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What is Text-To-Speech (TTS)?

June 14, 2024

Text-To-Speech (TTS) is an technology that converts written text into spoken words. It allows computers and other digital devices to read aloud the text displayed on a screen, providing an auditory output that can be understood by humans. TTS systems are widely used in various applications, from assistive technologies for the visually impaired to virtual assistants like Siri and Alexa.

At its core, TTS works by first analyzing the text to understand its structure and meaning. It then uses linguistic algorithms to determine the correct pronunciation, intonation, and rhythm. Advanced TTS systems leverage deep learning and neural networks to produce more natural-sounding speech, mimicking human inflections and tones. These systems can handle different languages, accents, and even emotional nuances, making the speech output more lifelike and engaging.

One of the key components of TTS technology is the speech synthesis engine. This engine uses recorded human voices (concatenative synthesis) or computer-generated sounds (formant synthesis) to produce speech. In modern TTS systems, neural TTS (NTTS) or end-to-end TTS models, like those developed by Google WaveNet and Tacotron, are employed to generate high-quality, natural-sounding speech.

TTS has numerous practical applications. It is used in reading aids for the visually impaired, enabling them to access digital content easily. It also enhances user experience in customer service chatbots and virtual assistants by providing a more interactive and accessible way to deliver information. Additionally, TTS is valuable in educational tools, helping learners with reading difficulties, language learning, and providing audio versions of textbooks.

Text-To-Speech technology represents a significant advancement in making digital content more accessible and interactive, leveraging AI to bridge the gap between written and spoken language.