نتایج جستجو برای: compressed video

تعداد نتایج: 197341  

2014
M Usha

In this paper, to detect the moving objects between frames in compressed video and to obtain the best compression video and the noiseless video. We describe a video in which frames by classifying macroblocks (MB), and describe motion estimation (ME), motion vector field (MV) and motion compensation (MC). we propose to classify Macroblocks of each video frame into different classes and use this ...

2004
Chang-Hong Fu Yui-Lam Chan Wan-Chi Siu

Reverse playback is the most common video cassette recording (VCR) functions in many digital video players. However, the predictive processing techniques employed in MPEG severely complicate the reverse-play operation. In this paper, we propose a compressed-domain approach for the efficient implementation of an MPEG video streaming system to provide the reverse-play operation over a network wit...

Journal: :IEEE Journal on Selected Areas in Communications 1995
Shih-Fu Chang David G. Messerschmitt

Many advanced video applications require manipulations of compressed video signals. Popular video manipulation functions include overlap (opaque or semitransparent), translation, scaling, linear filtering, rotation, and pixel multiplication. In this paper, we propose algorithms to manipulate compressed video in the compressed domain. Specifically, we focus on compression algorithms using the di...

2014
Dallas E. Wrege Edward W. Knightly Hui Zhang

|Compressed digital video is one of the most important tra c types in future integrated services networks. However, a network service that supports delay-sensitive video imposes many problems since compressed video sources are variable bit rate (VBR) with a high degree of burstiness. In this paper, we consider a network service that can provide deterministic guarantees on the minimum throughput...

1995
Shih - Fu Chang David G. Messerschmitt

Many advanced video applications require manipulations of compressed video signals. Popular video manipulation functions include overlap (opaque or semi-transparent), translation, scaling, linear filtering, rotation, and pixel multiplication. In this paper, we propose algorithms to manipulate compressed video in the compressed domain. Specifically, we focus on compression algorithms using the D...

1998
Suchendra M. Bhandarkar Aparna A. Khombhadia

An algorithm for detecting scene changes in compressed video streams is proposed. The proposed algorithm directly exploits the motion compensation information and the prediction error signal in the MPEG1coded video stream. By performing minimal decoding of the compressed video stream, the proposed algorithm results in signi cant savings in terms of execution time and memory requirement. Experim...

2001
C. Andrew Segall Aggelos K. Katsaggelos Rafael Molina Javier Mateos

The problem of recovering a high-resolution frame from a sequence of low-resolution and compressed images is considered. The presence of the compression system complicates the recovery problem, as the operation reduces the amount of frequency aliasing in the low-resolution frames and introduces a non-linear noise process. Increasing the resolution of the decoded frames can still be addressed in...

2012
Tanima Dutta Arijit Sur

Recently, video watermarking has become an important research issue due to increase in threats of video piracy, authentication, and ownership integrity. In this paper, we propose a new secure and robust watermarking method for H.264 compressed video stream with a blind extraction process. Most authors prefer embedding in I-frames because I-frames are crucial for video signal. However, the embed...

2014
Aasha Nandhini

___________________________________________________________________________________________________ Abstract— A Wireless Sensor Network (WSN) consists of several sensor nodes deployed in inaccessible areas for monitoring temperature, pressure, vibration, sound, motion etc. A WSN is used for variety of applications such as military, civil, industrial automation, medical, home automation, fleet m...

2006
S. De Bruyne K. De Wolf W. De Neve P. Verhoeve R. Van de Walle

The increasing availability and use of digital video has led to a high demand for efficient video analysis techniques. The starting point in video browsing and retrieval systems is the low-level analysis of video content, especially the segmentation of video content into shots. In this paper, we propose a method for automatic video indexing based on the macroblock prediction type information of...

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