Hulan-2013-11-30

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ASR

ASR Kernel development

[ASR group weekly report]

TTS

  • This week
  • 5000 utterance training done.
  • 500 utterance TN recording done. Quality control is not very good. Resulting synthesis is not satisfied.
  • 41 WD utterance recording. Quality control fine. Adaptation done. Sounds OK.
  • Buzzy sound was investigated.The main source is the source model (excitation). STRAIGHT sounds better.
  • Next week
  • Developing CGI service.
  • Prepare to 2000 utt female record.

Dialog system

Statistical approach

  • HowNET information extracted. Coverage is limited. 50k words.
  • Custom task error analysis

There are totally 2000 errors. Investigated into 600 errors.

  • NULL query, 1.4%
  • English upper/lower mismatch. 1.6%
  • Traditional/Simple Chinese mismatch. 2.2%
  • High frequency of sub-important words, like taxing. 1.3%
  • Database labeling error (matched query is better than the labeled correct query). 21.8%
  • Stand query or query involve many unimportant words, leading to less TF/IDF. STOP words still impact. 10.7%
  • TF/IDF incorrectly weighted the matched terms. 3.9%
  • Synonym can not match. 36.5%
  • Category words can not match. 13.5%
  • Answer label incorrect. Semantic relationship missing. 6.8%
  • Word segmentation hide keywords. 4%
  • Vague query. None discriminative words after stop words purging. 1.6%

Template matching

  • Work on disambiguousness
  • Completed the prototype design for the QA logic
  • Develop an assistant tool for source code generation