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D2L (or Desire2Learn) is a Canada-based global software company with offices in Australia, Brazil, Europe, India, Singapore, and the United States.. D2L is the developer of the Brightspace learning management system, a cloud-based software suite used by schools, higher educational institutions, and businesses for online and blended classroom learning.
The Viterbi algorithm is named after Andrew Viterbi, who proposed it in 1967 as a decoding algorithm for convolutional codes over noisy digital communication links. [2] It has, however, a history of multiple invention, with at least seven independent discoveries, including those by Viterbi, Needleman and Wunsch, and Wagner and Fischer. [3]
Viterbi algorithm explanation with the focus on hardware implementation issues. r=1/6 k=15 coding for the Cassini mission to Saturn. Online Generator of optimized software Viterbi decoders (GPL). GPL Viterbi decoder software for four standard codes. Description of a k=24 Viterbi decoder, believed to be the largest ever in practical use.
Andrew James Viterbi (born Andrea Giacomo Viterbi, March 9, 1935) is an electrical engineer and businessman who co-founded Qualcomm Inc. and invented the Viterbi algorithm. He is the Presidential Chair Professor of Electrical Engineering at the University of Southern California's Viterbi School of Engineering , which was named in his honor in ...
To convolutionally encode data, start with k memory registers, each holding one input bit.Unless otherwise specified, all memory registers start with a value of 0. The encoder has n modulo-2 adders (a modulo 2 adder can be implemented with a single Boolean XOR gate, where the logic is: 0+0 = 0, 0+1 = 1, 1+0 = 1, 1+1 = 0), and n generator polynomials — one for each adder (see figure below).
For example, neither "forward algorithm" nor "Viterbi" appear in the Cambridge encyclopedia of mathematics. The main observation to take away from these algorithms is how to organize Bayesian updates and inference to be computationally efficient in the context of directed graphs of variables (see sum-product networks ).
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ISI headquarters in Marina del Rey, CA. The USC Information Sciences Institute (ISI) is a component of the University of Southern California (USC) Viterbi School of Engineering, and specializes in research and development in information processing, computing, and communications technologies.