Speech Processing

Speech Processing is the digital signal process that enables machines to accurately convert spoken audio to text (ASR) and synthesize human-like voice from text (TTS).

This technology is a critical fusion of digital signal processing and machine learning, allowing systems to acquire, manipulate, and interpret human speech signals. Core tasks include Automatic Speech Recognition (ASR) and Text-to-Speech (TTS). ASR, powered by deep neural networks, drives high-impact applications: think virtual assistants like Siri and Alexa, or the call routing system AT&T deployed in 1992. TTS provides the natural voice output. The goal is seamless human-computer interaction, enabling hands-free dictation, which is demonstrably faster—up to 3x the speed of typing—and fundamentally reshaping customer experience and enterprise workflow.

https://en.wikipedia.org/wiki/Speech_processing