Codecs

 🔴This type of encoding is used to reduce the size of audio and video files
🔵Encoded media file is sometimes similar in quality to the original but has much smaller file size «
🔴« however, video compression can be lossy «
🔴the compressed video lacks some information present in the original
video 
🔴decompressed video has lower quality than the original as there is
insufficient information to accurately reconstruct the original video
🔴Each audio and video file format has a corresponding coder-decoder / codec program
🔴The codec is used to code it into the appropriate format and then decodes for playback
🔴Encoding involves the use of a code to change original data into a form that can be used by an external process
🔴Encoding / decoding often refers to the process of analogue-to-digital / digital to-analogue conversion
🔴Can apply to images, audio, video, signals from sensors / control systems.