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130 results on '"video file"'

1. Video Recorder as an Object of Forensic Expert Analysis

Author

S. A. Krutov

Subjects
computer forensics, video recorder, hdd, video recording, filesystem, data analysis in sectors, video file, Social pathology. Social and public welfare. Criminology, HV1-9960
Abstract

The article addresses the issues related to stationary video recorders: their types, purpose, principles of functioning, design characteristics, key components installed in these devices. The author analyses the procedure for using the video recordings from the surveillance cameras in court proceedings. He also justifies the need for comprehensive examinations when investigating stationary video recorders and points out the cases when the appointment of an examination is necessary and when a specialist inspection is enough. The paper presents a research sequence for a stationary video recorder as a computer forensics’ object. Possible questions to the expert, methods, and approaches are listed; difficulties arising during the examination are considered. The author analyzes a case study of a stationary video recorder examination from the expert practice of the laboratory of computer forensics of the Russian Federal Centre of Forensic Science of the Russian Ministry of Justice.

Published
2021
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7. Video

Author

Green, Tom, Labrecque, Joseph, GREEN, TOM, and Labrecque, Joseph

Published
2017
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8. On the Concept of Big Data Analysis

Author

Pashayev, A. B., Sabziev, E. N., Kacprzyk, Janusz, Series editor, Zadeh, Lotfi A., editor, Abbasov, Ali M., editor, Yager, Ronald R., editor, Shahbazova, Shahnaz N., editor, and Reformat, Marek Z., editor

Published
2016
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26. Azure Real-World Scenarios

Author

Copeland, Marshall, Soh, Julian, Puca, Anthony, Manning, Mike, Gollob, David, Copeland, Marshall, Soh, Julian, Puca, Anthony, Manning, Mike, and Gollob, David

Published
2015
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31. New video encryption schemes based on chaotic maps.

Author

Elkamchouchi, Hassan, Salama, Wessam M., and Abouelseoud, Yasmine

Abstract

Two new encryption algorithms for secure video transmission are proposed in this paper. The two algorithms employ different types of chaotic maps to generate the keystream for encrypting the video frames. Both algorithms involve a substitution step and a permutation step to achieve confusion and diffusion requirements. For efficient transmission, the video file is compressed before being encrypted. In the basic implementation of both algorithms, MPEG‐2 standard is used for compression. However, the algorithms are shown to be compliant with other compression techniques. In the permutation step, the effect of the block size used in the shuffling process is examined. Smaller blocks result in increasing the processing time, while reducing both the correlation between adjacent pixels and the peak‐signal‐to noise ratio of an encrypted frame. The use of a Feistel structure is investigated to enhance security and its negative impact on the encryption time is demonstrated. The experimental results of the two proposed schemes confirm that they represent different tradeoffs between security and computational efficiency. Both schemes are sensitive to slight variations in the encryption key as apparent from the obtained differential measures. The conducted comparative study shows the competitiveness of the proposed schemes to existing schemes in literature. [ABSTRACT FROM AUTHOR]

Published
2020
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32. Array computing and curve plotting

Author

Langtangen, Hans Petter, Barth, Timothy J., Series editor, Griebel, Michael, Series editor, Keyes, David E., Series editor, Nieminen, Risto M., Series editor, Roose, Dirk, Series editor, Schlick, Tamar, Series editor, and Langtangen, Hans Petter

Published
2014
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