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

A technology of a video signal and a processing device, which is applied in the field of video signal switching without black screen, can solve the problems of black screen, off screen or flicker of display equipment, affecting the effect and experience of multimedia conferences, and inability to meet high-quality output. quality effect

Active Publication Date: 2020-04-10
ATEL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]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 appear black, off or flickering. Phenomenon, affecting the effect and experience of the entire multimedia conference, unable to meet the requirements of high-quality output

Method used

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

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Embodiment 1

[0025] The invention provides a method for realizing signal switching processing without black screen, which can be applied to design a separate processor, externally connected to the output rear end of the matrix and the switcher; it can also be built into the output circuit of the matrix and the switcher, Realize signal switching processing without black screen, including: receiving video signals; timing monitoring of the received signals according to the current application configuration and EDID information of the back-end display device; when the input timing changes are detected, the output screen is locked, and then Realize the effect of locking the last frame when the signal is lost or switched; when the input timing is detected to be stable, perform image resolution conversion according to the configured resolution; display the image after resolution conversion.

Embodiment 2

[0027] The present invention also provides a device for implementing the method, which belongs to a new type of application in the video matrix switching system, and can provide switching actions without black screen, screen off, and flickering when switching video signals, satisfying high-quality, high-quality resolution video presentation needs.

[0028] The device is equipped with a signal receiving module, an image resolution conversion processing module (including timing monitoring, image scaling, output images, and timing generation), a signal sending module and an MCU control module, including at least 2 physical interfaces: 1 video signal input Interface, 1 video signal output interface.

[0029] The output terminals of the matrix and the switcher are connected to the input interface of the non-black screen switching processing device, and the input supports VESA mainstream resolution standards, up to 4K@60Hz; the display device (such as a monitor, projector, etc.) is ...

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Abstract

The invention provides a video signal black-screen-free switching processing method. The method comprises the following steps: receiving a video signal; performing time sequence monitoring on the received signals according to the current application configuration and the EDID information of the rear-end display device; when it is monitored that the input time sequence is changed, the output picture is locked, and then the effect of locking the last frame of picture when the signal is lost or switched is achieved; when it is monitored that the input time sequence is stable, image resolution conversion is conducted according to the configured resolution; and displaying the image after resolution conversion. According to the invention, seamless switching and advanced image resolution conversion technologies can be combined, switching actions without black screen, screen turn-off and flicker can be provided during video signal switching, and the requirements of high-quality and high-resolution video demonstration are met.

Description

technical field [0001] The invention relates to the technical field of multimedia conferencing, in particular to a method and device for switching a video signal without a black screen. Background technique [0002] With the popularization and improvement of computer-centered multimedia technology, visual information technology has been widely used in the field of conferences, and multimedia conferences have been rapidly popularized due to their various functions. [0003] 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 in the matrix and switcher, and enter the designated output terminal from the input terminal according to the operator's design. [0004] 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 appear black screen, off screen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/268
CPCH04N5/268
Inventor 贾正东
Owner ATEL TECH CO LTD
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