speech recognition full report

[computer science technology]

[attachment=1403]Submitted by:
Speech Recognition
Aditi.P
Swathi.Ch

SPEECH RECOGNITION

Abstract:
Language is man's most important means of communication and speech its primary medium. Speech provides an international forum for communication among researchers in the disciplines that contribute to our understanding of the production, perception, processing, learning and use. Spoken interaction both between human interlocutors and between humans and machines is inescapably embedded in the laws and conditions of Communication, which comprise the encoding and decoding of meaning as well as the mere transmission of messages over an acoustical channel. Here we deal with this interaction between the man and machine through synthesis and recognition applications. The paper dwells on the speech technology and conversion of speech into analog and digital waveforms which is understood by the machines Speech recognition, or speech-to-text, involves capturing and digitizing the sound waves, converting them to basic language units or phonemes, constructing words from phonemes, and contextually analyzing the words to ensure correct spelling for words that sound alike. Speech Recognition is the ability of a computer to recognize general, naturally flowing utterances from a wide variety of users. It recognizes the caller's answers to move along the flow of the call. We have emphasized on the modeling of speech units and grammar on the basis of Hidden Markov Model. Speech Recognition allows you to provide input to an application with your voice. The applications and limitations on this subject has enlightened us upon the impact of speech processing in our modern technical field. While there is still much room for improvement, current speech recognition systems have remarkable performance. We are only humans, but as we develop this technology and build remarkable changes we attain certain achievements. Rather than asking what is still deficient, we ask instead what should be done to make it efficient¦.
INTRODUCTION
One of the most important inventions of the nineteenth century was the telephone. Then at the midpoint of twentieth century, the invention of the digital computer amplified the power of our minds, enabled us to think and work more efficiently and made us more imaginative then we could ever have imagined .now several new technologies have empowered us to teach computers to talk to us in our native languages and to listen to us when we speak(recognition); haltingly computers have begun to understand what we say. Having given our computers both oral and aural abilities, we have been able to produce innumerable computer applications that further enhance our productivity. Such capabilities enable us to route phone calls automatically and to obtain and update computer based information by telephone, using a group of activities collectively referred to as Voice Processing.
SPEECH TECHNOLOGY
Three primary speech technologies are used in voice processing applications: stored speech, text-to “ speech and speech recognition . Stored speech involves the production of computer speech from an actual human voice that is stored in a computer™s memory and used in any of several ways. Speech can also be synthesized from plain text in a process known as text-to “ speech which also enables voice processing applications to read from textual database.