WO2021092827A1

WO2021092827A1 - Video signal black-screen-free switching processing method and device

Info

Publication number: WO2021092827A1
Application number: PCT/CN2019/118319
Authority: WO
Inventors: 贾正东
Original assignee: 深圳爱特天翔科技有限公司
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2021-05-20
Also published as: CN110999275A; CN110999275B

Abstract

A video signal black-screen-free switching processing method, which comprises: receiving a video signal; performing time sequence monitoring on the received signal according to the current application configuration and the EDID information of a rear-end display device; locking an output picture when an input time sequence is monitored to change, thereby achieving the effect of locking the last frame picture when the signal is lost or switched; performing image resolution conversion according to the configured resolution when the input time sequence is monitored to be stable; and displaying the image after resolution conversion. The seamless switching is combined with advanced image resolution conversion technology, which can provide switching actions without black screen, screen turn-off and flicker during video signal switching, and meet the requirements of high-quality, high-resolution video presentations.

Description

Method and device for processing video signal without black screen switching

Technical field

The invention relates to the technical field of multimedia conferences, in particular to a method and device for processing video signals without black screen switching.

Background technique

With the popularization and improvement of computer-centric multimedia technology, visual information technology has been widely used in the conference field, and multimedia conferences have been rapidly popularized with their diverse functions.

In the multimedia conference system, the matrix and switcher are the core equipment for signal circulation. All input and output signals of the system enter and exit from the matrix and switcher, and enter the designated output terminal from the input end according to the operator's design.

technical problem

Due to the diversity of signals in the system, when input signals of different formats and resolutions are switched to the output terminal for display, the display device will have a black screen, off screen or flicker, which affects the effect and experience of the entire multimedia conference, and cannot meet high requirements. Quality output requirements.

Technical solutions

The present invention provides a method and device for processing video signals without black screen switching, so as to solve at least one of the above technical problems.

In order to solve the above problems, as an aspect of the present invention, a method for processing a video signal without black screen switching is provided, which includes: receiving a video signal; timing the received signal according to the current application configuration and the EDID information of the back-end display device Monitoring; when the input timing is monitored, the output screen is locked, and the effect of locking the last frame of the screen when the signal is lost or switched; when the input timing is monitored to be stable, the image resolution conversion is performed according to the configured resolution; Display the image after resolution conversion.

Preferably, the method further includes: receiving and storing image data to be output, so as to freely adjust the number of stored picture frames to be output according to the configuration of the application.

Preferably, the method further includes: reading the image after resolution conversion, and generating the final output timing according to the pre-configured timing, supporting multiple output timings such as 4K@60HZ, 720P, 1080P, WUXGA, etc.

Preferably, the black-screen switching processing method of the video signal can be designed into the output circuit of the matrix and the switcher, or designed as a separate processing device connected to the output terminal of the matrix and the switcher.

The present invention also provides a video signal non-black screen switching processing device, including:

Signal receiving module for receiving video signals;

The MCU module is used to perform timing monitoring and timing generation control on the received signals according to the current application configuration and the EDID information of the back-end display device;

Timing monitoring module, used to lock the output screen when the input timing is detected to change, and then to achieve the effect of locking the last frame of the picture when the signal is lost or switched, and used to zoom to the following image when the input timing is stable. Output image data;

An image scaling module, configured to receive image data from the timing monitoring module, and perform image resolution conversion according to the configured resolution;

The signal sending module is used to send the image after resolution conversion to the display device.

Preferably, it further includes: a to-be-output image processing module for receiving and storing image data to be output, so as to freely adjust the number of stored image frames to be output according to the configuration of the application.

Preferably, it further includes: a timing generation module for reading the image after resolution conversion, and generating the final output timing according to the pre-configured timing, supporting multiple output timings such as 4K@60HZ, 720P, 1080P, WUXGA, etc. .

Preferably, the video signal non-black screen switching processing device is built into the output circuit of the matrix and the switcher, or as a separate processor, is connected to the output terminal of the matrix and the switcher.

Beneficial effect

Due to the above technical scheme, the present invention can combine seamless switching with advanced image resolution conversion technology, and can provide switching actions without black screen, no screen off, and no flicker during video signal switching, which meets the requirements of high quality and high resolution. Rate the demand for video presentations. In addition, if the EDID of the display device cannot support the current input signal resolution, the image resolution can also be converted through the non-black screen switching processor, and converted to a supported resolution output.

Description of the drawings

Fig. 1 schematically shows a flow chart of the present invention.

Embodiments of the present invention

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

In order to solve the problem of black screen, screen off, and flicker during signal switching, the present invention proposes a method and device for realizing signal switching without black screen, which can be built into the output circuit of matrix and switcher to realize signal switching without black screen Processing; can also be used as a separate processor, connected to the output of the matrix and switcher, to achieve no black screen, no extinguishing, and no flicker during the signal switching process, which can meet the high-quality output of multimedia conferences, command centers, video surveillance, teaching and other fields Requirements.

The principle of the present invention is to combine seamless switching with advanced image resolution conversion technology to realize that the matrix and switcher have no black screen, no screen off, and no flicker during the signal switching process, and meet the needs of high-quality, high-resolution video presentations. .

Example one:

The present invention provides a method for realizing signal switching without black screen. The method can be applied to a separate processor designed to be externally connected to the output back end of the matrix and switcher; it can also be built into the output circuit of the matrix and switcher. Realize the signal switching processing without black screen, including: receiving video signals; monitoring the received signal timing according to the current application configuration and the EDID information of the back-end display device; when monitoring the input timing changes, locking the output screen, and then Realize the effect of locking the last frame of the picture when the signal is lost or switched; when the input timing is monitored to be stable, the image resolution conversion is performed according to the configured resolution; the image after the resolution conversion is displayed.

Embodiment two:

The present invention also provides a device for realizing the method, which belongs to a new type of application in the video matrix switching system, which can provide switching actions without black screen, no screen off, and no flicker during video signal switching, and meets the requirements of high quality and high Resolution video presentation requirements.

The device is equipped with signal receiving module, image resolution conversion processing module (including timing monitoring, image scaling, image to be output, timing generation), signal sending module and MCU control module, including at least 2 physical interfaces: 1 video signal input Interface, 1 video signal output interface.

The output terminal of the matrix and switcher is connected to the input interface of the non-black screen switching processing device, and the input supports the VESA mainstream resolution standard, up to 4K@60Hz; the display device (such as monitor, projector, etc.) is connected to the output interface of the non-black screen switching processing device , The output supports 4K@60Hz, 720P, 1080P, WUXGA, etc., adapted to the best resolution of the display device.

When the matrix and switcher are switching signals of different formats and resolutions, the switching processing equipment without black screen detects that the input signal sequence has changed, and immediately locks the output screen, so as to lock the last frame of the screen when the signal is lost or switched. Effect: When the device monitors that the input timing is stable, it performs image resolution conversion processing on the input signal, and finally generates the timing required by the application configuration, and the output signal is sent to the display device (support 4K@60Hz, 720P, 1080P, WUXGA, etc.) Output sequence), the whole process has no black screen, no flicker, and fast switching in an instant.

In a specific embodiment, the video signal non-black screen switching processing device includes:

The signal receiving module is used to receive video signals, and can receive signals output by various types of matrixes, switchers, and multimedia program sources. It supports VESA mainstream resolution standards and supports up to 4K@60Hz;

The timing monitoring module is used to monitor the timing of the received signal. When the input timing is monitored, it will immediately notify the "image to be output" module to lock the output screen, so as to lock the last frame of the screen when the signal is lost or switched effect. When it is monitored that the input timing is stable, the image data is output to the image scaling module.

The image scaling module is used to receive the image data from the timing monitoring module, perform image resolution conversion according to the resolution configured by the MCU control module (that is, perform image scaling processing at the specified resolution), and output the converted image data to the Output image module;

The to-be-output image processing module is used to receive and store the image data to be output, and freely adjust the number of stored frames to be output according to the application configuration to ensure that the output screen can be "perfectly locked" under various conditions.

Timing generation module reads image data from the "image module to be output", generates the final output timing according to the timing configured by the MCU control module, and sends it to the signal sending module. It supports 4K@60HZ, 720P, 1080P, WUXGA and other output timings .

The signal sending module is used to send the image after resolution conversion to the display device. The display device includes various multimedia display terminals (such as projectors, TVs, monitors, etc.).

The above descriptions are only preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

A video signal switching processing method without black screen, which is characterized in that it comprises:

Receive video signal;

Perform timing monitoring of the received signal according to the current application configuration and the EDID information of the back-end display device;

When monitoring the input timing changes, lock the output screen, and then achieve the effect of locking the last frame of the screen when the signal is lost or switched;

When it is monitored that the input timing is stable, the image resolution conversion is performed according to the configured resolution;

Display the image after resolution conversion.
The method according to claim 1, further comprising: receiving and storing image data to be output, so as to freely adjust the number of stored picture frames to be output according to the configuration of the application.
The method according to claim 1, further comprising: reading the image after resolution conversion, and generating the final output timing according to the pre-configured timing, supporting 4K@60HZ, 720P, 1080P, WUXGA, etc. Various output timings.
The method according to claim 1, characterized in that the video signal no black screen switching processing method can be designed into the output circuit of the matrix and the switcher, or designed as a separate processing device connected to the output terminal of the matrix and the switcher .
A video signal switching processing device without black screen, which is characterized in that it comprises:

Signal receiving module for receiving video signals;

The MCU module is used to perform timing monitoring and timing generation control on the received signals according to the current application configuration and the EDID information of the back-end display device;

Timing monitoring module, used to lock the output screen when the input timing is detected to change, and then to achieve the effect of locking the last frame of the picture when the signal is lost or switched, and used to zoom to the following image when the input timing is stable. Output image data;

An image scaling module, configured to receive image data from the timing monitoring module, and perform image resolution conversion according to the configured resolution;

The signal sending module is used to send the image after resolution conversion to the display device.
The video signal non-black screen switching processing device according to claim 5, further comprising: an image processing module to be output, configured to receive and store image data to be output, so as to freely adjust the stored image data to be output according to the configuration of the application The number of picture frames.
The video signal non-black screen switching processing device according to claim 5, further comprising: a timing generation module for reading the image after resolution conversion, and generating the final output timing according to a pre-configured timing , Support 4K@60HZ, 720P, 1080P, WUXGA and other output timings.
The video signal non-black screen switching processing device according to claim 5, wherein the video signal non-black screen switching processing device is built into the output circuit of the matrix and the switcher, or as a separate processor externally connected to the matrix and the switch The output terminal of the device.