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Sociedade Brasileira de Telecomunicações

2010 - VII International Telecommunications Symposium

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

Quantum Permanent Compromise Attack to Blum-Micali Pseudorandom Generator

This paper presents a quantum permanent compromise attack to the Blum-Micali pseudorandom generator whose security is based on the assumption of intractabil...

SBrT 2010

Quaternary LDPC Codes on OFDM Systems

This paper evaluates the performance of quaternary LDPC codes associated to OFDM systems. The LDPC codes are based on a ring Z4 of integers modulo-4. Each...

SBrT 2010

Rank codes – the State of Art

The State of Art for rank codes is presented. The theory and applications are considered.

SBrT 2010

Reduced Complexity Viterbi Decoding Based on the M-Algorithm and the Minimal

In this paper we propose sub-optimum, reduced complexity decoding algorithms for convolutional codes. The algorithms are based on the minimal trellis repre...

SBrT 2010