T. Meier - Böcker
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2 produkter
2 produkter
Del 7 - Advances in Image Communication
Advanced Video Coding: Principles and Techniques
The Content-based Approach
Inbunden, Engelska, 1999
1 809 kr
Skickas inom 5-8 vardagar
In recent years, the paradigm of video coding has shifted from that of a frame-based approach to a content-based approach, particularly with the finalization of the ISO multimedia coding standard, MPEG-4. MPEG-4 is the emerging standard for the coding of multimedia content. It defines a syntax for a set of content-based functionalities, namely, content-based interactivity, compression and universal access. However, it does not specify how the video content is to be generated. To generate the video content, video has to be segmented into video objects and tracked as they transverse across the video frames. This book addresses the difficult problem of video segmentation, and the extraction and tracking of video object planes as defined in MPEG-4. It then focuses on the specific issue of face segmentation and coding as applied to videoconferencing in order to improve the quality of videoconferencing images especially in the facial region. Modal-based coding is a content-based coding technique used to code synthetic objects that have become an important part of video content. It results in extremely low bit rates because only the parameters needed to represent the modal are transmitted. Model-based coding is included to provide background information for the synthetic object coding in MPEG-4. Lastly, MPEG-4, the first coding standard for multimedia content is described in detail. The topics covered include the coding of audio objects, the coding of natural and synthetic video objects, and error resilience. Advanced Video Coding is one of the first books on content-based coding and MPEG-4 coding standard. It serves as an excellent information source and reference for both researchers and practicing engineers.
554 kr
Skickas inom 10-15 vardagar
2.1 Introduction ...32 2.2 Technical Procedures ...32 Chemical Synthesis ...35 2.3 Results and Discussion...38 ...Chemical Synthesis ...38 Binding to anti-CCK antisera and CCK-B receptors ...40 Binding to streptavidin agarose and photoelution ...40 Affinity chromatography ...41 2.4 Troubleshooting...43 References ...44 ...Purification of the Receptor for Pituitary Adenylate Cyclase-Activating Polypeptide (PACAP) using Biotinylated Ligands ...45 Summary ...45 3.1 Introduction ...46 ...3.2 Technical Procedures ...48 Preparation of a Biotinylated Ligand ...48 Preparation of Membrane Fraction ...50 Solubilization of the PACAP Receptor ...51 Partial Purification of the PACAP Receptor ...52 Affinity Purification of the PACAP Receptor ...54 Final Purification of the PACAP Receptor ...56 Receptor-Binding Assay ...57 3.3 Results and Discussion...58 ...3.4 Troubleshooting ...61 Impurity in PACAP27-Cys-NH...61 2 Low specific activity of the PACAP receptor despite a single band ...62 Acknowledgments ...62 References ...63 ...Photoreactive Biotinylated Peptide Ligands for Affinity Labeling ..." 65 Summary ...65 4.1 Introduction...66 . 4.2 Technical Procedures ..."67 Synthesis of a trifunctional photoactivatable biotinylating reagent ...67 Synthesis of photo reactive biotinylated peptide hormones ...67 Site-specific incorporation of biotin and photo labels in separate steps ...69 Photoaffinity labeling ...72 4.3 Results and Discussion ...76 Synthesis of photoactivatable insulins with permanent biotin labels ...76 Applications: Insulin ...78 VI Examples for other applications ...78 4.4 Troubleshooting...79 References ...81 ...