Effective quality-of-service renegotiating schemes for streaming video is presented. The conventional network supporting quality of service generally allows a negotiation at a call setup. However, it is not efficient for the video application since the compressed video traffic is statistically nonstationary. Thus, we consider the network supporting quality-of-service renegotiations during the d...

Data hiding in compressed video is the recent way of providing security. The main objective of data hiding in video is to transmit the message with security (by encryption) in streaming video. This paper presents a technique to hide secret data in the motion vectors of a compressed video which is not vulnerable to Stag analysis and also to maintain the quality and size of the reconstructed vide...

In this paper, an integrated system model of MPEG-2 video compression/decompression system and OFDM transceiver system has been designed and implemented to investigate and study the impact of various parameters on the quality of the transmitted video signal. MPEG-2 codec system has been used to compress the original video signal to present it in a compressed form. OFDM modulation technique has ...

Real-time video communication over a packet switching network is subject to packet loss and random delay variation called jitter. For compressed video, packet loss can cause significant performance degradation, and for continuous video regeneration, packet jitter can cause discontinuity and additional packet loss. Therefore, for good reception quality of video, a low jitter and a low loss are r...

Content based video indexing and retrieval has its foundations in the analyses of the prime video temporal structures. Consequently, technologies for video segmentation and key-frame extraction have become crucial for the development of advanced digital video systems. Conventional algorithms for video partitioning and keyframe extraction are mainly implemented autonomously. By focusing the anal...

Compressed video is very sensitive to channel errors. A few bit losses can derail the entire decoding process. Therefore, protecting compressed video is always necessary for reliable visual communications. In recent years, the Wyner–Ziv lossy coding theorem has been applied for error resilience and achieved superior improvement over conventional techniques. In our previous work, we proposed an ...

Compressed video processing for the sake of content based retrieval saves time of the expensive decoding. In this paper , we process the compressed MPEG video data for the motion analysis of its contents. Two motion components are differentiated from each other. Firstly, the object's motion; the change in object’s co-ordinate throughout consecutive frames. Secondly, the camera motion resulting ...

Although high dynamic range (HDR) image and video are becoming common in many computer graphics applications, their data compression has received little attention so far. In this paper, we propose a practical approach to HDR video compression for efficient storage and fast transmission. Most current HDR images and videos are created from multiple exposures of the scene with varying exposures or...

In this paper methods for analysing and processing digitised compressed video newsfeeds are discussed. Due to computing, storage and communication limitations the material has to be processed in compressed form. This creates particular problems which are not encountered when decompressed video material is handled. The methods described allow news editors to directly extract information from the...