Also found in: Dictionary, Thesaurus, Medical, Legal, 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 Nancy Codec solution easily records and stores video images, allowing them to be enjoyed anytime, anywhere.
Designers can achieve fast time-to-market with Chipidea's audio codec IP family as it is available in several foundry process technologies ranging from 0.
Our optimized cost-performance audio codecs are affordable SoC-ready IP meaning they are optimized for low area and low power while still allowing designers to select precisely the features they need.
Uses Cypress WirelessUSB LP (CYRF6936), Wireless enCoRe II (CY7C60323) flash MCU and Winbond (W681360) 3V Single-Channel CODEC.
With the addition of our IPoIP distributed image processing architecture, COE is offering extremely sophisticated and intelligent codecs with all the benefits of leading-edge video analysis capabilities minus the expense of network infrastructure and additional field hardware to its customers in key transportation markets (traffic management, transport and passenger monitoring, mass transit system and transportation infrastructure).
The new software, which utilizes the existing IDT HD Audio codecs, allows customers to easily provide simultaneous audio processing objects (APO) -- including third-party add-ons and proprietary functionality -- beyond the capabilities built into Vista itself.
MainConcept is a worldwide leader in codec technologies for personal computers, set-top boxes, DSP and embedded solutions.
With the introduction of this family of 4-channel CODECs, SigmaTel's offering now includes a broad array of HD Audio CODECs with digital microphone support that includes 2-channel, 4-channel, 8-channel, and 10-channel codec families.
Harald Popp, head of the Multimedia Realtime Systems department at Fraunhofer IIS, says: "These two MPEG-4 audio codecs are a perfect cornerstone for any professional broadcast application and we are glad to see Comrex include them in their studio and portable Access Codec System.
The MainConcept J2K Codec features the fastest possible decoder, which utilizes Dual Core technology to allow real-time playback of HD streams.
Our solution, includes: FLUTE, ESG, multimedia codecs and A/V player.