CN108462839B - Director control system and method - Google Patents
Director control system and method Download PDFInfo
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- CN108462839B CN108462839B CN201810249345.9A CN201810249345A CN108462839B CN 108462839 B CN108462839 B CN 108462839B CN 201810249345 A CN201810249345 A CN 201810249345A CN 108462839 B CN108462839 B CN 108462839B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/2187—Live feed
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
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Abstract
The embodiment of the invention provides a program director control system and a program director control method, and belongs to the technical field of program directors. In the system, a director instruction is obtained through a central control device, a first instruction is sent to a video matrix selecting and cutting device according to the director instruction, the video matrix selecting and cutting device transmits a target video signal to a splicing fusion processing device according to the first instruction, after the central control device sends the first instruction for a preset time, sending a second instruction to the splicing and fusion processing equipment according to the director instruction, wherein the splicing and fusion processing equipment outputs the target video signal according to the second instruction, therefore, when the video matrix selecting and cutting equipment selects and cuts two paths of video signals with frame asynchronism, the phenomena of image black screen, shaking and the like disappear, the splicing fusion processing equipment is controlled to output the target video signals, therefore, the phenomena of image black screen, jitter and the like generated when two paths of unsynchronized frame video signals are selected and cut are hidden, and the switching process of the signals received and seen by audiences is distortion-free, stable and excessive.
Description
Technical Field
The invention relates to the technical field of broadcasting guide, in particular to a broadcasting guide control system and a broadcasting guide control method.
Background
With the rapid development of broadcast television technology, video signal display formats gradually develop towards high definition and even ultra-high definition, requirements of audiences on fluency, stability, definition and the like of watched video images are increasingly selected, especially in some important places, important time periods and real-time live broadcast occasions facing important audiences (such as some high-level conference live broadcasts, military live broadcasts and the like), display errors of 1 frame images in live broadcasts can be identified as serious live broadcast accidents, and the system is used as a direct broadcast display and control system of a broadcast television live broadcast core for ensuring the fluency and stability of live broadcast signals and faces huge challenges.
In the live broadcast task, a plurality of camera devices are generally used for shooting, so that the program has the characteristics of multiple angles and multiple scenes, and the program is more comprehensive and better in performance. The director is responsible for selecting one signal from multiple signals to broadcast to a specified channel, and is a core part for completing a live broadcast task.
Because a plurality of external signal sources exist in a live broadcast task and are asynchronous with signal frames in a broadcasting guide room, when two paths of signals which are not synchronous with the frames are switched, the phenomena of color distortion, various image loss, distortion, jitter and the like can occur, and the occurrence of a live broadcast accident is caused. At this time, frame synchronization processing equipment is needed to be adopted, an external asynchronous signal is sent to the frame synchronization processing equipment, the frame synchronization processing equipment receives a reference clock signal generated by the black field generator, an output signal is synchronized with the reference clock generated by the black field generator through methods such as digital-to-analog conversion, memory delay and the like, and various problems caused by frame selection and frame cutting asynchronous signals are eliminated.
The main disadvantages of the method adopting the black field generator and the frame synchronization processor are as follows: in the face of signals with different video display formats, corresponding frame synchronization processing equipment supporting different video display formats needs to be selected, after frame synchronization processing is carried out, the signals still are signals with different video display formats, indexes such as resolution, refresh rate and the like are different, two paths of mutually different signals are switched, problems such as color distortion, various image loss, distortion, jitter and the like can occur, and live broadcast accidents are caused.
Disclosure of Invention
It is therefore an object of the present invention to provide a broadcast directing control system and method to improve the above-mentioned problems.
In a first aspect, an embodiment of the present invention provides a director control system, where the director control system includes a central control device, a video matrix selecting and switching device, and a splicing and fusing processing device, where the central control device is configured to: obtaining a broadcast instruction, wherein the broadcast instruction is used for instructing the central control equipment to switch an output signal to a target video signal; the central control device is further configured to send a first instruction to the video matrix selection and switching device according to the director instruction, where the first instruction is used to instruct the video matrix selection and switching device to transmit the target video signal to the splicing fusion processing device; the video matrix selecting and cutting device is used for: receiving the first instruction, and transmitting the target video signal to the splicing and fusion processing equipment according to the first instruction; the central control device is further configured to send a second instruction to the splicing and fusion processing device according to the director instruction after sending the first instruction for a preset duration, where the second instruction is used to instruct the splicing and fusion processing device to output the target video signal; the splicing and fusion processing equipment is used for: and receiving the second instruction, and outputting the target video signal according to the second instruction.
Further, the output signal is transmitted from the video matrix selecting and cutting device to the splicing and fusion processing device from a first target channel, and is output from a second target channel of the splicing and fusion processing device; the video matrix selecting and cutting device is specifically configured to: switching the target video signal from the first target channel to a first standby channel according to the first instruction and transmitting the target video signal to the splicing fusion processing equipment, wherein the first standby channel is a standby channel of the first target channel; the splicing and fusion processing device is specifically used for: after receiving the target video signal input by the video matrix selection switching device, switching the target video signal from the second target channel to a second standby channel according to the second instruction, and outputting the second standby channel, wherein the second standby channel is a standby channel of the second target channel.
Furthermore, the central control device is further configured to obtain a restoration instruction, and send a third instruction to the video matrix selection and switching device according to the restoration instruction; the video matrix selection and switching equipment is further used for switching a transmission path of a video signal from the first standby channel to the first target channel according to the third instruction; the central control device is further configured to send a fourth instruction to the splicing fusion processing device according to the restoration instruction after sending the third instruction for a preset duration; the splicing and fusion processing device is further configured to switch the transmission path of the video signal from the second standby channel to the second target channel according to the fourth instruction.
Further, the splicing fusion processing device is further configured to perform frame synchronization processing on the target video signal after receiving the target video signal from the video matrix selection and switching device and before receiving the second instruction.
Further, the director control system further comprises a frame synchronization processing device, and the frame synchronization processing device is configured to perform frame synchronization processing on the target video signal and output the target video signal to the splicing fusion processing device.
In a second aspect, an embodiment of the present invention provides a director control method, which is applied to a central control device in a director control system, where the director control system further includes a video matrix selecting and switching device and a splicing fusion processing device, and the method includes: obtaining a broadcast instruction, wherein the broadcast instruction is used for instructing the central control equipment to switch an output signal to a target video signal; sending a first instruction to the video matrix selecting and switching equipment according to the broadcasting instruction, wherein the first instruction is used for instructing the video matrix selecting and switching equipment to transmit the target video signal to the splicing fusion processing equipment; and after the first instruction is sent for a preset time, sending a second instruction to the splicing and fusion processing equipment according to the director instruction, wherein the second instruction is used for instructing the splicing and fusion processing equipment to output the target video signal.
Further, the output signal is transmitted from the video matrix selecting and cutting device to the splicing and fusion processing device from a first target channel, and is output from a second target channel of the splicing and fusion processing device; the first instruction is specifically configured to instruct the video matrix selection and switching device to switch the target video signal from the first target channel to a first standby channel and transmit the target video signal to the splicing fusion processing device, where the first standby channel is a standby channel of the first target channel; the second instruction is specifically configured to instruct the splicing fusion processing device to switch the target video signal from the second target channel to a second standby channel for output, where the second standby channel is a standby channel of the second target channel.
Further, after sending the first instruction for a preset duration, and sending a second instruction to the splicing fusion processing device according to the director instruction, the method further includes: obtaining a restoration instruction, and sending a third instruction to the video matrix selective switching device according to the restoration instruction, wherein the third instruction is used for instructing the video matrix selective switching device to switch a transmission path of a video signal from the first standby channel to the first target channel; and after the third instruction is sent for a preset time, sending a fourth instruction to the splicing and fusion processing device according to the recovery instruction, wherein the fourth instruction is used for instructing the splicing and fusion processing device to switch the transmission path of the video signal from the second standby channel to the second target channel.
Further, the second instruction is also used for instructing the splicing fusion processing device to perform frame synchronization processing on the target video signal after receiving the target video signal from the video matrix selection and switching device and before receiving the second instruction.
Further, the director control system further includes a frame synchronization processing device, and after sending the first instruction to the video matrix selection and switching device according to the director instruction, after sending the first instruction for a preset time, before sending the second instruction to the splicing and fusion processing device according to the director instruction, the method further includes: and the frame synchronization processing equipment performs frame synchronization processing on the target video signal and outputs the target video signal to the splicing fusion processing equipment.
The embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides a director control system and a method, firstly, a central control device obtains a director instruction, the director instruction is used for instructing the central control device to switch an output signal to a target video signal, then the central control device sends a first instruction to a video matrix selecting and cutting device according to the director instruction, the first instruction is used for instructing the video matrix selecting and cutting device to transmit the target video signal to a splicing and fusion processing device, the video matrix selecting and cutting device transmits the target video signal to the splicing and fusion processing device according to the first instruction after receiving the first instruction, the central control device sends a second instruction to the splicing and fusion processing device according to the director instruction after sending the first instruction for a preset time length, the second instruction is used for instructing the splicing and fusion processing device to output the target video signal, after the splicing fusion processing equipment receives the second instruction, the target video signal is output according to the second instruction, so that the target video signal can be output after waiting for a preset time length, namely, the phenomena of image black screen, jitter and the like can disappear when the splicing fusion processing equipment waits for the video signals with two asynchronous frames selected and cut by the video matrix selecting and cutting equipment, and then the splicing fusion processing equipment is controlled to output the target video signal, so that the phenomena of image black screen, jitter and the like generated when the video signals with two asynchronous frames are selected and cut are hidden, and the signal switching process of the audience is distortion-free and stable.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a block diagram of a director control system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus according to an embodiment of the present invention;
fig. 3 is an output schematic diagram of a splicing fusion processing device according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another apparatus provided in the embodiment of the present invention;
fig. 5 is a flowchart of a director control method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a block diagram of a director control system 100 according to an embodiment of the present invention, where the director control system 100 includes a central control device 110, a video matrix selecting and switching device 120, and a splicing and fusion processing device 130, where the central control device 110 is connected to the video matrix selecting and switching device 120 and the splicing and fusion processing device 130, respectively, and the video matrix selecting and switching device 120 is connected to the splicing and fusion processing device 130.
The video matrix selecting and switching device 120 is an electronic device that can output m channels of video signals to n channels of monitoring devices by an array switching method, that is, switches a video image from any input channel to any output channel, that is, is used for selecting and switching the video signals.
The stitching fusion processing device 130 is configured to divide a complete image signal into N blocks and then distribute the N blocks to N video display units (e.g., rear projection units), so as to complete a super-large screen dynamic image display screen formed by a plurality of common video units.
In the embodiment of the present invention, the splicing fusion processing device 130 has a built-in frame synchronization processing function and a signal conversion function, and controls an output window thereof to switch any input channel signal, so that distortion-free smooth transition can be achieved, and the video matrix selecting and switching device 120 has a large-order signal receiving and processing capability. Therefore, the advantages of the splicing fusion processing device 130 and the video matrix selecting and cutting device 120 can be combined, and the process of signal switching distortion phenomenon of the video matrix selecting and cutting device 120 can be covered and shielded by using the smooth effect of signal switching of the splicing fusion processing device 130.
The central control device 110 is configured to obtain a broadcast instruction, where the broadcast instruction is used to instruct the central control device 110 to switch an output signal to a target video signal.
If the director operates the central control device 110, the output signal of the target needs to be switched to a target video signal, for example, the current output signal is a signal output by a field camera in a field of a football game, and the target video signal is a signal output by a goal camera, and if the switching is required, the director can directly operate on the central control device 110, for example, a director command is input, which indicates that the current output signal needs to be switched to the target video signal, or the director can also send the director command to the central control device 110 through a terminal device.
The central control device 110 is further configured to send a first instruction to the video matrix selecting and switching device 120 according to the director instruction, that is, after the central control device 110 obtains the director instruction, the first instruction is sent to the video matrix selecting and switching device 120, and the first instruction is used to instruct the video matrix selecting and switching device 120 to transmit the target video signal to the splicing and fusion processing device 130.
The video matrix selecting and switching device 120 is configured to receive the first instruction, and transmit the target video signal to the splicing and fusion processing device 130 according to the first instruction, that is, after receiving the first instruction, the video matrix selecting and switching device 120 selects and switches an output signal into the target video signal and outputs the target video signal to the splicing and fusion processing device 130.
The central control device 110 is further configured to send a second instruction to the splicing and fusion processing device 130 after sending the first instruction for a preset time according to the director instruction, where the second instruction is used to instruct the splicing and fusion processing device 130 to output the target video signal. That is to say, after the central control device 110 sends the first instruction to the video matrix selecting and cutting device 120, the second instruction is sent to the splicing and fusion processing device 130 at an interval of a preset time length, so that the splicing and fusion processing device 130 receives the second instruction and outputs the target video signal according to the second instruction, wherein the preset time length can be preset according to experience and multiple tests of a director, the time of the preset time length can be time of distortion, jitter and black screen caused by the selection and cutting of the video signal, so that the target video signal can be output after waiting for the preset time length, that is, the phenomena of image black screen, jitter and the like generated when the video matrix selecting and cutting device 120 selects and cuts two paths of video signals with unsynchronized frames disappear, and the splicing and fusion processing device 130 is controlled to output the target video signal, so that the image black screen, the jitter and the like generated when the video signals with unsynchronized frames are selected and cut are hidden, Jitter and the like, so that the switching process of the signals received and seen by the audience is distortion-free, smooth and excessive.
In addition, in the practical application process, since some of the director control systems 100 are live broadcast with multiplexed output signals simultaneously, in order to avoid that the central control device 110 receives multiple director instructions simultaneously, and the video matrix selecting and switching device 120 selects and switches the same output channel, standby channels need to be set on the video matrix selecting and switching device 120 and the splicing and merging processing device 130. The output signal is transmitted from the first target channel of the video matrix selecting and cutting device 120 to the splicing and fusion processing device 130, and is output from the second target channel of the splicing and fusion processing device 130.
Specifically, the video matrix selecting and switching device 120 is specifically configured to switch the target video signal from the first target channel to a first standby channel according to the first instruction and transmit the switched target video signal to the splicing and fusion processing device 130, where the first standby channel is a standby channel of the first target channel; the splicing and fusion processing device 130 is specifically configured to, after receiving the target video signal input by the video matrix selecting and switching device 120, switch the target video signal from the second target channel to a second standby channel according to the second instruction, and output the second standby channel, where the second standby channel is a standby channel of the second target channel.
Referring to fig. 2 and fig. 3, it is assumed that the number of output windows of the splicing and fusion processing device 130 is a positive integer x, the input channels 1 to x of the splicing and fusion processing device 130 receive the video signals output by the video matrix selecting and switching device 120, and the input channels x +1 to x 2 are backup channels (the number of input channels of the splicing and fusion processing device 130 is generally more than 2 times that of the output windows and is expandable, and the situation that the number of input channels is < x 2 does not occur), and receive the video signals output by the video matrix selecting and switching device 120, (when the number of input video matrix output signals is 2 times that of output windows of the splicing and fusion processing device 130, the problem of insufficient number of backup alternate input channels when multiple output windows switch information at the same time can be avoided, and when the central control device 110 is programmed by software, the control logic relationship is simple and clear, for example, the backup alternate channel of the input channel 1 of the splicing and fusion processing device 130 is the input channel x +1, alternate channel alternate to input channel 2 is input channel x +2, and so on). In fig. 2, n is a positive integer and represents the maximum number of input channels of the matrix.
Referring to fig. 4, after receiving the director instruction, the central control device 110 analyzes the director instruction, accesses the input channel a of the video matrix selecting and switching device 120 after the target video signal is transmitted and processed, and assumes that the input channel a is an input channel a (where a is a positive integer and 0< a < n), obtains the output window a of the splicing and fusing device 130 as the broadcast target, assumes that the output window D is an output window D (where D is a positive integer and 0< D < x), controls the human-computer interaction interface of the central control software, and sequentially selects output D and input a.
Then, the number of input channels displayed by the output window D of the splicing and fusion processing device 130 is obtained, and if the input channel B is assumed to be an input channel B (B is a positive integer, 0< B < x), the standby alternate input channel is an input channel B + x, the information of the input channel B of the splicing and fusion processing device 130 comes from the output C of the video matrix (C is a positive integer, 0< C < maximum output number-x of the video matrix), and the information of the input channel B + x of the splicing and fusion processing device 130 comes from the output C + x of the video matrix.
The input channel a-output channel C of the video matrix selecting and cutting device 120 may be defined as a first target channel of the video matrix selecting and cutting device 120, the input channel Y (which may be the input channel a or other input channels except the input channel a) -output channel C + X of the video matrix selecting and cutting device 120 may be defined as a first spare channel of the video matrix selecting and cutting device 120, the input channel B-output window D of the stitching and fusing device 130 may be defined as a second target channel of the stitching and fusing device 130, and the input channel B + X-output window D of the stitching and fusing device 130 may be defined as a second spare channel which may be defined as a stitching and fusing channel.
Therefore, the central control device 110 sends the first instruction to the video matrix selecting and switching device 120 after obtaining the director instruction, so that the video matrix selecting and switching device 120 switches the output channel C to the output channel C + X according to the first instruction, and outputs the target video signal from the output channel C + X, after the interval preset time length, the central control device 110 sends the second instruction to the splicing and fusion processing device 130, so that the splicing and fusion processing device 130 switches the input channel B to B + X, and the target video signal is input from the input channel B + X, output from the output window D to the splicing and fusion large screen, and switching of the video signal is completed.
Wherein, for the setting of the standby channel, the setting can be carried out by the following steps:
(1) firstly, a signal transmission link of the broadcast directing control system 100 needs to be modified, a standby input channel is added to the input end of the splicing and fusion processing equipment 130, and the number of signals sent to the splicing and fusion processing equipment 130 by the video matrix selecting and cutting equipment 120 is more than or equal to the number of broadcasting windows of the splicing and fusion processing equipment 130 by 2;
(2) defining a 1-to-1 corresponding relation between an output window and an input channel of the splicing fusion processing device 130 in a normal mode;
(3) defining a 1-to-1 corresponding relation between an output window and an input channel of the splicing fusion processing equipment 130 in a standby shielding mode;
(4) acquiring a 1-to-1 corresponding relation between an output channel of the video matrix selecting and cutting device 120 and an input channel of the splicing fusion processing device 130 according to the device connection line;
(5) recording the time required by the video matrix selecting and cutting equipment 120 from the selecting and cutting instruction to the stability of the selecting and cutting image, wherein the time is accurate to millisecond level, namely the preset time length;
(6) and viewing the device specification, and acquiring the control protocol and the instruction of the splicing fusion processing device 130 and the video matrix selecting and switching device 120.
(7) The software man-machine interaction interface of the central control device 110 is designed to be divided into an output control group and an input control group, the output control group buttons sequentially correspond to the output windows of the splicing fusion processing device 130, and the input control group sequentially corresponds to the input channels of the video matrix selecting and switching device 120.
(8) The control logic relation of the central control device 110 is designed, the operator controls the human-computer interaction interface, firstly selects any output button to obtain the corresponding output window value of the splicing fusion processing device 130, and then selects an input button to obtain the corresponding input channel value of the video matrix selecting and cutting device 120.
(9) And (3) writing a signal selection and cutting method of the software of the central control equipment 110, circularly and alternately outputting the steps and writing the signal selection and cutting method by taking the output and input numerical values obtained in the step (8) as variables and taking the information obtained in the steps (2), (3), (4), (5) and (6) as conditions.
(10) And (3) checking the actual signal broadcasting effect of the program director control system 100 by using a software testing process, modifying the delay time obtained in the step (4), compressing the delay time as much as possible on the premise of ensuring the smooth selection and switching effect, and increasing the execution speed of the method.
In addition, in order to maintain a good control logic relationship of the director control system 100, considering the problem of instruction conflict between multi-user distributed control of the director control system 100 and simultaneous switching of multiple output windows, the video matrix selecting and switching device 120 and the splicing fusion processing device 130 need to be controlled to restore to the previous state, the video matrix selecting and switching device is controlled to switch a broadcast signal to the splicing fusion processing device 130 to broadcast an original display channel of a window, and the original display channel is switched to the broadcast window of the splicing fusion processing device 130 after the phenomena of image black screen, jitter and the like generated when the video matrix selecting and switching device 120 selects and switches two paths of video signals with unsynchronized frames disappear.
And finally, programming and modifying the central control system software, and compiling the signal switching mode into a signal selection and switching method of the central control system software, so that the operation steps can be greatly reduced, the reaction speed can be improved, and the execution time of each instruction can be controlled, so that the method has feasibility of practical application.
That is, the central control device 110 is further configured to obtain a restoration instruction, and send a third instruction to the video matrix selecting and switching device 120 according to the restoration instruction, where the third instruction is used to instruct the video matrix selecting and switching device 120 to switch the first standby channel to the first target channel, that is, the video matrix selecting and switching device 120 switches the transmission path of the video signal from the first standby channel to the first target channel according to the third instruction after obtaining the third instruction.
The central control device 110 is further configured to send a fourth instruction to the splicing and fusion processing device 130 according to the recovery instruction after sending the third instruction for a preset time, where the fourth instruction is used to instruct the splicing and fusion processing device 130 to switch the second standby channel to the second target channel, that is, after receiving the fourth instruction, the splicing and fusion processing device 130 switches the transmission path of the video signal from the second standby channel to the second target channel, so that the transmission path of the video signal can be recovered.
Because a part of the central control system adopts a distributed design and adopts a mode of adding a server and a plurality of terminals to meet the requirement of multi-user parallel operation in the director control system 100, in order to ensure that the problem of instruction conflict does not exist during parallel operation, the transmission path needs to be restored in the embodiment. If not, after the first instruction or the second instruction is completed, the original display channel and the standby channel are exchanged, a variable record is needed to be set to record the change, the change is used for acquiring the numerical values of the current display channel and the standby channel when the first instruction and the second instruction are executed again next time, the variable needs to be stored in the server because the variable is shared by adopting multi-terminal operation, each terminal needs to acquire the numerical value of the variable from the server when selection switching is carried out, and if the numerical value of the variable needs to be uploaded to the server after being changed, due to the existence of delay time in the process, a delay waiting process can be carried out when the terminal just acquires the numerical value of the variable, the variable is modified by another terminal, signal selection and switching errors can be caused, if the transmission path is recovered, the display channel numerical value is obtained by analyzing and broadcasting instructions of the terminal, and the standby channel numerical value is the numerical value + X of the variable, the logical relationship does not change, whereby the above-mentioned problems can be avoided.
In addition, since the splicing fusion processing device 130 further has a frame synchronization function, in order to reduce the distortion time generated when two paths of frame asynchronous signals are selected and switched, the splicing fusion processing device 130 is further configured to perform frame synchronization processing on the target video signal before the second instruction has been received after the target video signal is received from the video matrix selection and switching device 120, so that a target video signal frame-synchronized with the current output signal can be output.
Certainly, in order to save cost, if some splicing fusion processing devices 130 do not have a frame synchronization processing function, the director control system 100 further includes a frame synchronization processing device connected to the output channel of the video matrix selecting and switching device 120, where the frame synchronization processing device is configured to perform frame synchronization processing on the target video signal and output the target video signal to the splicing fusion processing device 130, so that the delay time of instruction delay processing can be reduced, that is, the set time of preset duration is reduced, the instruction execution speed can be increased, and the information selecting and switching display effect is optimized.
In addition, if there is enough time to prepare before the director task starts, the central control device 110 does not adopt a distributed design, and only one manipulator operates the central control system at the same time. The method can be adopted, namely, the splicing and fusion processing device 130 is controlled to select and switch the standby input channel from the output window, the video matrix selecting and switching device 120 is controlled to select and switch the image to the original input channel of the output window of the splicing and fusion processing device 130, the phenomena of image black screen, shaking and the like generated when the video matrix selecting and switching device 120 selects and switches two paths of video signals with unsynchronized frames disappear, and then the splicing and fusion processing device 130 is controlled to select and switch the output window to the original input channel. And meanwhile, the video matrix is controlled to select and cut the image to the standby input channel of the output window of the splicing and fusion processing device 130. The method is that the execution of the current selection-cut instruction needs to be based on the correct execution of the previous selection-cut instruction, so that before the director task starts, a certain preparation time needs to be reserved for the operation and management personnel to switch the display content of the output window of each splicing fusion processing device 130 more than once, so that 1-step instruction delay processing is simplified, and the instruction execution speed can be increased.
Therefore, the embodiment of the present invention combines the advantages of the splicing fusion processing device 130 and the video matrix selecting and switching device 120, and blocks the distortion phenomenon of signal switching of the video matrix selecting and switching device 120 by using the smooth signal switching effect of the splicing fusion processing device 130, thereby solving the problem of fewer input and output channels of the splicing fusion processing device 130, and solving the problems of image black screen, image jitter and the like when the video matrix selecting and switching device 120 selects and switches two channels of video signals with unsynchronized frames. Under the condition of not adopting frame synchronization processing, the frame synchronization processing effect on signals with large magnitude order is realized, a large amount of funds are saved, and the requirement of the live broadcast task of the director control system 100 is met.
Meanwhile, the selection and switching processing link of the video matrix selection and switching equipment 120 not only represents a single video matrix selection and switching equipment 120, but also can realize the distortion-free stable transition effect of the selection and switching of signals of various video display formats by serially connecting a plurality of video matrix selection and switching equipment 120 supporting different video display formats through signal conversion equipment. The frame synchronizer is not available in the past, and because the indexes of resolution, refresh rate and the like of signals in different video display formats are different, even if the frame synchronization processing is carried out, the video display formats are not changed, the indexes of resolution, refresh rate and the like are still different, and the problems of color distortion, various image loss, distortion, jitter and the like still occur when two paths of different signals are switched. The embodiment of the invention effectively solves the problem of undistorted smooth selection and cutting of signals with various video display formats by hiding the signal selection and cutting distortion process, and greatly improves the signal compatibility of the director control system 100.
Referring to fig. 5, fig. 5 is a flowchart of a director control method according to an embodiment of the present invention, where the method is applied to the director control system 100, and the method includes the following steps:
step S110: a director instruction is obtained.
The director instruction is used to instruct the central control device 110 to switch the output signal to the target video signal.
Step S120: and sending a first instruction to the video matrix selecting and cutting device 120 according to the broadcasting instruction.
The first instruction is used to instruct the video matrix selection and switching device 120 to transmit the target video signal to the splicing fusion processing device 130
Step S130: and after sending the first instruction for a preset time, sending a second instruction to the splicing fusion processing device 130 according to the director instruction.
The second instruction is used to instruct the splicing fusion processing device 130 to output the target video signal.
As an embodiment, the output signal is transmitted from the video matrix selecting and cutting device 120 to the splicing and fusion processing device 130 from a first target channel, and is output from a second target channel of the splicing and fusion processing device 130; the first instruction is specifically configured to instruct the video matrix selecting and switching device 120 to switch the target video signal from the first target channel to a first standby channel and transmit the target video signal to the splicing and fusion processing device 130, where the first standby channel is a standby channel of the first target channel; the second instruction is specifically configured to instruct the splicing fusion processing device 130 to switch the target video signal from the second target channel to a second standby channel for output, where the second standby channel is a standby channel of the second target channel.
As an implementation manner, after sending the first instruction for a preset time, and after sending a second instruction to the splicing fusion processing device 130 according to the director instruction, the method further includes:
obtaining a restoration instruction, and sending a third instruction to the video matrix selecting and switching device 120 according to the restoration instruction, where the third instruction is used to instruct the video matrix selecting and switching device 120 to switch the transmission path of the video signal from the first standby channel to the first target channel; after sending the third instruction for a preset time, sending a fourth instruction to the splicing and fusion processing device 130 according to the restoration instruction, where the fourth instruction is used to instruct the splicing and fusion processing device 130 to switch the transmission path of the video signal from the second standby channel to the second target channel.
As an embodiment, the second instruction is further configured to instruct the stitching fusion processing device 130 to perform frame synchronization processing on the target video signal after receiving the target video signal from the video matrix selection and switching device 120 and before receiving the second instruction.
As an embodiment, the director control system 100 further includes a frame synchronization processing device, and after sending the first instruction to the video matrix selection and switching device 120 according to the director instruction, and after sending the first instruction for a preset time period, before sending the second instruction to the splicing and fusion processing device 130 according to the director instruction, the method further includes: the frame synchronization processing device performs frame synchronization processing on the target video signal and outputs the target video signal to the splicing fusion processing device 130.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the method described above may refer to the corresponding process in the foregoing system, and will not be described in too much detail herein.
To sum up, the present invention provides a director control system 100 and method, first, a central control device 110 obtains a director instruction, where the director instruction is used to instruct the central control device 110 to switch an output signal to a target video signal, then the central control device 110 sends a first instruction to a video matrix selection and switching device 120 according to the director instruction, where the first instruction is used to instruct the video matrix selection and switching device 120 to transmit the target video signal to a splicing and fusion processing device 130, after receiving the first instruction, the video matrix selection and switching device 120 transmits the target video signal to the splicing and fusion processing device 130 according to the first instruction, after sending the first instruction for a preset time duration, the central control device 110 sends a second instruction to the splicing and fusion processing device 130 according to the director instruction, where the second instruction is used to instruct the splicing and fusion processing device 130 to output the target video signal, after the splicing fusion processing device 130 receives the second instruction, the target video signal is output according to the second instruction, so that the target video signal can be output after waiting for a preset time length, namely, the phenomena of image black screen, jitter and the like generated when the video matrix selecting and cutting device 120 selects and cuts two paths of video signals with frame asynchronization disappear, and then the splicing fusion processing device 130 is controlled to output the target video signal, so that the phenomena of image black screen, jitter and the like generated when the two paths of video signals with frame asynchronization are hidden, and the signal switching process of the audience is distortionless and smooth transition.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (8)
1. A broadcast guiding control system is characterized in that the broadcast guiding control system comprises a central control device, a video matrix selecting and cutting device and a splicing fusion processing device,
the central control equipment is used for: obtaining a broadcast instruction, wherein the broadcast instruction is used for instructing the central control equipment to switch an output signal to a target video signal;
the central control device is further configured to send a first instruction to the video matrix selection and switching device according to the director instruction, where the first instruction is used to instruct the video matrix selection and switching device to transmit the target video signal to the splicing fusion processing device;
the video matrix selecting and cutting device is used for: receiving the first instruction, and transmitting the target video signal to the splicing and fusion processing equipment according to the first instruction;
the central control device is further configured to send a second instruction to the splicing and fusion processing device according to the director instruction after sending the first instruction for a preset duration, where the second instruction is used to instruct the splicing and fusion processing device to output the target video signal;
the splicing and fusion processing equipment is used for: receiving the second instruction and outputting the target video signal according to the second instruction;
the output signals are transmitted from the video matrix selection and switching equipment to the splicing and fusion processing equipment from a first target channel and output from a second target channel of the splicing and fusion processing equipment;
the video matrix selecting and cutting device is specifically configured to: switching the target video signal from the first target channel to a first standby channel according to the first instruction and transmitting the target video signal to the splicing fusion processing equipment, wherein the first standby channel is a standby channel of the first target channel;
the splicing and fusion processing device is specifically used for: after receiving the target video signal input by the video matrix selection switching device, switching the target video signal from the second target channel to a second standby channel according to the second instruction, and outputting the second standby channel, wherein the second standby channel is a standby channel of the second target channel.
2. The system of claim 1,
the central control device is further configured to obtain a restoration instruction, and send a third instruction to the video matrix selection and switching device according to the restoration instruction;
the video matrix selection and switching equipment is further used for switching a transmission path of a video signal from the first standby channel to the first target channel according to the third instruction;
the central control device is further configured to send a fourth instruction to the splicing fusion processing device according to the restoration instruction after sending the third instruction for a preset duration;
the splicing and fusion processing device is further configured to switch the transmission path of the video signal from the second standby channel to the second target channel according to the fourth instruction.
3. The system according to claim 1 or 2, wherein the splicing fusion processing device is further configured to perform frame synchronization processing on the target video signal after receiving the target video signal from the video matrix selection and switching device and before receiving the second instruction.
4. The system according to claim 1 or 2, wherein the director control system further comprises a frame synchronization processing device, and the frame synchronization processing device is configured to perform frame synchronization processing on the target video signal and output the target video signal to the splicing fusion processing device.
5. A broadcast guiding control method is applied to a central control device in a broadcast guiding control system, the broadcast guiding control system further comprises a video matrix selecting and cutting device and a splicing fusion processing device, and the method comprises the following steps:
obtaining a broadcast instruction, wherein the broadcast instruction is used for instructing the central control equipment to switch an output signal to a target video signal;
sending a first instruction to the video matrix selecting and switching equipment according to the broadcasting instruction, wherein the first instruction is used for instructing the video matrix selecting and switching equipment to transmit the target video signal to the splicing fusion processing equipment; and
after the first instruction is sent for a preset time, sending a second instruction to the splicing and fusion processing equipment according to the director instruction, wherein the second instruction is used for instructing the splicing and fusion processing equipment to output the target video signal;
the output signals are transmitted from the video matrix selection and switching equipment to the splicing and fusion processing equipment from a first target channel and output from a second target channel of the splicing and fusion processing equipment;
the first instruction is specifically configured to instruct the video matrix selection and switching device to switch the target video signal from the first target channel to a first standby channel and transmit the target video signal to the splicing fusion processing device, where the first standby channel is a standby channel of the first target channel;
the second instruction is specifically configured to instruct the splicing fusion processing device to switch the target video signal from the second target channel to a second standby channel for output, where the second standby channel is a standby channel of the second target channel.
6. The method according to claim 5, wherein after sending the first instruction for a preset duration, and after sending a second instruction to the splicing and fusion processing device according to the director instruction, the method further comprises:
obtaining a restoration instruction, and sending a third instruction to the video matrix selective switching device according to the restoration instruction, wherein the third instruction is used for instructing the video matrix selective switching device to switch a transmission path of a video signal from the first standby channel to the first target channel;
and after the third instruction is sent for a preset time, sending a fourth instruction to the splicing and fusion processing device according to the recovery instruction, wherein the fourth instruction is used for instructing the splicing and fusion processing device to switch the transmission path of the video signal from the second standby channel to the second target channel.
7. The method according to claim 5 or 6, wherein the second instruction is further used for instructing a splicing fusion processing device to perform frame synchronization processing on the target video signal after receiving the target video signal from the video matrix selection and switching device and before receiving the second instruction.
8. The method according to claim 5 or 6, wherein the director control system further includes a frame synchronization processing device, and after sending the first instruction to the video matrix selection and switching device according to the director instruction and after sending the first instruction for a preset time period, before sending the second instruction to the splicing and fusion processing device according to the director instruction, the method further includes:
and the frame synchronization processing equipment performs frame synchronization processing on the target video signal and outputs the target video signal to the splicing fusion processing equipment.
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