Video encryption is becoming increasingly important as multimedia applications gain more and more popularity. With a focus on the widely-used H.264 video coding standard, various encryption algorithms based on the intra prediction mode have been developed while suffering limited scrambling space and inadequate security. In this paper, the existing encryption algorithms are first analyzed with r...

Undoubtedly, Peer-to-Peer (P2P) technology is an effectively method for delivering streaming media content over the internet. However, current P2P stream systems also suffer many problems, such as huge bandwidth consumption, less effective in heterogeneous environment, etc. Scalable video coding (SVC), as an extension of H.264/AVC standard, has attracted many researchers for its flexible scalab...

The new Motion JPEG 2000 standard is providing with some compelling features. It is based on an intra-frame wavelet coding, which makes it very well suited for wireless applications. Indeed, the state-of-the-art wavelet coding scheme achieves very high coding efficiency. In addition, Motion JPEG 2000 is very resilient to transmission errors as frames are coded independently (intra coding). Furt...

Wyner-Ziv video coding is a coding method that exploits source statistics at the decoder. Many Wyner-Ziv video coding schemes encode a video sequence into two types of frames, key frames and Wyner-Ziv frames, and rely on the frequent use of INTRA frames as key frames such that the decoder can derive sufficiently accurate side information. While the use of INTRA frame as key frames keeps the enc...

This paper presents a new paradigm for the Distributed Video Coding (DVC), its coder architecture is quite different from the current DVC video coding architecture. In DVC codec we shift the complexity at encoder to the decoder side, which is suitable for many specific applications such as the low power surveillance, wireless mobile phone, and visual sensor network. Unlike the most popular curr...

In this paper, we present a new approach for INTRA/INTER mode decisions. In the current MPEG verification model (VM), the coding mode for each macroblock is selected by comparing the energy of predictive residuals. Specifically speaking, the INTRA/INTER decision is determined by comparing the variance of the macroblock pixels against the predictive residuals. However, the coding mode selected b...

Efficient image sequence coding exploits both intraand inter-frame correlations. Set partition coding (SPC) is efficient in intra-frame de-correlation for still images. Based on SPC, a novel image sequence coding system, called motion differential SPC (M-D-SPC), is presented in this paper. It removes inter-frame redundancy by re-using the significance map of a previously SPC coded frame. Every ...

501 Abstract—In the H.264/ AVC video coding standard, the intra-prediction coding with various block sizes offers a considerably high improvement in coding efficiency compared to previous standards. In order to achieve this, H.264/AVC uses the Rate-distortion optimization (RDO) technique to select the best intra-prediction mode for a macroblock, and it brings about the drastic increase of the c...

In this paper, we propose a very low bit rate video coding scheme based on a discrete wavelet transform (DWT), block-matching motion estimation (BME) and overlapped block motion compensation (OBMC). Our approach reveals that the coding process works more eeciently if the quan-tized wavelet coeecients will be pre-processed by a mechanism exploiting the redundancies in the wavelet subband structu...

In this paper, we analyze the performance of Motion JPEG2000 for wireless applications. This new standard is based on intra-frame wavelet coding. Motion JPEG2000 is offering a number of very compelling advantages when compared to state-of-the-art MPEG-4 video coding. Wavelet coding achieves very high coding efficiency. Furthermore, because frames are intra coded, it is very error-resilient. Fin...