CN216391221U - Video signal transmitting card and video display system - Google Patents
Video signal transmitting card and video display system Download PDFInfo
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- CN216391221U CN216391221U CN202122994277.9U CN202122994277U CN216391221U CN 216391221 U CN216391221 U CN 216391221U CN 202122994277 U CN202122994277 U CN 202122994277U CN 216391221 U CN216391221 U CN 216391221U
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- 238000010586 diagram Methods 0.000 description 8
- 230000003139 buffering effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
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Abstract
The utility model relates to the technical field of video signal processing, and provides a video signal transmitting card and a video display system, wherein the video signal transmitting card is applied to the video display system and comprises the following components: a video decoding module; a volatile memory; the video signal output interface is used for being connected with a display screen; the video signal input interface is used for receiving two paths of the same main path video signals and standby path video signals; and the controller is respectively connected with the video decoding module, the volatile memory and the video signal output interface, and can control the main video signal which is decoded and then written into the volatile memory together to be sent to the display screen to be switched into the standby video signal when receiving a trigger instruction that the main video signal is abnormal, and lock the main video signal written into the volatile memory in the switching process. The present disclosure improves picture stability of a display screen.
Description
Technical Field
The present invention relates to the field of video signal display technology, and more particularly, to a video signal transmitting card and a video display system.
Background
In some application scenes with high requirements on the stability of video display pictures, a two-way video signal backup mode of a main path and a standby path is generally adopted, namely, a main path video signal is displayed in a display screen, when the main path video signal fails, the main path video signal is immediately switched to the standby path video signal for displaying, and the stability of video display can be effectively improved through the two-way video signal backup mode. However, in practical use, it is found that in the process of switching the main-path video signal and the standby-path video signal, the display screen may flicker, instantly turn black, and even display disordered images or noise, or the switching process is long, which does not meet the requirement of some users for high stability.
Therefore, how to overcome the problem that the display picture is unstable in the process of switching the main/standby signals of the display screen is a current technical problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a video signal transmitting card and a video display system, which aim to solve the technical problem that a display picture is unstable in the process of switching a main signal and a standby signal of a display screen in the prior art.
In order to achieve the purpose, the utility model adopts the technical scheme that:
in one aspect, the present invention provides a video signal transmitting card, including: a video decoding module; a volatile memory; the video signal output interface is used for being connected with a display screen; the video signal input interface is used for receiving two paths of the same main path video signals and standby path video signals; and the controller is respectively connected with the video decoding module, the volatile memory and the video signal output interface, and can control the main video signal which is decoded and then written into the volatile memory together to be sent to the display screen to be switched into the standby video signal when receiving a trigger instruction that the main video signal is abnormal, and lock the main video signal written into the volatile memory in the switching process.
In one embodiment, the video signal input interface includes: a first video signal interface for receiving a main path video signal; and the second video signal interface is used for receiving the standby video signal, and the main video signal and the standby video signal are the same video signal.
In one embodiment, the video decoding module comprises: a first video decoding module; the first video decoding module is respectively connected with the first video signal interface, the second video signal interface and the controller.
In one embodiment, the video decoding module comprises: the video decoding device comprises a first video decoding module and a second video decoding module; the first video decoding module is connected with the first video signal interface, the second video decoding module is connected with the second video signal interface, and the controller is respectively connected with the first video decoding module and the second video decoding module.
In one embodiment, the video signal input interface includes an S terminal, a VGA interface, a DVI interface, an HDMI interface, a DP interface, and an SDI interface.
In one embodiment, volatile memory includes dynamic random access memory and static random access memory.
In one embodiment, the controller comprises a micro control unit, a programmable logic device and a non-volatile memory, wherein the micro control unit is connected with the programmable logic device, and the programmable logic device is respectively connected with the non-volatile memory and the video signal output interface.
In one embodiment, the programmable logic device is an FPGA.
In one embodiment, the non-volatile memory is a flash memory or a read-only memory.
On the other hand, the utility model also provides a video display system, which comprises the video signal transmitting card and at least one display screen, wherein each display screen comprises a display control module; each display control module in the at least one display screen is respectively connected with the video signal output interface in the video signal transmitting card in parallel.
The video signal transmitting card provided by the utility model has the beneficial effects that: the signal to be displayed sent to the display screen is cached through the volatile memory, the video signal cached in the volatile memory is locked in the process of switching the main video signal and the standby video signal, the normal video signal is sent to the display screen to be displayed in the process of switching the main video signal and the standby video signal, the condition that a display picture flickers or is instantly black in the switching process is avoided, and the picture stability of the display screen is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described 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 without creative efforts.
Fig. 1 is a schematic structural diagram of a video signal transmitting card according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another video signal transmitting card according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another video signal transmitting card according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a video display system according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
| 1 | video |
2 | |
| 11 | Video |
111 | First |
| 112 | Second |
12 | |
| 121 | First |
122 | Second |
| 13 | |
131 | |
| 132 | |
133 | |
| 14 | |
15 | VideoSignal output interface |
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
Referring to fig. 1, a schematic structural diagram of a video signal transmitting card according to an embodiment of the present disclosure is shown. As shown in fig. 1, the video signal transmitting card 1 includes: the video signal processing device comprises a video signal output interface, a video decoding module 12, a volatile memory 14, a video signal input interface 11 and a controller 13, wherein the video signal output interface 15 is used for being connected with a display screen, the video signal input interface 11 is connected with the video decoding module 12, the video signal input interface 11 is used for receiving two paths of same main video signals and standby video signals, the controller 13 is respectively connected with the video decoding module 12, the volatile memory 14 and the video signal output interface 15, and can control the main video signals which are decoded by the video signals and then written into the volatile memory 14 together to be sent to the display screen to be switched into the standby video signals when receiving a trigger instruction of abnormity of the main video signals, and lock the main video signals written into the volatile memory 14 in the switching process.
The video signal transmitting card 1 operates on the following principle: the two paths of the same main video signal and the same standby video signal are decoded by the video decoding module 12 and then are written into the volatile memory 14 for buffering, the controller 13 can send the main video signal in the volatile memory 14 to the display screen through the video signal output interface 15 by default, when the controller 13 receives a trigger instruction that the main video signal fails, the standby video signal in the volatile memory 14 is sent in a switching manner, and in the process of switching the video signals, the controller 13 can lock the main video signal which is written into the volatile memory 14, so that the video signal which is locked in the volatile memory 14 is still sent to the display screen for displaying in the switching process, the situation of display screen flickering or instant black screen cannot occur, and the stability of the video display screen is further improved.
According to the video signal processing method and device, the volatile memory 14 is used for caching the signal to be displayed sent to the display screen, the video signal cached in the volatile memory 14 is locked in the process of switching the main video signal and the standby video signal, it is guaranteed that the normal video signal is sent to the display screen to be displayed in the process of switching the main video signal and the standby video signal, the situation that a display picture flickers or is instantly black in the switching process is avoided, and the picture stability of the display screen is improved.
In some embodiments, please continue to fig. 2, which shows a schematic structural diagram of another video signal transmitting card 1 provided in the embodiments of the present disclosure. As shown in fig. 2, the video signal input interface 11 includes: a first video signal interface 111 for receiving a main-path video signal; the second video signal interface 112 is configured to receive the standby video signal, where the main video signal and the standby video signal are the same video signal.
Specifically, the first video signal interface 111 and the second video signal interface 112 may be the same type of data interface, or may be two different types of data interfaces, which is not limited in the embodiment of the present disclosure. Illustratively, the video signal data interface includes at least one of: s terminal (English: S-Video), VGA (Video Graphics array) interface, DVI (digital Visual interface) interface, HDMI (high Definition Multimedia interface) interface, DP (display Port) interface or SDI (serial digital interface) interface. For example, the first video signal interface 111 is an interface of any of the above types, and similarly, the second video signal interface 112 may also be an interface of any of the above types. In the embodiment of the present disclosure, the first video signal interface 111 and the second video signal interface 112 are the same interface, which includes, but is not limited to, the S terminal, the VGA interface, the DVI interface, the HDMI interface, the DP interface, and the SDI interface described above.
Further, the video decoding module 12 may include one decoding module, or may include two decoding modules.
When video decoding module 12 comprises a decoding module, video decoding module 12 comprises: a first video decoding module 121; the first video decoding module 121 is connected to the first video signal interface 111, the second video signal interface 112, and the controller 13, respectively.
Specifically, the first video decoding module 121 may continuously decode the main video signal and the standby video signal, and one decoding module is adopted, so that the cost of the video signal transmitting card 1 can be further reduced under the condition that the decoding requirement is met.
When video decoding module 12 includes two decoding modules, as shown in fig. 2, video decoding module 12 includes: a first video decoding module 121 and a second video decoding module 122; the first video decoding module 121 is connected to the first video signal interface 111, the second video decoding module 122 is connected to the second video signal interface 112, and the controller 13 is respectively connected to the first video decoding module 121 and the second video decoding module 122.
Specifically, the first video decoding module 121 and the second video decoding module 122 may be configured to decode two paths of the same main video signal and the same standby video signal at the same time, which is beneficial to improving the decoding speed of the two paths of video signals. Illustratively, the first video decoding module 121 is configured to decode a main video signal, the second video decoding module 122 is configured to decode an auxiliary video signal, and the two decoding modules are independent of each other, so that video decoding can be performed simultaneously, and the efficiency of video decoding can be further improved.
In some embodiments, the volatile memory 14 includes dynamic random access memory and static random access memory.
Specifically, the volatile memory 14 is configured to buffer the decoded video signals, that is, the decoded main video signal and the decoded standby video signal are written into the volatile memory 14 together, and then one of the main video signal and the standby video signal is selected and sent to the display screen for displaying under the control of the controller 13. Compared with the mode that the decoded video signals are directly sent to the display screen to be displayed, the buffering and sending are adopted in the embodiment of the disclosure, a preposed buffering space can be provided for video signal switching, and the buffering space can be utilized to enable the video signals still to be normal in the video signal switching process to be sent to the display screen for limitation.
Referring to fig. 3, a schematic structural diagram of another video signal transmitting card 1 provided in the embodiment of the present disclosure is shown. As shown in fig. 3, the embodiment of the present disclosure is different from the embodiment shown in fig. 2 in that: the controller 13 includes a micro control unit 132, a programmable logic device 131, and a non-volatile memory 133, the micro control unit 132 is connected to the programmable logic device 131, and the programmable logic device 131 is connected to the non-volatile memory 133 and the video signal output interface 15, respectively.
Specifically, the controller 13 can control switching between the main video signal and the standby video signal, and control writing and locking of the video signal in the volatile memory 14, which can be implemented as an integrated circuit functional module with a hardware structure by the programmable logic device 131, so as to improve the stability and the anti-interference capability of the video signal transmitting card 1. In the disclosed embodiment, the Programmable logic device 131 is preferably an FPGA (Field Programmable Gate Array).
Specifically, the micro control unit 132 in the embodiment of the present disclosure includes, but is not limited to, a single chip microcomputer and an ARM processor. The non-volatile memory 133 is a flash memory or a read-only memory, and in the embodiment of the present disclosure, the non-volatile memory may be used for storing some initialized programs or data, and the like. Illustratively, the nonvolatile memory 133 is Flash or EEPROM.
Referring to fig. 4, a schematic structural diagram of a video display system provided by the embodiment of the present disclosure is shown. As shown in fig. 4, the video display system includes a video signal transmitting card 1 and at least one display screen 2, wherein each display screen 2 includes a display control module; each display control module in the at least one display screen 2 is connected in parallel with the video signal output interface 15 in the video signal transmitting card 1, respectively.
Specifically, the display screen 2 may be one display screen, or may be formed by splicing a plurality of display screens. When the display screen 2 is a plurality of display screens, the display control module of each display screen is connected in parallel with the video signal output interface 15 of the video signal transmitting card 1, and is used for extracting the video signal displayed in the display screen corresponding to the control in the received video signal so as to perform display control.
For example, the display screen 2 is divided into 4 (certainly, the number may not be this) display areas, each display area may be an independent display screen, or may be a display control area in one display screen, and assuming that the 4 display areas are D1, D2, D3, and D4, respectively, the display control modules in each display area are P1, P2, P3, and P4 in sequence. Then, when the display control module P1 receives the video signal S transmitted by the video signal transmitting card 1, the video signal S1 corresponding to the display in the display area D1 in the video signal S is extracted for display; when the display control module P2 receives the video signal S transmitted by the video signal transmitting card 1, the video signal S2 corresponding to the display in the display area D2 in the video signal S is extracted for display; when the display control module P3 receives the video signal S transmitted by the video signal transmitting card 1, the video signal S3 corresponding to the display in the display area D3 in the video signal S is extracted for display; when the display control module P4 receives the video signal S transmitted from the video signal transmitting card 1, the video signal S4 corresponding to the display in the display area D4 in the video signal S is extracted for display. Specifically, the video signal D may be a frame image signal, and the video signals S1, S2, S3 and S4 respectively correspond to 4 image area scanning signals in the frame image.
Specifically, in the embodiment of the present disclosure, the video signal output interface 15 in the video signal transmitting card 1 may be a flat cable socket for parallel connection with different display screens, and the display screen 2 may be an LED display screen or an OLED display screen.
The embodiment of the disclosure realizes the stability of the display picture in the display screen by applying the video signal transmitting card 1 to the video display system, and the condition of display picture flickering or instant screen blacking can not occur in the process of switching the main video signal and the standby video signal.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A video signal transmitting card, comprising:
a video decoding module;
a volatile memory;
the video signal output interface is used for being connected with a display screen;
the video signal input interface is used for receiving two paths of the same main path video signals and standby path video signals;
and the controller is respectively connected with the video decoding module, the volatile memory and the video signal output interface, and can control the main path video signal which is decoded and then written into the volatile memory together to be sent to the display screen to be switched into the standby path video signal when receiving a trigger instruction that the main path video signal is abnormal, and lock the main path video signal written into the volatile memory in the switching process.
2. The video signal transmitting card according to claim 1, wherein the video signal input interface comprises:
a first video signal interface for receiving a main path video signal;
and the second video signal interface is used for receiving a standby video signal, and the main video signal and the standby video signal are the same video signal.
3. The video signal transmitting card according to claim 2, wherein the video decoding module comprises: a first video decoding module;
the first video decoding module is respectively connected with the first video signal interface, the second video signal interface and the controller.
4. The video signal transmitting card according to claim 2, wherein the video decoding module comprises: the video decoding device comprises a first video decoding module and a second video decoding module;
the first video decoding module is connected with the first video signal interface, the second video decoding module is connected with the second video signal interface, and the controller is respectively connected with the first video decoding module and the second video decoding module.
5. The video signal transmitting card according to claim 1, wherein the video signal input interface includes an S terminal, a VGA interface, a DVI interface, an HDMI interface, a DP interface, and an SDI interface.
6. The video signal transmitting card of claim 1, wherein the volatile memory includes a dynamic random access memory and a static random access memory.
7. The video signal transmitting card according to any one of claims 1 to 6, wherein said controller comprises a micro control unit, a programmable logic device and a non-volatile memory, said micro control unit is connected to said programmable logic device, and said programmable logic device is connected to said non-volatile memory and said video signal output interface, respectively.
8. The video signal transmitting card according to claim 7, wherein the programmable logic device is an FPGA.
9. The video signal transmitting card according to claim 7, wherein the nonvolatile memory is a flash memory or a read only memory.
10. A video display system, comprising:
the video signal transmitting card according to any one of claims 1 to 9;
at least one display screen, each display screen comprising a display control module;
and the display control module of the at least one display screen is respectively connected with the video signal output interface in the video signal transmitting card in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122994277.9U CN216391221U (en) | 2021-12-01 | 2021-12-01 | Video signal transmitting card and video display system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122994277.9U CN216391221U (en) | 2021-12-01 | 2021-12-01 | Video signal transmitting card and video display system |
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| Publication Number | Publication Date |
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| CN216391221U true CN216391221U (en) | 2022-04-26 |
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| CN202122994277.9U Active CN216391221U (en) | 2021-12-01 | 2021-12-01 | Video signal transmitting card and video display system |
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Effective date of registration: 20231205 Address after: Room 2-5, 2nd Floor, Building 3, No. 58 Jinghai Fifth Road, Beijing Economic and Technological Development Zone, Daxing District, Beijing 102600 Patentee after: Beijing Yimei Chuangyan Technology Co.,Ltd. Address before: 100176 floor 3, building 3, yard 58, Jinghai fifth road, Beijing Economic and Technological Development Zone, Daxing District, Beijing Patentee before: Beijing Yimei New Technology Co.,Ltd. |
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