CN110999275B - Video signal non-black screen switching processing method and device - Google Patents
Video signal non-black screen switching processing method and device Download PDFInfo
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- CN110999275B CN110999275B CN201980002420.4A CN201980002420A CN110999275B CN 110999275 B CN110999275 B CN 110999275B CN 201980002420 A CN201980002420 A CN 201980002420A CN 110999275 B CN110999275 B CN 110999275B
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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
Abstract
The invention provides a video signal non-black screen switching processing method, which comprises the following steps: receiving a video signal; carrying out time sequence monitoring on the received signals according to the current application configuration and EDID information of the rear-end display equipment; when the input time sequence is monitored to change, the output picture is locked, and the effect of locking the last frame of picture when the signal is lost or switched is further realized; when the input time sequence is monitored to be stable, image resolution conversion is carried out according to the configured resolution; and displaying the image after the resolution conversion. The invention can combine seamless switching and advanced image resolution conversion technology, can provide switching actions without black screen, off screen and flicker during video signal switching, and meets the requirements of high-quality and high-resolution video demonstration.
Description
Technical Field
The invention relates to the technical field of multimedia conferences, in particular to a method and a device for switching and processing video signals without black screens.
Background
With the popularization and improvement of computer-centered multimedia technologies, visual information technologies are widely applied in the conference field, and multimedia conferences are rapidly popularized with their diverse functionalities.
In the multimedia conference system, a matrix and a switcher are core devices for signal circulation, and all input and output signals of the system enter and exit in the matrix and the switcher and enter a designated output end from an input end according to the design of an operator.
Due to the diversity of signals in the system, when input signals with different formats and different resolutions are switched to the output end for display, the display equipment can have the phenomena of screen blacking, screen extinguishing or flickering, the effect and experience degree of the whole multimedia conference are influenced, and the requirement of high-quality output cannot be met.
Disclosure of Invention
The invention provides a video signal non-black screen switching processing method and device, and aims to solve at least one technical problem.
To solve the above problem, as an aspect of the present invention, there is provided a video signal non-black screen switching processing method, including: receiving a video signal; carrying out time sequence monitoring on the received signals according to the current application configuration and EDID information of the rear-end display equipment; when the input time sequence is monitored to change, the output picture is locked, and the effect of locking the last frame of picture when the signal is lost or switched is further realized; when the input time sequence is monitored to be stable, image resolution conversion is carried out according to the configured resolution; and displaying the image after the resolution conversion.
Preferably, the method further comprises the following steps: receiving and storing image data to be output so as to freely adjust the number of stored frames of pictures to be output according to application configuration conditions.
Preferably, the method further comprises the following steps: reading the image after resolution conversion, generating a final output sequence according to a preset sequence, and supporting various output sequences such as 4K @60HZ, 720P, 1080P, WUXGA and the like.
Preferably, the video signal no-black-screen switching processing method can be designed into the output circuit of the matrix and the switcher, or a separate processing device is designed to be externally connected to the output end of the matrix and the switcher.
The invention also provides a video signal non-black screen switching processing device, which comprises:
the signal receiving module is used for receiving a video signal;
the MCU module is used for carrying out time sequence monitoring and time sequence generation control on the received signals according to the current application configuration and EDID information of the rear-end display equipment;
the time sequence monitoring module is used for locking an output picture when monitoring that the input time sequence changes so as to realize the effect of locking the last frame picture when a signal is lost or switched, and is used for outputting image data to the following image zooming module when monitoring that the input time sequence is stable;
the image scaling module is used for receiving the image data from the time sequence monitoring module and performing image resolution conversion according to the configured resolution;
and the signal sending module is used for sending the image after resolution conversion to the display equipment.
Preferably, the method further comprises the following steps: and the image processing module to be output is used for receiving and storing image data to be output so as to freely adjust the frame number of stored images to be output according to the application configuration condition.
Preferably, the method further comprises the following steps: and the time sequence generating module is used for reading the image after resolution conversion, generating a final output time sequence according to a preset time sequence, and supporting various output time sequences such as 4K @60HZ, 720P, 1080P, WUXGA and the like.
Preferably, the video signal non-black screen switching processing device is built in an output circuit of the matrix and the switch or is externally connected to an output end of the matrix and the switch as a separate processor.
By adopting the technical scheme, the invention can combine seamless switching with advanced image resolution conversion technology, can provide switching actions without black screen, screen off and flicker during video signal switching, and meets the requirements of high-quality and high-resolution video demonstration. In addition, if the EDID of the display device can not support the current input signal resolution, the image resolution can be converted into the supportable resolution through the non-black screen switching processor and then output.
Drawings
Fig. 1 schematically shows a flow chart of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
In order to solve the problems of black screen, screen off and flicker during signal switching, the invention provides a method and equipment for realizing signal non-black screen switching processing, which can be built in an output circuit of a matrix and a switcher to realize signal non-black screen switching processing; the intelligent switching device can be used as an independent processor and is externally connected to the output ends of the matrix and the switcher, so that the signal switching process is free of black screen, extinguishment and flicker, and the requirements of the fields of multimedia conferences, command centers, video monitoring, teaching and the like on high-quality output are met.
The principle of the invention is to combine seamless switching and advanced image resolution conversion technology, so that the matrix and the switcher have no black screen, no screen off and no flicker in the signal switching process, and the requirements of high-quality and high-resolution video demonstration are met.
The first embodiment is as follows:
the invention provides a method for realizing the switching processing of the signal without the black screen, which can be applied to a processor which is designed to be independent and is externally connected to the matrix and the output rear end of a switcher; the method can also be built in the output circuit of the matrix and the switcher to realize the signal non-black screen switching process, and comprises the following steps: receiving a video signal; carrying out time sequence monitoring on the received signals according to the current application configuration and EDID information of the rear-end display equipment; when the input time sequence is monitored to change, the output picture is locked, and the effect of locking the last frame of picture when the signal is lost or switched is further realized; when the input time sequence is monitored to be stable, image resolution conversion is carried out according to the configured resolution; and displaying the image after the resolution conversion.
Example two:
the invention also provides equipment for realizing the method, belongs to a novel application in a video matrix switching system, can provide switching actions without black screen, screen off and flicker during video signal switching, and meets the requirements of high-quality and high-resolution video demonstration.
The equipment is provided with a signal receiving module, an image resolution conversion processing module (comprising time sequence monitoring, image zooming, images to be output and time sequence generation), a signal sending module and an MCU control module, and comprises at least 2 physical interfaces: 1 video signal input interface and 1 video signal output interface.
The output ends of the matrix and the switcher are connected with an input interface of the non-black screen switching processing equipment, and the input supports VESA mainstream resolution standard with highest support of 4K @60Hz; the display device (such as a display, a projector and the like) is connected with an output interface of the non-black screen switching processing device, outputs support of 4K @60Hz, 720P, 1080P, WUXGA and the like, and adapts to the optimal resolution of the display device.
When the matrix and the switcher switch signals with different formats and different resolutions, the non-black screen switching processing equipment monitors that the time sequence of the input signal is changed, and immediately locks an output picture, thereby realizing the effect of locking the last frame picture when the signal is lost or switched; when the equipment monitors that the input time sequence is stable, the equipment carries out image resolution conversion processing on the input signals, finally generates the time sequence required by application configuration, outputs the signals to the display equipment (supporting various output time sequences such as 4K @60Hz, 720P, 1080P, WUXGA and the like), and has no black screen, no flicker and instant fast switching in the whole process.
In a specific embodiment, the video signal non-black screen switching processing device comprises:
a signal receiving module, which is used for receiving video signals, receiving signals output by various matrixes, switchers and multimedia program sources), supporting VESA mainstream resolution standard and supporting 4K @60Hz to the maximum;
the MCU module is used for carrying out time sequence monitoring and time sequence generation control on the received signals according to the current application configuration and EDID information of the rear-end display equipment;
and the time sequence monitoring module is used for carrying out time sequence monitoring on the received signals, and immediately informing the image to be output module to lock an output image when monitoring that the input time sequence changes, so that the effect of locking the last frame of image when the signals are lost or switched is realized. And when the input time sequence is stable, outputting image data to the image scaling module.
The image scaling module is used for receiving the image data from the time sequence monitoring module, performing image resolution conversion (namely performing image scaling processing according to the specified resolution) according to the resolution configured by the MCU control module, and outputting the converted image data to the image module to be output;
and the image processing module to be output is used for receiving and storing image data to be output, and freely adjusting the number of frames of the stored image to be output according to the application configuration condition, so as to ensure that the perfect locking of the output image can be realized under various conditions.
And the time sequence generation module reads image data from the image module to be output, generates a final output time sequence according to the time sequence configured by the MCU control module, and transmits the final output time sequence to the signal transmission module to support various output time sequences such as 4K @60HZ, 720P, 1080P, WUXGA and the like.
And the signal sending module is used for sending the image after resolution conversion to display equipment, and the display equipment comprises various multimedia display terminals (such as a projector, a television, a display and the like).
By adopting the technical scheme, the invention can combine seamless switching with advanced image resolution conversion technology, can provide switching actions without black screen, off screen and flicker during video signal switching, and meets the requirements of high-quality and high-resolution video demonstration. In addition, if the EDID of the display device can not support the current input signal resolution, the image resolution can be converted into the supportable resolution through the non-black screen switching processor and then output.
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.
Claims (6)
1. A video signal non-black screen switching processing method is characterized by comprising the following steps:
step 1, receiving a video signal;
step 2, carrying out time sequence monitoring control and time sequence generation control on the received video signals according to the current application configuration and EDID information of the display equipment;
step 3, carrying out time sequence monitoring on the received video signals, and locking an output picture when monitoring that the input time sequence changes, thereby realizing the effect of locking a last frame of picture when the video signals are switched;
step 4, when the stability of the input time sequence is monitored, image resolution conversion is carried out according to the configured resolution;
and step 5, sending the image converted in the step 4 to a display device, and displaying the image after resolution conversion on the display device, wherein the processing method is built in an output circuit of the matrix and the switcher or used as a separate processor to be externally connected with the output end of the matrix and the switcher so as to realize that the matrix and the switcher have no black screen or flicker in the video signal switching process.
2. The method of claim 1, further comprising, after step 4, step a: the image data converted in step 4 is received and stored to freely adjust the number of stored picture frames to be output to the display apparatus according to the application configuration.
3. The method of claim 2, further comprising, after step a, step b: reading the image output in the step a, generating a final output sequence according to a preset sequence, and providing the final output sequence to the step 5, wherein the output sequence supports a plurality of output sequences of 4K @60HZ, 720P, 1080P or WUXGA.
4. A video signal non-blank screen switching processing apparatus, comprising:
the signal receiving module is used for receiving a video signal;
the MCU control module is used for carrying out time sequence monitoring control and time sequence generation control on the received video signals according to the current application configuration and EDID information of the display equipment;
the time sequence monitoring module is used for carrying out time sequence monitoring on the received video signals, locking an output picture when monitoring that the input time sequence changes so as to realize the effect of locking the last frame picture when the video signals are switched, and outputting image data to the image zooming module when monitoring that the input time sequence is stable;
the image scaling module is used for receiving the image data from the time sequence monitoring module and performing image resolution conversion according to the configured resolution;
and the signal sending module is used for sending the image after resolution conversion to the display equipment, and the video signal non-black screen switching processing device is built in an output circuit of the matrix and the switcher or is externally connected to the output ends of the matrix and the switcher as a separate processor so as to realize that the matrix and the switcher have no black screen or flicker in the video signal switching process.
5. The video signal no-black-screen switching processing device according to claim 4, further comprising: and the image processing module to be output is used for receiving and storing the image data converted by the image scaling module so as to freely adjust the number of the stored frames to be output to the display equipment according to the application configuration.
6. The apparatus for processing black screen free switching of a video signal according to claim 5, further comprising: and the time sequence generating module is used for reading the image output by the image processing module to be output, generating a final output time sequence according to a pre-configured time sequence and providing the final output time sequence to the signal transmitting module, and supports various output time sequences of 4K @60HZ, 720P, 1080P or WUXGA.
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2019/118319 WO2021092827A1 (en) | 2019-11-14 | 2019-11-14 | Video signal black-screen-free switching processing method and device |
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| CN110999275A CN110999275A (en) | 2020-04-10 |
| CN110999275B true CN110999275B (en) | 2023-02-28 |
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| CN111611041B (en) * | 2020-05-22 | 2022-10-18 | 冠捷电子科技(福建)有限公司 | Method for quickly switching window and game picture |
| CN111696477B (en) * | 2020-06-03 | 2021-05-18 | 康佳集团股份有限公司 | Display control method of ultra-high definition television and 8K ultra-high definition television |
| CN111956920A (en) * | 2020-06-05 | 2020-11-20 | 北京无线电测量研究所 | Breathing machine display device, equipment and breathing machine |
| CN112135007B (en) * | 2020-08-25 | 2023-04-18 | 惠州华阳通用电子有限公司 | Streaming media visual angle switching method and system |
| CN112130796B (en) * | 2020-09-22 | 2023-12-12 | 北京计算机技术及应用研究所 | Kvm switching system and method suitable for strengthening multi-unit server |
| CN112367556A (en) * | 2020-11-02 | 2021-02-12 | 广州朗国电子科技有限公司 | Method, device and system for automatically adjusting output picture of signal source |
| CN114567802B (en) * | 2021-12-29 | 2024-02-09 | 沈阳中科创达软件有限公司 | Data display method and device |
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| WO2021092827A1 (en) | 2021-05-20 |
| CN110999275A (en) | 2020-04-10 |
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