audio codec

(redirected from Audio coding)

audio codec

(1) (audio enCOder/DECoder) Software that compresses and decompresses a digital audio signal. MP3, Windows Media Audio (WMA), Dolby Digital and DTS are examples of popular codecs that compress and decompress digital audio. The audio codec may also be a hardware circuit. See codec examples, codec, Windows Media formats, QuickTime, audio compression, perceptual audio coding and G. standards.

(2) (audio enCOder/DECoder) A hardware circuit that converts sound waves into PCM digital code and vice versa. The term may refer to only the A/D and D/A conversion, or it may include the compression technique for further reducing the signal (definition #1 above). If the codec is specialized for human voice, it is known as a "speech codec," "voice codec" or "vocoder" (see speech codec). See sampling and codec.
References in periodicals archive ?
Contract notice: acquisition of ip audio coding equipment with multiple sim cards
This overlapping analysis windowing is very useful to audio coding since it helps to mitigate the blocking artifacts that deteriorate the reconstruction of transform audio coders with non-overlapped transforms.
M2 EQUITYBITES-September 3, 2012-CSR launches aptX Low Latency audio coding technology(C)2012 M2 COMMUNICATIONS http://www.
He (SRS Labs) proposes a psychoacoustic model for digital perceptual audio coding and digital audio watermarking.
CSR aptX audio coding technology delivers CD-quality stereo audio wirelessly over Bluetooth connections for a range of consumer electronics applications.
Written for audio processing and coding engineers, this comprehensive guide reviews all of the latest technologies concerning spatial audio coding, including research on psychoacoustics, manipulation of spatial audio channels and the synthesis of audio channels.
The product line-up consists of the uPD9993 chip, which offers 64 polyphonic tones and is the first LSI device to support MP3 and advanced audio coding (AAC) playback; the uPD9996 chip for low-end monaural (single-speaker) mobile phones, which is pin-compatible with the NEC Electronics uPD9990/ 1/2 series of melody solutions; and the uPD9995 chip, a smallest-in-class monaural chip first introduced in September 2003.
CSR aptX audio coding technology replaces the standard audio codec Bluetooth employs for streaming stereo audio wirelessly from audio devices to headphones and speakers, delivering improved, high-fidelity sound comparable to the CD quality consumers have come to expect from their home entertainment systems.
Contract award notice: buy audio coding software ip transmission system of rtv slovenia.
He, a highly respected research engineer who has worked for the likes of Panasonic and BrainMedia, delivers this thorough discussion of watermarking technologies and their relationship to copyright protection, digital signal processing, perceptual audio coding and compression and psychoacoustic modeling.
5 offers support for the 3GPP and 3GPP2 wireless standards including Advanced Audio Coding (AAC), Adaptive Multi-Rate (AMR) and Qualcomm Code Excited Linear Predictive (QCELP) audio codecs, MPEG-4 and H.
In addition, Apple has also added support for the Advanced Audio Coding audio format, support for the CELP speech codec, Flash 5 support, DVD Pro support, an updated user interface and skip protection enhancements.