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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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


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(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.
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The "Smartphone Audio Codecs - Market Analysis, Trends, and Forecasts" report has been added to's offering.
SIP is a messaging protocol used for establishing connectivity over public and private IP links and establishing interoperability between codecs. SwitchBlade comes with major codecs, including 256 Kb/s stereo Opus and G.711, for high quality program distribution between studios, networks, and affiliates or newsgathering or sports venues.
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H.264 was the last codec home run and might be the last ever.
Now designers of audio systems have a fully-certified, Bluetooth 5-compliant System-on-Chip (SoC) with Sony's LDAC audio codec technology* in the IS2064GM-0L3 from Microchip Technology Inc.
GatesAir is unveiling the Intraplex IP Link 200A, the company's first AES67-compliant audio-over-IP (AoIP) codec.
The Compression Ratio obtained from the combination of two audio codecs such as G.722 and AAC is better when compared with single codec as shown in Table 7.
The Japanese multinational has contributed an advanced LDAC codec for Android O's Bluetooth support.
However, the transcoding requirements of advanced HD audio and video codecs are rapidly exceeding the media processing capabilities and scalability available on legacy equipment.
DearMob has released 5KPlayer for Windows version 3.2, the second mature upgrade to optimize the H.265/HEVC video codec playback function and present better visual enjoyment of 4K and 8K UHD videos.
This report covers the present scenario and the growth prospects of the Global Smartphone Audio Codecs market for the period 2014-2018.
Supported codecs data rates are - a-law, [micro]-law, 16-bit PCM (Intel), 16-bit PCM (Motorola), G.726 (40 Kbps, 32 Kbps, 24 Kbps, and 16 Kbps) and now G.722 (64 kbps) as well.