A smart audio/video mixing method based on main speaker decision for a software-based multipoint control unit

2016 ◽  
Author(s):  
Jin Ah Kang ◽  
Seung Han Choi ◽  
Mikyong Han ◽  
Jong-Hyun Jang
Keyword(s):  
Control Unit ◽  
Multipoint Control ◽  
Multipoint Control Unit ◽  
Mixing Method ◽  
Audio Video

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.

Dysarthric Sentence Intelligibility

1998 ◽  
Vol 41 (6) ◽  
pp. 1282-1293 ◽  
Author(s):  
Jane Mertz Garcia ◽  
Paul A. Dagenais
Keyword(s):  
Speech Intelligibility ◽  
Presentation Mode ◽  
Contextual Influences ◽  
Motor Functioning ◽  
Video Presentation ◽  
Independent Information ◽  
Communicative Process ◽  
Presentation Formats ◽  
Sentence Intelligibility ◽  
Audio Video

This study examined changes in the sentence intelligibility scores of speakers with dysarthria in association with different signal-independent factors (contextual influences). This investigation focused on the presence or absence of iconic gestures while speaking sentences with low or high semantic predictiveness. The speakers were 4 individuals with dysarthria, who varied from one another in terms of their level of speech intelligibility impairment, gestural abilities, and overall level of motor functioning. Ninety-six inexperienced listeners (24 assigned to each speaker) orthographically transcribed 16 test sentences presented in an audio + video or audio-only format. The sentences had either low or high semantic predictiveness and were spoken by each speaker with and without the corresponding gestures. The effects of signal-independent factors (presence or absence of iconic gestures, low or high semantic predictiveness, and audio + video or audio-only presentation formats) were analyzed for individual speakers. Not all signal-independent information benefited speakers similarly. Results indicated that use of gestures and high semantic predictiveness improved sentence intelligibility for 2 speakers. The other 2 speakers benefited from high predictive messages. The audio + video presentation mode enhanced listener understanding for all speakers, although there were interactions related to specific speaking situations. Overall, the contributions of relevant signal-independent information were greater for the speakers with more severely impaired intelligibility. The results are discussed in terms of understanding the contribution of signal-independent factors to the communicative process.

GANGGUAN BERBAHASA AKIBAT ALAT UCAP PADA ANAK USIA 9 TAHUN

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Salsabila Delaria Mulyana
Keyword(s):  
Audio Video

Bahasa anak adalah bahasa yang sangat luas karena pada masa ini anak dibebaskan menyerap semua informasi tanpa ada penyaringan yang bersifat wajib. Banyak orang dewasa yang terpesona melihat kemampuan anak dalam pemerolehan bahasa yang begitu luas. Semua informasi bisa diperoleh anak darimanapun. Akan tetapi dalam proses pemerolehan bahasa, tidak semua anak dapat menerimanya dengan sempurna. Terdapat beberapa anak yang memiliki gangguan berbahasa dalam proses belajarnya. Salah satu penyebab gangguan berbahasa pada anak adalah akibat tidak sempurnanya alat ucap yang dimiliki. Penelitian ini akan membahas penyebab gangguan berbicara pada anak usia 9 tahun akibat alat ucap. Tujuan penelitian ini adalah untuk mengetahui dan memperbaiki gangguan berbahasa yang terjadi akibat alat ucap pada anak. Metode penelitian ini adalah deskriptif kualitatif dengan objek penelitian fokus kepada anak laki-laki usia 9 tahun yang memiliki gangguan berbahasa. Data yang diteliti berbentuk audio, video beserta transkrip percakapan antara peneliti dan objek sekaligus kawan tutur dalam percakapan tersebut. Adapun hasil penelitiannya yaitu (1) Gangguan berbahasa pada anak usia 9 tahun yang diucapkan oleh alat ucap adalah ketidaksempurnaan pada bagian laringal, (2) Faktor lingkungan juga dapat menentukan bagaimana alat ucap dapat menjadi gangguan atau sebaliknya yang mendukung proses pemerolehan bahasa.

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