CN114245188A - Automatic cascading method of playing box terminal and LED display screen cascading playing method - Google Patents
Automatic cascading method of playing box terminal and LED display screen cascading playing method Download PDFInfo
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- CN114245188A CN114245188A CN202111639971.7A CN202111639971A CN114245188A CN 114245188 A CN114245188 A CN 114245188A CN 202111639971 A CN202111639971 A CN 202111639971A CN 114245188 A CN114245188 A CN 114245188A
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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
Abstract
The invention provides an automatic cascading method of a play box terminal and an LED display screen cascading play method, which are applied to a play system, wherein the automatic cascading method comprises the following steps: presetting the cascade number of the play control terminal as 0, and taking the play control terminal as a reference terminal; judging whether the target playing box terminal is a specific device, if so, adding 1 to the cascade number of the reference terminal to obtain a cascade number i of the target playing box terminal, and recording the target playing box terminal as an ith cascade playing box; changing the reference terminal into the ith cascade playing box, and repeatedly executing the judging step; otherwise, the automatic cascade is ended. The cascade playing method comprises the following steps: and identifying the cascaded playing boxes and determining the cascade numbers of the cascaded playing boxes by the automatic cascading method, and executing the network port offset step by each cascaded playing box. The method provided by the invention can realize the automatic cascade of the playing box terminal, improve the cascade efficiency of the playing box and further realize the cascade playing of the LED display screen.
Description
Technical Field
The invention relates to the technical field of display screen cascade playing, in particular to an automatic cascade method of a playing box terminal and an LED display screen cascade playing method.
Background
The playing boxes can be used for transmitting multimedia data to an LED display screen for playing, because the number of pixels carried by the playing boxes is limited, for a large-resolution LED display screen (cascade screen), multiple playing boxes need to be used for cascading at this time, that is, each playing box carries a smaller-resolution LED display screen, so as to display corresponding multimedia data in the large-resolution LED display screen composed of multiple smaller-resolution LED display screens, but at present, in the process of cascading playing boxes, there is a problem (that is, how to automatically cascade) how to determine that a first playing box terminal is a cascaded first playing box terminal and how to determine that a device (playing box terminal) behind the cascaded first playing box terminal is a cascaded device (playing box terminal), which affects the efficiency of cascading playing box terminals, further, the efficiency of displaying multimedia data in the cascade screen is affected, and therefore, a new solution to solve the above problem needs to be found by those skilled in the art.
Disclosure of Invention
Aiming at the problems, the invention provides an automatic cascading method of a playing box terminal and an LED display screen cascading playing method, which realize the automatic cascading of the playing box terminal, improve the cascading efficiency of the playing box terminal and further realize the LED display screen cascading playing.
The invention provides an automatic cascading method of playing box terminals, which is applied to a playing system, wherein the playing system comprises a playing control terminal and a plurality of playing box terminals, and the automatic cascading method comprises the following steps:
step S101: presetting the cascade number of the play control terminal as 0, and taking the play control terminal as a reference terminal;
step S102: judging whether the target playing box terminal is a specific device or not through the reference terminal, if so, executing the steps S103-S104, otherwise, executing the step S105; wherein, the target playing box terminal is: the next-stage play box terminal is connected with the reference terminal;
step S103: adding 1 to the cascade number of the reference terminal through the target playing box terminal to obtain a cascade number i of the target playing box terminal, and judging the target playing box terminal as a cascade playing box which is marked as the ith cascade playing box;
step S104: changing the reference terminal into the ith cascade playing box, and continuing to execute the step S102;
step S105: if the reference terminal is the play control terminal or the No. 1 cascaded play box, judging that the play system does not have the cascaded play box, ending the automatic cascade, and if the reference terminal is the No. i cascaded play box and i is not equal to 1, taking the reference terminal as the last cascaded play box, and ending the automatic cascade.
Further, in step S105, if the reference terminal is the 1 st cascade play box, before the automatic cascade is ended, step S105 further includes:
and setting the cascade number of the reference terminal to 0 through the reference terminal.
Further, before step S102, the method for automatic cascading further includes:
step S106: and judging whether the reference terminal reads the EDID of the target play box terminal or not through the reference terminal, if so, executing step S102, and otherwise, executing step S105.
Further, the HDMI transmitting terminal of the reference terminal is connected to the HDMI receiving terminal of the target play box terminal, and determining whether the target play box terminal is a specific device includes:
and reading the EDID stored in the HDMI receiving end of the target playing box terminal through the reference terminal, and judging whether the target playing box terminal is a specific device or not according to the EDID.
Further, the automatic cascading method further comprises:
the method comprises the steps of modifying an infoframe reserved field or an infoframe field in HDMI transmitting ends of a play control terminal and a plurality of play box terminals into a cascade number data storage field in advance so as to store cascade numbers.
Further, after the cascade number of the reference terminal is incremented by 1 by the target play box terminal to obtain the cascade number i of the target play box terminal, step S103 further includes:
and storing the cascade number i of the target playing box terminal into a cascade number data storage field in the HDMI sending end of the target playing box terminal.
Further, the method modifies the infoframe reserved field or the infoframe field in the HDMI transmitting end of the play control terminal and the HDMI transmitting ends of the plurality of play box terminals into the concatenated number data storage field in advance as follows:
and modifying the infoframe reserved field or the infoframe field in the HDMI transmitting ends of the play control terminal and the plurality of play box terminals into a cascade number data storage field in advance by adopting an on-chip programming modification mode.
Further, before determining whether the target play box terminal is the specific device through the reference terminal, step S102 further includes:
and transmitting the video source data to the HDMI receiving end of the target playing box terminal through the HDMI transmitting end of the reference terminal.
The invention also provides a cascaded playing method of the LED display screen, which is applied to a playing system, wherein the playing system comprises a playing control terminal and a plurality of playing box terminals, and the cascaded playing method comprises the following steps:
according to the automatic cascading method of the playing box terminals, the cascading playing box is identified from the playing box terminals of the playing system, and the cascading number of the cascading playing box is determined;
the method comprises the following steps of executing a network interface offset step through each cascaded playing box to realize cascaded playing of the LED display screen, wherein for one cascaded playing box, the network interface offset step comprises the following steps:
determining the network port area of the cascaded playing boxes according to the number of the cascaded playing boxes, splitting video source data according to the network port area of the cascaded playing boxes, and splitting the video source data into a plurality of sub-video data;
determining the sub-video data corresponding to the cascade playing box according to the cascade number of the cascade playing box;
and sending the sub-video data corresponding to the cascade playing box to an LED display screen connected with the cascade playing box.
Further, the cascade playing method further comprises:
if one or more cascaded playing boxes are disconnected with the LED display screen connected with the cascaded playing boxes, the step of residual network interface deviation is executed again through the residual cascaded playing boxes which are not disconnected with the LED display screen, so that cascaded playing of the LED display screen is realized, and for one residual cascaded playing box, the step of residual network interface deviation comprises the following steps:
determining the network port area of the residual cascade playing boxes according to the number of the residual cascade playing boxes, splitting video source data according to the network port area of the residual cascade playing boxes, and splitting the video source data into a plurality of sub-video data;
determining sub video data corresponding to the residual cascade playing boxes according to the cascade numbers of the residual cascade playing boxes;
and sending the sub-video data corresponding to the residual cascade playing boxes to the LED display screen connected with the residual cascade playing boxes through the residual cascade playing boxes.
The automatic cascading method of the playing box terminal and the LED display screen cascading playing method provided by the invention at least have the following beneficial effects:
the automatic cascade method of the playing box terminal provided by the invention can automatically identify and judge the cascaded first playing box terminal (the 1 st cascaded playing box) in the playing system through the steps, automatically identify other cascaded playing boxes behind the cascaded first playing box terminal (the 1 st cascaded playing box), and determine the cascade number of the playing box terminal after identifying a certain playing box terminal as the cascaded playing box, so as to realize the automatic cascade of the playing box terminal through the cascade number and improve the cascade efficiency of the playing box terminal. Furthermore, after the automatic cascade method of the playing box terminal is used for automatically cascading the playing box terminals in the playing system, each cascade playing box numbers each cascade playing box according to the number of the cascade playing boxes, and the network port deviation is carried out, so that the cascade playing of the LED display screen is automatically realized, and the cascade playing efficiency of the LED display screen is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a playback system according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a first step of an automatic cascading method for a Play Box terminal according to an embodiment of the present invention;
fig. 3 is a schematic cascade diagram of a play control terminal and a cascade play box according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a second step of an automatic cascading method for a Play Box terminal according to another embodiment of the present invention;
fig. 5 is a flowchart illustrating a third step of an automatic cascading method of a play box terminal according to another embodiment of the present invention;
FIG. 6 is a flowchart illustrating a fourth step of an automatic cascading method for a Play Box terminal according to another embodiment of the present invention;
FIG. 7 is a flowchart illustrating a fifth step of an automatic cascading method of a Play Box terminal according to another embodiment of the present invention;
FIG. 8 is a flowchart illustrating the steps of a cascaded playing method for LED display screens according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a cascade playing effect of an LED display screen according to the present invention;
FIG. 10 is a flow chart of a portal offset procedure in an embodiment of the present invention;
fig. 11 is a flowchart of the remaining port shifting step in an embodiment of the present invention.
1-play control terminal, 2-play box terminal.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In an embodiment of the present invention, an automatic cascading method for a play box terminal is provided, which is applied to a play system.
As shown in fig. 1, the playback system includes a playback control terminal 1 and a plurality of playback box terminals 2, where the playback control terminal 1 and the plurality of playback box terminals 2 are connected in sequence.
Specifically, the playing control terminal and the playing box terminal, and the playing box terminal are connected by an HDMI (High Definition Multimedia Interface Cable), so as to implement data transmission.
As shown in fig. 1, the auto-cascade method includes the steps of:
step S101: the cascade number of the playing control terminal is preset to be 0, and the playing control terminal is used as a reference terminal.
Specifically, before this step, the predefined infoframe field or the infoframe field in the playback control terminal and the playback box terminal may be modified to the concatenation number data storage field in advance, so as to store the concatenation number of the playback control terminal.
Further, an on-chip programming modification mode may be adopted to modify the infoframe reserved field or the infoframe field in the HDMI transmitting end of the playout control terminal and the HDMI transmitting end of the multiple playout box terminals into the concatenated number data storage field in advance.
The InfoFrame of the HDMI belongs to the auxiliary data category, and the InfoFrame information is transmitted to the next stage along with the HDMI line during data transmission, wherein the next stage can be an HDMI receiving chip or a display.
Assuming that the InfoFrame has 14 bytes, the actual possible bytes used are 6-13 bytes, other bytes may be the bytes that must be used, and 14 bytes may be check bits.
The HDMI sink will obtain various characteristics of the transmission image, such as encoding (RGB/YCbCr), scanning mode (Overscan/Underscan), display ratio (16:9/4:3), pixel repetition rate, etc., according to the received Infoframe information.
Step S102: and judging whether the target playing box terminal is a specific device or not through the reference terminal, if so, executing the steps S103-S104, and otherwise, executing the step S105.
In this step, the target play box terminal is: for the next-stage play box terminal connected to the reference terminal, taking the play system in fig. 1 as an example, when the reference terminal is the play control terminal, the target play box terminal is the first play box terminal connected to the play control terminal.
The specific device refers to a play box terminal supporting the cascade function.
Further, in an implementation manner, the HDMI transmitting end of the reference terminal is connected to the HDMI receiving end of the target play box terminal, and determining whether the target play box terminal is a specific device includes:
through a reference terminal (specifically, through an HDMI transmitting end of the reference terminal), EDID stored in an HDMI receiving end of the target playing box terminal is read, and whether the target playing box terminal is a specific device or not is judged according to the EDID.
Specifically, the play box terminal and the display device such as a display, a television, etc. have HDMI interfaces (including an HDMI transmitter interface and an HDMI receiver interface), each interface usually retains an EDID data, the EDID data may be stored in a program and initialized in a system start-up process, and more commonly, each HDMI interface has an EEPROM for storing the above data, and the EEPROM has a size of 256 bytes. The external equipment reads EDID data through a DDC channel of the HDMI when the HDMI is subjected to hot plug; the EDID mainly defines the image resolution, the supported sound format, the sound channel, the 3D and the like supported by the display device, and aims to inform the external device of the characteristics supported by the display device and enable the external device to output a timing supported by the display device, otherwise, if the timing output by the external device cannot be supported by the display device, the display device does not have images, sounds and the like.
For the specific devices, the EDID of each specific device contains specific manufacturer information, so that after the reference terminal reads the EDID stored in the HDMI receiving end of the target playing box terminal, whether the EDID contains the specific manufacturer information can be judged, if yes, the target playing box terminal is judged to be the specific device, and if not, the target playing box terminal is not judged to be the specific device.
Step S103: adding 1 to the cascade number of the reference terminal through the target playing box terminal to obtain a cascade number i of the target playing box terminal, and judging the target playing box terminal as a cascade playing box which is marked as the ith cascade playing box;
specifically, taking the reference terminal as the play control terminal as an example, and the cascade number of the play control terminal is 0, when the reference terminal determines that the target play box terminal is the specific device, the target play box terminal adds 1 to the cascade number 0 of the reference terminal to obtain the cascade number i of the target play box terminal, where i is equal to 1. And recording the target playing box terminal as the 1 st cascading playing box.
It should be understood that, before the adding 1 operation of the cascade number of the reference terminal by the target play box terminal, this step further includes sending the cascade number of the reference terminal to the target play box terminal by the reference terminal. Specifically, the cascade number may be stored in a cascade number data storage field (an infoframe reserved field or an infoframe field modifies the cascade number data storage field), and transmitted to the target play box terminal along with the infoframe information.
Step S104: the reference terminal is changed to the ith cascade playing box, and the step S102 is repeatedly executed.
For convenience of understanding, similarly, taking the reference terminal as the playing control terminal as an example, when the target playing box terminal is determined as the cascaded playing box in step S103, that is, after the 1 st cascaded playing box, the reference terminal is changed from the original playing control terminal to the 1 st cascaded playing box, and step S102 is repeatedly executed, then the reference terminal is the 1 st cascaded playing box, and the target playing box terminal is the next-stage playing box connected to the 1 st cascaded playing box. Step S102 is to judge whether the target play box terminal (the target play box terminal is the next play box connected to the 1 st cascaded play box) is the specific device through the 1 st cascaded play box, if yes, according to step S103, add 1 to the cascade number 1 of the reference terminal (in this case, the 1 st cascaded play box) through the target play box terminal to obtain the cascade number i, i ═ 2 of the target play box terminal (the next play box connected to the 1 st cascaded play box), and mark the target play box terminal (the next play box connected to the 1 st cascaded play box) as the 2 nd cascaded play box. Then, according to step S104, the reference terminal is changed to the 2 nd cascading play box, and step S102 is repeated again.
Step S105: if the reference terminal is the play control terminal or the No. 1 cascaded play box, judging that the play system does not have the cascaded play box, ending the automatic cascade, and if the reference terminal is the No. i cascaded play box and i is not equal to 1, taking the reference terminal as the last cascaded play box, and ending the automatic cascade.
Specifically, in this step, if the reference terminal is the play control terminal or the 1 st cascaded play box, it indicates that there is no cascaded play box in the play system (at least 2 play box terminals with the cascaded function need to be present in the play system, and the existence of the cascaded play box in the play system is determined), and the automatic cascade is directly ended.
If the reference terminal is the ith cascade playing box and i is not equal to 1 (namely, the value of i is greater than or equal to 2), the cascade playing box exists in the playing system, the reference terminal is taken as the last cascade playing box, and the automatic cascade is ended.
As shown in fig. 3, a schematic diagram of a cascade connection of a play control terminal and each cascaded play box obtained by using the automatic cascade connection method of the play box terminal in the present invention is shown, wherein fig. 3 has 4 cascaded play boxes, and Infoframe 1, Infoframe 2, Infoframe 3, and Infoframe 4, which respectively represent that the cascade numbers of the cascaded play boxes are 1, 2, 3, and 4.
In this embodiment, in the playing system, the cascaded first playing box terminal (the 1 st cascaded playing box) can be automatically identified and determined through the above steps, and other cascaded playing boxes after the cascaded first playing box terminal (the 1 st cascaded playing box) can be automatically identified, and after a certain playing box terminal is identified as a cascaded playing box, the cascade number of the playing box terminal is determined, so as to implement automatic cascading of the playing box terminals through the cascade number.
In another embodiment of the present invention, as shown in fig. 4, in step S105, if the reference terminal is the play box of the 1 st cascade, before the automatic cascade is ended, step S105 further includes: and setting the cascade number of the reference terminal to 0 through the reference terminal.
Specifically, in step S102, it is determined that the target play box terminal is not a specific device, which means that the target play box terminal is a play box terminal without a cascade function and cannot be cascaded with the reference terminal, and when the reference terminal is the 1 st cascade play box, that is, the 1 st cascade play box cannot be cascaded with the play box terminal of the next stage of the 1 st cascade play box, in this step, the cascade number of the 1 st cascade play box is set to 0 to indicate that no cascade play box exists in the play system.
In another embodiment of the present invention, as shown in fig. 5, before step S102, the method for automatic cascading further includes:
step S106: and judging whether the reference terminal reads the EDID of the target play box terminal or not through the reference terminal, if so, executing step S102, and otherwise, executing step S105.
Specifically, in this step, if the reference terminal does not read the EDID of the target playback box terminal, the following situations may exist: (1) a next-stage play box terminal connected with the reference terminal does not exist behind the reference terminal; or (2) the reference terminal and the next stage play box terminal connected with the reference terminal are disconnected. At this time, since the subsequent step S102 cannot be performed any more, the step S105 is directly executed to end the auto cascade.
In another embodiment of the present invention, as shown in fig. 6, after the target play box terminal adds 1 to the cascade number of the reference terminal to obtain the cascade number i of the target play box terminal, step S103 further includes: and storing the cascade number i of the target playing box terminal into a cascade number data storage field in the HDMI sending end of the target playing box terminal.
In still another embodiment of the present invention, as shown in fig. 7, before determining whether the target playbox terminal is the specific device through the reference terminal, step S102 further includes:
and transmitting the video source data to the HDMI receiving end of the target playing box terminal through the HDMI transmitting end of the reference terminal.
The invention also provides a cascading method of the LED display screens, which is applied to a playing system, and as shown in fig. 1, the playing system comprises a playing control terminal 1 and a plurality of playing box terminals 2.
As shown in fig. 8, the cascading play method includes:
step S701: according to the automatic cascading method of the playing box terminals, the cascading playing box is identified from the playing box terminals of the playing system, and the cascading number of the cascading playing box is determined;
step S702: and executing the network port offset step by each cascade playing box to realize cascade playing of the LED display screen.
As shown in fig. 9, which is a schematic diagram of the cascade playing effect of the LED display screen, (0, 0), (180,0), (360,0) in fig. 8 represent the display start positions of the sub video data.
Specifically, as shown in fig. 10, for a cascaded play box, the network port shifting step includes:
step S7021: determining the network port area of the cascaded playing boxes according to the number of the cascaded playing boxes, splitting video source data according to the network port area of the cascaded playing boxes, and splitting the video source data into a plurality of sub-video data.
Step S7022: and determining the sub-video data corresponding to the cascade playing boxes according to the cascade numbers of the cascade playing boxes.
Step S7023: and sending the sub-video data corresponding to the cascade playing box to an LED display screen connected with the cascade playing box.
The internet access offset is used for controlling the area of the internet access (the area of the area displayed by the display screen), and assuming that 3 playing box terminals realize the cascade function (i.e. the number of the cascade playing boxes is 3), the data sent by each cascade playing box to the LED display screen connected to the cascade playing box is 1/3 (i.e. the video source data is split into 3 sub-video data).
In the cascade playing method in this embodiment, after the automatic cascade method of the playing box terminal is used to automatically cascade the playing box terminals in the playing system, each cascade playing box numbers each cascade playing box according to the number of the cascade playing boxes, and performs the network port offset, thereby automatically implementing the cascade playing of the LED display screen and improving the playing efficiency of the display screen.
In another embodiment of the present invention, the method for cascading play further includes: if one or more cascade playing boxes are disconnected with the LED display screen connected with the cascade playing boxes, the step of residual network interface shift is executed again through the residual cascade playing boxes which are not disconnected with the LED display screen, so that cascade playing of the LED display screen is realized.
In the cascade playing method in this embodiment, after the playing box devices in the playing system are automatically cascaded, the step of network port shifting is executed by each cascade playing box, so that the cascade playing of the LED display screen is automatically realized, and the cascade playing efficiency of the LED display screen is improved.
Specifically, as shown in fig. 11, for a remaining cascaded play box, the remaining port shifting step includes:
step S801: determining the network port area of the residual cascade playing boxes according to the number of the residual cascade playing boxes, splitting video source data according to the network port area of the residual cascade playing boxes, and splitting the video source data into a plurality of sub-video data;
step S802: determining sub video data corresponding to the residual cascade playing boxes according to the cascade numbers of the residual cascade playing boxes;
step S803: and sending the sub-video data corresponding to the residual cascade playing boxes to the LED display screen connected with the residual cascade playing boxes through the residual cascade playing boxes.
When a certain cascaded playing box is disconnected from the LED display screen corresponding to the cascaded playing box, the cascaded playing method in this embodiment is adopted to adjust the display frames of the LED display screens connected to the remaining cascaded playing boxes, so that the LED display screens connected to the remaining cascaded playing boxes can play complete video frames without affecting the cascaded playing of the LED display screens.
Similarly, assuming that 3 playing box terminals originally achieve the cascade function (the number of the cascade playing boxes is 3), one cascade playing box in the middle is disconnected from the corresponding LED display screen, and the remaining 2 cascade playing boxes need to recalculate the area of the network port, the data sent by the 2 remaining cascade playing boxes to the LED display screen connected thereto is 1/2 of the video source data (i.e., the video source data is split into 2 sub-video data).
The automatic cascade method of the playing box terminal provided by the invention can automatically identify and judge the cascaded first playing box terminal (the 1 st cascaded playing box) in the playing system through the steps, automatically identify other cascaded playing boxes behind the cascaded first playing box terminal (the 1 st cascaded playing box), and determine the cascade number of the playing box terminal after identifying a certain playing box terminal as the cascaded playing box, so as to realize the automatic cascade of the playing box terminal through the cascade number and improve the cascade efficiency of the playing box terminal. Furthermore, after the automatic cascade method of the playing box terminal is used for automatically cascading the playing box terminals in the playing system, each cascade playing box numbers each cascade playing box according to the number of the cascade playing boxes, and the network port deviation is carried out, so that the cascade playing of the LED display screen is automatically realized, and the cascade playing efficiency of the LED display screen is improved.
The terms and expressions used in the specification of the present invention have been set forth for illustrative purposes only and are not meant to be limiting. It will be appreciated by those skilled in the art that changes could be made to the details of the above-described embodiments without departing from the underlying principles thereof. The scope of the invention is, therefore, indicated by the appended claims, in which all terms are intended to be interpreted in their broadest reasonable sense unless otherwise indicated.
Claims (10)
1. An automatic cascading method of playing box terminals is characterized in that the method is applied to a playing system, the playing system comprises a playing control terminal and a plurality of playing box terminals, and the automatic cascading method comprises the following steps:
step S101: presetting the cascade number of the play control terminal as 0, and taking the play control terminal as a reference terminal;
step S102: judging whether the target playing box terminal is a specific device or not through the reference terminal, if so, executing the steps S103-S104, otherwise, executing the step S105; wherein, the target playing box terminal is: the next-stage play box terminal is connected with the reference terminal;
step S103: adding 1 to the cascade number of the reference terminal through the target playing box terminal to obtain a cascade number i of the target playing box terminal, and judging the target playing box terminal as a cascade playing box which is marked as the ith cascade playing box;
step S104: changing the reference terminal into the ith cascade playing box, and repeatedly executing the step S102;
step S105: if the reference terminal is the play control terminal or the No. 1 cascade play box, judging that the play system does not have a cascade play box, ending the automatic cascade, if the reference terminal is the No. i cascade play box, and if i is not equal to 1, taking the reference terminal as the last cascade play box, and ending the automatic cascade.
2. The method for automatically cascading playing box terminals as claimed in claim 1, wherein in said step S105, if said reference terminal is a 1 st cascading playing box, before ending the automatic cascading, said step S105 further comprises:
and setting the cascade number of the reference terminal to 0 through the reference terminal.
3. The auto-cascade method of a play box terminal according to claim 1, wherein before the step S102, the auto-cascade method further comprises:
step S106: and judging whether the reference terminal reads the EDID of the target playing box terminal or not through the reference terminal, if so, executing the step S102, and otherwise, executing the step S105.
4. The method for automatically cascading playing box terminals according to claim 1, wherein the HDMI sending terminal of the reference terminal is connected to the HDMI receiving terminal of the target playing box terminal, and the determining, by the reference terminal, whether the target playing box terminal is a specific device includes:
and reading the EDID stored in the HDMI receiving end of the target playing box terminal through the reference terminal, and judging whether the target playing box terminal is a specific device or not according to the EDID.
5. The method for automatically cascading of a play box terminal as claimed in claim 1, wherein said method for automatically cascading further comprises:
and modifying the infoframe reserved field or the infoframe field in the HDMI transmitting ends of the play control terminal and the plurality of play box terminals into a cascade number data storage field in advance so as to store the cascade numbers.
6. The method for automatically cascading play box terminals as claimed in claim 5, wherein after the step S103, after the step of adding 1 to the cascade number of the reference terminal by the target play box terminal to obtain the cascade number i of the target play box terminal, further comprises:
and storing the cascade number i of the target playing box terminal into a cascade number data storage field in an HDMI transmitting end of the target playing box terminal.
7. The method for automatically cascading playing box terminals as claimed in claim 5, wherein the modification of the infoframe reserved field or the infoframe field in the HDMI transmitter of the playing control terminal and the HDMI transmitter of the plurality of playing box terminals in advance is as follows:
and modifying the infoframe reserved field or the infoframe field in the HDMI transmitting ends of the play control terminal and the plurality of play box terminals into a cascade number data storage field in advance by adopting an on-chip programming modification mode.
8. The method for automatically cascading play box terminals as claimed in claim 1, wherein before said determining whether the target play box terminal is the specific device by said reference terminal, said step S102 further comprises:
and transmitting video source data to the HDMI receiving end of the target playing box terminal through the HDMI transmitting end of the reference terminal.
9. A cascade playing method of LED display screens is characterized in that the method is applied to a playing system, the playing system comprises a playing control terminal and a plurality of playing box terminals, and the cascade playing method comprises the following steps:
the method for automatic concatenation of playbox terminals according to any one of claims 1-8, identifying a concatenated playbox from a plurality of playbox terminals of the playback system, and determining a concatenation number of the concatenated playbox;
and executing a network port offset step through each cascaded playing box to realize cascaded playing of the LED display screen, wherein for one cascaded playing box, the network port offset step comprises the following steps:
determining the network port area of the cascaded playing boxes according to the number of the cascaded playing boxes, splitting video source data according to the network port area of the cascaded playing boxes, and splitting the video source data into a plurality of sub-video data;
determining the sub-video data corresponding to the cascade playing box according to the cascade number of the cascade playing box;
and sending the sub-video data corresponding to the cascade playing box to an LED display screen connected with the cascade playing box.
10. The LED display screen cascade playing method according to claim 9, wherein the cascade playing method further comprises:
if one or more cascade playing boxes are disconnected with the LED display screen connected with the cascade playing boxes, the step of residual network interface shift is executed again through the residual cascade playing boxes which are not disconnected with the LED display screen, so that cascade playing of the LED display screen is realized;
wherein, for a remaining cascaded playing box, the remaining port shifting step comprises:
determining the network port area of the residual cascade playing boxes according to the number of the residual cascade playing boxes, splitting video source data according to the network port area of the residual cascade playing boxes, and splitting the video source data into a plurality of sub-video data;
determining sub video data corresponding to the residual cascade playing boxes according to the cascade numbers of the residual cascade playing boxes;
and sending the sub-video data corresponding to the residual cascade playing boxes to the LED display screen connected with the residual cascade playing boxes through the residual cascade playing boxes.
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