Subtitles are captions but captions are not subtitles. Generally, subtitles displayed on the bottom of the television screen, film etc,. This helps us in understanding the language by transcribing and translating the dialogue or narrative of the characters that spoken. However, subtitles and closed captions goal are to provide information to the viewers. But both are designed for two different purposes. As closed captions provide both speech and non-speech sounds to the viewers. Non-speech sounds are considered essential for understanding what’s happening on the screen such as laughter, doorbell ringing, phone ringing, music playing etc. To be simple, it is provided with the assumption that the viewer/reader cannot hear the audio.