10th Annual Conference of the International Speech Communication Association

Brighton, United Kingdom
September 6-10, 2009

An Indexing Weight for Voice-to-Text Search

Chen Liu

Motorola, USA

The TF-IDF (term frequency-inverse document frequency) weight is a well-known indexing weight in information retrieval and text mining. However, it is not suitable for the increasingly popular voiceto- text search, as it does not take into account the impact of voice in the search process. We propose a method for calculating a new indexing weight, which is used as guidance for selection of suitable queries for voice-to-text search. In designing the new weight, we combine prominence factors from both the text and acoustic domains. Experimental results show significant improvement in the average search success rate with the new indexing weight.

Full Paper

Bibliographic reference.  Liu, Chen (2009): "An indexing weight for voice-to-text search", In INTERSPEECH-2009, 3051-3054.