Method and system for improved speech recognition by degrading utterance pronunciations

摘要

A speech recognition system ( 10 ) or method ( 20 ) can include a speech input device and a processor ( 14 ) coupled to the speech input. The processor can be programmed to identify ( 22 ) a plurality of words that are members of confusable pairs of words where each pair includes a target word and a substituted word. The processor can degrade ( 24 ) a pronunciation of the substituted word to provide a worse pronunciation of the substituted word. The processor can further compare ( 28 ) the pronunciation of the target word with the worse pronunciation to the substituted word. The processor can be further programmed to reduce ( 26 ) confusion between the substituted word and other words in a recognition grammar of the speech recognition engine and can also narrow the scope within which the substituted word is recognized.