Notes%20on%20ICASSP%202004

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Notes on ICASSP 2004

• Arthur Chan
• May 24, 2004

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This Presentation (5 pages)

• Brief note of ICASSP 2004
• NIST RT 04
• Evaluation results
• Other interesting things relate to CALO

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NIST RT 04 Meeting Transcription Headlines.

• Meeting Transcription
• A challenge to core technology, evaluation and
  resource preparation.
• Core technology
• Speaker Segmentation
• Speech to Text (STT)
• Evaluation
• New evaluation scheme is deviced for overlapped
  speech.
• Resource preparation
• LDC has a big headache in preparing the data.

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Speaker Segmentation

• Segmenting the speech
• Search for the number of speakers.
• Get speaker turns.
• Measured by Diarization rate.
• Insights (from ISL)
• More speakers the harder the task.
• A new measure called speaker speaking time
  entropy is proposed.

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STT

• Very hard task
• ICSI, ISL use the state of the art technology
• Constrained linear transform
• Discriminative training (DT-MAP)
• Speaker Adaptive Training.
• Individual headphone results WER 34.8 for
  non-overlapping speech.
• Some meeting is very hard. Many people is
  speaking at the same time.
• Trained on 4 different subset of data, ICSI data
  is just one of them (70 of the total)
• Insights
• (ICSI) feature-based technique doesnt help too
  much
• Multiple-distance microphones and array
  microphones techniques help.
• Conclusion we will also have a hard-time.

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Evaluation and Resource Preparation

• Evaluation
• Overlapped speech require different schemes for
  evaluation
• Will require multiple string matching. (Detail
  unknown yet.)
• Resource Preparation
• Currently, no tool can satisfy the need of
  transcribing multiple channels of speech with
  interaction
• Professional transcriber failed.

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Other interesting news from ICASSP related to CALO

• Project EARS
• Lightly supervised training
• 3000 hours close captioned speech is used
• Discriminative training is found to be useful for
  some sites.
• Others