aacPlus

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aacPlus

An enhanced AAC audio format from Dolby Laboratories that delivers near CD-quality sound in as little as 32 Kbps. aacPlus extends Low Complexity AAC (AAC LC). Also known as "High Efficiency AAC" (HE-AAC), aacPlus was originally developed by Stockholm-based Coding Technologies, which Dolby acquired in 2007. See AAC and MP3.


HE-AAC version 1 - AAC+
HE-AAC v1 (AAC+) uses Coding Technologies' Spectral Band Replication (SBR) to cut the sampling rate in half. SBR then encodes the missing high frequencies at 1.5 Kbps and stores them in the auxiliary data fields. The decoder restores the high frequencies from the SBR data. See mp3PRO.







HE-AAC version 2 - Enhanced AAC+ (eAAC+)
HE-AAC v2 (eAAC+) uses Parametric Stereo (PS), which combines the left and right channels into a monaural signal. PS encodes the differences between channels as parametric data at 3 Kbps, which is used to decode the monaural stream back into stereo.
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References in periodicals archive ?
Audio formats: DRM-free MP3, AAC, AAC+, eAAC+, AMR, QCELP, WAV
* Capacity based on using optional 2Gb microSD card, 3:45 per song and 48kbps eAAC+ (M4A) encoding on the Nokia Music Manager.
The Nokia 3250 music phone is based on S60 3rd Edition software and Symbian OS - which can turn a smartphone into a portable music player capable of playing a wide range of digital music formats such as MP3, WMA, M4A, AAC and eAAC+, Nokia said.
The Nokia 6126 phone includes a digital music player that supports a variety of formats including MP3, AAC, AAC+ and eAAC+, as well as an integrated 1.3 megapixel camera.
The U120 features a 1.3 megapixel CMOS camera, plays MP3, AAC, AAC+ and eAAC+ audio formats, streams video, features a MicroSD card slot for expandable memory and offers Bluetooth capabilities.
It has an in-built Music player with MP3, EAAC+, e AAC, AAC and FM radio with RDS technology that allows user to enjoy a complete mobile radio experience with on screen music information and stay charmed all the time with their favorite radio stations.