aacPlus

(redirected from eAAC+)

aacPlus

An enhanced AAC format from Coding Technologies (www.codingtechnologies.com) that extends Low Complexity AAC (AAC LC) to deliver near CD-quality sound in as little as 32 Kbps. Also known as "High Efficiency AAC" (HE-AAC).

Version 1 - AAC+ (HE-AAC v1)
Using Spectral Band Replication (SBR), AAC+ is a proprietary technique that halves the sampling rate but encodes the missing higher frequencies at a rate of 1.5 Kbps and stores them in the auxiliary data fields of the MPEG format. SBR is also used in the mp3PRO format (see mp3PRO).

Version 2 - eAAC+ (HE-AAC v2)
Used for stereo signals, eAAC+ supports Parametric Stereo (PS), which works similar to SBR. PS encodes the differences between left and right channels as a 3 Kbps data stream that it sends along with the monaural representation of the channels. See AAC and MP3.


Spectral Band Replication (SBR)
SBR encodes the high frequencies and stores them in the auxiliary data fields. The decoder restores the high frequencies from the SBR data.







Parametric Stereo (PS)
Parametric Stereo combines the left and right channels into a monaural signal and encodes the differences between channels as parametric data at a bit rate up to 3Kbps. The decoder turns the monaural stream back into stereo from the parametric data.
Mentioned in ?
References in periodicals archive ?
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.
The phone's built-in RealPlayer player supports MP3, AAC, eAAC+, AAC+, WMA, WAV and other audio formats, as well as WMV9, MPEG4, CIF, and 3GP video formats.
Con 8GB de memoria interna y teclas exclusivas para musica y juegos, el aparato reproduce musica en Los formatos MP3, AAC, eAAC+, AAC+, WMA/M4A y WAV.
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.
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 webcam for live video calling Back camera: Video recording, HD (720p) up to 30 frames per second with audio; still camera with 5x digital zoomFront camera: Video recording, VGA up to 30 frames per second with audio; VGA-quality still camera Sensors Light sensor, accelerometer, compass (magnetometer), and gyroscope Three-axis gyroAccelerometerAmbient light sensor Media Formats Supported Audio formats: DRM-free MP3, AAC, AAC+, eAAC+, AMR, QCELP, WAVVideo formats: MPEG-4, H.
Digital music player (supports AAC, eAAC+, MP3 and Windows Media Audio formats)
1) Assumes eAAC+ encoded files Facts and features may vary depending on local variant.