Hulan-2013-09-27

ASR

ASR Kernel development

[ASR group weekly report]

TTS

• EST format learned.
• Check details of each option.

Dialog system

• MH, RY help compose 60 questions, which are being used for testing.
• Conducting the initial experiment:

1. Using 9k dim TF/IDF, compose feature vectors for each query, each answer. Mach the TF/IDF of query+answer to match the TF/IDF of new queries. Add the scores of the Cosine score of the match with queries and answers directly.

• CER: 8.3%
• Query time: very slow

1. Remove 506 stop words. No significant change on CER & Query time.

1. Fast match by listing the words only in the query & answer as the feature, and matching by order to speed up the score calculation.

1. Hierarchical matching. First split all the answers to 11 top-level categories, and then split them into 1030 second-level categories. query+answer TF/IDF score.

• CER: top-category: 6.7%, second-level category: 18.3%
• Query time: 6/sec

1. Keep two top-level categories, try to reduce top-level errors:

• CER: two top-category, no errors. second-level category: still on going

Next week:

• Reverse index-based fast match, on going.