Feature-Table-Based Automatic Question Generation for Tree-Based State Tying: A Practical Implementation
نویسندگان
چکیده
This paper presents a system for automatically generating linguistic questions based on a feature table. Such questions are an essential input for tree-based state tying, a technique which is widely used in speech recognition. In general, in order to utilize this technique, linguistic (or more accurately phonetic) questions have to be carefully defined. This may be extremely time consuming and require a considerable amount of resources. The system proposed in this paper provides a more elegant and efficient way to generate a set of questions from a simple feature table of the type employed in phonetic studies.
منابع مشابه
Automatic Question Generation for HMM State Tying using a Feature Table
Generally, speech recognition systems use context-dependent subword units for recognition. To utilize these units, tree-based state tying is an unavoidable technique. This tying applies linguistic questions to group these units and ties them accordingly. These questions usually require an expensive resource-consumption manual procedure. Even though this problem has been addressed by data-driven...
متن کاملComparison among Various Question Generations for Decision Tree Based State Tying in Persian Language
Performance of any continuous speech recognition system is highly dependent on performance of the acoustic models. Generally, development of the robust spoken language technology relies on the availability of large amounts of data. Common way to cope with little data for training each state of Markov models is treebased state tying. This tying method applies contextual questions to tie states. ...
متن کاملAutomatic question generation for decision tree based state tying
Decision tree based state tying uses so-called phonetic questions to assign triphone states to reasonable acoustic models. These phonetic questions are in fact phonetic categories such as vowels, plosives or fricatives. The assumption behind this is that context phonemes which belong to the same phonetic class have a similar influence on the pronunciation of a phoneme. For a new phoneme set, wh...
متن کاملAccessing Language Specific Linguistic Information for Triphone Model Generation: Feature Tables in a Speech Recognition System
This paper is concerned with a novel methodology for generating phonetic questions used in tree-based state tying for speech recognition. In order to implement a speech recognition system, language-dependent knowledge which goes beyond annotated material is usually required. The approach presented here generates phonetic questions for decision trees are based on a feature table that summarizes ...
متن کاملTriphone tying techniques combining a-priori rules and data driven methods
Tying of Hidden Markov Model states is an important issue for the use of triphones as modeling units in automatic speech recognition systems. This paper studies the application of a–priori rules for tying in combination with data driven methods. The baseline method features a combination of a–priori rules that reduce the theoretical number of units by an oder of magnitude and a simple back–off ...
متن کامل