2010 - VII International Telecommunications Symposium
A Traffic Policing Mechanism for Wimax Systems Based on Multifractal Modeling
In this paper, we analyze the queueing performance in terms of loss rate of an OFDM (Orthogonal FrequencyDivision Multiplexing)/TDMA(Time Division Multiplex...
- Josemar A. Santos Jr
- Flávio G. C. Rocha
- Flávio H. T. Vieira
- Multifractal Traffic
- IEEE 802.16
- Policing algorithms
- Wireless Traffic
SBrT 2010
Mean Weight Behavior for the Generalized Subband Decomposition LMS Algorithm
This paper presents an improved stochastic model for the generalized subband decomposition least-mean-square (GSD-LMS) algorithm. This algorithm is used as...
- Javier E. Kolodziej
- Orlando J. Tobias
- Rui Seara
- Averaging principle
- least-mean-square (LMS) algorithm
- mean weight behavior
- subband adaptive filters
SBrT 2010
Lossless Multi-Grid Chain Code with Optimized Cell Usage for Contour Description of Visual Objects
In the context of object-based image compression, shape encoders that describe the contour of the objects, called chain codes, tend to be more efficient th...
- Fabiana O. P. Fernandes
- Willian G. de Almeida
- Flávia M. Freitas
- Abraham Alcaim
- shape encoding
- object-based image compression
- MPEG-4
- chain code
- grid cell
SBrT 2010
An Adequate Objective Performance Evaluation of Dirac Video Codec Compared to H.264/AVC
Dirac, a relevant new open wavelet-based video codec, has been released recently. The main contribution of this paper is an adequate performance evaluation...
- André F. de Araujo
- Yuzo Iano
- Rangel Arthur
- Dirac video codec
- H.264; Video Coding
- Vide Compression
- Wavelet-based video coding
SBrT 2010
Providing Higher Entropy Cryptographic Keys by the Use of Biometrics
In this paper modifications are investigated to a previously introduced Key Regeneration system used to obtain cryptographic keys from biometric data, spec...
- D. P. B. A. Camara
- V. C. da Rocha Jr.
- Biometrics
- cryptography
- error-correcting codes
- security
SBrT 2010