scholarly journals Video quality assurance in multi-source streaming techniques

2007 ◽  
Author(s):  
Pablo Rodríguez-Bocca ◽  
Héctor Cancela ◽  
Gerardo Rubino
Keyword(s):  
Quality Assurance ◽  
Video Quality

scholarly journals A Bayesian Network Based Method for Service Quality Optimization

2018 ◽  
Vol 11 (3) ◽  
pp. 1
Author(s):  
Lian Gaofeng
Keyword(s):  
Quality Assurance ◽  
Service Quality ◽  
Bayesian Network ◽  
Video Quality ◽  
Quality Parameters ◽  
Industrial Sectors ◽  
Internet Streaming ◽  
Contextual Awareness ◽  
The Relationship ◽  
Quality Assurance Method

Video conference, as an application of Internet streaming media, has attracted wide attention from both academic and industrial sectors. However, usersmay encounter many problemsindailyuse, such as poor video quality, playback delay, and lack of adjustable context, whichcausenegative impactson customers’usage experience. Existing end-to-end service quality assurance method mainly analyzes the relationship between the target service quality parameters and the context in a “single” manner. In this paper, we propose a Bayesian network-based service quality assurance method (named as Comprehensively Context-Aware approach, CCA), which combines Bayesian network and fuzzy set theoryand obtainsrandomrelationshipsamongdifferent service quality parameters through contextual awareness. Comprehensive experimentsclearly validate the superiority of CCA against other well-established methods.

Design and Implementation of OTT Services Based on IPTV STB

2013 ◽  
Vol 411-414 ◽  
pp. 985-988
Author(s):  
Zhi Qiang Xia ◽  
Li Ming Ma ◽  
San Xing Cao
Keyword(s):  
Quality Assurance ◽  
Video Quality ◽  
Video Content ◽  
Live Video ◽  
Management Software ◽  
Design And Implementation ◽  
Set Top Box ◽  
Industry Standards ◽  
Interactive Experience

Currently, the main disadvantages of OTT services are live video delay and video quality assurance while OTT services have many interactive contents. In contrast, IPTV reception effect is better however policy restrictions, incomplete standards and lack of content are the IPTV deficiencies. Therefore, this paper proposes a method of implanting OTT services into IPTV system. The design and implementation maintain the intrinsic IPTV services and ImageMagick is used to present OTT services in IPTV set-top box (STB) according to the current IPTV industry standards. Meanwhile, the services can be designed through the management software. Finally, the OTT services based on IPTV STB can enrich IPTV video content and enhance user interactive experience.

Outcomes/Quality Assurance

1999 ◽  
Vol 8 (1) ◽  
pp. 15-17
Author(s):  
Michael Groher ◽  
Caryn Easterling
Keyword(s):  
Quality Assurance

Percutaneous Tracheostomy: A Multidisciplinary Approach

2008 ◽  
Vol 18 (2) ◽  
pp. 87-98 ◽  
Author(s):  
Vinciya Pandian ◽  
Thai Tran Nguyen ◽  
Marek Mirski ◽  
Nasir Islam Bhatti
Keyword(s):  
Health Care ◽  
Quality Assurance ◽  
Data Collection ◽  
Health Care Professionals ◽  
Multidisciplinary Approach ◽  
Percutaneous Tracheostomy ◽  
Johns Hopkins Hospital ◽  
Prospective Data ◽  
Comprehensive Service ◽  
Over Time

Abstract The techniques of performing a tracheostomy has transformed over time. Percutaneous tracheostomy is gaining popularity over open tracheostomy given its advantages and as a result the number of bedside tracheostomies has increased necessitating the need for a Percutaneous Tracheostomy Program. The Percutaneous Tracheostomy Program at the Johns Hopkins Hospital is a comprehensive service that provides care to patients before, during, and after a tracheostomy with a multidisciplinary approach aimed at decreasing complications. Education is provided to patients, families, and health-care professionals who are involved in the management of a tracheostomy. Ongoing prospective data collection serves as a tool for Quality Assurance.

Quality assurance of volumetric modulated arc therapy using Elekta Synergy

2009 ◽  
pp. 1-5 ◽  
Author(s):  
Akihiro Haga ◽  
Keiichi Nakagawa ◽  
Kenshiro Shiraishi ◽  
Saori Itoh ◽  
Atsuro Terahara ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Volumetric Modulated Arc Therapy ◽  
Arc Therapy

Study of quality assurance in prevention and therapy of pressure sores by measurement of overlay pressure with test persons on different prophylaxis systems

Pflege ◽  
2000 ◽  
Vol 13 (5) ◽  
pp. 297-305 ◽  
Author(s):  
Stefan Roales-Welsch ◽  
Antaszek ◽  
Hense ◽  
Pfeiffer ◽  
Freyenhagen ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Pressure Sores ◽  
Os Coccygis ◽  
Prevention And Therapy

In dieser Studie zur Qualitätssicherung in der Prophylaxe und Therapie des Dekubitus durch Auflagedruckmessungen bei Probanden auf sechs Weichlagerungs- und fünf Wechseldrucksystemen war die Zielsetzung, eine Ist-Analyse der am Klinikum eingesetzten Antidekubitushilfsmittel durchzuführen. Außerdem galt es herauszufinden, ob die angewandte Methode der pneumatischen Druckmessung mit Probanden auch im Versorgungsalltag verwendbar ist. Können verlässliche und valide Messdaten erwartet werden, wenn man bei betroffenen Patienten Messungen durchführt? Zur Beantwortung dieser Fragen wurden bei 23/19 Probanden, auch in Seitenlage, durch das Platzieren von Messmatten zwischen Körper und unterschiedliche Antidekubitussysteme Messungen durchgeführt. Bei den Weichlagerungssystemen kann an allen Messorten eine signifikante Druckreduzierung (p < 0,05), am Os coccygis eine hochsignifikante Druckreduzierung (p < 0,01) nachgewiesen werden. Bei den Wechseldrucksystemen liegt der Mittelwert der maximalen Druckbelastung über 12 min bei unterschiedlicher Amplitude (75,47 mmHg–5 mmHg) und verschiedener Frequenz (1,5 min–10 min) zwischen 56,39 mmHg und 38,94 mmHg.

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