Speech Recognition - Performance

Performance

The performance of speech recognition systems is usually evaluated in terms of accuracy and speed. Accuracy is usually rated with word error rate (WER), whereas speed is measured with the real time factor. Other measures of accuracy include Single Word Error Rate (SWER) and Command Success Rate (CSR).
However, speech recognition (by a machine) is a very complex problem. Vocalizations vary in terms of accent, pronunciation, articulation, roughness, nasality, pitch, volume, and speed. Speech is distorted by a background noise and echoes, electrical characteristics. Accuracy of speech recognition vary with the following:

  • Vocabulary size and confusability
  • Speaker dependence vs. independence
  • Isolated, discontinuous, or continuous speech
  • Task and language constraints
  • Read vs. spontaneous speech
  • Adverse conditions

Robot Interaction Language (ROILA) is a constructed language created to address the problems associated with speech interaction using natural languages. ROILA is constructed on the basis of two important goals, firstly it should be learnable by the human user and secondly, the language should be optimized for efficient recognition by a robot.

Read more about this topic:  Speech Recognition

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