A codec (short for coder-decoder) is a software or hardware algorithm used to compress large digital media files for storage or transmission and decompress them for playback. Without codecs, a single minute of raw 1080p video would require roughly 84 GB of storage, making modern internet streaming and digital communication impossible. Types of Codecs
Codecs are fundamentally categorized by how they handle the data compression process:
Lossy Codecs: These permanently eliminate redundant or less noticeable data to vastly reduce file sizes. Reconstructed files are a perceptual approximation rather than an exact copy of the original.
Lossless Codecs: These compress data without discarding any information, allowing perfect byte-for-byte reconstruction. They maintain maximum fidelity but result in massive file sizes that are inefficient for streaming. Standard Video Codecs
“Standard-based codecs” are official profiles established by standard-setting organizations like the Motion Picture Experts Group (MPEG) and the International Telecommunication Union (ITU). Standardizing formats ensures that media encoded on one device can seamlessly decode and play back on any other manufacturer’s hardware or software.
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