This paper proposes an effective technique, which can detect malicious manipulations under video lossy compressing data (e.g. H.263) and still-image lossy compressing data (e.g. JPEG). A blockclassification strategy is used to divide DCT-blocks into the flat-blocks and the normal-blocks. Simple features of the both blocks are embedded invisibly. For later authentication, the watermarked frame i...

We describe a technique for video summarization that uses motion descriptors computed in the compressed domain to speed up conventional color based video summarization technique. The basic hypothesis of the work is that the intensity of motion activity of a video segment is a direct indication of its “summarizability.” We present experimental verification of this hypothesis. We are thus able to...

The enhancement of compressed video is considered. We present a general algorithm for processing the compressed data, with three variants of the algorithm having practical application. We then consider the algorithm within the context of MPEG-2. Assuming complete knowledge of the compressed bitstream, experiments compare the different realizations of the enhancement algorithm. Our comparisons s...

Compressed video is well known to be self-similar in nature. We model VBR carrying long-range dependent, multiplexed MPEG-2 video sources traffic. The actual traffic for the model is generated using fast-fourier transform of the fractional gaussian noise sequence. Our model of compressed video sources bears similarity to an MPEG-2 transport stream carrying video, i.e., it is long-range dependen...

We present an end-to-end server–client system for high-resolution video transmission over IP networks. The system supports communication of compressed information, user operations through a fully functional user interface as well as detection and tracking of moving objects/people. It relies on a communication subsystem which has been developed for real time transmission of MJPEG / MJPEG2000 com...

This work proposes a novel methodology to describe the Low-Frequency behaviour of compressed 3D video streams, i.e., their average fluctuations on longer time scales. This study is innovative for two reasons. First, it proves that the LowFrequency behaviour of the video data belongs to the class of Quasi-Periodic processes. Second, it proposes an innovative approach to describe the long-term be...

In recent years, several compressed-domain based processing methods such as video downscaling, ltering, inverse motion compensation, etc. have been developed for MPEG compressed digital video. These processing methods assume that the underlying MPEG video was coded in only one mode, namely, frame or eld mode. In order to support both frame and eld-mode coded video, in this paper, we present a f...

This paper deals with data hiding in compressed video. Unlike data hiding in images and raw video which operates on the images themselves in the spatial or transformed domain which are vulnerable to steganalysis, we target the motion vectors used to encode and reconstruct both the forward predictive (P)-frame and bidirectional (B)-frames in compressed video. The choice of candidate subset of th...