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Sociedade Brasileira de Telecomunicações

2010 - VII International Telecommunications Symposium



Improving VoIP Quality over Satellite Transmission with Dynamic Bandwidth

This work presents a dynamic bandwidth allocation scheme for DVB-RCS satellite standard aiming to avoid the conflict that arise when VoIP transmission with ...

SBrT 2010


COLOR IMAGE QUALITY EVALUATION USING GRAYSCALE METRICS IN CIELAB COLOR SPACE

In many image applications the measurement of visual quality is of special importance. Most of the Full-Reference metrics proposed address the evaluation o...

SBrT 2010


Quality Performance of LD, SD and HD Video Encoded with Dirac and H.264/AVC

This paper compares the video quality performance of low definition (LD), standard definition (SD) and high definition (HD) video signals encoded with H.2...

SBrT 2010


A Linearly Constrained IQRD-RLS Algorithm for Blind Multiuser Detection in CDMA Systems

In this paper we propose an inverse QR decomposition based recursive least squares algorithm (IQRD-RLS) for the linearly constrained minimum variance (LCMV)...

SBrT 2010


Prediction-Based Coding of Speech Signals Using Multiscale Recurrent Patterns

This paper investigates the performance of the multidimensional multiscale parser (MMP) algorithm for speech coding. A new prediction-based scheme is cons...

SBrT 2010