Methods and apparatuses for automatic speech recognition

摘要

Exemplary embodiments of methods and apparatuses for automatic speech recognition are described. First model parameters associated with a first representation of an input signal are generated. The first representation of the input signal is a discrete parameter representation. Second model parameters associated with a second representation of the input signal are generated. The second representation of the input signal includes a continuous parameter representation of residuals of the input signal. The first representation of the input signal includes discrete parameters representing first portions of the input signal. The second representation includes discrete parameters representing second portions of the input signal that are smaller than the first portions. Third model parameters are generated to couple the first representation of the input signal with the second representation of the input signal. The first representation and the second representation of the input signal are mapped into a vector space.

主权项

1. A machine implemented method to perform speech recognition, comprising:
receiving first portions of an acoustic signal; determining a likelihood of a recovered first parameter sequence representing the first portions of the acoustic signal; determining a likelihood of a recovered second parameter sequence associated with the recovered first parameter sequence, wherein the second parameter sequence represents second portions of the acoustic signal having a coarser granularity than the first portions; determining a likelihood of a recovered word sequence based on the recovered second parameter sequence; and outputting the recovered word sequence.