Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Video signal seamless low-delay switching method and system

A video signal, seamless low-latency technology, applied in the field of communication, can solve the problems of different phases, black screen, blurry screen, etc., to achieve the effect of low-latency transmission and good user experience

Active Publication Date: 2020-02-28
广东魅视科技股份有限公司
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When different screens are switched, due to the difference in speed, the phases are also different. Buffering several frames for frame rate and speed adaptation can solve the problem of blurred and black screens before and after signal switching, but the delay is several frames, which is required in many transmission systems. Extremely low occasions cannot meet the requirements, and direct switching will cause problems of blurred and black screens

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Video signal seamless low-delay switching method and system
  • Video signal seamless low-delay switching method and system
  • Video signal seamless low-delay switching method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] Such as figure 1 Shown is a flow chart of a video signal seamless low-latency switching method according to an embodiment of the present invention, and the method includes the following steps.

[0032] S1. The first FPGA receiving module normally outputs the video picture of the first video input signal to the first terminal display device.

[0033] S2. The first FPGA receiving module receives a video input signal switching instruction.

[00...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a video signal seamless low-delay switching method and system. The method mainly comprises the following steps thatafter receiving a video input signal switching instruction, afirst FPGA receiving module continues to receive the last frame of video image of the first video input signal and caches the last frame of video image to the DDR module; then, the video input signalswitching instruction is sent to an MCU module to serve as a video input signal switching ready instruction; and the MCU module receives the video input signal switching ready instruction, immediately switches the video picture of the second video input signal to the first FPGA receiving module after receiving the video input signal switching ready instruction, and continuously outputs the last frame of video picture of the first video input signal until the second video input signal is ready. The system is composed of a video input signal, an FPGA sending module, an optical switching matrixmodule, an FPGA receiving module and a terminal display device. According to the method and the system, seamless and low-delay transmission of the video signals is realized, and better user experienceis brought.

Description

technical field [0001] The present invention relates to the communication field, in particular to a video signal seamless low-delay switching method and system. Background technique [0002] In the process of video signal transmission, different video sources use their own independent clocks and independent sending timings, so different video signals have inconsistent frame phases and clock speeds. When different screens are switched, due to the difference in speed, the phases are also different. Buffering several frames for frame rate and speed adaptation can solve the problem of blurry and black screens before and after signal switching, but the delay is several frames, which is required in many transmission systems. Extremely low occasions cannot meet the requirements, and direct switching will cause problems of blurred and black screens. [0003] Therefore, there is an urgent need for a method and system for seamless and low-delay switching of video signals to solve the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/268H04N7/18
CPCH04N5/268H04N7/18
Inventor 方华
Owner 广东魅视科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com