AI Case Study

Cereproc generates synthetic speech from text using natural language processing and machine learning

Cereproc uses AI to generate speech from text using Deep networks and can personalize (and copy the original) voices of users which has therapeutic implications for some patients.

Industry

Technology

Software And It Services

Project Overview

"CereProc has developed a core speech synthesis engine, CereVoice.

CereProc's unit selection voices are built from large databases of recorded speech, during database creation, each recorded utterance is segmented into some or all of the following: individual phones, syllables, morphemes, words, phrases, and sentences. The division into segments is done using a specially modified speech recognizer.[1] An index of the units in the speech database is then created based on the segmentation and acoustic parameters like the fundamental frequency (pitch), duration, position in the syllable, and neighbouring phones. At runtime, the desired target utterance is created by determining the best chain of candidate units from the database (unit selection). Unit selection provides the greatest naturalness, because it applies digital signal processing (DSP) to the recorded speech only at concatenation points. DSP often makes recorded speech sound less natural.

CereProc's parametric voices produce speech synthesis based on statistical modelling methodologies; in this system, the frequency spectrum (vocal tract), fundamental frequency (vocal source), and duration (prosody) of speech are modelled simultaneously. Speech waveforms are generated from these parameters using a vocoder. Critically, these voices can be built from significantly less recorded speech than unit selection voices and have a much smaller footprint when installed, because of this they are used for private voice cloning."

Reported Results

The company claims that it has delivered automated text to speech conversion, enabling those with speech deficiencies to talk in their original voice

Technology

Function

R And D

Product Development

Background

Cereproc has developed text-to-speech voice creation system

Benefits

Data