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TEXT-SPEECH PPT.pptx

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TEXT-SPEECH PPT.pptx

  1. 1. 7TH SEMESTER SEMINAR NAME:NADIMINTI SAROJA KUMAR ROLL NUMBER:12EEE032 REGISTRATION NUMBER:1201210503 BRANCH:ELECTRICAL & ELECTRONICS ENGINEERING(EEE) 27TH JULY 2K15 1 TEXT TO VOICE SYNTHESIS
  2. 2. CONTENTS:- 1. Introduction to speech synthesis 2. Disadvantages of braille system 3. Introduction to voice stick device 4. Working principle 5. Advantages 6. Applications 7. Further research & development 7TH SEMESTER SEMINAR 27TH JULY 2K15
  3. 3. INTRODUCTION TO SPEECH SYNTHESYS:- • What is speech synthesis? – Computer technology that 'constructs' human speech from electronic circuits to replace pre-recorded human voice. • What is the task? –Generating natural sounding speech on the fly, usually from text. – It is used to translate written information into aural information where it is more convenient. • What are the main difficulties? – What to say and how to say. 7TH SEMESTER SEMINAR 27TH JULY 2K15
  4. 4. 7TH SEMESTER SEMINAR 27TH JULY 2K15 2 Disadvadvantages of Braille system: • Errors cannot be erased. • It is more costly. • Non availability of each type of books. • Not possible to make articles, newspapers etc. • Cannot be read by a sighted person who has not learned it.
  5. 5. 7TH SEMESTER SEMINAR 27TH JULY 2K15 3 INTRODUCTION TO VOICE STICK DEVICE:- ➢ It is a text scanning device for the visually impaired people. ➢ The stick when scanned in the printed letters, the OCR function recognizes the text and converts the information into voice. ➢ The voice is then read back and thus helping the visually challenged person. ➢ It can read books, e-mails, atms, etc. with a perfect sound.
  6. 6. 7TH SEMESTER SEMINAR 27TH JULY 2K15 4 Working principle:- ➢ The speech synthesis is often known as text to speech (TTS) system. ➢It usually consist of two parts: ▪ First it takes the raw text and converts latters, numbers etc into their written-out word equivalents. This process is often called text normalization, pre-processing, or tokenization. ▪ Then it assigns phonetic transcriptions to each word, and divides and marks the text into various linguistic units like phrases, clauses, and sentences. ▪ In second it takes the symbolic linguistic representation and converts it into actual sound output.
  7. 7. 7TH SEMESTER SEMINAR 27TH JULY 2K15 Text-to-phoneme module Architecture of TTS systems: Text input Grapheme-to- phoneme conversion Prosodic modelling Acoustic synthesis Abbreviation lexicon Text in orthographic form Exceptions lexicon Orthographic rules Phoneme string Normalization Grammar rules Phoneme string + prosodic annotation Prosodic model Synthetic speech output Phoneme-to-speech module Various methods
  8. 8. 7TH SEMESTER SEMINAR 27TH JULY 2K15 5 o Easy to operate. o Provides nearly natural sound. o More accuracy in medical systems. o It reduces the human effort in the case of any application. o It provides talking machines for vocally impaired or deaf people and better aids for speech therapy. ADVANTAGES:-
  9. 9. 7TH SEMESTER SEMINAR 27TH JULY 2K15 6 APPLICATIONS:- ✓Speech synthesis walking device for blind. ✓Automatic reading of computer screen. ✓Voice operating mode in smart phones. ✓Voice controlled vehicle. ✓Railway announcement. ✓Robotics. etc
  10. 10. 7TH SEMESTER SEMINAR 27TH JULY 2K15 7 RESEARCH & DEVELOPMENT:-
  11. 11. 7TH SEMESTER SEMINAR 27TH JULY 2K15 10 REFERENCES:- http://www.microsoft.com/msagent/downloads/user.asp http://www.bytecool.com/voices.htm http://www.digitalfuturesoft.com/texttospeechproducts.php http://www.neospeech.com/product/technologies/tts.php http://nextup.com/TextAloud/SpeechEngine/voices.html#mo refreevoices
  12. 12. 7TH SEMESTER SEMINAR 27TH JULY 2K15 12

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