aacPlus

(redirected from AacPlus v2)

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.
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It supports the most popular streaming formats, including aacPlus v2, WMA and MP3.
aacPlus v2 adds Parametric Stereo (PS), which significantly increases the codec efficiency a second time for low-bit-rate stereo signals.
AMSTERDAM, Netherlands -- Coding Technologies, the leading provider of audio compression for digital broadcasting, mobile music and the Internet, announced today that 4i2i Communications has licensed the company's MPEG-4 aacPlus v2 audio codec to be combined with 4i2i's highly optimized MPEG-4 AVC/H.
aacPlus v2 decoder: implements MPEG-4 aacPlus v2 decoding compliant with ISO/IEC 14496-3 and the 3GPP specification for Enhanced aacPlus, supporting AAC, PS (Parametric Stereo), and SBR (Spectral Band Replication) in mono, stereo and multichannel configurations.
In order to ensure maximum user experience and quality, Telefonica Moviles Espana has initiated talks with Coding Technologies, the key inventor of the 3GPP/3GPP2 standards of aacPlus v1 and aacPlus v2.
MPEG-4 aacPlus v2 decoder: implements aacPlus v2 decoding which includes support for Parametric Stereo (PS) and SBR and is compliant with the 3GPP specifications for Enhanced aacPlus.
Already standardized by MPEG, 3GPP and DVB (Digital Video Broadcasting) as the codec for high quality content delivery aacPlus v2 is AAC coupled with Coding Technologies' SBR (Spectral Band Replication) and Parametric Stereo technologies.
Cube-Tec International, well-known for its professional digital audio workstations, and Coding Technologies, the leading provider of audio compression technology for digital broadcasting, mobile music and the Internet, announced the integration of Coding Technologies' aacPlus v2 audio coding engine into Dobbin, Cube-Tec's brand new professional audio rendering solution, at the spring convention of the Audio Engineering Society (AES) in Barcelona.
Already standardized by 3GPP, DVD, DVB and MPEG, aacPlus v2 is AAC coupled with Coding Technologies' SBR (Spectral Band Replication) and Parametric Stereo technologies.
NASDAQ:IVII), a pioneer in advancing DVD and MPEG-multimedia software technologies, announced today that InterVideo has selected Coding Technologies' aacPlus v2 codec for its MPEG-4 video transceiver and editor server.
Device makers and ODMs using BSP-15 and Equator reference platforms, like the Babelfish(TM) Hardware Platform, can immediately take advantage of aacPlus v2 for digital media adaptors, set top boxes, and personal video recorders.
With the addition of Parametric Stereo, aacPlus v2 raises the bar as the state-of-the-art low bit rate open-standards audio codec.