netmeeting facilitates voice and video conferencing over an internet or lan connection
Tài liệu Voice and Video Conferencing Fundamentals pdf
Ngày tải lên :
23/12/2013, 04:17
... of conferencing and collaboration systems has become more complex Voice and Video Conferencing Fundamentals provides a comprehensive view of audio and video conferencing concepts, and a clear and ... architectures and solutions related to video conferencing, voice and video streaming, and voice- over- IP security Thiya Ramalingam is an engineering manager for the Unified Communications organization ... of Video Compression 45 Evaluating Video Quality, Bit Rate, and Signal-to-Noise Ratio 45 Video Source Formats 47 Profiles and Levels 47 Frame Rates, Form Factors, and Layouts 47 Standard and...
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Tài liệu Voice and Video Enabled IPSec VPN (V3PN) Solution Reference Network Design docx
Ngày tải lên :
24/01/2014, 10:20
... available bandwidth This can be manually changed by the max-reserved-bandwidth interface command • The priority (LLQ) is policed if there is congestion and it exceeds its bandwidth allocation • Bandwidth ... section on page 4-16 or more information regarding IPSec anti-replay and its interaction with QoS Voice and Video Enabled IPSec VPN (V3PN) SRND 3-6 956529 C H A P T E R Planning and Design This chapter ... high availability, and a building block approach to high scalability that can support thousands of branch offices Scalability and performance evaluation was performed with IPSEC and GRE tunnels...
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Tài liệu Video Conferencing Over IP docx
Ngày tải lên :
25/01/2014, 17:20
... of Woodslane for distributing our books throughout Australia, New Zealand, Papua New Guinea, Fiji,Tonga, Solomon Islands, and the Cook Islands v A Word from the Author Personal videoconferencing ... quality of video calls you can today is very good and designed specifically for home broadband connections Vendors use compression and fancy formulas to adjust the quality of the image and balance it ... high-speed Internet, Internet broadband, wireless broadband and broadband Internet are synonymous; throughout the rest of the book, we will use the term broadband Generally, broadband is any device...
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báo cáo hóa học:" Research Article Variable Viscosity on Magnetohydrodynamic Fluid Flow and Heat Transfer over an Unsteady Stretching Surface with Hall Effect" pot
Ngày tải lên :
21/06/2014, 11:20
... Chen and Char presented an exact solution of heat transfer for a stretching surface with variable heat flux P S Gupta and A S Gupta examined the heat and mass transfer for the boundary layer flow over ... suction and blowing Elbashbeshy and Bazid studied heat and mass transfer over an unsteady stretching surface with internal heat generation Abd El-Aziz analyzed the effect of radiation on heat and ... viscosity,” Canadian Journal of Chemical Engineering, vol 87, no 1, pp 47–52, 2009 16 R Tsai, K H Huang, and J S Huang, “Flow and heat transfer over an unsteady stretching surface with non-uniform heat...
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Báo cáo hóa học: " Voice and Video Telephony Services in Smartphone Valeria Loscri’, Mauro Tropea, and Salvatore Marano" docx
Ngày tải lên :
22/06/2014, 22:20
... Communications and Networking Data standards: (i) T.120: protocols and services for multipoint Data conferencing Video window sizes: (i) NTSC—National Television Standards Committee, used in USA, Canada, and ... obtained, such as video conferencing for personal and business use,” “multimedia entertainment services,” telemedical services, Surveillance, live video broadcasting and Video- on-demand (movies, news ... luminance pixels For every four luminance pixels there are a CB pixel and a CR pixel, then a macroblock is formed from four luminance blocks and one of chrominance CB and one of chrominance CR...
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Tài liệu tham khảo voice and telephony networking over ATM
Ngày tải lên :
18/12/2014, 08:29
... Bandwidth allocation Bandwidth release Allocated bandwidth Figure In an ATM network, bandwidth used for voice can be allocated on demand Momentarily unused bandwidth can be used for other applications ... own Box B Standards for voice and telephony over ATM In the past two years, standardization bodies have taken an increasing interest in voice and telephony over ATM (VTOA) In a very short time, ... signaling system (DSS1) and ISDN user part (ISUP), is transparently transported through the ATM network and terminat- Figure An ATM-based multiservice network that provides voice and telephony services...
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Báo cáo toán học: " An occupancy-based and channel-aware multilevel adaptive scheme for video communications over wireless channels" pptx
Ngày tải lên :
20/06/2014, 21:20
... source/channel coding address the problem from an information theoretic point of view, and did Page of 17 not account for network performance and protocol issues, including packetization and retransmissions ... performance of a transmission system Moreover, for the same modulation level and the same FEC, GBN, and SR perform better than SW while the difference in performance between SR and GBN is unnoticeable ... complex and allows real time adjustment of video frame sizes Video streaming performance was studied for the three main ARQ schemes, Stop -and- Wait, Go-back-N, and Selective Repeat The analysis and...
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Báo cáo hóa học: " Research Article Cross-Layer Design for Video Transmission over Wireless Rician Slow-Fading Channels Using an Adaptive Multiresolution Modulation and Coding Scheme" pptx
Ngày tải lên :
22/06/2014, 19:20
... codes, and passive error concealment for video In Section 3, we briefly describe the channel models used and provide the performance analysis for the coded and uncoded systems employing nonuniform ... coding and uniform MPSK either with or without JSCC The results are demonstrated in Figures 11 and 12 for the AWGN and Rician fading channels, respectively For the AWGN channel, we see that for lower ... Transactions on Circuits and Systems for Video Technology, vol 10, no 8, pp 1355–1363, 2000 T Chu and Z Xiong, “Combined wavelet video coding and error control for internet streaming and multicast,” Eurasip...
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Hydraulic modeling of open channel flows over an arbitrary 3-d surface and its applications in amenity hydraulic engineering
Ngày tải lên :
06/11/2012, 10:35
... in a nonorthogonal curvilinear coordinates for prediction of flow pattern in meandering channel with 60o and 90o bend, and also with compound meandering channel In this study, the Cartesian velocity ... coordinate system with an explicit algorithm and constant eddy viscosity This model was used for both subcritical and supercritical flows in a contraction, hydraulic jump, spur dike, and a channel ... gratitude and sincere thanks to Professor Dr Takashi Hosoda who suggested me this research topic, and provided guidance, constant and kind advices, encouragement throughout the research, and above...
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báo cáo hóa học: " Health predicting factors in a general population over an eight-year period in subjects with and without chronic musculoskeletal pain" potx
Ngày tải lên :
18/06/2014, 19:20
... were more complex for subjects with chronic pain; significant worsening for PF (P < 0.001), SF (P = 0.004) and RE (P = 0.001), significant improvement for BP (P = 0.004), and no significant changes ... Figure The SF-36 scores for subjects with and without chronic musculoskeletal pain in 1995 and 2003 The SF-36 scores for subjects with and without chronic musculoskeletal pain in 1995 and 2003 Comparison ... quantity of alcohol was not recorded and any comparable conclusions can not be drawn Thus, further studies have to be done with more questions about the alcohol habits and its importance for...
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báo cáo hóa học:" Health predicting factors in a general population over an eight-year period in subjects with and without chronic musculoskeletal pain" pot
Ngày tải lên :
20/06/2014, 16:20
... were more complex for subjects with chronic pain; significant worsening for PF (P < 0.001), SF (P = 0.004) and RE (P = 0.001), significant improvement for BP (P = 0.004), and no significant changes ... Figure The SF-36 scores for subjects with and without chronic musculoskeletal pain in 1995 and 2003 The SF-36 scores for subjects with and without chronic musculoskeletal pain in 1995 and 2003 Comparison ... quantity of alcohol was not recorded and any comparable conclusions can not be drawn Thus, further studies have to be done with more questions about the alcohol habits and its importance for...
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báo cáo hóa học: " Optimal modulation and coding scheme allocation of scalable video multicast over IEEE 802.16e networks" docx
Ngày tải lên :
21/06/2014, 02:20
... Society, IEEE Standard for Local and Metropolitan Area Networks Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems IEEE standard 802.16-2004 (2004) JG Andrews, A Ghosh, ... Metropolitan Area Networks Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems IEEE Standard 802.16e-2005 (2005) IEEE Computer Society and IEEE Microwave Theory and Techniques ... a video multicast network environment over an IEEE 802.16e network as shown in Figure The MSSs can access the Internet through the BS The ranging process occurs when an MSS joins the network and...
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Báo cáo hóa học: " Editorial The Interplay between Compression and Security for Image and Video Communication and Adaptation over Networks" potx
Ngày tải lên :
21/06/2014, 22:20
... source, channel coding, and secrecy,” deals with the problem where compressed and secured data have to be transmitted over a noisy channel It is shown that compression, security, and error protection ... that can achieve both compression and encryption In their paper “Multimedia encryption with joint randomized entropy coding and rotation in partitioned bitstream,” Xie and Kuo propose a framework ... between compression and encryption is an important research topic, which is highly actual, and will open the way to more research work in the future We tried our best to embrace the many new research...
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Báo cáo hóa học: " Research Article Scalable and Media Aware Adaptive Video Streaming over Wireless Networks" pdf
Ngày tải lên :
22/06/2014, 01:20
... Wang, and T Schierl, “RTP payload format for SVC video, ” draft, Internet Engineering Task Force (IETF), February 2008 [12] 3GPP and Siemens, “Software simulator for MBMS streaming over UTRAN and ... AVC compliant, that is, backwards-compatible, base layer and one, or several, enhancement layer(s) Each enhancement layer can be turned into an AVC-compliant standalone (and not anymore scalable) ... Kalman, Y J Liang, and R Zhang, “Advances in channel-adaptive video streaming,” Wireless Communications and Mobile Computing, vol 2, no 6, pp 573–584, 2002 [5] P A Chou and Z Miao, “Rate-distortion...
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Báo cáo y học: " Derivation and preliminary validation of an administrative claims-based algorithm for the effectiveness of medications for rheumatoid arthritis"
Ngày tải lên :
25/10/2012, 10:45
... coauthors have nothing to disclose Authors’ contributions All authors made substantial contributions to conception and design, and to the analysis and interpretation of the data TRM and GWC handled ... like to thank Mike Connor and Sheryl Berryman at the Birmingham VA Medical Center for their assistance in working with the DSS data This work was supported by the Agency for Research and Quality ... Biologic change deferred in 10 light of concerns for new/worsened comorbidity Clinically stable or improved and patient/physician satisfied, but DAS and DAS change did not meet gold standard effectiveness...
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Thiết kế một trang web theo dõi bằng camera số từ xa/Mở rộng: Video Conferencing System
Ngày tải lên :
24/04/2013, 16:40
... HTTP server port (ví dụ: 8080 port thường sử dụng để thay cho port 80) nhấn nút Submit cuối trang Vẫn chưa xong, bạn cần chuyển sang khung bên trái trang cấu hình nhấp liên kết LAN thuộc nhóm ... Control Panel/ Network Connections, nhấp phải chuột lên tên kết nối mạng LAN (thường Local Area Connection) , chọn Properties Tại thẻ General, nhấp mục Internet Protocol (TCP/IP) khung This connection ... chương trình Chuyển sang thẻ Connection, kéo trượt cuối trang Standard hết phía trái để quy định thời gian tự động cập nhật nhỏ (5 phút), để thời gian dài, bạn lợi băng thông thời gian “chết” Website...
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The Technique of Film and Video Editing 5th Edition
Ngày tải lên :
14/08/2013, 14:41
... Publisher nor the authors, contributors, or editors, assume any liability for any injury and/ or damage to persons or property as a matter of products liability, negligence or otherwise, or from any ... more influential than ever The videocassette recorder (VCR) made movies, old and new, accessible, available, and ripe for rediscovery by another generation The director is king, and film is more ... Boulevard, Langford Lane, Kidlington, Oxford, OX5 1GB, UK r 2011 Elsevier Inc All rights reserved No part of this publication may be reproduced or transmitted in any form or by any means, electronic or...
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Tai lieu flash MX 2004 and video
Ngày tải lên :
15/08/2013, 13:50
... Macromedia Flash and Flash Video Technical Overview of Video Standards .2 Video Standards—NTSC and PAL .2 Interlaced and Progressive Video Introducing the ... live video and audio, or to capture video from clien t’s webcam or DV cameras n Multiway and multiuser streaming for creating chat and real -time collaboration applications by Forest Key and Chris ... explains the basic concepts and usage of video parameters and standards If you are already familiar with these standards and the terminology, you can skip this section and continue with the section...
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