CN114268674A - Video processing equipment and video pre-monitoring method - Google Patents
Video processing equipment and video pre-monitoring method Download PDFInfo
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Abstract
The embodiment of the invention discloses video processing equipment and a video pre-monitoring method. The video processing apparatus includes, for example: the video input card is configured with a data transmission channel, wherein the data transmission channel is an Ethernet transmission channel or an LVDS channel; the pre-monitoring card is electrically connected with the video input card through the data transmission channel; the video input card is used for receiving a video source, processing the video source to obtain a processed video source and sending the processed video source to the pre-monitoring card through the data transmission channel; the pre-monitoring card is used for superposing the processed video source to the target position of the target canvas to obtain a pre-monitoring picture and outputting the pre-monitoring picture for display. The embodiment of the invention can solve the problem of complex wiring caused by the fact that the video input card needs to send the processed video source to the pre-monitoring card through the parallel bus in the prior art.
Description
Technical Field
The invention relates to the technical field of video processing, in particular to video processing equipment and a video pre-monitoring method.
Background
At present, a video processing device generally comprises a video input card and a pre-monitoring card, and during the use process of the video processing device, the pre-monitoring card needs to monitor the content of a video source input by the video input card of the current device, so that an operator can better know the state of the current device and better control the picture display.
In the prior art, the Video input card typically transmits the pre-monitor frequency source to the pre-monitor card over a parallel bus according to the Video Electronics Standards Association (VESA) or other Video Standards. While the VESA standard uses a parallel bus for transmitting the following signals: HS (1bit, line sync signal), VS (1bit, field sync signal), DE (1bit, DATA valid signal), and DATA (bits, video DATA). Therefore, when the video source is in RGB888 format, the bit width of the video data is 24 bits, and a total of 27 bits is added to the HS, VS, and DE signals, the single-channel video source needs to occupy 27 data lines. Therefore, for a device with multiple video sources, the number of data lines to be used is more, which results in complicated wiring and brings great trouble to the work of designers.
Therefore, how to solve the complex wiring problem in the prior art is a technical problem which needs to be solved urgently at present.
Disclosure of Invention
Therefore, to overcome the defects and shortcomings in the prior art, embodiments of the present invention provide a video processing device and a video pre-monitoring method.
In one aspect, an embodiment of the present invention provides a video processing apparatus, including: the video input card is configured with a data transmission channel, wherein the data transmission channel is an Ethernet transmission channel or an LVDS channel; the pre-monitoring card is electrically connected with the video input card through the data transmission channel; the video input card is used for receiving a video source, processing the video source to obtain a processed video source and sending the processed video source to the pre-monitoring card through the data transmission channel; the pre-monitoring card is used for superposing the processed video source to the target position of the target canvas to obtain a pre-monitoring picture and outputting the pre-monitoring picture for display.
In the foregoing solution, the video input card and the pre-monitor card of the video processing device in the embodiment of the present invention are electrically connected through the ethernet transmission channel or the LVDS transmission channel, and the processed video source obtained by processing by the video input card is transmitted to the pre-monitor card through the ethernet transmission channel or the LVDS channel for processing.
In an embodiment of the present invention, the video input card is configured to perform scaling processing on the video source according to a preset resolution threshold to obtain the processed video source, where the preset resolution threshold is related to a transmission bandwidth of the data transmission channel, and a resolution of the processed video source is equal to the preset resolution threshold. In this scheme, the video input card performs scaling processing on a video source according to a preset resolution threshold related to the transmission bandwidth of the data transmission channel, so that the resolution of the processed video source is suitable for transmission through the data transmission channel, thereby solving the problem that the video source with the too large resolution cannot be transmitted due to the bandwidth limitation of the data transmission channel.
In an embodiment of the present invention, the video input card is configured to receive a plurality of video sources, process the plurality of video sources to obtain a plurality of processed video sources, and send the processed video sources to the pre-monitor card through the data transmission channel, and the pre-monitor card is configured to superimpose the plurality of processed video sources on a plurality of target positions of the target canvas corresponding to the plurality of processed video sources, respectively, to obtain the pre-monitor screen, and output the pre-monitor screen for display. Here, the pre-monitor card of the video processing device according to the embodiment of the present invention can implement pre-monitor output of a plurality of video sources.
In an embodiment of the present invention, when the data transmission channel is an ethernet transmission channel, the ethernet transmission channel is a hundred-megabyte transmission channel or a gigabit transmission channel.
In one embodiment of the present invention, the video input card includes a video input interface, a first programmable logic device electrically connected between the video input interface and the first PHY chip, and a first PHY chip electrically connected to the pre-monitor card through the ethernet transmission channel.
In an embodiment of the present invention, the pre-monitor card includes a second PHY chip, a second programmable logic device, and a video output interface, the second programmable logic device is electrically connected between the second PHY chip and the video output interface, and the second PHY chip is electrically connected to the first PHY chip through the ethernet transmission channel.
In an embodiment of the present invention, when the data transmission channel is an LVDS channel, the video input card includes a video input interface and a first programmable logic device electrically connected to the video input interface, the pre-monitor card includes a second programmable logic device and a video output interface electrically connected to the second programmable logic device, and the first programmable logic device is connected to the second programmable logic device through the LVDS channel.
In one embodiment of the invention, the number of the input cards is one or more, the video output interfaces comprise a first video output interface and a second video output interface different from the first video output interface, and the first video output interface is used for being connected to an upper computer.
In another aspect, an embodiment of the present invention provides a video pre-monitoring method, which is applied to a video processing device, where the video processing device includes: the video input card is configured with a data transmission channel, wherein the data transmission channel is an Ethernet transmission channel or an LVDS channel; the pre-monitoring card is electrically connected with the video input card through the data transmission channel; the video pre-monitoring method comprises the following steps: receiving a video source by the video input card, processing the video source to obtain a processed video source, and sending the processed video source to the pre-monitoring card through the data transmission channel; and the pre-monitoring card is used for superposing the processed video source to the target position of the target canvas to obtain a pre-monitoring picture and outputting the pre-monitoring picture for display.
In the above scheme, the video input card of the video processing device applying the video pre-monitoring method is electrically connected with the pre-monitoring card through the ethernet transmission channel or the LVDS transmission channel, and the processed video source obtained by processing the video input card is transmitted to the pre-monitoring card through the ethernet transmission channel or the LVDS channel for processing.
In an embodiment of the present invention, the receiving a video source by the video input card and processing the video source to obtain a processed video source specifically includes: and the video input card performs scaling processing on the video source according to a preset resolution threshold value to obtain the processed video source, wherein the preset resolution threshold value is related to the transmission bandwidth of the data transmission channel, and the resolution of the processed video source is equal to the preset resolution threshold value.
One or more of the above technical solutions may have the following advantages or beneficial effects: the video input card of the video processing device is electrically connected with the pre-monitoring card through the Ethernet transmission channel or the LVDS transmission channel, and a processed video source obtained by processing of the video input card is transmitted to the pre-monitoring card through the Ethernet transmission channel or the LVDS channel for processing.
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 description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a video processing apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of another video processing apparatus according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of another video processing apparatus according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of another video processing apparatus according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a structure of the pre-monitor card 20 in fig. 1.
FIG. 6 is a diagram illustrating a pre-monitoring screen according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a video processing apparatus 100. The video processing apparatus 100 includes, for example, a video input card 10 and a pre-monitor card 20.
As mentioned above, the video input card 10 is configured with the data transmission channel 30, and the pre-monitor card 20 is electrically connected to the video input card 10 through the data transmission channel 30. The data transmission channel 30 is an ethernet transmission channel or an LVDS (Low-Voltage Differential Signaling) channel. Specifically, the ethernet transmission channel is, for example, a hundred mega network transmission channel or a giga network transmission channel, but may also be an ethernet transmission channel with a higher transmission rate, and the embodiment of the present invention is not particularly limited.
As mentioned above, the video input card 10 is configured to receive a video source, process the video source to obtain a processed video source, and send the processed video source to the pre-monitoring card 20 through the data transmission channel 30; the pre-monitor card 20 superimposes the processed video source on the target position of the target canvas to obtain a pre-monitor picture and outputs the pre-monitor picture for display. Here, the canvas is a container that holds the processed video source. As shown in fig. 6, which illustrates a pre-supervised screen resulting from overlaying video sources 1-4 onto a canvas. The position of each video source on the canvas can be arbitrarily set as required, and when there is a corresponding video source input, the video processing device 100 processes the corresponding video source to obtain a processed video source and superimposes the processed video source on the corresponding position of the canvas to generate a pre-monitoring picture.
In the above scheme, the video input card 10 of the video processing device 100 and the pre-monitor card 20 are electrically connected through an ethernet transmission channel or an LVDS transmission channel, and a processed video source processed by the video input card 10 is transmitted to the pre-monitor card 20 through the ethernet transmission channel or the LVDS channel for processing.
As mentioned above, the video input card 10 is configured to perform scaling processing on the video source according to a preset resolution threshold to obtain the processed video source, where the preset resolution threshold is related to the transmission bandwidth of the data transmission channel 30, and the resolution of the processed video source is equal to the preset resolution threshold. For example, in a case where the video input card 10 includes a plurality of video input interfaces and there is multi-channel video source access, for example, 4 video sources are accessed, 1 pixel occupies 24-bit data bits, and the resolutions of the video sources are 1920 pixels × 1080 pixels @60Hz (the corresponding bandwidths are 1920 × 1080 × 60 × 24 bits ═ 2986Mbit), 1280 pixels × 720 pixels @60Hz (the corresponding bandwidths are 1280 × 720 × 60 × 24 bits ═ 1327Mbit), 1366 pixels × 768 pixels @60Hz (the corresponding bandwidths are 1366 × 768 × 60 × 24 bits 1511Mbit), 1600 pixels × 1200 bits @60Hz (the corresponding bandwidths are 1600 × 1200 × 60 × 24 bits ═ 2765 Mbit); then, taking the data transmission channel 30 as an ethernet transmission channel, specifically as a gigabit network transmission channel as an example, since the total data bandwidth of the gigabit network transmission channel is 100Mbit, the data bandwidth of the gigabit network transmission channel is insufficient, and the original video source cannot be directly sent to the pre-monitor card 20, and further, since the resolution requirement of the picture to be pre-monitored and displayed during pre-monitoring is not high, in order to reduce the video source bandwidth, in the embodiment of the present invention, the video input card may, for example, scale 4 input video sources to 240pixel 135pixel @15Hz (240 frame 135 size per second), each pixel occupies 16 bits (yuv422 format), and the scaled single-path bandwidth is 240 bit 135 bit 16bit 15 frame 7776000, which is about 8Mbit, that is, 4 paths occupy 32Mbit bandwidth. Finally, the video input card 10 sequentially sends the 4 processed video sources to the pre-monitor card 20 through the hundred megabytes network transmission channel. Correspondingly, the preset resolution threshold is 240 pixels by 135 pixels @15 Hz. Of course, the above description is only an example, and the specific preset resolution threshold may also be other values, which is not limited in the embodiments of the present invention. In this scheme, the video input card performs scaling processing on a video source according to a preset resolution threshold related to the transmission bandwidth of the data transmission channel, so that the resolution of the processed video source is suitable for transmission through the data transmission channel, thereby solving the problem that the video source with the too large resolution cannot be transmitted due to the bandwidth limitation of the data transmission channel.
It should be noted that, for the case that the data transmission channel 30 is an LVDS channel, the processing procedure of the video input card 10 is the same as that of the case that the data transmission channel 30 is an ethernet transmission channel, and details thereof are not repeated herein. In addition, the transmission bandwidth of the LVDS channels is related to the number of the LVDS channels used and the data transmission rate of each LVDS channel.
In addition, when the resolution of the video source input to the video processing apparatus 100 is large enough to enable the video source to be transmitted to the pre-monitor card 20 through the data transmission channel 30 via the video input card 10, the video input card 10 only needs to perform the relevant protocol processing and the encoding and decoding processing on the input video source according to the type of the data transmission channel 30 to obtain the processed video source, and does not need to perform the scaling processing.
Bearing the above, under the condition that a video input card 10 includes a plurality of video input interfaces, the video source is a plurality of, video input card 10 is used for receiving a plurality of the video source, it is a plurality of to process respectively the video source obtains a plurality of after handling the video source and via data transmission path 30 sends to in advance monitor card 20, in advance monitor card 20 be used for with a plurality of after handling the video source superpose respectively to target canvas is corresponding to a plurality of respectively after handling the target position of video source obtains in advance monitor the picture and export for the demonstration. In the embodiment of the invention, one pre-monitoring card can realize pre-monitoring output of a plurality of video sources, thereby improving the user experience. Of course, the video processing apparatus 100 according to the embodiment of the present invention may include one or more video input cards (as shown in fig. 4), and the embodiment of the present invention is not particularly limited.
Fig. 2 shows a schematic structural diagram of a video processing device 100 for the case where the video input card 10 and the pre-monitor card 20 transmit a processed video source through an ethernet transmission channel 31. Specifically, the video input card 10 includes a video input interface 11, a first programmable logic device 12, and a first PHY chip 13, where the first programmable logic device 12 is electrically connected between the video input interface 11 and the first PHY chip 13, and the first PHY chip 13 is connected to the pre-monitor card 20 through the ethernet transmission channel 31. The pre-monitor card 20 includes a second PHY chip 21, a second programmable logic device 22, and a video output interface 23, where the second programmable logic device 22 is electrically connected between the second PHY chip 21 and the video output interface 23, and the second PHY chip 21 is electrically connected to the first PHY chip 13 through the ethernet transmission channel 31. For example, the first programmable logic device 12 and the second programmable logic device 22 may be, for example, FPGAs (programmable logic arrays), and the video input interface 11 and the video output interface 23 may be, for example, DVI interface, HDMI interface, DP interface, etc., which are not specifically limited by the embodiments of the present invention. In the case where the video processing apparatus 100 includes a plurality of input cards 10, the number of the second PHY chips 21 is equal to the number of the video input cards 10.
In view of the above, fig. 3 shows a schematic structural diagram of the video processing apparatus 100 for the case where the video input card 10 and the pre-monitor card 20 transmit the processed video source through the LVDS channel 32. Specifically, the video input card 10 includes a video input interface 11 and a first programmable logic device 12 electrically connected to the video input interface 11, the pre-monitor card 20 includes a second programmable logic device 22 and a video output interface 23 electrically connected to the second programmable logic device 22, and the first programmable logic device 12 is connected to the second programmable logic device 22 through the LVDS channel 32. For example, the first programmable logic device 12 and the second programmable logic device 22 may be, for example, FPGAs (programmable logic arrays), and the video input interface 11 and the video output interface 23 may be, for example, DVI interface, HDMI interface, DP interface, etc., which is not limited by the embodiments of the present invention.
As mentioned above, the number of the video output interfaces 23 of the pre-monitor card 20 may be multiple, for example, as shown in fig. 5, the video output interface 23 includes a first video output interface 230 and a second video output interface 232 different from the first video output interface 230, and the first video output interface 230 is used for connecting to an upper computer. Specifically, the first video output interface 230 may encode the pre-monitored picture into, for example, h.264 or h.265 format to be output to an upper computer such as a computer for displaying via a WEB page or display software installed on the computer, or directly output the pre-monitored picture to a display device having a corresponding DVI/HDMI interface through the second video output interface 232 such as a DVI/HDMI interface for displaying. Of course, the number of the video output interfaces of the pre-monitor card 20 in the embodiment of the present invention may also be more, and the embodiment of the present invention does not specifically limit the number and the type of the video output interfaces.
It should be noted that the data transmission channel can be used for transmitting control signals in addition to video sources. Here, the data transmission channel is not only used for transmitting the processed video source to the pre-monitoring card, but also used for transmitting the control signal, thereby reducing the data transmission cost.
In addition, the video processing device of the embodiment of the present invention may further include a main control card, a switch backplane, an output card, etc. besides the video input card and the pre-monitor card, and the specific connection manner thereof is known in the art, and the embodiment of the present invention is not specifically described herein.
In summary, the video input card and the pre-monitor card of the video processing device are electrically connected through the ethernet transmission channel or the LVDS transmission channel, and the processed video source obtained by the processing of the video input card is transmitted to the pre-monitor card through the ethernet transmission channel or the LVDS channel for processing.
In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present invention, and the technical solutions of the embodiments can be arbitrarily combined and collocated without conflict between technical features and structural contradictions, which do not violate the purpose of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit is merely a division of one logic function, and an actual implementation may have another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be separated, and the parts displayed as units may or may not be units, may be located in one place, or may also be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, each functional unit/module in the embodiments of the present invention may be integrated into one processing unit/module, or each unit/module may exist alone, or two or more units/modules may be integrated into one unit/module. The integrated units/modules may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units/modules.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A video processing apparatus, comprising:
the video input card is configured with a data transmission channel, wherein the data transmission channel is an Ethernet transmission channel or an LVDS channel; and
the pre-monitoring card is electrically connected with the video input card through the data transmission channel;
the video input card is used for receiving a video source, processing the video source to obtain a processed video source and sending the processed video source to the pre-monitoring card through the data transmission channel;
the pre-monitoring card is used for superposing the processed video source to the target position of the target canvas to obtain a pre-monitoring picture and outputting the pre-monitoring picture for display.
2. The video processing device according to claim 1, wherein the video input card is configured to scale the video source according to a preset resolution threshold to obtain the processed video source, wherein the preset resolution threshold is related to a transmission bandwidth of the data transmission channel, and a resolution of the processed video source is equal to the preset resolution threshold.
3. The video processing device according to claim 1, wherein the plurality of video sources are provided, the video input card is configured to receive the plurality of video sources, process the plurality of video sources respectively to obtain a plurality of processed video sources, and send the processed video sources to the pre-monitor card via the data transmission channel, and the pre-monitor card is configured to superimpose the plurality of processed video sources on a plurality of target positions of the target canvas, which correspond to the plurality of processed video sources, respectively, to obtain the pre-monitor screen and output the pre-monitor screen for display.
4. The video processing device according to claim 1, wherein when the data transmission channel is an ethernet transmission channel, the ethernet transmission channel is a hundreds of megabytes or gigabytes transmission channel.
5. The video processing device of claim 4, wherein the video input card comprises a video input interface, a first programmable logic device electrically connected between the video input interface and the first PHY chip, and a first PHY chip electrically connected to the pre-monitor card through the Ethernet transmission channel.
6. The video processing device of claim 5, wherein the pre-supervisor card comprises a second PHY chip, a second programmable logic device electrically connected between the second PHY chip and the video output interface, and a video output interface, the second PHY chip electrically connected to the first PHY chip via the Ethernet transmission channel.
7. The video processing device according to claim 1, wherein when the data transmission channel is an LVDS channel, the video input card includes a video input interface and a first programmable logic device electrically connected to the video input interface, the pre-monitor card includes a second programmable logic device and a video output interface electrically connected to the second programmable logic device, and the first programmable logic device is connected to the second programmable logic device through the LVDS channel.
8. The video processing device according to claim 5 or 7, wherein the number of the input cards is one or more, the video output interface comprises a first video output interface and a second video output interface different from the first video output interface, and the first video output interface is used for connecting to an upper computer.
9. A video pre-monitoring method is applied to a video processing device, and the video processing device comprises: the video input card is configured with a data transmission channel, wherein the data transmission channel is an Ethernet transmission channel or an LVDS channel; and a pre-monitoring card, wherein the pre-monitoring card,
the video input card is electrically connected through the data transmission channel;
the video pre-monitoring method comprises the following steps:
receiving a video source by the video input card, processing the video source to obtain a processed video source, and sending the processed video source to the pre-monitoring card through the data transmission channel; and
and the processed video source is superposed to the target position of the target canvas by the pre-monitoring card to obtain a pre-monitoring picture and output the pre-monitoring picture for display.
10. The video pre-monitoring method of claim 9, wherein receiving a video source from the video input card and processing the video source to obtain a processed video source comprises:
and the video input card performs scaling processing on the video source according to a preset resolution threshold value to obtain the processed video source, wherein the preset resolution threshold value is related to the transmission bandwidth of the data transmission channel, and the resolution of the processed video source is equal to the preset resolution threshold value.
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