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...
- Wyllian B. da Silva
- Keiko V. O. Fonseca
- Alexandre de A. P. Pohl
- Dirac
- H.264/AVC
- Digital TV
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...
- Elloá B. Guedes
- Francisco M. de Assis
- Bernardo Lula Jr.
- Blum-Micali Generator
- Quantum Attack
- Grover Algorithm
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...
- Maria Leopoldina M. N. S. Gonçalves
- Renato Baldini Filho
- Quaternary LDPC code
- OFDM
- frequencyselective fading
SBrT 2010
Rank codes – the State of Art
The State of Art for rank codes is presented. The theory and applications are considered.
- Ernst M. Gabidulin
- rank metric
- matrix rank code
- vector rank code
- random rank error
- rank row erasure
- rank column erasure
- fast decoding algorithm
- space-time code
- network coding
- public-key cryptography
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...
- Daiana Nascimento Muniz
- Franco A. dos S. Pezzini
- Richard Demo Souza
- Cecilio Pimentel
SBrT 2010