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A seamless switching system and method for ensuring normal broadcasting of video and audio

A seamless switching, video and audio technology, applied in image communication, selective content distribution, electrical components, etc., can solve problems such as flickering and green screen

Active Publication Date: 2017-03-01
BEIJING DAYANG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems in the prior art, the present invention proposes a seamless switching system and method to ensure normal broadcasting of video and audio. Flickering, green screen and other problems caused by it can quickly and seamlessly switch the backup broadcast signal to the signal output port of the broadcast system without manual intervention, so as to realize the smoothness of the entire broadcast process. stable and safe

Method used

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  • A seamless switching system and method for ensuring normal broadcasting of video and audio
  • A seamless switching system and method for ensuring normal broadcasting of video and audio
  • A seamless switching system and method for ensuring normal broadcasting of video and audio

Examples

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Embodiment 1

[0056] This embodiment provides a seamless switching system and method for ensuring normal broadcasting of video and audio.

[0057] The main idea of ​​this embodiment is to set up two video and audio broadcasting servers that are standby for each other. The main functions of the video and audio broadcast servers that are mutually active and standby are: no matter which server is selected by the switcher, when this server cannot broadcast normally for some reason, the server can be established on the video and audio I / O board. The hardware watchdog, the onboard signal switcher, and the software watchdog, these three fault detection devices, perform three-level detection to detect accidents in real time and implement protection operations, and use the standby broadcast signal provided by another normal broadcast server to broadcast. When the maintenance personnel need to repair the problem server, they can switch the broadcast signal to the signal main output port of another n...

Embodiment 2

[0115] This embodiment is a refinement of a seamless handover system in the embodiment, including:

[0116] The board driver creates two video and audio buffer queues in the board hardware buffer area: the broadcast queue and the collection queue. The broadcast queue is used to store the video and audio data sent by the video and audio broadcast application program, and the collection queue is used for Store the backup broadcast video and audio data collected by the signal input interface. The number of units in the two queues is the same, the size of the units is fixed and equal, and each unit can store video and audio data in units of 1 frame; the number of units in the queue is greater than 2.

[0117] Use 7 board hardware registers to respectively record the storage start address of the acquisition queue in the board hardware buffer area, the size of the buffer queue unit, the number of buffer queue units, and the cyclic storage of 1-frame backup broadcast data currently c...

Embodiment 3

[0121] This embodiment is a refinement of a seamless handover method in the embodiment, including:

[0122] Initialization steps:

[0123] (1) The video and audio I / O board driver first sets the board seamless switching flag to FALSE;

[0124]The board seamless switching flag is embodied as a one-bit register of the video and audio I / O board, which can be set by the board driver and the hardware watchdog, and can be read by the hardware control module. When this register is set to FALSE, it means that the video and audio broadcast server is operating normally. Once this register is set to TRUE, it means that there is some accident that causes the video and audio broadcast server to fail to work normally. Out signal connection output.

[0125] (2) The video and audio I / O board driver creates two video and audio Buffer queues in the board hardware buffer area, which are recycled: APP_List and CAP_List, among which the cache queue APP_List is used to store video and audio playb...

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Abstract

The invention relates to a seamless switching system and a seamless switching method for ensuring normal broadcast of audio. The seamless switching system for ensuring the normal broadcast of audio comprises two video and audio broadcast servers, wherein the video and audio broadcast server comprises a video and audio I / O (Input / Output) board card, a board card drive program, a fault detecting device, an operating system and a video and audio broadcast application program; the video and audio I / O board card comprises a board card hardware buffer cache, a board card hardware register, a board card hardware control module, a signal input interface, a signal main output port and a signal spare output port. According to the seamless switching system and the seamless switching method for ensuring normal broadcast of audio, the switching is performed in video frames, the accuracy of switching frame can be accurately controlled, when in switching period, the signal is broadcasted without appearance of green screen and flickering, repeated frames or frame skipping does not appear, and thus the seamless switching of the spare broadcast signal when a fault appears is achieved.

Description

technical field [0001] The invention relates to a seamless switching system and method for ensuring normal broadcasting of video and audio, which is a digital processing technology, a method for computer video processing, and a broadcasting system for ensuring normal broadcasting of video and audio and protection methods. Background technique [0002] When the TV station is broadcasting normally, the broadcasting signal is often interrupted suddenly for some reason. With traditional TV broadcast equipment, the most common cause of this is a power outage. The solution is also relatively simple. You can use a backup power supply or a set of backup studio equipment powered by another power supply. Once the power is cut off, switch the power supply or switch to the backup studio equipment. With the digitalization of TV broadcasting equipment, computers have become the protagonists of broadcasting equipment, and the reasons for the sudden interruption of broadcasting signals on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/21H04N21/24
Inventor 邓伟王雨刘强孔鑫王琪
Owner BEIJING DAYANG TECH DEV
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