Exploring the Null Space of the Acoustic-to-Articulatory Inversion Using a Hypercube Codebook
Identifieur interne : 005E31 ( Hal/Checkpoint ); précédent : 005E30; suivant : 005E32Exploring the Null Space of the Acoustic-to-Articulatory Inversion Using a Hypercube Codebook
Auteurs : Slim Ouni [France] ; Yves Laprie [France]Source :
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Abstract
Our acoustic to articulatory inversion method exploits an original codebook representing the articulatory space by hypercubes. The articulatory space is decomposed into regions where the articulatory-to-acoustic mapping is linear. Each region is represented by a hypercube. The inversion procedure retrieves articulatory vectors corresponding to an acoustic entry from the hypercube codebook. The main issue is about how all the possible inverse solutions in a given hypercube could be found. As the dimension of the articulatory space is greater than the dimension of the acoustic space, the corresponding null space is sampled by linear programming to retrieve all the possible solutions. Indeed, the sampling of the null space is a crucial point because it directly controls the smoothness of articulatory trajectories recovered from the original signal. This approach permits more realistic articulatory trajectories to be obtained.
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Hal:inria-00100540Le document en format XML
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<front><div type="abstract" xml:lang="en">Our acoustic to articulatory inversion method exploits an original codebook representing the articulatory space by hypercubes. The articulatory space is decomposed into regions where the articulatory-to-acoustic mapping is linear. Each region is represented by a hypercube. The inversion procedure retrieves articulatory vectors corresponding to an acoustic entry from the hypercube codebook. The main issue is about how all the possible inverse solutions in a given hypercube could be found. As the dimension of the articulatory space is greater than the dimension of the acoustic space, the corresponding null space is sampled by linear programming to retrieve all the possible solutions. Indeed, the sampling of the null space is a crucial point because it directly controls the smoothness of articulatory trajectories recovered from the original signal. This approach permits more realistic articulatory trajectories to be obtained.</div>
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<hal api="V3"><titleStmt><title xml:lang="en">Exploring the Null Space of the Acoustic-to-Articulatory Inversion Using a Hypercube Codebook</title>
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<surname>Ouni</surname>
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<author role="aut"><persName><forename type="first">Yves</forename>
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<term xml:lang="en">articulatoire</term>
<term xml:lang="en">acoustique</term>
<term xml:lang="en">parole</term>
<term xml:lang="en">codebook</term>
<term xml:lang="en">acoustic</term>
<term xml:lang="en">speech production</term>
<term xml:lang="en">production de la parole</term>
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<abstract xml:lang="en">Our acoustic to articulatory inversion method exploits an original codebook representing the articulatory space by hypercubes. The articulatory space is decomposed into regions where the articulatory-to-acoustic mapping is linear. Each region is represented by a hypercube. The inversion procedure retrieves articulatory vectors corresponding to an acoustic entry from the hypercube codebook. The main issue is about how all the possible inverse solutions in a given hypercube could be found. As the dimension of the articulatory space is greater than the dimension of the acoustic space, the corresponding null space is sampled by linear programming to retrieve all the possible solutions. Indeed, the sampling of the null space is a crucial point because it directly controls the smoothness of articulatory trajectories recovered from the original signal. This approach permits more realistic articulatory trajectories to be obtained.</abstract>
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