Systems that display textual representations of audio content, synchronized with the video playback, allow viewers to perceive dialogue and other significant sounds visually. These systems commonly involve a decoder within the viewing device, or an external accessory, to interpret and present the text on the screen. The primary function is to render captions visible and legible during video consumption.
The availability of visual aids significantly expands media accessibility, particularly for individuals with hearing impairments, non-native speakers, and those in noisy environments. Historically, these systems have evolved from simple on-screen text to sophisticated solutions that offer customizable fonts, sizes, colors, and positioning, enhancing the viewing experience and facilitating comprehension.
