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Sociedade Brasileira de Telecomunicações


Modulations for Large Signal Constellations Coming from Embedding of Complete Graph

The integrated system of data transmission, encoding, modulation and block channels are projected in dependent ways with the purpose of getting an integrate...

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...

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...

SBrT 2010


A speech database for the study of Lombard effect in Brazilian Portuguese

The Lombard effect is related to the change in the way people speak in noisy environments in order to compensate the degradation of the audio signal. There...

SBrT 2010


Traffic Influence in Distributed Networks Using Cooperation and Set-Membership Filtering

This paper investigates the influence of data loss in the performance of cooperative adaptive filters in distributed networks. The algorithms analyzed are...

SBrT 2010