Audio mixer with Automatic Gain Controller for software based Multipoint Control Unit

2010 ◽  
Author(s):  
V. M. Baskaran ◽  
KokSheik Wong
Keyword(s):  
Control Unit ◽  
Multipoint Control ◽  
Multipoint Control Unit

scholarly journals MCU em software distribuído em nuvem

2018 ◽  
Author(s):  
Valter Roesler ◽  
Mário Gasparoni Júnior ◽  
Ronaldo Husemann ◽  
Roberto Irajá Tavares Da Costa Filho ◽  
Rafael Valle
Keyword(s):  
Control Unit ◽  
Session Initiation Protocol ◽  
Maintenance Costs ◽  
Unit System ◽  
Multipoint Control ◽  
Multipoint Control Unit

The presented tool is a fully virtualized videoconferencing MCU (Multipoint Control Unit) system using the standard SIP (Session Initiation Protocol). The proposed tool works in the cloud in a scalable way, with low deployment and maintenance costs. In addition, the proposed tool is more than an MCU, functioning as a universal framework for media forwarding.

scholarly journals Sistema de Videocolaboração interoperável entre webconferência e endpoints de videoconferência

2019 ◽  
Author(s):  
Valter Roesler ◽  
Mário Gasparoni Júnior ◽  
Felipe Cecagno ◽  
Rafael Valle ◽  
Ronaldo Husemann
Keyword(s):  
User Experience ◽  
User Interaction ◽  
Control Unit ◽  
Web Conferencing ◽  
Multipoint Control ◽  
Multipoint Control Unit ◽  
Conferencing System

The purpose of this paper is to present advances in the Mconf web conferencing system to support transparent interoperability with room videoconferencing equipment (known as endpoints), Multipresence system, and Phone@RNP. The system can behave as SFU (Switching Forwarding Unit) or MCU (Multipoint Control Unit), making decisions about the best signal to send to each destination. The following main benefits can be cited: 1) Improving user interaction in the use of such systems, so that it simply enters the portal “Video Collaboration Service”, and the system make the necessary adaptations to obtain the best user experience; 2) Have a single MCU + SFU service, savings resources, as it concentrates programmers on the same code.

scholarly journals A Novel Multi-Level Security Technique Based on IRIS Image Encoding

2018 ◽  
Vol 12 (4) ◽  
pp. 49
Author(s):  
Sadeq AL-Hamouz
Keyword(s):  
Neural Network ◽  
Mobile Communication ◽  
Image Data ◽  
Control Unit ◽  
Security System ◽  
Image Encoding ◽  
Iris Image ◽  
Multipoint Control ◽  
Multipoint Control Unit ◽  
Multi Level

Providing highly secured access to restricted or private areas has become highly required these days, mainly due to terrorism threats. One method of security is no longer sufficient, hence the term and technology of a “multi-level” security system was developed by integrating more than one security procedure, on both hardware and software levels. This research provides a simple, cheap, easily achievable, yet highly secured multi-level security system to control access through doors. The system integrates IRIS scan authentication, innovative IRIS image encoding, encrypted of mobile communication, and multipoint Control Unit (MCU) Security as main procedures of security. The system’s novelty shows in the encoding and encryption of IRIS image data that is acquired by a mobile phone before it is sent to the authentication site, where it is decrypted by a cheap and fast MCU to retrieve the IRIS image that is fed into a Neural Network in order to grant authorization to the user.

Video-Enhanced Microscopy--Better Visibility of Plant Cell Structures

1982 ◽  
Vol 40 ◽  
pp. 182-185
Author(s):  
N.S. Allen ◽  
R.D. Allen
Keyword(s):  
Diffraction Pattern ◽  
Theoretical Basis ◽  
Numerical Aperture ◽  
Gain Control ◽  
Control Unit ◽  
Camera Control ◽  
Variable Gain ◽  
Contrast Method ◽  
Fine Detail ◽  
Cell Structures

Various methods of video-enhanced microscopy combine TV cameras with light microscopes creating images with improved resolution, contrast and visibility of fine detail, which can be recorded rapidly and relatively inexpensively. The AVEC (Allen Video-enhanced Contrast) method avoids polarizing rectifiers, since the microscope is operated at retardations of λ/9- λ/4, where no anomaly is seen in the Airy diffraction pattern. The iris diaphram is opened fully to match the numerical aperture of the condenser to that of the objective. Under these conditions, no image can be realized either by eye or photographically. Yet the image becomes visible using the Hamamatsu C-1000-01 binary camera, if the camera control unit is equipped with variable gain control and an offset knob (which sets a clamp voltage of a D.C. restoration circuit). The theoretical basis for these improvements has been described.

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