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As an efficient technology for lossy data compression, vector quantization (VQ) is widely used in the field of image coding with the virtues of simple algorithm and high compression rate. ITU-H.264 is a video coding standard published in March, 2005. The framework of H.264 is not much different compared to those previous standards, but it improves each function by adopting mature techniques, so...
The H.264/AVC video coding standard introduces some improved tools in order to increase compression efficiency. Moreover, the multi-view extension of H.264/AVC, called H.264/MVC, adopts many of them. Among the new features, variable block-size motion estimation is one which contributes to high coding efficiency. Furthermore, it defines a different prediction structure that includes hierarchical...
In this paper, we study the best rate distortion performance that an H.264 encoder can possibly achieve. Using soft decision quantization rather than the standard hard decision quantization, we first establish a general framework for jointly designing motion compensation, quantization, and entropy coding in the hybrid coding structure of H.264 to minimize a true rate distortion cost. We then pr...
Guanylyl cyclase C (GCC) is a cell-surface protein that is expressed by normal intestinal epithelial cells, more than 95% of metastatic colorectal cancers (mCRC), and the majority of gastric and pancreatic cancers. Due to strict apical localization, systemically delivered GCC-targeting agents should not reach GCC in normal intestinal tissue, while accessing antigen in tumor. We generated an inv...
This paper presents the macroblock/slice level pipeline structure for an H.264/AVC [email protected] codec. In H.264/AVC, level 4.2 (L4.2) in high profile (HP) describes the encoding/decoding capability of 1920x1088@64p sequence/ bitstream of up to 62.5 Mbps. To meet this tremendous specification, the novel hardwired architecture of the H.264/AVC codec is also presented. It supports both encoding and dec...
H.264 video coding standard is one of the most promising techniques for the future video communications. In fact, it supports a broad range of applications. Accordingly, with the continuous promotion of multimedia services, H.264 has been widely used in real-world applications. A major concern in the design of H.264 encryption algorithms is how to achieve a sufficiently high security level, whi...
Efficient H.264/AVC Video Encoder Where Pattern Is Used as Extra Mode for Wide Range of Video Coding
Pattern-based video coding representing moving regions in macroblock has very good potential for improved coding efficiency over existing standard H.264/AVC in the very low bit-rate range. However, the coding efficiency diminishes compared to H.264 with the bit rates because variable block sizes of H.264 for motion estimation and compensation are successfully selected for any bit rates using we...
H.264/AVC video compression standard provides high coding efficiency, but it has high complexity and consumes more power. This paper explains advantages of H.264 audio video codec and why this H.264 technology should be on the shopping list of every business. Digital video streams, especially at high definition (HD) resolution, represent huge amounts of data. In order to achieve real-time HD re...
AIM To explore the role of complement system in the T cell activation. METHODS OVA(257-264) CTL epitope and C3b(AN42) encoding genes were synthesized and cloned into expression vector pEGFP-N1. COS-7 cells were transfected with the recombinant plasmid pEGFP-N1. The expression of the fusion protein was determined by FACS. Twenty-four hours after transfection, cultural supernatants of the trans...
H.264 [1] is initiated by ITU-T as H.26L and will become a joint standard of ITU-T and MPEG. The coding complexity of H.264 is much higher than MPEG-4 simple profile and advance simple profile algorithms. In order to achieve real-time encoding, hardware implementation is required. The original test model of H.264 (JM) [2] is designed to achieve high coding performance. Some algorithms of the te...
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