Auto Speech Recognition
Outline-1
Introduction
Today and Future of ASR
Future of ASR
Types of ASR Systems
Fundamentals
Fundamentals Cont.
Acoustic Model
Acoustic Models Cont.
Acoustic Analysis & Alignment
Time Alignment
Output: Text
Evaluation
Google Search by Voice
Outline-2
History of Voice Search
History of Voice Search
Metrics
Modelling
Acoustic Modelling
Evaluation of Evolution
Language Model
Specialized Text Normalization
Data Size
Performance Analysis
Locality
Summary
References

Metrics

Important because they define the goal of a developed system Alter your parameters/methods based on metrics Metrics used to evaluate systems: Word Error Rate (WER) Semantic Quality (WebScore) Perplexity (PPL) Out-of-vocabulary rate (OOV) Latency