Fraunhofer IIS HE AAC, HE AAC v2: Improved quality below 64 kbit/s


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Fraunhofer IIS > Business Fields > Audio and Multimedia > HE AAC, HE AAC v2: Improved quality below 64 kbit/s

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MPEG-4 HE-AAC is the low bit-rate codec in the AAC family and integrates the functionality of the AAC-LC audio codec with Spectral Band Replication (SBR) bandwidth expansion tool. MPEG-4 HE-AAC v2 adds the Parametric Stereo (PS) feature to HE-AAC for even lower bit-rates.

Overview

Quality	good quality
Bitrate	HE-AAC: 32 to 48 kbit/s stereo HE-AAC v2: 16 to 24 kbit/s stereo for good quality audio
Sampling rates	24 to 96 kHz
Channels	mono, stereo, multi-channel (e.g. 5.1, 7.1)
Used in	DAB+, DRM+, DRM, DVB-H, DMB, MediaFLO, 3GPP, XM Radio, mobile phones

Applications

All applications that rely on very low bit-rate audio for transmission over channels with limited capacity. Examples include mobile music downloads on handheld devices and a wide range of broadcasting services.

Availability

Fraunhofer IIS is the leading independent provider of optimized HE-AAC implementations. HE-AAC Encoder and Decoder object and source code are immediately available for:

PC (Win/MacOS X/Linux)
Power PC processors
TI C64, OMAP, DaVinci
TI C67
ARM
MIPS
Freescale 563xx (through third party)
ADI Blackfin
Starcore, TI C55 and Freescale Coldfire (only source code)
Apple iPhone® SDK

For a quick overview, the pdf file below provides a summary of our product offering:

Availability chart audio and video products Fraunhofer IIS (PDF, 1 page)

Patent licensing:

A patent licensing program is administered by Via Licensing Corporation. Please visit www.vialicensing.com for more information or contact info@vialicensing.com .

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