![]() Eventually that started to be a bit too complicated for most, and somewhere along the line we switched to trying to represent the sounds of the words that we used. Most early forms of writing seem to have been pictographic. I have a master's in linguistics, specialising in speech processing and the like, and I don't really believe in phonemes. ![]() Two companies offer a demo on the internet: ATT and Scansoft (former L&H) and Given that the cost of developing a database for corpus synthesis may be orders of magnitude higher than for dyphone synthesis, there are very few companies that make them. This approach gives naturally sounding results for short sentences where intonation is not so important Such a database is used to extract the best and the longest sequence of dyphones during the production. corpus-based synthesis takes a different approach where a large database of several hours of speech is recorded and manually labelled to mark the start and end of each sound.Dyphone-based synthesis will hardly sound better that in Festival because dyphones have to be modified artificially to fit every variation of pitch, duration and any other parameter that is needed to produce a given phrase. dyphone-based synthesis where the database contains one dyphone (end of first sound + start of next sound) for each psossible sound combination.There are basicaly two TTS technologies on the market:
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