Method and apparatus employing Viterbi scoring using SIMD instructions for data recognition
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United States of America Patent
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May 12, 1998
Grant Date -
N/A
app pub date -
Jun 1, 1995
filing date -
Jun 1, 1995
priority date (Note) -
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Abstract
A computer system includes a single instruction multiple data (SIMD) instruction set. At a first observation time, a first SIMD instruction is used to determine a first plurality of probabilities for the stochastic model to be in a certain set of states after transitioning via a first set of transitions. A second SIMD instruction is used to determine a second plurality of probabilities for the stochastic model to be in the same set of states after transitioning via a second set of transitions. A third SIMD instruction is used to compare the results of the first two SIMD instructions to determine a set of intermediate probabilities. Another SIMD instruction adds a set of distribution probabilities to the set of intermediate probabilities. A new way of organizing the distribution probabilities in memory enables use of the SIMD instructions. The steps are repeated for other observation times to determine a final probability of a multimedia observation matching a multimedia stochastic model.
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