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

Audio mixing method in multiple-MCU video conference system

A video conferencing system and sound mixing technology, which is applied to video conferencing systems, two-way working systems, etc., can solve the problems of system unavailability, large audio delay, and high computational complexity, so as to avoid system unavailability and improve transmission delay. Effect

Inactive Publication Date: 2009-07-08
BEIHANG UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are two main problems in the above cascading method and mixing method: (1) the audio delay is large
The computational complexity of the master MCU is greater than that of other slave MCUs, and when there is a problem with the master MCU (such as a crash), it will cause the entire system to be unavailable

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
  • Audio mixing method in multiple-MCU video conference system
  • Audio mixing method in multiple-MCU video conference system
  • Audio mixing method in multiple-MCU video conference system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] (1) All MCUs are registered to the gatekeeper (GateKeeper, hereinafter referred to as GK), and each MCU establishes a pairwise connection with other MCUs, and each MCU maintains a list of connections with other MCUs and A list of local clients that need to be mixed, that is, two-to-two connections between MUCs are realized through GK.

[0020] like figure 1 As shown, the present invention does not distinguish between the master MCU and the slave MCU when the MCUs are cascaded, each MCU belongs to the same level, and two MCUs are connected to each other to form a mesh topology. Whether to establish a connection between MCUs and open a media channel is determined by GK dynamic scheduling.

[0021] For a certain client, the MCU directly connected to it is called a local MCU, and other MCUs connected to the local MCU become remote MCUs; for a certain MCU, the client directly connected to it is called a local client , and the clients indirectly connected to it through oth...

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

Mixing method in the multi-MCU video conferencing system: (1) all MCUs are registered on the gatekeeper (GateKeeper, hereinafter referred to as GK), each MCU and other MCUs are set up between two connections, and each The MCU maintains a connection list with other MCUs and a local client list that needs to be mixed; (2) The MCU linearly superimposes the audio data sent by the local client according to the local mixing client list, and After encoding, it is sent to each peer MCU; (3) the MCU subtracts the audio data of the client to be sent to the mixed result in step (2) and mixes each decoded audio data sent from the peer MCU, Finally encode and send the result to the target client. The invention can reduce the number of audio data transmission hops and avoid single-point failure of the main MCU under the same network conditions, and has higher reliability.

Description

field of invention [0001] The invention belongs to the field of computer network multimedia communication, and mainly relates to a method for forwarding and mixing audio data in a multi-point video conference in which a plurality of multi-point control units MCUs are cascaded. Background of the invention [0002] Video conferencing systems have been widely used in government departments, business, education, medical care and personal life. Real-time face-to-face video and audio communication not only facilitates people's lives, saves a lot of travel expenses, improves work efficiency, but also promotes the development of video conferencing related technologies. People have also put forward higher requirements for video conferencing systems. [0003] The multi-point control unit MCU is an important part of the video conference based on the H.323 standard. As people's calls for large-scale and popular video conferencing systems are increasing day by day, single MCU video con...

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 Patents(China)
IPC IPC(8): H04N7/15
Inventor 李未陈舟锋苏袆邹建峰沈伟丁嵘顾钰钏
Owner BEIHANG UNIV
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