Relevant bibliographies by topics / Video telephony

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Video telephony'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

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Journal articles on the topic "Video telephony"

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Angiolillo, Joel S., Harry E. Blanchard, and Edmond W. Israelski. "Video Telephony." AT&T Technical Journal 72, no. 3 (May 6, 1993): 7–20. http://dx.doi.org/10.1002/j.1538-7305.1993.tb00536.x.

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Kraut, Robert E., and Robert S. Fish. "Prospects for video telephony." Telecommunications Policy 19, no. 9 (December 1995): 699–719. http://dx.doi.org/10.1016/0308-5961(95)00048-8.

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Early, Scott H., Andrew Kuzma, and Eric Dorsey. "The VideoPhone 2500-Video Telephony on the Public Switched Telephone Network." AT&T Technical Journal 72, no. 1 (January 2, 1993): 22–32. http://dx.doi.org/10.1002/j.1538-7305.1993.tb00519.x.

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Hanzo, L., C. H. Wong, and P. Cherriman. "Channel-adaptive wideband wireless video telephony." IEEE Signal Processing Magazine 17, no. 4 (July 2000): 10–30. http://dx.doi.org/10.1109/79.855910.

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Sheat, D. E., G. R. Chamberlain, and D. J. McCartney. "Three-dimensional imaging for video telephony." Displays 16, no. 2 (January 1995): 51–54. http://dx.doi.org/10.1016/0141-9382(95)91173-y.

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Jana, Shraboni, An Chan, Amit Pande, and Prasant Mohapatra. "QoE prediction model for mobile video telephony." Multimedia Tools and Applications 75, no. 13 (June 14, 2015): 7957–80. http://dx.doi.org/10.1007/s11042-015-2711-5.

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Arnaert, Antonia, and Lucas Delesie. "Telenursing for the elderly. The case for care via video-telephony." Journal of Telemedicine and Telecare 7, no. 6 (December 1, 2001): 311–16. http://dx.doi.org/10.1258/1357633011936912.

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As most elderly people prefer home care to residential care, the nursing profession must change its current practice. New models of care are necessary. Information and communications technologies, such as video-telephony (i.e. any form of face-to-face video-communication), allow elderly people to maintain their autonomy by strengthening their emotional, relational and social abilities. Experiments in a variety of settings have tested a range of interventions based on video-telephony, from the simple giving of information to the provision of therapeutic procedures. The elderly have appreciated the opportunity to use video-telephony to communicate with a nurse about their needs, expectations and feelings. After some initial scepticism, nurses have concluded that telenursing complements traditional nursing practice. Although technology is no panacea for the problems of ageing, when applied judiciously it can bolster the position of vulnerable ageing citizens.
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Jabri, M. A. "The 3G-324M protocol for conversational video telephony." IEEE MultiMedia 11, no. 3 (July 2004): 102–5. http://dx.doi.org/10.1109/mmul.2004.18.

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Jang, Sung-Bong, and Hong-Seok Na. "Synchronization Quality Enhancement in 3G-324M Video Telephony." IEEE Transactions on Circuits and Systems for Video Technology 21, no. 10 (October 2011): 1512–21. http://dx.doi.org/10.1109/tcsvt.2011.2164832.

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KIM, C. "Efficient Media Synchronization Method for Video Telephony System." IEICE Transactions on Information and Systems E89-D, no. 6 (June 1, 2006): 1901–5. http://dx.doi.org/10.1093/ietisy/e89-d.6.1901.

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Dissertations / Theses on the topic "Video telephony"

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Chung, Jin Yee. "Wireless video telephony." Thesis, University of Southampton, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409602.

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Högberg, Robert. "Video telephony in an IP-based set-top box environment." Thesis, Linköping University, Department of Computer and Information Science, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2351.

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This thesis evaluates and shows an implementation of a video telephony solution for network connected set-top boxes based on the SIP protocol for managing sessions.

Unlike other video telephony implementations the set-top box does not handle both audio and video, but only video. A separate phone is used to handle audio. To maintain compatibility with other video telephony implementations, which expect a single SIP device with both audio and video capabilities, a mechanism to merge the audio (SIP-phone) and video (set-top box) into a single entity was developed using a back-to-back user agent.

Due to the set-top boxes'limited hardware it could be impossible to have video compression and decompression performed by the set-top boxes. However, numerous performance tests of compression algorithms showed that the computational power available in the set-top boxes is sufficient to have acceptable frame rate and image quality in a video telephony session. A faster CPU or dedicated hardware for video compression and decompression would however be required in order to compete with dedicated video telephony systems available today.

The implemented video telephony system is based on open standards such as SIP, RTP and H.261, which means interoperability with other video telephony implementations, such as Microsoft's Windows Messenger 4.7, is good.

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Ma, Zhenyu. "Semi-synchronous video for Deaf Telephony with an adapted synchronous codec." Thesis, University of the Western Cape, 2009. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_2950_1370593938.

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Communication tools such as text-based instant messaging, voice and video relay services, real-time video chat and mobile SMS and MMS have successfully been used among Deaf people. Several years of field research with a local Deaf community revealed that disadvantaged South African Deaf 
people preferred to communicate with both Deaf and hearing peers in South African Sign Language as opposed to text. Synchronous video chat and video 
relay services provided such opportunities. Both types of services are commonly available in developed regions, but not in developing countries like South 
Africa. This thesis reports on a workaround approach to design and develop an asynchronous video communication tool that adapted synchronous video 
 
codecs to store-and-forward video delivery. This novel asynchronous video tool provided high quality South African Sign Language video chat at the 
expense of some additional latency. Synchronous video codec adaptation consisted of comparing codecs, and choosing one to optimise in order to 
minimise latency and preserve video quality. Traditional quality of service metrics only addressed real-time video quality and related services. There was no 
uch standard for asynchronous video communication. Therefore, we also enhanced traditional objective video quality metrics with subjective 
assessment metrics conducted with the local Deaf community.

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Dawood, Muneeb. "Error resilient packet switched H.264 video telephony over third generation networks." Thesis, De Montfort University, 2010. http://hdl.handle.net/2086/4849.

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Real-time video communication over wireless networks is a challenging problem because wireless channels suffer from fading, additive noise and interference, which translate into packet loss and delay. Since modern video encoders deliver video packets with decoding dependencies, packet loss and delay can significantly degrade the video quality at the receiver. Many error resilience mechanisms have been proposed to combat packet loss in wireless networks, but only a few were specifically designed for packet switched video telephony over Third Generation (3G) networks. The first part of the thesis presents an error resilience technique for packet switched video telephony that combines application layer Forward Error Correction (FEC) with rateless codes, Reference Picture Selection (RPS) and cross layer optimization. Rateless codes have lower encoding and decoding computational complexity compared to traditional error correcting codes. One can use them on complexity constrained hand-held devices. Also, their redundancy does not need to be fixed in advance and any number of encoded symbols can be generated on the fly. Reference picture selection is used to limit the effect of spatio-temporal error propagation. Limiting the effect of spatio-temporal error propagation results in better video quality. Cross layer optimization is used to minimize the data loss at the application layer when data is lost at the data link layer. Experimental results on a High Speed Packet Access (HSPA) network simulator for H.264 compressed standard video sequences show that the proposed technique achieves significant Peak Signal to Noise Ratio (PSNR) and Percentage Degraded Video Duration (PDVD) improvements over a state of the art error resilience technique known as Interactive Error Control (IEC), which is a combination of Error Tracking and feedback based Reference Picture Selection. The improvement is obtained at a cost of higher end-to-end delay. The proposed technique is improved by making the FEC (Rateless code) redundancy channel adaptive. Automatic Repeat Request (ARQ) is used to adjust the redundancy of the Rateless codes according to the channel conditions. Experimental results show that the channel adaptive scheme achieves significant PSNR and PDVD improvements over the static scheme for a simulated Long Term Evolution (LTE) network. In the third part of the thesis, the performance of the previous two schemes is improved by making the transmitter predict when rateless decoding will fail. In this case, reference picture selection is invoked early and transmission of encoded symbols for that source block is aborted. Simulations for an LTE network show that this results in video quality improvement and bandwidth savings. In the last part of the thesis, the performance of the adaptive technique is improved by exploiting the history of the wireless channel. In a Rayleigh fading wireless channel, the RLC-PDU losses are correlated under certain conditions. This correlation is exploited to adjust the redundancy of the Rateless code and results in higher Rateless code decoding success rate and higher video quality. Simulations for an LTE network show that the improvement was significant when the packet loss rate in the two wireless links was 10%. To facilitate the implementation of the proposed error resilience techniques in practical scenarios, RTP/UDP/IP level packetization schemes are also proposed for each error resilience technique. Compared to existing work, the proposed error resilience techniques provide better video quality. Also, more emphasis is given to implementation issues in 3G networks.
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Newman, John M. "The effects of synchronous voice and video tools on acceptance of online communications by students in undergraduate technology courses /." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3276959.

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Thesis (Ph. D.)--University of Nevada, Reno, 2007.
"May, 2007." Includes bibliographical references (leaves 85-104). Online version available on the World Wide Web. Library also has microfilm. Ann Arbor, Mich. : ProQuest Information and Learning Company, [2007]. 1 microfilm reel ; 35 mm.
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Hallberg, Andreas. "A protocol for decentralized video conferencing with WebRTC : Solving the scalability problems of conferencing services for the web." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202963.

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Video conferencing has been a part of many communication platforms over the years. Over the last decades users have moved from dedicated telephony networks to the Internet, and recently to the Web. With the introduction of Web Real-Time Communication (WebRTC) it is now possible to make voice- and video calls simply by visiting a web page, without having to install any additional software. Services that enable multi-user conferences are quite common. However existing solutions such as the Multipoint Control Unit (MCU) inherently do not scale and can be a single point of failure, due to its centralized architecture. This can lead to high maintenance costs and poor service availability.To solve the scalability- and availability problems of video-conferencing services, a decentralized alternative to the MCU is proposed. A decentralized conferencing system uses the distributed resources of its users instead of relying on a central server. This means that the system can handle an increasing number of users without having to upgrade any server infrastructure. Additionally, failures are only partial and can happen regularly without affecting the rest of the system. This report presents the development of a protocol built on top of WebRTC that enables completely decentralized multi-user conferencing. It includes a distributed algorithm for voice-activated switching to reduce the computation and network resources used. A load-balancing technique based on media stream relays is used to distribute the resource requirements of the conference participants. The protocol is implemented as a Javascript library that can be included in a web application. A proof-of-concept web application is developed using the library and its performance is evaluated. The performance data is analyzed and the results are used to make incremental improvements to the protocol and implementation. Although not all features of the protocol are implemented, the tests show promising results. The application allows multiple users to participate in high-definition video conferences, with no server infrastructure aside from a Mini PC that hosts a web server and a WebRTC signaling server.
Videokonferenser har varit en del av många olika kommunikationsplattformar genom åren. Tekniken har yttats från dedikerade telefonnnät,, till Internet, och på senare tid till webben. I och med introduktionen av WebRTC (Web Real-Time Communication) är deti dag möjligt att enkelt deltaga i röst- och videosamtal genom att gå till en webbsida utan att behöva installera någon programvara annat an en webbläsare. De flesta existerande konferenstjänster är byggda med en centraliserad arkitektur, vilket kan leda till tekniska problem när antalet användare ökar eller när fel uppstår i systemens centrala servrar. Dessa problem kan leda till driftstopp och skada tjänstens tillgänglighet för användarna. Den här rapporten täcker utvecklingen av ett protokoll som tillsammans med WebRTC kan användas för att bygga en helt decentraliserad konferenstjänst. Målet är att tjänsten ska vara oberoende av centrala servrar, och på så vis lösa problemen med skalbarhet och tillgänglighet. Protokollet implementeras i en webbapplikation som testas och utvärderasöver flera iterationer för att hitta nya förbättringar. Testerna visar lovande resultat. Slutsatsen dras det är fullt möjligt att bygga en konferenstjänst på detta sätt, och möjligheter för framtida optimeringar och testfall föreslås.
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Gandham, Venkata Kishore. "Virtual visual system for interactive video applications over telephone networks." FIU Digital Commons, 1995. http://digitalcommons.fiu.edu/etd/3449.

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Yoshida, Minoru. "Barriers for telecommunication accessibility and needs assessment of video relay services (VRS) : utilization of VRS for the deaf community /." Online version of thesis, 2008. http://hdl.handle.net/1850/6923.

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Karlsson, Johan. "Development and Standardization of a "Failure". : Ericsson and the Video Telephone in the 1970's." Thesis, Uppsala University, Department of Economic History, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-122924.

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Stegmann, Johann. "Design and implementation of a digital video recorder, with live video streaming to cellphone over mobile broadband." Thesis, Stellenbosch : University of Stellenbosch, 2007. http://hdl.handle.net/10019.1/2642.

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Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2007.
The work presented in this Thesis relates to the increased capabilities of the mobile Internet and the possible use of cellphones as an enhancement to video surveillance systems. The focus of the Thesis is on the delivery of live video content to Java enabled cellphones. The various characteristics, capabilities and limitations of the mobile networks- and phones are investigated. Various options for streaming video content to cellphones are also explored. The design and implementation of a digital surveillance system with the ability to stream live video to a cellphone is presented. Two versions of the streaming protocol are developed and implemented in cellphone applications, with which the video stream can be viewed. An evaluation and real-life testing of the applications are presented. Recommendations regarding further enhancements are provided.
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Books on the topic "Video telephony"

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Mobile video telephony for 3G wireless nerworks. New York: McGraw-Hill, 2005.

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Lewcio, Błażej. Management of Speech and Video Telephony Quality in Heterogeneous Wireless Networks. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-02102-7.

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Institute, American National Standards. American national standard for telecommunications--digital transport of video teleconferencing/video telephony signals--performance terms, definitions, and examples. New York, N.Y: American National Standards Institute, 1996.

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Thiya, Ramalingam, and Fry Steve, eds. Voice and video conferencing fundamentals. Indianapolis, IN: Cisco Press, 2007.

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Breznick, Alan. The field guide to the new broadband media: Everything you always wanted to know about-- video-on-demand (VOD), interactive television (ITV), broadband internet, cable telephony, home networking, digital cable, interactive program guides (IPGs). Centennial, Colo: Genuine Article Press, 2002.

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Johnson, Leland L. Common carrier video delivery by telephone companies. Santa Monica, CA: Rand, 1992.

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United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Telecommunications and the Internet. How Internet protocol-enabled services are changing the face of communications: A look at video and data services : hearing before the Subcommittee on Telecommunications and the Internet of the Committee on Energy and Commerce, House of Representatives, One Hundred Ninth Congress, first session, April 20, 2005. Washington: U.S. G.P.O., 2005.

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Video relay service interpreters: Intricacies of sign language access. Washingon, D.C: Gallaudet University Press, 2011.

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Video dialtone technology: Digital video over ADSL, HFC, FTTC, and ATM. New York: McGraw-Hill, 1995.

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Hudetz, Walter. Das Bildtelefon in der geschäftlichen Kommunikation: Endbericht. Karlsruhe: Abt. Telematik, Fraunhofer-Institut für Systemtechnik und Innovationsforschung, 1989.

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Book chapters on the topic "Video telephony"

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Lewcio, Błażej. "Experience of Video Telephony." In T-Labs Series in Telecommunication Services, 81–121. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-02102-7_5.

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O'Hara, Kenton, Alison Black, and Matthew Lipson. "Media Spaces and Mobile Video Telephony." In Computer Supported Cooperative Work, 303–23. London: Springer London, 2009. http://dx.doi.org/10.1007/978-1-84882-483-6_19.

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Kim, Changhee, Taeyoung Na, Jeongyeon Lim, Youngho Joo, Kimun Kim, Jaewoan Byun, and Munchurl Kim. "An ROI/xROI Based Rate Control Algorithm in H.264|AVC for Video Telephony Applications." In Advances in Image and Video Technology, 1010–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-92957-4_88.

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Hoppe, Christian, Tadeus Uhl, and Krzysztof Nowicki. "Determining QoS in the Video Telephony Service in an IP Environment." In Lecture Notes in Computer Science, 123–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-13789-1_12.

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Gudkova, Irina A., and Konstantin E. Samouylov. "Modelling a Radio Admission Control Scheme for Video Telephony Service in Wireless Networks." In Internet of Things, Smart Spaces, and Next Generation Networking, 208–15. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-32686-8_19.

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Wallwork, Adrian. "PARTICIPATING IN AUDIO AND VIDEO CONFERENCE CALLS." In Telephone and Helpdesk Skills, 89–97. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-1812-6_13.

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Woodcock, Bruce. "Telephone, Skype and video interviews." In Excel at Graduate Interviews, 110–23. London: Macmillan Education UK, 2016. http://dx.doi.org/10.1057/978-1-137-53585-6_8.

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Armstrong, Phillip, and H. Lori Schnieders. "Video and telephone technology in supervision and supervision-in-training." In Technology in Counselling and Psychotherapy, 129–40. London: Macmillan Education UK, 2003. http://dx.doi.org/10.1007/978-0-230-50015-0_8.

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Schmidt, Mark, Steve Ironside, Mervyn Jack, and Fred Stentiford. "User perspectives on the security of access data, operator handover procedures and ‘insult rate’ for speaker verification in automated telephone services." In Audio- and Video-based Biometric Person Authentication, 429–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/bfb0016024.

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V√§yrynen, S., and P. Pulli. "Video Telephony." In International Encyclopedia of Ergonomics and Human Factors, Second Edition - 3 Volume Set. CRC Press, 2006. http://dx.doi.org/10.1201/9780849375477.ch274.

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Conference papers on the topic "Video telephony"

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Jana, Shraboni, Eilwoo Baik, Amit Pande, and Prasant Mohapatra. "Improving mobile video telephony." In 2014 Eleventh Annual IEEE International Conference on Sensing, Communication, and Networking (SECON). IEEE, 2014. http://dx.doi.org/10.1109/sahcn.2014.6990388.

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Harinath Garudadri, Hyukjune Chung, Naveen Srinivasamurthy, and Phoom Sagetong. "Rate adaptation for video telephony in 3G networks." In Packet Video 2007. IEEE, 2007. http://dx.doi.org/10.1109/packet.2007.4397059.

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Xu, Yang, Chenguang Yu, Jingjiang Li, and Yong Liu. "Video telephony for end-consumers." In the 2012 ACM conference. New York, New York, USA: ACM Press, 2012. http://dx.doi.org/10.1145/2398776.2398816.

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Muir, Laura J., and Iain E. G. Richardson. "Video telephony for the deaf." In the tenth ACM international conference. New York, New York, USA: ACM Press, 2002. http://dx.doi.org/10.1145/641007.641137.

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O'Hara, Kenton, Alison Black, and Matthew Lipson. "Everyday practices with mobile video telephony." In the SIGCHI conference. New York, New York, USA: ACM Press, 2006. http://dx.doi.org/10.1145/1124772.1124900.

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Vanam, Rahul, and Yuriy Reznik. "Error-resilient video coding for wireless video telephony applications." In SPIE Optical Engineering + Applications, edited by Andrew G. Tescher. SPIE, 2012. http://dx.doi.org/10.1117/12.940754.

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Zia, W., T. Afzal, W. Xu, G. Liebl, and T. Stockhammer. "Interactive Error Control for Mobile Video Telephony." In 2007 IEEE International Conference on Communications. IEEE, 2007. http://dx.doi.org/10.1109/icc.2007.300.

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Covell, Michele, Sumit Roy, Bo Shen, and Frederic Huve. "Time Scale Modification for 3G-Telephony Video." In 2006 IEEE Workshop on Multimedia Signal Processing. IEEE, 2006. http://dx.doi.org/10.1109/mmsp.2006.285287.

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Vaz, Ricardo N., B. W. M. Kuipers, and Mario S. Nunes. "Video quality optimization algorithm for video-telephony over IP networks." In 2010 IEEE 21st International Symposium on Personal, Indoor and Mobile Radio Communications - (PIMRC 2010). IEEE, 2010. http://dx.doi.org/10.1109/pimrc.2010.5671755.

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Schiffner, Falk, and Sebastian Moller. "Defining the relevant perceptual quality space for video and video-telephony." In 2017 Ninth International Conference on Quality of Multimedia Experience (QoMEX). IEEE, 2017. http://dx.doi.org/10.1109/qomex.2017.7965662.

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Reports on the topic "Video telephony"

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Garcia-Martin, M., and S. Veikkolainen. Session Description Protocol (SDP) Extension for Setting Audio and Video Media Streams over Circuit-Switched Bearers in the Public Switched Telephone Network (PSTN). RFC Editor, May 2014. http://dx.doi.org/10.17487/rfc7195.

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