voice and video conferencing fundamentals

... Digital Video Compression Digital Video Compression Fundamentals and Standards Fundamentals and Standards Speaker: Wei-Yi Wei Speaker: Wei-Yi Wei Advisor: ... Future Work and Conclusions 2008/12/26 Digital Video Compression Fundamentals an d Standards 3 Outline Outline Introduction Introduction Video Compression Standards Video Compression Standards Simulation ... Work and Conclusions 2008/12/26 Digital Video Compression Fundamentals an 17 The Development of Video Compression Standards 2008/12/26 Digital Video Compression Fundamentals

Ngày tải lên: 02/07/2014, 23:21

... . 1 Macromedia Flash and Flash Video 1 Technical Overview of Video Standards .2 Video Standards—NTSC and PAL ... Overview of Video Standards Many people creating Flash Video projects files have a background in web design and desktop publishing, and might not have the technical understanding of video necessary ... image quality for their video projects. This section explains the basic concepts and usage of video parameters and standards. If you are already familiar with these standards and the terminology,

Ngày tải lên: 15/08/2013, 13:50

... techniques,and intelligent multimedia processing; (2) methodologies, techniques, and applications: im-age and video coding, image and video storage and retrieval, digital video transmission, videoconferencing, ... distance education, video on demand, and telemedicine.The book begins with the existing standards for multimedia, discussing their impacts tomultimedia image and video processing, and pointing out ... segmentation, and feature extraction techniques utilized in coding, storage, and retrieval and transmission, media fusion, and graphical interface.Compression and coding of video and images are

Ngày tải lên: 23/10/2013, 16:15

... reference and warped sprite are both 720 × 576 pixels and four overflow bits are used, then a = 4, k = 10, j = 10, and 24 total bits are required for calculating xn and yn 2.3.2 Memory Bandwidth ... current value of the x and y coordinates, xn and yn , are calculated from the previous values of the x and y coordinates, xn−1 and. .. = 0, d = 0, e = 1, f = 0, g = −0.1, and h = 0.002 case ... receives dx and dy from the ALU and outputs a bilinearly interpolated pixel after reading every fourth pixel P0 and P1 are first linearly interpolated using dx to compute P01 P2 and P3 are

Ngày tải lên: 27/10/2013, 23:15

... music, it’s enough to frazzle some nerves A more polite way to handle background audio is to display the playback controls and let your visitors decide whether to click the play button ... E-Phonic player up and running... place, like when a visitor mouses over a picture Figure 1-5: The E-Phonic player has many different skins Each defines the layout and graphics that make ... that make up the player’s interface The standard skin (nobius platinum) is at the top, the dazzling green alien skin is shown in the middle, and the nearly invisible micro skin appears

Ngày tải lên: 23/03/2014, 01:20

... Cryptography and Public Key Infrastructure   Security on Different Layers   Layer 2 and BGP Security   Server and Operational Security Acknowledgements   Merike Kaeo from Double Shot Security and ... Internet and Network Security Fundamentals Presenters   Champika Wijayatunga Training Manager, APNIC champika@apnic.net Overview   Network Security Basics   Security Issues, Threats and ... APNIC acknowledges her contribution and support with appreciation and thanks. Network Security Basics Why Security?   Security threats are real…   And need protection against   Fundamental

Ngày tải lên: 28/03/2014, 20:20

... real-time image and video processing, Hardware platforms for real-time imageand video processing, Software methods for real-time image and video processing Trang 51 Real-Time Image and Video Processing ... Real-Time Image and Video Processing: From Research to Reality Nasser Kehtarnavaz and Mark Gamadia www.morganclaypool.com 1598290525 paper Kehtarnavaz/Gamadia Real-Time Image and Video Processing ... guidelines and help bridge the gap between the theory and the practice of image and video processing by providing a broad overview of proven algorithmic, hardware, software tools and strategies.This

Ngày tải lên: 05/06/2014, 11:40

... audio and video standards around 1988 Since thenthe committee has been recommending different video compression standardsfor different ranges of data rates and video quality such as MPEG1, MPEG2,and ... image and video resizing, transcoding,etc In addition, different other applications in the compressed domain such as video and image editing, digital watermarking and steganography, imageand video ... image andvideo compression algorithms, notably JPEG, JPEG2000, MPEG-2, MPEG- 4, and H.264 standards for lossy image and video compression schemes Issuesrelated to compressed domain analysis and

Ngày tải lên: 05/06/2014, 12:04

... transport and display equipment which were not optimized and matched with each other and are having large tolerances and deviations Therefore, it becomes increasingly difficult to design a viable video-level ... can also beused for video-level control The control associated withthese parameters is stable and fast (change is effective nextvideo frame already) and offers good linearity and knownresponse In ... standard cases and does not contain significantnew work It starts with an overview of existing typicalsolutions and strategies used for determining the optimallevel control of HDR images in standard

Ngày tải lên: 21/06/2014, 06:20

... in a gradual transition between c(x) and csm (x) Figure illustrates the approach by showing the relevant images and masks 8 EURASIP Journal on Image and Video Processing (a) (b) (c) (d) (e) ... and automated detection of lesions [42] Consequently, removal of these artefacts is of high importance both from the clinical and the technical perspectives 10 EURASIP Journal on Image and Video ... 2007-2013, Ireland References [1] G N Khan and D F Gillies, “Vision based navigation system for an endoscope,” Image and Vision Computing, vol 14, no 10, pp 763–772, 1996 [2] C K Kwoh, G N Khan, and D

Ngày tải lên: 21/06/2014, 06:20

... 10], objects and surroundings, exploiting perspective and 3D [11, 12], and objects and scene [13], using the statistics of low-level features The statistical relationship between people and objects ... divided in two parts, namely (A) learning and (B) exploiting the context Step (A) makes use of video data and of general-purpose models to extract new and refined models that better fit the domain-specific ... 4: The scheme of the domain-specific video surveillance The meaning and use of parametersα, β, and η are provided inSection 5.1 The use of multiresolution video data is described inSection 3.2

Ngày tải lên: 21/06/2014, 06:20

... Rate (FRR) of MSM, AHM and Avg-Feature on MOBIO dataset with 4 and 8 frames selected randomly and sequentially, respectively Random selection is to choose frames in a video randomly with equal probability ... still image face recognition and to be capable for still-to-video and video-to-video matching, we propose the following approaches to enhance MRH for face recognition on videos In this section, we ... still images and video sequences It can be further classified into three categories: still image to still image matching, video sequence to video sequence matching, and still image to video sequence

Ngày tải lên: 21/06/2014, 06:20

... selective encryption and Shannon’s work on communication and security [1] It is well known that statistics for image and video data differ much from classical text data Indeed, image and video data are ... type: image and video. Trang 9Wen, Severa, Zeng, Luttrel, and Jin, 2002 A general selectiveencryption approach for fixed and variable length codes (FLC and VLC) is proposed in [24] FLC and VLC codewords ... PDAs, mobile phones, and other mobile terminals are more and more used for multimedia communication (voice, image, video, etc.) while still requiring copyright protection and access control Their

Ngày tải lên: 22/06/2014, 00:20

... Geneva, Switzerland, 2002 [23] J M Loomis and S J Lederman, “Tactual perception,” in Handbook of Perception and Human Performance: Cognitive Processes and Performance, K R Boff, L Kaufman, and J P Thomas, ... Netherlands, 1996 [38] G Burdea and P Coiffet, Virtual Reality Technology, John Wiley & Sons, New York, NY, USA, 2003 EURASIP Journal on Image and Video Processing [39] P J Standen, D J Brown, and ... EURASIP Journal on Image and Video Processing Volume 2007, Article ID 25214, 12 pages doi:10.1155/2007/25214 Review Article Image and Video Processing for Visually Handicapped People Thierry

Ngày tải lên: 22/06/2014, 00:20

... modality (related to hand configuration and hand position with respect to the face) Figures and present the eight different hand shapes which code the consonants and the five hand positions which ... regions Contact of two hands Identifying the left and right hands Motion of objects other than the hands Fast and highly variable motion of the hand High degree of freedom of the hand Assumptions/Restrictions ... consequence, we are focusing on hand-position recognition, lip reading, and hand and lip data flow fusion 2.2.1 Hand-position recognition and face processing Once the hand configuration (for consonant

Ngày tải lên: 22/06/2014, 00:20

... coding and compression A number of video coding standards have been developed,ITU-T H.261, H.263, ISO/IEC MPEG-1, MPEG-2, MPEG- 4, and H.264/AVC, and deployed in multimedia applicationssuch as video ... and deployed in multimedia applicationssuch as video conferencing, storage video, video-on-demand,digital television broadcasting, and Internet video streaming[110] In most of the developed solutions, ... which still need addressing and which are the next and future perspectives of color in image and video processing This survey is intended for graduate students, researchers and practitioners who have

Ngày tải lên: 22/06/2014, 00:20

... G1,3=0.81 Cost1,3=28.12 bytes (bandwidth needed 1)  G2,3=0.13 Cost2,3=56.25 bytes (bandwidth needed 2) (26) Bandwidth needed 1=28.12 bytes Bandwidth needed 2=84.37 bytes Bandwidth needed B av 100 bytes ... less available bandwidth, B av = 70 for example, would have led to selecting only  G1,3, and so, protecting and transmitting only Pack1 with RS(45,32) 5 JPEG 2000 IMAGE AND VIDEO STREAMING OVER ... a robust streaming of images and videos over MANET The packet-based proposed scheme has a low complexity and is compliant to JPWL, the 11th part of the JPEG 2000 standard The effectiveness of the

Ngày tải lên: 22/06/2014, 01:20

... image descriptions. Local and global visual features can represent various aspects of the image or video contents (color and texture, e.g.) and in different ways for local and global de- scriptions. ... IMAGE AND VIDEO INDEXING We consider a variety of numcepts for the building of index- ing networks. We chose them at several levels (low and in- termediate) and for several modalities (image and ... level (low and in- termediate). We use the “A −B” notation for the early fusion of numcepts A and B and the “A + B” notation for the late fusion of numcepts A and B. We also use “lo,” “gl,” and “to”

Ngày tải lên: 22/06/2014, 06:20

... the advanced scalable video and image coding and the context-awareness framework, medical video and image delivery can be opti-mized in terms of better resources utilization and best per-ceived ... Finally,Section 7concludes the article and discusses future work 2 RELATED WORK IN SCALABLE CODING AND ADAPTIVE IMAGE AND VIDEO TELEMEDICINE SYSTEMS Scalable image and video coding has attracted recently ... alternatively video can be replaced by highly compressed images (suitable for low-bandwidth networks) Video and image coding and transmission can also vary according to network availability and quality

Ngày tải lên: 22/06/2014, 19:20