment instructions or color temperature adjustment instructions. The upgrade update instructions mentioned include, for example: program upgrade instructions or information configuration instructions. The wireless spread spectrum communication base station 13 according to the present embodiment has a frequency hopping function in addition to a transmission instruction by a wireless spread spectrum communication method, that is, it is possible to change the frequency information of the plurality of display terminals 11.
Further, the master server 12 is further configured to periodically issue the time correction instruction at the preset frequency via the wireless spread spectrum communication base station 13, and the wireless spread spectrum communication module 1123 of each display terminal 11 is further configured to periodically receive the time correction instruction at the preset frequency via a wireless radio frequency communication manner and forward the time correction instruction to the processor 1122.
Further, as shown in fig. 5, the control card 112 of each display terminal 11 further includes, for example: the GPS module 1124 connected to the processor 1121 is configured to periodically send an interrupt signal to the processor as the time calibration command through a GPS signal at a preset frequency, where the interrupt signal may be understood as an interrupt request for causing the processor to suspend a program that is currently running normally and to transfer to execute the time calibration command when the processor is running normally.
In order to facilitate understanding of the present embodiment, a specific implementation of the playback system 10 provided in the present embodiment is described below with reference to fig. 6 and 7.
The setting scenario is as follows: at the show site, each performer holds one LED display screen, i.e., a handheld screen, as one display unit for the entire tiled large screen. The LED display screen mentioned is, for example, an LED display screen body comprising a control system and a connection control system, wherein the control system is built-in or built-out with a Lora module.
As shown in fig. 6, the playing system includes, for example, a main control server, a Lora base station, a Lora module, a control system and an LED display screen body. Wherein fig. 6 only illustrates a connection relationship between one LED display screen and a main control server, and in a practical application scenario, a plurality of LED display screens, for example, hundreds of LED display screens, are involved.
The control system and the Lora module form the control card, the control card and the LED display screen body form the LED display screen, and the LED display screen corresponds to the display terminal, wherein the Lora module can be externally connected with an ARM processor in the control system, namely, the Lora module and the control system are in a split structure; or the Lora module and the control system are arranged on the same circuit board, namely, are integrated with the control system.
The display of the LED display screens forms a complete picture by solidifying the display content in advance in the control card and synchronously playing. The rules for making program materials in advance are as follows:
firstly, the whole material, namely the material required by the display of the complete picture by a plurality of LED display screens, is manufactured, and then the complete picture material is cut according to the quantity of the LED display screen bodies, for example: the size of the LED display screen is, for example, 96×96, the complete picture material is cut according to 96×96 pixels corresponding to each LED display screen body to obtain a plurality of materials, i.e., media, respectively corresponding to the LED display screens, then each media is named, for example, according to the format of address code_video playing serial number.mov, for example, 0201_01.mov, the previous digit indicates the address code of the LED display screen corresponding to the media, the address code is the position code, i.e., row and column two-dimensional coordinates, of the LED display screen in the complete picture displayed by splicing the LED display screens, or the serial number, i.e., one-dimensional information code, of the LED display screen in the LED display screens, and the next 2-digit indicates the media playing serial number.
Then, as shown in fig. 7, a media folder is established according to the address code of each LED display screen, for example, 2 rows and 1 columns are 0201, for example, address codes of 9999 LED display screen bodies are supported, and the media corresponding to each LED display screen is placed in the corresponding media folder. The plurality of media folders corresponding to the plurality of LED display screens are stored in a media server and/or a usb disk, for example. Each media folder includes, for example, media and an md5.json file, where each media folder does not limit the number of media, and the md5.json file stores media information corresponding to the media, including a media name, a media size, and a media feature code, i.e., an MD5 code, where the MD5 code is a unique identifier of the media, so that repeated downloading of the media can be prevented. The size of each medium is the same as the resolution of the corresponding LED display screen, so that flow waste can be prevented, and the continuous power-off transmission function can be realized by the size of the medium.
When the LED display screen needs to update programs, the control card can realize various program updating modes.
The first program updating mode is cable network updating, namely an ARM processor in the control system is connected with an RJ45 network port, and the RJ45 network port is connected with a media server through a network cable. When the ARM processor in the control system is connected to the network through a wired network, media in the corresponding media folder can be automatically downloaded from the media server according to the local address code, because the naming rules of the media folder are agreed in advance, and referring to the foregoing, the control cards of different LED display screens download media in the media folder corresponding to the local address code, and after the program is updated, the control cards are provided with indicator lights, for example, which flash to indicate that the program update is successful.
The second program updating mode is 4G network wireless updating, namely ARM processor in control system connects 4G network module, 4G network module connects to media server through 4G base station. For example, the Unicom lays out a dedicated 4G base station on the practice site, the Unicom provides a 4G module of mini PCIE interface, the 4G module is connected with ARM processor, and can ensure to connect to the 4G base station when there is a 4G base station. When the ARM processor in the control system is connected to the 4G network, media in a corresponding media folder can be downloaded from the media server automatically according to the local address code, and after the program is updated, an indicator lamp arranged on the control card flashes, and the LED display screen can directly play the first media to indicate that the program is updated successfully.
Before program update, the LED display screen needs to be connected to a media server, and the media server allocates an IP address of a public network through an operator network, or forms a private network with a control system through a private network. The control system needs to connect to the media server by configuring APN information. Configuration of APN information is achieved, for example, by: configuring each display screen through a USB flash disk; or if the control system is connected to the state monitoring server by default, the connected LED display screens can be configured in batches through the state monitoring service.
The media folder is for example stored under a certain directory of the download service of the media server. When the control system receives a program update instruction transmitted by the main control server through the Lora base station and the Lora module, the control system of the display screen downloads the corresponding media according to the local address code, wherein the control system is connected to the media server through a file downloading protocol such as http or ftp.
For the performance scene which may involve hundreds to thousands of LED display screens, in order to conveniently monitor the downloading progress of each LED display screen and control the downloading process, a state monitoring server can be arranged, and the control card is connected with the state monitoring server through an MQTT/TCP protocol, wherein the MQTT protocol can realize two-way communication, and the resource consumption of the server in the link establishment process is very small, so that the method is very suitable for the application of the Internet of things. The state monitoring server can be realized through a BS architecture or a CS architecture, when the configuration parameters of the control system are correct, the state monitoring server is automatically connected with the state monitoring server, then the SN number and the address code of the control system are uploaded, the state monitoring list is built after the state monitoring server receives the information, the information such as the online condition, the downloading completion condition and the playing serial number of the current playing media of the LED display screen is monitored, and in addition, the switch screen can be controlled in batches through the state monitoring server, the brightness is adjusted and the like. The status monitoring server may send program update commands to the LED display screen in batches for media downloads from the media server.
In addition, program updating can be performed through the USB flash disk, namely an ARM processor in the control system is connected with a USB interface, and the USB interface is connected to the USB flash disk. All media folders are stored in the U disk, after the ARM processor detects that the U disk is inserted, media in the corresponding media folders are automatically downloaded by the U disk according to the local address codes, after programs are updated, the indicator lamps arranged on the control card flash, and the LED display screen can directly play the first media to indicate that the programs are updated successfully.
In practical applications, the playing contents of multiple LED display screens are spliced to display a complete picture, so that synchronicity of playing programs of multiple display screens is required.
Firstly, adjusting the internal time of each LED display screen by periodically receiving a time calibration instruction, keeping the consistency of the internal time of each LED display screen, namely adjusting the absolute time and the reference time to be consistent, then reading the content of a program to be played after the starting playing time of the program reaches the current internal time, namely a preset absolute time point, calculating the starting playing time point based on the preset absolute time point and the program scheduling duration, and then starting playing the program to be played based on the starting playing time point, thereby realizing the consistency of playing.
Among them, there are two ways of time-based synchronization: the first is based on GPS time synchronization, which can be applied to outdoor environment, the ARM processor in the control system is connected with a GPS module, the GPS module periodically issues an interrupt signal as a time calibration instruction, for example, issues a time calibration instruction every second, and the control system adjusts the internal time, namely the absolute time, based on the time calibration instruction so as to realize the consistency of the internal time of each LED display screen. It should be noted that, the GPS module needs to select a module with high accuracy of time consistency, and for video, 33ms is a frame, so that in order to achieve synchronization that is not perceived by naked eyes, the time consistency deviation between each display screen does not exceed a frame time.
The second type is based on the time synchronization of the Lora, ARM processor in the control system is connected with the Lora module, the Lora module is connected with the Lora base station, the Lora base station is connected with the master control server, the master control server periodically issues time calibration instructions to be sent out in a wireless spread spectrum communication mode through the Lora base station, the Lora module receives the time calibration instructions and then sends the time calibration instructions to the control system, and the control system adjusts the internal time based on the time calibration instructions so as to achieve the consistency of the internal time of each LED display screen.
However, because the time consumption of the scheduled media of the control systems of each LED display screen is different, that is, each control system has a certain time difference when scheduling the media, the time consumed by the respective scheduled media of the control systems of the LED display screens is calculated in advance, and the longest time consumed, that is, the program scheduling time length, is calculated, and the control systems of the LED display screens are subjected to uniform time delay based on the program scheduling time length, specifically, the program scheduling time length can be solidified in the control system of each display screen, or a time length acquisition request can be sent to an upper computer to receive the program scheduling time length issued by the upper computer according to the time length acquisition request. The control system of each LED display screen reads the program to be played and the program scheduling duration after the starting playing time of the program, namely a preset absolute time point, is reached, and then the starting playing time point obtained by summing the preset absolute time point and the program scheduling duration is used for starting playing of the program content to be played at the starting playing time point.
On the other hand, the program playing can be controlled by receiving the program playing instruction at the preset absolute time point, specifically, after the control system adjusts the internal time based on the time calibration instruction so as to achieve the consistency of the internal time of each LED display screen, the master control server issues the program playing instruction to the plurality of LED display screens through the Lora base station, so that the plurality of LED display screens are controlled to synchronously start playing the program content, and because the control system of each LED display screen has no information interaction with each other, the plurality of LED display screens can synchronously start playing the program content by issuing the program playing instruction to the plurality of LED display screens, and the consistency of starting playing is achieved.
After receiving the program playing instruction, the multiple LED display screens will not directly play the program content, because the control system of each LED display screen has different time consumption of the scheduled media, that is, each control system has a certain time difference when scheduling the media, so the time consumed by the control system of each LED display screen to schedule the media is calculated in advance, the longest time consumed, that is, the program scheduling time length, is calculated, the control system of the multiple LED display screens is uniformly delayed based on the program scheduling time length, specifically, the program scheduling time length is solidified in the control system of each display screen, after responding to the program playing instruction, the control system of each LED display screen starts playing the media content to be played after the program scheduling time length, that is, the control system can be understood to sum the preset absolute time point and the program scheduling time length to obtain the starting playing time point, and then starts playing the program to be played at the starting playing time point.
In the playing process, because the internal time of the control system of each LED display screen is already adjusted, the synchronicity of the playing of the program can be naturally maintained by the audio and video synchronization technology based on the adjusted time, wherein the audio and video synchronization technology is the existing program playing synchronization technology and will not be described in detail herein. In this way, the synchronism of the program playing process is realized.
In summary, the playing system disclosed in the first embodiment of the present invention can realize the synchronicity of the playing programs of the plurality of display terminals, that is, the content of the programs played by the plurality of display terminals can form a complete-picture performance effect, thereby enhancing the performance effect, simplifying the operation and improving the user experience.
[ second embodiment ]
Referring to fig. 8, a second embodiment of the present invention discloses a playback method applied to a display system including a plurality of display terminals controlled independently of each other. As shown in fig. 8, the playing method includes, for example, steps S11 to S14.
Step S11: acquiring reference time, and adjusting the absolute time and the reference time to be consistent;
step S12: acquiring program scheduling time length and a program to be played at a preset absolute time point;
step S13: calculating a play starting time point according to the preset absolute time point and the program scheduling time length;
step S14: and starting to play the program to be played at the starting play time point.
Specifically, the acquiring the reference time in step S11 includes, for example: periodically receiving a time calibration instruction at a preset frequency; and acquiring the reference time according to the time calibration instruction. The method for periodically receiving the time calibration instruction at the preset frequency specifically comprises the following steps: and periodically receiving the time calibration instruction by the preset frequency through a wireless radio frequency communication mode. Alternatively, the method for periodically receiving the time calibration command at the preset frequency specifically includes: and periodically receiving an interrupt signal through a GPS signal at the preset frequency to serve as the time calibration instruction.
Step S12 includes, for example: receiving a program playing instruction at the preset absolute time point; and acquiring the program scheduling time length and the program to be played according to the program playing instruction. The program playing instruction mentioned includes, for example, a program number to be played, for example, from a master server. The master server mentioned is for example located in a host computer, for example a personal computer, a hand-held device, a portable device, a tablet device, a multiprocessor system, a microprocessor-based system, an editable consumer electronics device, a network PC, a minicomputer, a mainframe computer, or a distributed computing environment comprising any of the above systems or devices, and the like. The master control server is mainly used for issuing control instructions to a plurality of display screens through a wireless spread spectrum communication base station to control states of the plurality of display screens, wherein the mentioned wireless spread spectrum communication base station is, for example, a Lora base station, which is also called a Lora gateway, and the Lora is abbreviated as Long Range, which is a Long-distance wireless transmission technology based on a spread spectrum technology, is also one of many LPWAN communication technologies, and the LPWAN is abbreviated as Low Power Wide Area Network (low power consumption wide area network). The control instructions mentioned include, in addition to the program play instructions, for example: program update instructions, program pause instructions, program switch instructions, designated location play program instructions, screen control instructions, and system adjustment instructions. Examples of screen control instructions include: display control instructions or parameter adjustment instructions. The system adjustment instructions mentioned include, for example: time update instructions or upgrade update instructions. The program switching instructions mentioned include, for example: next program instruction, last program instruction, or specified program instruction. The mentioned display control instructions include, for example: a black screen instruction or an open screen instruction. The parameter adjustment instructions mentioned include, for example: brightness adjustment instructions or color temperature adjustment instructions. The upgrade update instructions mentioned include, for example: program upgrade instructions or information configuration instructions.
In step S12, the mentioned program scheduling duration is, for example, the maximum duration consumed by a plurality of display terminals in the display system to read and render the program to be played. The method for acquiring the program scheduling time length specifically comprises the following steps: sending a time length acquisition request to an upper computer, wherein the upper computer is used for controlling the plurality of display terminals; and receiving the program scheduling time length sent by the upper computer according to the time length acquisition request. The program scheduling duration is obtained by issuing a maximum resolution image to a plurality of display terminals through an upper computer to record the time when each display terminal starts to call the maximum resolution image and the time when each display terminal starts to play the maximum resolution image, calculating the scheduling time of each display terminal according to the time when each display terminal starts to call the maximum resolution image and the time when each display terminal starts to play the maximum resolution image, and selecting the maximum value of the scheduling time corresponding to the plurality of display terminals. The mentioned program to be played is display data corresponding to the program to be played, and the program to be played is, for example, a picture, a video and other materials. In step S12, the program to be played is obtained according to the program playing instruction, for example, as follows: determining a program sequence number to be played according to the program playing instruction; reading the corresponding program to be played according to the program serial number to be played can be understood as that the display terminal locally stores a plurality of programs, namely a plurality of media, and can play specified program contents according to a program playing instruction.
The step S13 of calculating a play start time point according to the preset absolute time point and the program scheduling duration specifically includes: and summing the preset absolute time point and the program scheduling time length to obtain the play starting time point.
Further, after step S14, the playing method according to this embodiment further includes playing the program to be played through an audio/video synchronization technology based on the absolute time. The audio and video synchronization technology is an existing display screen playing synchronization technology, and is not described herein, because the internal time of each display screen is basically the same, so that the rate of playing the program content by each display screen through the audio and video synchronization technology is the same, and the playing synchronization of each display screen can be maintained based on the adjusted time for playing the program content.
It should be noted that, the playing method disclosed in the second embodiment of the present invention is implemented in, for example, the display terminal of the playing system disclosed in the foregoing first embodiment, and specifically implemented in the processor inside the display terminal, and the relevant description about the playing method may refer to the relevant description of the first embodiment, which is not repeated herein for brevity.
In summary, the playing method disclosed in the second embodiment of the present invention can realize the synchronicity of the playing programs of the multiple display terminals, that is, the content of the programs played by the multiple display terminals can form a complete-picture performance effect, thereby enhancing the performance effect, simplifying the operation and improving the user experience.
[ third embodiment ]
Referring to fig. 9, a third embodiment of the present invention discloses a playing device. As shown in fig. 9, the playback apparatus 20 is applied to a display system including a plurality of display terminals controlled independently of each other, and includes, for example: a time adjustment module 21, an information acquisition module 22, a time calculation module 23 and a program playing module 24.
The time adjustment module 21 is configured to obtain a reference time, and adjust the absolute time and the reference time to be consistent. The information obtaining module 22 is configured to obtain a program scheduling duration and a program to be played at a preset absolute time point. The time calculating module 23 is configured to calculate a play start time point according to the preset absolute time point and the program scheduling duration. The program playing module 24 is configured to start playing the program to be played at the starting playing time point.
Further, the information obtaining module 22 is specifically configured to receive a program playing instruction at the preset absolute time point; and acquiring the program scheduling time length and the program to be played according to the program playing instruction.
Further, the time adjustment module 21 obtains the reference time specifically includes: periodically receiving a time calibration instruction at a preset frequency; and acquiring the reference time according to the time calibration instruction.
Further, the foregoing method for periodically receiving the time alignment command at the preset frequency specifically includes: periodically receiving an interrupt signal as the time calibration instruction through a GPS signal at the preset frequency; or, the periodically receiving a time calibration command at a preset frequency specifically includes: and periodically receiving the time calibration instruction by the preset frequency through a wireless radio frequency communication mode.
The mentioned program scheduling time length is the maximum time length consumed by the display terminals in the display system for reading and rendering the program to be played. The information obtaining module 22 obtains the program scheduling duration specifically includes: sending a time length acquisition request to an upper computer, wherein the upper computer is used for controlling the plurality of display terminals; and receiving the program scheduling time length sent by the upper computer according to the time length acquisition request. The program scheduling duration is obtained by issuing a maximum resolution image to the plurality of display terminals through the upper computer so as to record the time when each display terminal starts to call the maximum resolution image and the time when each display terminal starts to play the maximum resolution image, calculating the scheduling time of each display terminal according to the time when each display terminal starts to call the maximum resolution image and the time when each display terminal starts to play the maximum resolution image, and selecting the maximum value of the scheduling time corresponding to the plurality of display terminals.
Further, the information obtaining module 22 obtains the program to be played according to the program playing instruction specifically includes: determining a program sequence number to be played according to the program playing instruction; and reading the corresponding program to be played according to the program serial number to be played.
Further, the time calculating module 23 calculates a play start time point according to the preset absolute time point and the program scheduling duration, which specifically includes: and summing the preset absolute time point and the program scheduling time length to obtain the play starting time point.
Further, the playing device 20 further includes, for example: and the play adjustment module is used for playing the program to be played through an audio and video synchronization technology based on the absolute time.
The playing method implemented by the playing device 20 according to the third embodiment of the present invention is as described in the foregoing second embodiment, and thus will not be described in detail herein. Optionally, each module in the third embodiment and the other operations or functions described above are respectively for implementing the method in the second embodiment of the present invention, and the beneficial effects are the same as those in the second embodiment, and are not described herein for brevity.
[ fourth embodiment ]
Referring to fig. 10, a fourth embodiment of the present invention provides a playback system. As shown in fig. 10, the playback system 30 includes, for example, a processor 31 and a memory 32 connected to the processor 31. The memory 32 stores instructions executed by the processor 31, and the instructions cause the processor 31 to perform operations for performing the playing method according to the second embodiment.
It should be noted that, the playing system 30 according to the present embodiment has instructions that cause the processor 31 to perform operations to perform the playing method according to the foregoing second embodiment, so that a detailed description thereof will not be provided herein. Optionally, in order to implement the method in the second embodiment of the present invention, each processor and each memory in the present embodiment of the present invention respectively, the technical effects of the playing system 60 disclosed in the fourth embodiment of the present invention are the same as those of the playing method in the second embodiment, and are not described herein again.
[ fifth embodiment ]
Referring to fig. 11, a fifth embodiment of the present invention proposes a computer-readable storage medium. As shown in fig. 11, the computer-readable storage medium 40 stores computer-readable instructions including instructions for performing the playback method as described in the second embodiment. And will not be repeated here. The computer-readable storage medium 40 is, for example, a nonvolatile memory, and includes, for example: magnetic media (e.g., hard disk, floppy disk, and magnetic strips), optical media (e.g., CDROM disks and DVDs), magneto-optical media (e.g., optical disks), and hardware devices that are specially constructed for storing and performing computer-executable instructions (e.g., read-only memory (ROM), random Access Memory (RAM), flash memory, etc.). The computer-readable storage medium 40 may execute computer-readable instructions by one or more processors or processing devices.
In addition, the technical effects of the computer readable storage medium 40 provided in the present embodiment are the same as those of the playing method in the second embodiment, and will not be described herein.
From the above description of embodiments, it will be apparent to those skilled in the art that the present invention may be implemented in software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part in the form of a software product, which may be stored in a storage medium such as ROM/RAM, an optical disk, a magnetic disk, etc., including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the method of the various embodiments or portions of the embodiments of the present invention.
It will be apparent to those skilled in the art that the modules or method steps of the invention described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, or they may alternatively be implemented in program code executable by computing devices, such that they may be stored in a memory device for execution by the computing devices, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps within them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (17)
1. A playback method applied to a display system including a plurality of display terminals controlled independently of each other, comprising:
acquiring reference time, and adjusting the absolute time and the reference time to be consistent;
acquiring program scheduling time length and a program to be played at a preset absolute time point;
calculating a play starting time point according to the preset absolute time point and the program scheduling time length;
starting to play the program to be played at the starting play time point;
the program scheduling duration is obtained by issuing a maximum resolution image to the plurality of display terminals through an upper computer so as to record the time when each display terminal starts to call the maximum resolution image and the time when each display terminal starts to play the maximum resolution image, calculating the scheduling time of each display terminal according to the time when each display terminal starts to call the maximum resolution image and the time when each display terminal starts to play the maximum resolution image, and selecting the maximum value of the scheduling time corresponding to the plurality of display terminals.
2. The method of playing according to claim 1, wherein the obtaining the program scheduling duration and the program to be played at the preset absolute time point includes:
receiving a program playing instruction at the preset absolute time point;
and acquiring the program scheduling time length and the program to be played according to the program playing instruction.
3. The playing method according to claim 1, wherein the obtaining the reference time specifically includes:
periodically receiving a time calibration instruction at a preset frequency;
and acquiring the reference time according to the time calibration instruction.
4. The playback method as defined in claim 3, wherein the periodically receiving the time alignment command at the predetermined frequency comprises:
and periodically receiving an interrupt signal through a GPS signal at the preset frequency to serve as the time calibration instruction.
5. The playback method as defined in claim 3, wherein the periodically receiving the time alignment command at the predetermined frequency comprises:
and periodically receiving the time calibration instruction by the preset frequency through a wireless radio frequency communication mode.
6. The playback method as recited in claim 1, wherein the program schedule time period is a maximum time period consumed by the plurality of display terminals in the display system to read and render the program to be played; the step of obtaining the program scheduling duration specifically comprises the following steps:
Sending a time length acquisition request to an upper computer, wherein the upper computer is used for controlling the plurality of display terminals;
and receiving the program scheduling time length sent by the upper computer according to the time length acquisition request.
7. The playing method according to claim 2, wherein the obtaining the program to be played according to the program playing instruction specifically includes:
determining a program sequence number to be played according to the program playing instruction;
and reading the corresponding program to be played according to the program serial number to be played.
8. The method of claim 1, wherein the calculating the play start time point according to the preset absolute time point and the program scheduling duration specifically includes:
and summing the preset absolute time point and the program scheduling time length to obtain the play starting time point.
9. The playback method as recited in claim 1, further comprising, after starting playback of the program to be played back at the start playback time point:
and playing the program to be played through an audio and video synchronization technology based on the absolute time.
10. A playback apparatus applied to a display system including a plurality of display terminals controlled independently of each other, the playback apparatus comprising:
The time adjustment module is used for acquiring reference time and adjusting the absolute time and the reference time to be consistent;
the information acquisition module is used for acquiring the program scheduling time length and the program to be played at a preset absolute time point;
the time calculation module is used for calculating and obtaining a play starting time point according to the preset absolute time point and the program scheduling duration;
the program playing module is used for starting to play the program to be played at the starting playing time point;
the program scheduling duration is obtained by issuing a maximum resolution image to the plurality of display terminals through an upper computer so as to record the time when each display terminal starts to call the maximum resolution image and the time when each display terminal starts to play the maximum resolution image, calculating the scheduling time of each display terminal according to the time when each display terminal starts to call the maximum resolution image and the time when each display terminal starts to play the maximum resolution image, and selecting the maximum value of the scheduling time corresponding to the plurality of display terminals.
11. A playback system, comprising: a plurality of display terminals independently controlled from each other, each of the display terminals comprising:
A display screen body;
the control card is connected with the display screen body, and comprises:
the programmable logic device is connected with the display screen body;
and the processor is connected with the programmable logic device and is used for:
acquiring reference time, and adjusting the absolute time and the reference time to be consistent;
acquiring program scheduling time length and a program to be played at a preset absolute time point;
calculating to obtain a play starting time point according to the preset absolute time point and the program scheduling time length;
starting to play the program to be played at the starting play time point;
the program scheduling duration is obtained by issuing a maximum resolution image to the plurality of display terminals through an upper computer so as to record the time when each display terminal starts to call the maximum resolution image and the time when each display terminal starts to play the maximum resolution image, calculating the scheduling time of each display terminal according to the time when each display terminal starts to call the maximum resolution image and the time when each display terminal starts to play the maximum resolution image, and selecting the maximum value of the scheduling time corresponding to the plurality of display terminals.
12. The playback system of claim 11, wherein the processor obtains the reference time, comprising:
Periodically receiving a time calibration instruction at a preset frequency;
and acquiring the reference time according to the time calibration instruction.
13. The playback system of claim 12, further comprising:
the main control server is used for issuing a program playing instruction;
the wireless spread spectrum communication base station is connected with the main control server and is used for forwarding the program playing instruction in a wireless spread spectrum communication mode;
wherein, each of the control cards of the display terminals further includes:
the wireless spread spectrum communication module is connected with the processor and is used for receiving the program playing instruction sent by the wireless spread spectrum communication base station and sending the program playing instruction to the processor;
the processor acquires the program scheduling time length and the program to be played at a preset absolute time point, and specifically comprises the following steps: receiving the program playing instruction at the preset absolute time point; and acquiring the program scheduling time length and the program to be played according to the program playing instruction.
14. The playback system of claim 13, wherein the master server is further configured to periodically issue the time correction instruction at the preset frequency via the wireless spread spectrum communication base station;
The wireless spread spectrum communication module of each display terminal is further configured to periodically receive the time calibration instruction at the preset frequency via a wireless radio frequency communication manner and forward the time calibration instruction to the processor.
15. The playback system of claim 13, wherein the control card of each of the display terminals further comprises:
and the GPS module is connected with the processor and is used for periodically sending an interrupt signal to the processor through a GPS signal at a preset frequency to serve as the time calibration instruction.
16. A playback system, comprising: a processor and a memory coupled to the processor, wherein the memory stores instructions for execution by the processor and the instructions cause the processor to perform operations to perform the playback method of any one of claims 1 to 9.
17. A computer readable storage medium, characterized in that the computer storage medium is a non-volatile memory and stores computer readable instructions comprising instructions for performing the playback method of any one of claims 1 to 9.
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| CN113596577B (en) * | 2021-07-22 | 2023-03-21 | 上海领路人科技股份有限公司 | Visual cutting and issuing method, device, medium and terminal of linkage video |
| CN114630164B (en) * | 2022-03-14 | 2024-01-16 | 卡莱特云科技股份有限公司 | Program playing method, device and system based on space expansion playing box |
| CN115397002B (en) * | 2022-06-28 | 2024-01-12 | 深圳市裕铭信息技术有限公司 | Time synchronization control method, LED control system and readable storage medium thereof |
| CN116647753B (en) * | 2023-07-27 | 2023-10-10 | 新唐信通(浙江)科技有限公司 | Wireless communication control device and control method |
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| Media/playback device synchronization for the 4D broadcasting service system;Jae-Kwan Yun等;2012 IEEE International Conference on Consumer Electronics (ICCE);全文 * |
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| CN113424551A (en) | 2021-09-21 |
| WO2021134396A1 (en) | 2021-07-08 |
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