15. A computing device for recognizing a received phoneme, the computing device comprising: a module configured to generate an expanded received-signal vector from a received signal vector associated with a received phoneme; a module configured to transform the expanded received-signal vector into an orthogonal form associated with a hypersphere having a center and a radius; a module configured to determine a first distance associated with the orthogonal form of the expanded received-signal vector and a second distance associated with each orthogonal form of expanded stored phoneme vectors; and a module configured to recognize the received phoneme according to a comparison of the first distance with the second distance.
15. A computing device for recognizing a received phoneme, the computing device comprising: a module configured to generate an expanded received-signal vector from a received signal vector associated with a received phoneme; a module configured to transform the expanded received-signal vector into an orthogonal form associated with a hypersphere having a center and a radius; a module configured to determine a first distance associated with the orthogonal form of the expanded received-signal vector and a second distance associated with each orthogonal form of expanded stored phoneme vectors; and a module configured to recognize the received phoneme according to a comparison of the first distance with the second distance. 20. The computing device of claim 15 , wherein the module configured to determine a distance associated with the orthogonal form of the expanded received-signal vector and each orthogonal form of the expanded stored-phoneme vectors further: determines a difference between the distance from the center of the hypersphere of the orthogonal form of the expanded received-signal vector and the distance from the center of the hypersphere for each orthogonal form of the expanded stored-phoneme vectors, wherein the expanded stored-phoneme vectors associated with m-shortest differences between the distance from the center of the hypersphere of the orthogonal form of the expanded received-signal vector and the distance from the center of the hypersphere for each orthogonal form of the expanded stored-phoneme vectors are recognized as most likely to be associated with the received phoneme.