Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.
Related to codec: Video codec


A device that converts analog signals to digital form for transmission and converts signals traveling in the opposite direction from digital to analog form. Derived from coder-decoder.



(1) (COder/DECoder) A hardware circuit that performs analog-to-digital conversion (ADC) and/or digital-to-analog (DAC) conversion. When a digital device receives analog signals from a microphone, VHS tape or other analog source, the ADC converts them to digital audio samples and video frames. Generally, the results are further compressed to save bandwidth (see definition #2).

(2) (COmpressor/DECompressor) Software and/or hardware that compresses digital audio and video data in order to reduce file size. Compressed files can be transmitted faster and stored in less space. For example, a song on a CD can be reduced to 10% of its original file size using MP3 compression (see MP3). The size of a movie/video file is dramatically reduced using various compression techniques (see video format).

Video formats generally use one codec, which may comprise several quality levels. "Container formats," such as Apple's QuickTime and Microsoft's AVI, support a variety of codecs (see container).

The goal of codec designers is to maintain audio and video quality while compressing the binary data further. Lossy methods are widely used, which actually discard bits that most people cannot hear or see. See lossy compression, codec examples, companding and codec switching.

(3) (COmpressor-DECompressor) A general data compression algorithm; for example, a "Zip codec." The term may also be applied to the built-in algorithms used to create and render images such as GIFs and JPEGs. See data compression.
References in periodicals archive ?
The adaptive audio signal of G.722 audio codec is then fed to AAC audio codec which consists of encoder and decoder.
"APAC is the fastest-growing region for the audio codec market during the forecast period"
TechNavio's report, the Global Smartphone Audio Codecs Market 2014-2018, has been prepared based on an in-depth market analysis with inputs from industry experts.
Google is pushing with VP9 codec for 4K YouTube videos that can compress the video files to half the size than the current H.264 format.
a list of 19 hardware partners that have pledged support for the new codec.
Codec SDK 9 demonstrates Rovi's breadth of entertainment offerings, which include upstream production technology used to create and distribute entertainment.
RipCode's V6 transcoding appliance is equipped with industry-leading transcoding flexibility (file-to-file, file-to-stream, stream-to-stream, stream-to-file and RipCode's On-Demand Transcoding), codec and container flexibility, concurrency, video processing functions and resolutions ranging from QVGA to 1080i/p.
Broadcom Corporation (NASDAQ:BRCM), Irvine, Calif., a global leader in semiconductors for wired and wireless communications, is offering its BroadVoice family of voice codecs royalty-free and without any licensing fees.
The TANDBERG Profile Series portfolio includes:* The new Profile 65" Dual is powered by the most advanced 1080p codec on the market - the award-winning TANDBERG Codec C90.
Blanket statements about which player technology is best for submission to YouTube become moot when considering all the other factors, especially the codec involved.
The upcoming real era of H.264 would require downsizing and cost-saving of H.264 CODEC equipment and efficient methods to realize highly-realistic video image on a large screen exceeding HDTV which will, for example, be used for live broadcasting of sport and music events.
Through using OpenMAX IL, different codecs may be easily inserted into the pipeline, or the configuration of the processing pipeline can be easily changed with full media component and codec interoperability.