Single Channel Enhancement for Speech Recognition

Single channel speech enhancement has been an active field of research for several decades. The majority of research has focused on human perceptions of quality and intelligibility. Nevertheless, such algorithms can be applied directly to the noise-robust speech recognition problem with some success. More gain can be achieved by creating domain-specific solutions that are modeled on the more traditional enhancement algorithms. This paper covers the major pieces necessary for a modern single channel enhancement system suitable for automatic speech recognition.