Using Chaotic Maps for Encrypting Image and Video Content

2011 ◽  
Author(s):  
Amit Pande ◽  
Prasant Mohapatra ◽  
Joseph Zambreno
Keyword(s):  
Chaotic Maps ◽  
Video Content

Steganography Between Silence Intervals of Audio in Video Content Using Chaotic Maps

2014 ◽  
Vol 33 (12) ◽  
pp. 3901-3919 ◽  
Author(s):  
Muhammad Fahad Khan ◽  
Faisal Baig ◽  
Saira Beg
Keyword(s):  
Chaotic Maps ◽  
Video Content

Amazons Kampf um das Wohnzimmer

2016 ◽  
Vol 13 (3) ◽  
pp. 37-39
Author(s):  
Ralf Kaumanns
Keyword(s):  
Streaming Media ◽  
Video On Demand ◽  
Video Content ◽  
On Demand

Der Kampf um das Wohnzimmer ist voll entbrannt. Eine Reihe von Anbietern versuchen Streaming Media-Dienste im deutschen Markt zu etablieren. Amazon hat sich mit seiner Strategie eine marktführende Rolle erarbeiten können. Laut einer Analyse von Goldmedia¹ besitzt Amazon mittlerweile einen Anteil im Video-On-Demand-Markt von 38,9%, deutlich vor Wettbewerbern wie Apple, Maxdome, Google oder Netflix. Der Erfolg kommt nicht von ungefähr. Der Grund liegt vor allem in einer umfassenden Strategie rund um das Thema Bewegtbild und Video Content. Im Kampf um das Wohnzimmer haben selbst große und finanzkräftige Wettbewerber einen schweren Stand, um mit umfassend gebündelten Angeboten Schritt zu halten.

Detecting “DeepFakes” in H.264 Video Data Using Compression Ghost Artifacts

2020 ◽  
Vol 2020 (4) ◽  
pp. 116-1-116-7
Author(s):  
Raphael Antonius Frick ◽  
Sascha Zmudzinski ◽  
Martin Steinebach
Keyword(s):  
Image Forensics ◽  
Video Data ◽  
Experimental Results ◽  
Video Sequences ◽  
The Internet ◽  
Video Content ◽  
High Quality ◽  
The Public

In recent years, the number of forged videos circulating on the Internet has immensely increased. Software and services to create such forgeries have become more and more accessible to the public. In this regard, the risk of malicious use of forged videos has risen. This work proposes an approach based on the Ghost effect knwon from image forensics for detecting forgeries in videos that can replace faces in video sequences or change the mimic of a face. The experimental results show that the proposed approach is able to identify forgery in high-quality encoded video content.

The screen performance as an instrument of propaganda (on the example of Ivan Kavaleridze’s film «Koliivshchyna», 1933)

2019 ◽  
Vol 25242644 ◽  
pp. 63-68
Author(s):  
Alina Lisnevska
Keyword(s):  
Video Content ◽  
The Public ◽  
Screen Media ◽  
Social Settings ◽  
Soviet Ideology ◽  
The One ◽  
Historical Truth ◽  
Screen Performance ◽  
Personalized Video ◽  
Remote Past

The myth-making processes in the communicative space are the «cornerstone» of ideology at all times of mankind’s existence. One of the tools of the effective impact of propaganda is trust in information. Today this come round due to the dissemination of information on personalized video content in social networks, including through converged media. New myths and social settings are creating, fate of the countries is being solved, public opinion is being formed. It became possible to create artificially a model of social installation using the myths (the smallest indivisible element of the myth) based on real facts, but with the addition of «necessary» information. In the 20–30 years of the XX century cinematograph became the most powerful screen media. The article deals with the main ideological messages of the Ukrainian Soviet film «Koliivshchyna» (1933). In the period of mass cinematography spread in the Soviet Ukraine, the tape was aimed at a grand mission – creation of a new mythology through the interpretation of the true events and a con on the public, propaganda of the Soviet ideology. This happened in the tragic period of Ukrainian history (1933, the Holodomor) through the extrapolation of historical truth and its embodiment in the most formative form at that time – the form of the screen performance. The Soviet authorities used the powerful influence of the screen image to propagate dreams, illusions, images, stereotypes that had lost any reference to reality. I. Kavaleridze’s film «Koliivshchyna» demonstrates the interpretation of historical events and national ideas, the interpretation of a relatively remote past through the ideology of the «Soviet-era». The movie is created as a part of the political conjuncture of the early 1930s: the struggle against Ukrainian «bourgeois nationalism» and against the «Union of Liberation Ukraine», the repressive policies against the peasants, the close-out of the «back to the roots» policy. The movie, on the one hand, definitely addresses to the Ukrainian ideas, on the other hand it was made at the period of the repressions against the Ukrainian peasantry. In the movie «Koliivshchyna», despite the censorship, I. Kavaleridze manages to create a national inclusive narrative that depicts Ukrainian space as multi-ethnic and diverse, but at the same time nationally colorful.

Multi-level Security Based On Dynamic Magic Cube And Chaotic Maps

2017 ◽  
pp. 106
Author(s):  
Dhaher Abass Redha ◽  
Marwa Mohamed ali Mohsen
Keyword(s):  
Chaotic Maps ◽  
Multi Level ◽  
Magic Cube

Japanese-language videos on YouTube as a source of public health information for COVID-19 (Preprint)

2020 ◽  
Author(s):  
Takeo Yasu
Keyword(s):  
Public Health ◽  
Health Information ◽  
Scientific Evidence ◽  
The State ◽  
Video Content ◽  
Sources Of Information ◽  
State Of Emergency ◽  
Public Health Information ◽  
Youtube Videos ◽  
Spread Of Infection

BACKGROUND Serious public health problems, such as the COVID-19 pandemic, can cause an infodemic. Sources of information that may cause an infodemic include social networking services; YouTube, which consists of content created and uploaded by individuals, is one such source. OBJECTIVE To survey the content and changes in YouTube videos that present public health information about COVID-19 in Japan. METHODS We surveyed YouTube content regarding public health information pertaining to COVID-19 in Japan. YouTube searches were performed on March 6, 2020 (before the state of emergency), April 14 (during the state of emergency), and May 27 (after the state of emergency was lifted), with 136, 113, and 140 sample videos evaluated, respectively. The main outcome measures were: (1) The total number of views for each video, (2) video content, and (3) the usefulness of the video. RESULTS In the 100 most viewed YouTube videos during the three periods, the number of videos on public health information in March was significantly higher than in May (p = .02). Of the 331 unique videos, 9.1% (n = 30) were released by healthcare professionals. Useful videos providing public health information about the prevention of the spread of infection comprised only 13.0% of the sample but were viewed significantly more often than not useful videos (p = .006). CONCLUSIONS Individuals need to take care when obtaining information from YouTube before or early in a pandemic, during which time scientific evidence is scarce.

scholarly journals 346 How Do we Increase Adherence to Home Exercise Programmes? Interviews with Older Adults and Physiotherapists

2019 ◽  
Vol 48 (Supplement_3) ◽  
pp. iii17-iii65
Author(s):  
Siti Khalijah ◽  
Suzanne Timmons
Keyword(s):  
Older Adults ◽  
Cardiovascular Health ◽  
Home Exercise ◽  
Video Content ◽  
Structured Interviews ◽  
Timed Up And Go ◽  
Convenience Sample ◽  
Improve Compliance ◽  
Exercise Programmes ◽  
Purposive Sample

Abstract Background Regular exercise and physical activity can maintain function and cardiovascular health, and prevent cognitive decline, in older adults. However, studies show that there is often poor adherence to home exercise programmes (HEP). The purpose of this study was to explore how HEP are perceived by both older adults and physiotherapists. Methods A convenience sample of 28 older adults attending outpatient physiotherapy clinics were given an exercise journal to record their adherence to the HEP prescribed by their physiotherapists for six weeks. Subsequently, semi-structured interviews were conducted with a purposive sample, and the corresponding prescribing physiotherapists, to achieve maximal variation in terms of HEP adherence, age and sex. The interviews were audio recorded, transcribed, and simple content analysis performed. Results Fourteen participants returned their exercise journal. Median age was 80; half were female; median Berg Balance Score and Timed-up-and-Go-Test were 49 and 16 seconds respectively. Participants exercised a median 79.8% of the prescribed dose, or 5.6 days per week. Seven older adults were interviewed; about half had a positive attitude towards exercise. They were also moderately positive about their HEP (comments ranged from “doable” and “nothing bad about it” to “enjoyable”). Barriers included time, mood, boredom, remembering to do the HEP, and variable health status. Enablers included simple instructions and design, family encouragement, and sense of achievement. Physiotherapists (n=5) perceived that many older adults aren’t compliant with HEPs, but there was some therapeutic nihilism (“you can’t force them”). Their HEP instructions varied from verbal to written instructions/diagrams; one physiotherapist used individualised video content. Notably, participants with good adherence understood their HEP well in terms of content and purpose, although this may be cause or effect. Conclusion To improve compliance with HEP, healthcare professionals need to take time to motivate the recipient, simplify their instructions, and trouble-shoot potential barriers at the time of prescription.

scholarly journals A quality analysis of the YouTube video content on meniscus repair surgery

2021 ◽  
Vol 9 (2_suppl) ◽  
pp. 2325967121S0001
Author(s):  
François Sigonney ◽  
Camille Steltzlen ◽  
Pierre Alban Bouché ◽  
Nicolas Pujol
Keyword(s):  
Medical Information ◽  
Cruciate Ligament ◽  
Meniscus Repair ◽  
Quality Analysis ◽  
Video Content ◽  
Source Type ◽  
Keywords Meniscus ◽  
Youtube Videos ◽  
Anterior Cruciate

Objectives: The Internet, especially YouTube, is an important and growing source of medical information. The content of this information is poorly evaluated. The objective of this study was to analyze the quality of YouTube video content on meniscus repair. The hypothesis was that this source of information is not relevant for patients. Methods: A YouTube search was carried out using the keywords "meniscus repair". Videos had to have had more than 10,000 views to be included. The videos were analyzed by two evaluators. Various features of the videos were recorded (number of views, date of publication, "likes", "don’t likes", number of comments, source, type of content and the origin of the video). The quality of the video content was analyzed by two validated information system scores: the JAMA benchmark score (0 to 4) and the Modified DISCERN score (0 to 5). A specific meniscus repair score (MRSS scored out of 22) was developed for this study, in the same way that a specific score has been developed for other similar studies (anterior cruciate ligament, spine, etc.). Results: Forty-four (44) videos were included in the study. The average number of views per video was 180,100 (± 222,000) for a total number of views of 7,924,095. The majority of the videos were from North America (90.9%). In most cases, the source (uploader) that published the video was a doctor (59.1%). A manufacturer, an institution and a non-medical source were the other sources. The content actually contained information on meniscus repair in only 50% of the cases. The mean scores for the JAMA benchmark, MD score and MRSS were 1.6/4± 0.75, 1.2/5 ± 1.02 and 4.5/22 (± 4.01) respectively. No correlation was found between the number of views and the quality of the videos. The quality of videos from medical sources was not superior to those from other sources. Conclusion: The content of YouTube videos on meniscus repair is of very low quality. Physicians should inform patients and, more importantly, contribute to the improvement of these contents.

Fixed viewport applications for omnidirectional video content

2020 ◽  
Author(s):  
Emmanouil Potetsianakis ◽  
Emmanuel Thomas ◽  
Karim El Assal ◽  
Oskar van Deventer
Keyword(s):  
Video Content
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