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Displaying 1-11 out of 11 total
Acoustic Echo Cancelation for High Noise Environments
Found in: Multimedia and Expo, IEEE International Conference on
By Amit Chhetri, Jack Stokes, Dinei Florencio
Issue Date:July 2006
pp. 905-908
Acoustic echo cancellation (AEC) is highly imperative for enhanced communication in noisy environments such as a car or a conference room. In this work, we present a dualstructured AEC architecture that improves both the convergence time and misadjustment ...
PASS: Peer-Aware Silence Suppression for Internet Voice Conferences
Found in: Multimedia and Expo, IEEE International Conference on
By Xun Xu, Li-wei He, Dinei Florencio, Yong Rui
Issue Date:July 2006
pp. 2149-2152
A novel tandem-free solution for multiparty VoIP conferences called PASS (Peer-Aware Silence Suppression) is presented. Similar to traditional tandem-free solutions, PASS introduces a limit on the number of concurrent speakers in a conference. But in contr...
Painless migration from passwords to two factor authentication
Found in: Information Forensics and Security, IEEE International Workshop on
By Ziqing Mao,Dinei Florencio,Cormac Herley
Issue Date:December 2011
pp. 1-6
In spite of growing frequency and sophistication of attacks two factor authentication schemes have seen very limited adoption in the US, and passwords remain the single factor of authentication for most bank and brokerage accounts. Clearly the cost benefit...
Turning enemies into friends: Using reflections to improve sound source localization
Found in: Multimedia and Expo, IEEE International Conference on
By Flavio Ribeiro, Demba Ba, Cha Zhang, Dinei Florencio
Issue Date:July 2010
pp. 731-736
Sound Source Localization (SSL) based on microphone arrays has numerous applications, and has received significant research attention. Common to all published research is the observation that the accuracy of SSL degrades with reverberation. Indeed, early (...
Multiview video compression and streaming based on predicted viewer position
Found in: Acoustics, Speech, and Signal Processing, IEEE International Conference on
By Dinei Florencio, Cha Zhang
Issue Date:April 2009
pp. 657-660
Recent technological advances have made possible a number of new applications in the area of 3D video. One of the enabling technologies for many of these 3D applications is multiview video coding, which has received significant attention in the last severa...
Background recovery from video sequences using motion parameters
Found in: Acoustics, Speech, and Signal Processing, IEEE International Conference on
By Srenivas Varadarajan, Lina J. Karam, Dinei Florencio
Issue Date:April 2009
pp. 989-992
This paper presents a novel scheme for extracting a still background occluded by a number of foreground objects, moving in different directions and velocities in a video sequence, such that every background pixel is exposed in at least one of the frames. E...
Can the sample being transmitted be used to refine its own PDF estimate?
Found in: Data Compression Conference
By Dinei A. FlorĂȘncio, Patrice Simard
Issue Date:March 2003
pp. 233
Many image coders map the input image to a transform domain, and encode coefficients in that domain. Usually, encoders use previously transmitted samples to help estimate the probabilities for the next sample to be encoded. This backward probability estima...
Message from ICME'11 technical program chairs
Found in: Multimedia and Expo, IEEE International Conference on
By Jin Li,Dinei Florencio,Philippe Salembier,Mohamed Hefeeda,Alexander Loui,Sethuraman Panchanathan
Issue Date:July 2011
pp. 1-2
On behalf of the ICME 2011 Technical Program Committee, we warmly welcome you to Barcelona. ICME has been a flagship international conference for the presentation of novel and fundamental advances in the field of Multimedia Research since 2000. It is spons...
Personal 3D audio system with loudspeakers
Found in: Multimedia and Expo, IEEE International Conference on
By Myung-Suk Song, Cha Zhang, Dinei Florencio, Hong-Goo Kang
Issue Date:July 2010
pp. 1600-1605
Traditional 3D audio systems often have a limited sweet spot for the user to perceive 3D effects successfully. In this paper, we present a personal 3D audio system with loudspeakers that has unlimited sweet spots. The idea is to have a camera track the use...
KLASSP: Entering Passwords on a Spyware Infected Machine Using a Shared-Secret Proxy
Found in: Computer Security Applications Conference, Annual
By Dinei Florencio, Cormac Herley
Issue Date:December 2006
pp. 67-76
In this paper we examine the problem of entering sensitive data, such as passwords, from an untrusted machine. By untrusted we mean that it is suspected to be infected with spyware which snoops on the user?s activity. Using such a machine is obviously unde...
A large-scale study of web password habits
Found in: Proceedings of the 16th international conference on World Wide Web (WWW '07)
By Cormac Herley, Dinei Florencio
Issue Date:May 2007
pp. 657-666
We report the results of a large scale study of password use andpassword re-use habits. The study involved half a million users over athree month period. A client component on users' machines recorded a variety of password strength, usage and frequency met...