Ick-sang Han

Method, medium, and apparatus recognizing speech considering similarity between the lengths of phonemes

An apparatus, medium, and method recognizing speech. The method may include the calculating of scores indicating the degree of similarity between a characteristic of an input speech and characteristics of speech models based on the degree of similarity between the length of each phoneme included in an input speech and the length of phonemes included in each speech model, and determining a speech model with the highest score among the scores to be the corresponding recognized speech for the input speech. By doing so, the speech recognition rate may be greatly enhanced and when an input speech includes continuous identical phonemes the word error rate (WER) may be greatly reduced.

Fast multimedia contents retrieval by partially spoken query

We present novel fast multi-pass decoding strategies for recognizing large named-entities on a low-resource embedded device and thus retrieving MP3 music using spoken query, which contains partial segments of whole music titles and artists. After acoustic-phonetic decoding in the first stage processing, we incorporate word boundary information with phonetic confusion matrix into next stage partial word matching. Then, we rescore candidate phone lists using more complex context-dependent acoustic model, whose outputs are the retrieved songs. We tested our retrieval system to the task of retrieving 1000 songs on a commercial MP3 player and could achieve about 15.5% relative improvements in response time over conventional frame-based multi-pass decoding method without sacrificing recognition rates.