Welcome to the ZyXEL Networking Glossary - your definitive source for descriptions of networking terms and ZyXEL's product features.
Select a letter or use the search box to look up a term.
A compression/decompression algorithm (codec) encodes/compresses data into digital data and decodes/decompresses it back again. Data passed through a codec can either be analog or digital in origin. Some codecs work better with analog data (such as an audio codec that converts a telephone conversation from an analog phone and then sends it over the Internet), while others are dedicated exclusively to digital data (such as a video codec that re-compresses existing digital film footage).