Speech Recognition is one of the most complicated and highest technologies of our world which make our life more convenient and more attractive. Our company has produced continuous/isolated speech recognition engines based on HMM for both Persian and English. Effective methods for feature extractions, acoustic modeling, enhancing, searches and language models applied to the engines.
Our Sharif University of Technology researchers have developed variant fields of speech processing and NLP which some of them listed below:

• Continuous Speech Recognition
• Preprocessing of Signals
• Enhancement
• Voice Activity Detector(VAD)
• Distance Talking
• Speech Recognition on the phone
• Word Spotting
• Out Of Vocabulary (OOV)
• Natural Language Processing(NLP)
• Isolated Word Recognition(IWR)
• Lexicon Building
• Statistical and Grammatical Language Model
• Text To Speech (TTS)
• Pronunciation Measurement of Native vs. Non-native speakers
• Acoustic Modeling