Numerical Text-to-Speech Synthesis System Presentation By: Sevakula Rahul Kumar

Presentation Outline Introduction Background 3 Components of TTS System –Text Pre-processing –Prosody –Concatenation What has been done / Future Work Questions

What is a TTS System? Definition: A system which takes as input a sequence of words and converts them to speech Applications: Services for the hearing impaired Reading aloud Commercial TTS Systems: Festival Bell Labs TTS

TTS System Fundamental Components Text Pre-processing ProsodyConcatenation words

Numerical Text Pre-Processing Input –A number (integer) Output –Identification of each digit with their corresponding values Objective –Perform the analysis of the number –To identify which all speech signals are to be used from the database and in what order they are to be concatenated.

Numerical Text Pre-Processing (Block Diagram) Number Converter Database of speech Digit to Speech Translator with corresponding values

Number Converter The numerals with their textual versions 100 one hundred Handle fractional and decimal numbers 0.25 point two five Implementation – Simple Search Algorithm in MATLAB using string function – ‘strcpy’

Concatenation Individual Digit and positionComplete Number Concatenating arrays of sampled data of the required speech signals Converting the resultant sampled data again into speech.

Acoustic Manipulation - MATLAB Recognizes wave files (.WAV) –Load or read, write Vast array of signal processing tools Built-in functions Ease of debugging

Progress Till First Minor Work Completed / Current Status –Partial Text Pre-processing for any integer where individual digit is recognised one after another, without considering their value in the entire number. –Since it is a number, no prosodic manipulation was required. –Concatenation. Work To Be Done –Complete Text Pre-processing. –Speech synthesis of any sized floating point numbers.

Progress Since First Minor Work Completed –Complete Text Pre-processing. –Speech Synthesis of Floating Point Numbers Work To Be Done –Speech synthesis of any sized floating point numbers.

Result – Synthesized Speech Signal’s Waveform:

Questions ?