Speech:Exp


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 * Experiments - List of speech experiments

Project Notes

 * Unix Notes
 * Active Directory
 * Backups
 * Network Bridge
 * Speech S/W Installation
 * Speech Corpus Setup
 * Switchboard Data Notes
 * [Experiment Setup]
 * Scripts Page
 * Model Building
 * Step 2: Run a Train
 * Step 2: Create the Language Model
 * Step 3: Run the Decode

''' NOTE: This page is currently in the process of getting re-formatted with updated information and more detailed guides of new scripts and processes. '''

What is an Experiment
This is a multi step process done in order to take sets of data in order to train and decode the data. By taking data the experiment is to achieve a low error rate by train and decoding the data.

What is a Train
We run a train in order to build an acoustic model for use in a decode. An acoustic model is created by taking audio recordings of speech, and their text transcriptions, and using software to create statistical representations of the sounds that make up each word. It is used by a speech recognition engine to recognize speech.The first thing the trainer does is verify that it has everything it needs to build a model. Checking to see if:

Transcript list is valid, it can find audio files the transcript references and vice versa. The experiment dictionary contains all the words used in the transcript. All Phones used in the dictionary are defined in the .phone file.

What is a Language Model
A language model is used to restrict word search. It defines which word could follow previously recognized words (remember that matching is a sequential process) and helps to significantly restrict the matching process by stripping words that are not probable. To reach a good accuracy rate, your language model must be very successful in search space restriction. This means it should be very good at predicting the next word. A language model usually restricts the vocabulary considered to the words it contains.

Archived Experiment Setup Pages
Archive 1 : This page was archived and replaced during spring 2014