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The Microsoft Media Foundation AAC encoder is a that encodes Advanced Audio Coding (AAC) Low Complexity (LC) profile, as defined by ISO/IEC 13818-7 (MPEG-2 Audio Part 7). The AAC encoder does not support encoding to any other AAC profiles, such as Main, SSR, or LTP. It does not support encoding to the MPEG-4 extensions HE-AAC v1/v2. Class Identifier The class identifier (CLSID) of the AAC encoder is CLSIDAACMFTEncoder, defined in the header file wmcodecdsp.h. Media Types The AAC encoder supports the following media types.

The HE-AAC format (High Efficiency. This side information can then be used to describe the spacial arrangement of the stereo image in the HE-AAC V2 based audio file.

1. The MPEG-4 HE-AAC v2 decoder is the combination of Advanced Audio Coding. Sample rate, number of output. MPEG-4 HE-AAC v2 Decoder for SHARC - Download.
2. HE-AAC v2 SBR Check and Channel ID. This tests for proper reproduction of the SBR portion of the HE-AAC bitstream and proper channel. Download File.

You can set the types in either order—input type first, or output type first. Input Types Set the following attributes on the input media type. Attribute Description Remarks Major type. Must be MFMediaTypeAudio. Must be MFAudioFormatPCM.

Bits per sample. Samples per second. The following values are supported:. 44100 (44.1 KHz). 48000 (48 KHz) Number of channels.

Must be 1 (mono) or 2 (stereo), or 6 (5.1).

Evolution from MPEG-2 AAC LC (Low Complexity) Profile and MPEG-4 AAC LC to HE-AACv2 Profile. High-Efficiency Advanced Audio Coding ( HE-AAC) is an for of defined as an profile in / 14496-3. It is an extension of Low Complexity (AAC LC) optimized for low- applications such as.

HE-AAC version 1 profile (HE-AAC v1) uses (SBR) to enhance the compression efficiency in the. HE-AAC version 2 profile (HE-AAC v2) couples SBR with (PS) to enhance the compression efficiency of stereo signals.

It is a standardized and improved version of the AACplus. HE-AAC is used in standards like and. Contents. History The progenitor of HE-AAC was developed by under the trade name CT-aacPlus. CT-aacPlus combined MPEG-2 AAC LC with the Coding Technologies invented (SBR).

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CT-aacPlus is the codec used by for their satellite radio service. Subsequently, Coding Technologies submitted their SBR to MPEG as a basis of HE-AAC. HE-AAC version 1 was standardized as a profile of MPEG-4 Audio in 2003 by and published as part of MPEG-4 in document ISO/IEC 14496-3:2001/Amd 1:2003. The HE-AAC version 2 profile was standardized in 2006 as ISO/IEC 14496-3:2005/Amd 2:2006. A parametric stereo coding tool used in HE-AAC v2 was standardized in 2004 by MPEG and published in document ISO/IEC 14496-3:2001/Amd 2:2004.

HE-AAC version 2 was also standardized under the name Enhanced aacPlus by for multimedia services in September 2004 (3GPP TS 26.401). It is based on the AAC LC, SBR and Parametric Stereo coding tools defined in the MPEG-4 Audio standard (and it refers to ISO/IEC 14496-3:2001/Amd.1:2003 - Bandwidth Extension, ISO/IEC 14496-3:2001/Amd.2:2004 - Parametric Coding for High Quality Audio, ISO/IEC 14496-3:2001 and ISO/IEC 14496-3:2001/Amd.1:2003/DCOR1). In addition it includes further tools such as error concealment, spline resampler, and stereo-to-mono downmix.

It was also published by as TS 126 401 V6.1.0 in December 2004. Prior to the standardization of HE AAC v2 by MPEG, Coding Technologies submitted the combination of HE-AAC v1 coupled with under the name Enhanced AAC+. As a result, aacPlus v2 and eAAC+ are now common trade names that refer to HE-AAC v2.

AAC+ and aacPlus are common trade names that refer to HE-AAC v1. Perceived quality Testing indicates that material decoded from 64 kbit/s HE-AAC does not yet have similar audio quality to material decoded from MP3 at 128 kbit/s using high quality encoders. The test, taking bitrate distribution and into account, is a tie between, HE AAC and.

Further controlled testing by during their revision 6 specification process indicates that HE-AAC and its derivative HE-AAC v2 provide 'Good' audio quality for music at low bit rates (e.g., 24 kbit/s). A 2011 Public Listening Test compared the two best-rated HE AAC encoders at that time to and Ogg Vorbis, indicated statistically significant superiority at 64 kbit/s for Opus over all other contenders, and second ranked Apple HE AAC statistically superior to both Ogg Vorbis and Nero HE AAC which were tied for third place. And MPEG-4 AAC LC decoders without SBR support will decode the AAC LC part of the audio, resulting in audio output with only half the sampling frequency, thereby reducing the audio bandwidth.

This usually results in the high-end, or, portion of the audio signal missing from the audio product. Support Encoding Orban Opticodec-PC Streaming and File Encoders were the first commercially available encoders supporting /HE-AAC back in 2003.

They are now deprecated and replaced with StreamS Encoders from StreamS/Modulation Index with many more features, including support /. They are now in use at some of the largest content providers, and are considered to be the standard of the industry for live encoding.

Sony supports HE-AAC encoding since SonicStage version 4. ITunes 9 supports HE-AAC encoding and playback. Has released a free-of-charge command line HE-AAC encoder, and also supports HE-AAC inside the Nero software suite. Sorenson Media’s Squeeze Compression Suite includes an HE-AACv1 encoder and is available for as well as.

The consortium released source code of a reference HE-AACv2 encoder that appears to offer competitive quality. And Pro also supports ripping music to HE-AAC. Using a transcoding plugin for Winamp's media library, any file can be transcoded to HE-AAC., an OS X audio encoding program, offers encoding from any of its supported formats to HE-AAC. May encode audiofiles to eAAC+ format before transmitting them to mobile phone. HE-AAC v1 and v2 encoders are provided by the library in 4.1 and later versions. Decoding HE-AAC is supported in the FAAD/ decoding library and all players incorporating it, such as, and.

The supports decoding HE and HEv2 AAC. HE-AAC is also used by and clients to deliver high-fidelity music at low bitrates.

ITunes 9.2 and iOS 4 include full decoding of HE-AAC v2 parametric stereo streams. iTunes 9 thru 9.1, iPhone OS 3.1 and Fall 2009 iPods have support for HE-AAC playback for version 1 with no parametric stereo.

Older versions of Apple, and will play HE-AAC files at reduced fidelity because they ignore the spectral-band replication and parametric stereo information, instead playing them as though they were standard AAC-LC files without the high-frequency, or 'treble,' information that is only present in the SBR part of the signal. These will report the track length as twice its actual length.

Dolby released Dolby Pulse decoders and encoders in September 2008. HE-AAC v2 is the core of Dolby Pulse so files and streams encoded in Dolby Pulse will playback on AAC, HE-AAC v1 and v2 decoders. Conversely files and streams encoded in AAC, HE-AAC v1 or v2 will playback on Dolby Pulse decoders. Dolby Pulse provides the following additional capabilities beyond HE-AAC v2:.

Ability to intelligently generate and insert reversible loudness normalization and dynamic range metadata into the encoded file/stream; this metadata can then be used to optimize the playback experience based on application and/or device. Ability to insert custom metadata into the encoded file, and extract this metadata on playback Dolby has additionally released a PC decoder as an SDK suitable for integration into PC applications requiring Dolby Pulse, HE-AAC or AAC playback capabilities. HE-AAC v2 decoders are provided in all versions of Android. Decoding is handled by since Android version 4.1. This list is; you can help.

Application Platform Description Windows A Winamp-like alternative music player. Windows, OS X, Chrome OS, Linux Browser plug-in. Supports AAC+ from any source. Live streams wrapped in an ADTS container are not natively supported and have to be re-wrapped. KH can serve streams in a container, which is compatible with Flash.) Windows, Linux Open-source music player. Windows, Linux Open-source music player.

Linux, Android Open-source music player. Windows Freeware internet radio application (in German). Windows Freeware music player. OS X, iOS Internet radio application. IOS Internet radio application. Android Internet radio player. IOS Internet radio application.

Windows, OS X Freeware music player. Pre-installed on Mac computers. Windows, Android Shareware media player. Windows, OS X Freeware audio converter. (Supports conversion of MP3, AAC, AIFF, WAV etc.) Windows, OS X and Linux Open-source media player. Windows, OS X and Linux Open-source media player.

OS X Media player pre-installed on OS X Snow Leopard or later. Windows, OS X, Linux, Android Freemium media player. (HE-AAC v2 will only play in mono) Linux Open-source music player. OS X Shareware internet radio application. Windows Freeware internet radio application.

IOS Paidware internet radio player. IOS, Android, Windows Phone, Blackberry Internet radio player.

Windows, OS X, Linux, iOS, Android Open-source media player. Windows, OS X, Android Freemium media player. Android, iOS Internet radio player. Windows, Linux, OS X, Android Opensource media player. Windows Opensource media player Promotion aspects Commercial trademarks and labeling HE-AAC is marketed under the trademark aacPlus by and under the trademark Nero Digital by Nero AG.

Sony Ericsson, Nokia and Samsung use AAC+ to label support for HE AAC v1 and eAAC+ to label support for HE-AAC v2 on their phones. Motorola uses AAC+ to indicate HE AAC v1 and 'AAC+ Enhanced' to indicate HE AAC v2.

Licensing and patents Companies holding patents for HE AAC have formed a administered by Via Licensing Corporation to provide a single point of license for product makers. Patent licenses are required for end-product companies that make hardware or software products that include HE AAC encoders and/or decoders. Unlike the MP3 format, content owners are not required to pay license fees to distribute content in HE AAC.

Standards HE-AAC profile was first standardized in ISO/IEC 14496-3:2001/Amd 1:2003. HE-AAC v2 profile (HE-AAC with Parametric Stereo) was first specified in ISO/IEC 14496-3:2005/Amd 2:2006. The Parametric Stereo coding tool used by HE-AAC v2 was standardized in 2004 and published as ISO/IEC 14496-3:2001/Amd 2:2004. The current version of the MPEG-4 Audio (including HE-AAC standards) is published in ISO/IEC 14496-3:2009.

Enhanced aacPlus is required audio compression format in technical specifications for multimedia services and should be supported in (IMS), (MMS), (MBMS) and Transparent end-to-end Packet-switched Streaming Service (PSS). HE-AAC version 2 was standardized under the name Enhanced aacPlus by for 3G UMTS multimedia services in September 2004 (3GPP TS 26.401). HE-AAC and HE-AAC v2 audio coding for applications is standardized by TS 101 154. AacPlus v2 by Coding Technologies is also standardized by the as TS 102 005 for Satellite services to Handheld devices (DVB-SH) below 3 GHz. In December 2007, Brazil started broadcasting terrestrial DTV standard called International that implements video coding H.264 with audio AAC LC on main program (single or multi) and video H.264 with audio HE-AACv2 in the 1Seg mobile sub-program.

Versions The following is the summary of the different versions of HE-AAC: Version Common trade names Codec feature Standards HE-AAC v1 aacPlus v1, eAAC, AAC+, CT-aacPlus AAC LC + SBR ISO/IEC 14496-3:2001/Amd 1:2003 HE-AAC v2 aacPlus v2, eAAC+, AAC, Enhanced AAC+ AAC LC + SBR + PS ISO/IEC 14496-3:2005/Amd 2:2006 aacPlus v2, eAAC+, AAC, Enhanced AAC+ AAC LC + SBR + PS + ISO/IEC 23003-3:2012/Amd 2:2012 See also. Notes. ^ ISO/IEC JTC1/SC29/WG11/N7016 (2005-01-11), archived from (DOC) on 2014-05-12, retrieved 2009-10-09.

Fraunhofer IIS, (PDF), retrieved 2009-10-15. ^ ISO (2003). Retrieved 2009-10-13. ^ ISO (2006). Retrieved 2009-10-13.

^ ISO (2004). Retrieved 2009-10-13. ^ 3GPP (2004-09-30). Retrieved 2009-10-13.

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3GPP (2005-01-04). Retrieved 2009-10-13. Archived from on 2011-03-29.

Retrieved 2011-03-29. Retrieved 2009-11-23. Bouvigne, Gabriel (2006-03-20).

Retrieved 2008-09-05. Retrieved 2013-10-10.

Archived from on 2015-03-18. Retrieved 2014-10-19. Via Licensing. Retrieved 2017-05-11.

Via Licensing. Retrieved 2017-05-11.

Archived from on 2017-01-17. Mihir Mody (2005-06-06). Retrieved 2009-10-13. ETSI (2009-04) Page 58. Retrieved on 2009-06-02. ETSI (2009-01) Page 11.

Retrieved on 2009-06-02. ETSI (2009-01) Page 10. Retrieved on 2009-06-02.

Retrieved 2009-10-13. 3GPP (2004). Retrieved 2009-10-13. ETSI TS 101 154 v1.5.1: Specification for the use of Video and Audio Coding in Broadcasting Applications based on the.

ETSI (2009-03-31). Retrieved 2009-10-13. Archived from (PDF) on 2006-10-26. Retrieved 2007-01-29. External links. Radio Streaming Provider that provides every stream in HE-AACv2., article in the technical review (01/2006) giving explanations on HE-AAC. list of Internet radio stations using aacPlus.

UK terrestrial radio stations streaming online in aacPlus format. FAAC (encoder) and FAAD2 (decoder). aacplusenc (Windows binary aacplusenc.exe only goes to 51 kbit/s.).

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for Nero Encoder e.g. Aac-lc, aac-he, aac-hev2 e.g.(Van Halen's Panama HE-AAC maxed at 205 kbit/s). the Nero Encoder back-end for the SNG 1.3 front-end. Audio player/ripper that allows you to rip CDs into HE-AAC and convert other audio files into HE-AAC (with a free add-on).

CD Ripper, Audio Converter, and CD Burner that allows you to rip to AAC LC and HE AAC, convert to AAC LC and HE AAC and burn AAC LC and HE AAC to an Audio CD. Albumplayer, Ripper, Converter, and CD Burner that allows you to rip to AAC and aacPlus, convert to AAC and aacPlus and burn AAC and aacPlus to gapless Audio-CD.

includes graphs comparing high-frequency performance for MP3pro (similar to HE-AAC+). HE AAC Patent Pool. The Codecs Parameter for 'Bucket' Media Types.