Results 11 - 20 of 78

AN EFFICIENT, PARALLEL MULTI-KEY ENCRYPTION OF COMPRESSED VIDEO STREAMS

by Er Wong, William Bishop
"... The popularity of digital video storage and delivery systems has given rise to the need for video encryption to preserve secrecy and digital rights. Conventional encryption techniques are not appropriate for securing multimedia systems given the need to encrypt a large amount of data in real-time. T ..."
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The popularity of digital video storage and delivery systems has given rise to the need for video encryption to preserve secrecy and digital rights. Conventional encryption techniques are not appropriate for securing multimedia systems given the need to encrypt a large amount of data in real

2-D SIGNAL PROCESSING FOR IMAGE COMPRESSION

by S. Venkatesan, Vibhuti Narain Rai
"... An image is basically a 2-D signal processed by the human optical system. The signals representing pictures are sometimes in analog kind. However, for process, storage, and transmission by laptop applications, they are regenerated from analog to digital kind. A digital image is largely a pair of Dim ..."
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An image is basically a 2-D signal processed by the human optical system. The signals representing pictures are sometimes in analog kind. However, for process, storage, and transmission by laptop applications, they are regenerated from analog to digital kind. A digital image is largely a pair

Brain Image Compression Techniques

by R. R. Gharieb, Sabah M. Ahmed, Mahmoud Khaled
"... Abstract — This paper presents a survey of different methods in the prospect of medical and brain image compression. Compressing an image is basically a process of encoding the image to reduce the size of image as a number of bytes for storage and transmission purposes. This should be done while pre ..."
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Abstract — This paper presents a survey of different methods in the prospect of medical and brain image compression. Compressing an image is basically a process of encoding the image to reduce the size of image as a number of bytes for storage and transmission purposes. This should be done while

In-service Performance Metrics for MPEG-2 Video Systems

by Stephen Wolf, Margaret H. Pinson - Measurement Techniques of the Digital Age Technical Seminar , 1998
"... Abstract: With the advent of new digital video systems that utilize compression to achieve a savings in transmission or storage bandwidth, the quality of the received output video can be dependent not only upon the inherent spatial and temporal information content of the input video but also upon th ..."
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Abstract: With the advent of new digital video systems that utilize compression to achieve a savings in transmission or storage bandwidth, the quality of the received output video can be dependent not only upon the inherent spatial and temporal information content of the input video but also upon

Container shipping: Operating system support for I/O-intensive applications

by Joseph Pasquale, Eric Anderson, San Diego, I Keith Muller, T Global, Information Solutions - IEEE Computer , 1994
"... Container shipping for interdomain transfers involves no physical copying. Its cost is proportional to the amount of data actually accessed, often a fraction of the data transferred. ew I/O devices with data rates ranging from 10 to 100 Mbytes per second are becoming available for personal computers ..."
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computers and workstations. These include human-interaction devices for video capture and display (and audio record and playback), high-capacity storage devices, and high-speed net-work communication devices. Along with continual improvements in processor, memory, and bus technology, these devices have

An End to End Software Only Scalable Video Delivery System

by Navin Chaddha, Gerard A. Wall, Brian Schmidt , 1995
"... Precompressed video delivery systems commonly operate at fixed data rates even though scarcity of network bandwidth and processor cycles is a common occurrence in the dynamic environment of general purpose computing systems. Scarcity arises from the outright lack of resources (e.g. network bandwidth ..."
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. This paper describes an endto -end system combining a new scalable video compression algorithm, video delivery software, a software video decoder, and a market-based mechanism for the resolution of conflicts in providing video to the user. 1. Introduction Sun Microsystems Laboratories and Stanford

Real-time Abnormal Motion Detection in Surveillance Video

by Nahum Kiryati, Tammy Riklin Raviv, Yan Ivanchenko, Shay Rochel
"... Video surveillance systems produce huge amounts of data for storage and display. Long-term human monitoring of the acquired video is impractical and ineffective. Automatic abnormal motion detection system which can effectively attract operator attention and trigger recording is therefore the key to ..."
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Video surveillance systems produce huge amounts of data for storage and display. Long-term human monitoring of the acquired video is impractical and ineffective. Automatic abnormal motion detection system which can effectively attract operator attention and trigger recording is therefore the key

Prediction-Guided Quantization for Video Tone Mapping

by Agnès Le Dauphina, Ronan Boitarda, Dominique Thoreaua, Yannick Oliviera, Francoisa
"... Tone Mapping Operators (TMOs) compress High Dynamic Range (HDR) content to address Low Dynamic Range (LDR) displays. However, before reaching the end-user, this tone mapped content is usually compressed for broadcasting or storage purposes. Any TMO includes a quantization step to convert floating po ..."
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block-based encoder. The mode that minimizes a rate-distortion criterion uses its associated quantization to provide integer values for the rest of the encoding process. The method has been implemented in HEVC and was tested over two different scenarios: the compression of tone mapped LDR video content

Spatio-Temporal Indexing of Vector Quantized Video Sequences

by Fayez M. Idris, Sethuraman Panchanathan, Senior Member - IEEE Trans. on Circuits & Syst. For Video Techn , 1997
"... Abstract—Visual (image and video) database systems require efficient indexing to enable fast access to the images in a database. In addition, the large memory capacity and channel bandwidth requirements for the storage and transmission of visual data necessitate the use of compression techniques. Ve ..."
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Abstract—Visual (image and video) database systems require efficient indexing to enable fast access to the images in a database. In addition, the large memory capacity and channel bandwidth requirements for the storage and transmission of visual data necessitate the use of compression techniques

Multi-viewWireless Video Streaming Based onCompressed Sensing: Architecture and Network Optimization

by Nan Cen, Zhangyu Guan, Tommaso Melodia
"... Multi-view wireless video streaming has the potential to enable a new generation of efficient and low-power perva-sive surveillance systems that can capture scenes of interest from multiple perspectives, at higher resolution, and with lower energy consumption. However, state-of-the-art multi-view co ..."
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-view coding architectures require relatively complex predic-tive encoders, thus resulting in high processing complexi-ty and power requirements. To address these challenges, we consider a wireless video surveillance scenario and pro-pose a new encoding and decoding architecture for multi-view video systems
Results 11 - 20 of 78