Part 3/13:
Transitioning into the technical domain, the speaker emphasizes the intricacies of speech as a modality. Unlike text, which can be tokenized and compressed efficiently, speech involves biological and physical processes. They describe the architecture of speech systems: encoding, synthesis, and vocoding, all working together to convert text into natural-sounding audio.
A highlight is the explanation of how audio signals are processed using Fourier Transforms, converting time-domain signals into frequency domain representations like Mel spectrograms. These spectrograms serve as the backbone for modern text-to-speech (TTS) systems, which have evolved from robotic-sounding outputs to highly realistic human voices.