Patent ID: 8108205

Claim:
A speech recognition method comprising: recognizing, by a processor, a user utterance using a context-free grammar (CFG) as a language model; identifying, by the processor, out-of-grammar (OOG) utterances that are not recognizable by the CFG; processing, by the processor, the OOG utterances through a back-off grammar (BOG) that is derived from the CFG and that includes a plurality of BOG rules; collecting statistics related to a degree of success of the plurality of BOG rules in processing the OOG utterances and statistics related to a frequency of each of the plurality of BOG rules being considered a top recognition result; utilizing a dictation grammar to selectively transcribe a portion of the OOG utterances based at least in part on the collected statistics; and incorporating the transcribed portion of the OOG utterances into the CFG.