How to reject out-of-vocabulary utterances?

Tagged: error, install, recognition

This topic has 2 voices, contains 4 replies, and was last updated by Halle 168 days ago.

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December 1, 2011 at 10:59 am #8198
jerry	e.g in the “.languagemodel”there are [eat, fat, love], when I said [ear], it will return [eat]. but I want to get a null result. what should I do？thanks! This reply was modified 169 days ago by Halle. Reason: Edited title for more specificity
December 1, 2011 at 1:00 pm #8199
Halle	Hi Jerry, This is the OOV utterance problem — here is the relevant Pocketsphinx FAQ entry: http://cmusphinx.sourceforge.net/wiki/faq#qcan_pocketsphinx_reject_out-of-grammar_words_and_noises
December 1, 2011 at 1:33 pm #8203
jerry	Thank you! I will see that. ^_^ hi! I saw the doc .But It’s difficult to understood for this: “However, since a phone loop should give us better rejection than confidence scores, I propose that we implement a phone loop in the FlatLinguist as a first attempt. It should be fairly easy to expand the unknown word <unk> into an all-phone self-looping network. As a starter, context-independent phones will be used, since context-dependency was shown to not matter in this case. If a result contains the <unk> word, the utterance can possibly be out-of-grammar. We leave it to the application developer to determine that. “. 1.what the “phone loop” mean? 2.how to use “<unk>“? Is there a sampleCode for Implementation Details? thx a lot~
December 2, 2011 at 7:50 am #8209
jerry	hi Halle, I saw the doc .But It’s difficult to understood for this: “However, since a phone loop should give us better rejection than confidence scores, I propose that we implement a phone loop in the FlatLinguist as a first attempt. It should be fairly easy to expand the unknown word <unk> into an all-phone self-looping network. As a starter, context-independent phones will be used, since context-dependency was shown to not matter in this case. If a result contains the <unk> word, the utterance can possibly be out-of-grammar. We leave it to the application developer to determine that. “. 1.what the “phone loop” mean? 2.how to use “<unk>“? Is there a sampleCode for Implementation Details? thx a lot~
December 2, 2011 at 9:31 am #8211
Halle	Hi Jerry, Since these are questions about the implementation of Pocketsphinx it would be better to ask them at the CMU Sphinx site.

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