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audio codec
(redirected from Audio coding)

    Also found in: Wikipedia 0.02 sec.
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.
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00 Hardcover TK7881 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.
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Apple's iPod -- which dominated the market before the arrival of the iTunes Store -- should still do well, as should the Advanced Audio Coding format Apple uses for iTunes downloads.
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264 video capability, as well as support for MPEG-1 Audio Layer 3 (MP3), Windows Media Audio (WMA), Advanced Audio Coding (AAC), aacPlus and Enhanced aacPlus audio formats.
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