The recently developed H.264 video standard achieves efficient encoding over a bandwidth ranging from a few kilobits per second to several megabits per second. Hence, transporting H.264 video is expected to be an important component of many networks multimedia services. However, due to lack of QoS support reaction networks, the basic GMPLS network management is not sufficient to deliver real-ti...

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Copyright © 2006 Jar-Ferr (Kevin) Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The recently developed video coding standard, H.264/AVC, significantly outperforms previous standards in terms of coding performance at ...

This paper presents a new watermarking framework, suitable for authentication of H.264 compressed videos. The authentication data is embedded as fragile, blind and erasable watermark with low video quality degradations. Because of using a fragile watermark, hard authentication is possible. In contrast to other approaches, the watermarking is done after the H.264 compression process. Hence, the ...

The growth of medical image processing increases the demand of lossless compression and it became a topic of interest. The basic formatting H.264/AVC contains inefficiency in compression ratio it should be improved to give better compression ratio. The proposed method use the concept of lossless compression in H.264/AVC category using pixel-wise spatial interleave prediction (PWSIP) and context...

H.264/AVC has been widely applied to various applications. However, a new video compression standard, High Efficient Video Coding (HEVC), had been finalized recently. In this work, a fast transcoder from H.264/AVC to HEVC is proposed. The proposed algorithm includes the fast prediction unit (PU) decision and the fast motion estimation. With the strong relation between H.264/AVC and HEVC, the mo...

Integer Discrete Cosine Transform (DCT) is among the techniques used to improve the performance of the H.264/AVC Standard. All the profiles in the H.264/AVC standard support 4×4 integer DCT and the high profiles of this standard support 8×8 integer DCT as well as the 4×4 integer DCT. Various hardware realizations have been proposed for forward and inverse integer DCT in the literature because t...

The emerging H.264 video coding standard offers a flexible coding algorithm for use in a range of applications from broadcast TV to low bitrate mobile applications. The flexibility comes with complexity. The H.264 video coding algorithm is complex and requires substantial amount of resources for encoding and decoding. The resources required to decode an H.264 video varies depending upon the enc...

Components of an Ultrasound Quality Assurance Program 257 Quality Assurance and Preventive Maintenance 257 Tissue-Mimicking Phantoms 257 Tissue Properties Represented in Phantoms 257 Typical Quality Assurance Phantom Design 257 Cautions About Phantom Desiccation 258 Basic Quality Control Tests 259 Visual Inspection 259 Transducer Choice 259 System Sensitivity 260 Photography and Gray-Scale Hard...

In this paper we propose several mapping schemes for streaming video generated by state–of–the–art H.264 codec over IEEE 802.11e enabled wireless LANs. The schemes take advantage of both 802.11e’s QoS mechanism and some novel features of the H.264 codec, so as to protect the most important information in terms of visual quality and reduce distortion under network congestion. The proposed method...