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Evolution from MPEG-2 AAC-LC (Low Complexity) Profile and MPEG-4 AAC-LC Object Type to HE-AAC v2 Profile. [2] High-Efficiency Advanced Audio Coding (HE-AAC) is an audio coding format for lossy data compression of digital audio defined as an MPEG-4 Audio profile in ISO/IEC 14496–3.
Version 2 of the library, introduced with Android P, also includes support for xHE-AAC [10] and AAC-ELD v2. [11] [12] xHE-AAC extends the operating range of the codec from 12 to 300 kb/s for stereo signals and allows seamless switching between bitrates over this range for adaptive bitrate delivery (using standards such as MPEG-DASH or HLS for ...
Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression.It was designed to be the successor of the MP3 format and generally achieves higher sound quality than MP3 at the same bit rate.
RMVB only supports AC-3, ATRAC3, G.728, AAC-LC, HE-AAC v1, IS-54, Cook Codec, Sipro Lab, ACELP-NET and RealAudio Lossless. VOB only supports MP2 directly. It also supports AC-3, DTS, MLP and LPCM as private streams. [103] WebM only supports Opus and Vorbis. [39]
In January 2021, Fraunhofer announced a test service and trademark program for xHE-AAC and announced that the codec is being used by Netflix. [14] [15] Netflix reported that users switched from speakers to headphones 16% less often (due to poor sound quality or inadequate volume) on high dynamic range content when using xHE-AAC instead of HE-AAC.
Nero HE-AAC May 26, 2006-q 0.2; WMA Standard 9.2 Quality-Based VBR, Q10; iTunes AAC 7.0.2.16 48 kbit/s, CBR; Various 20 22-34 Nero HE-AAC: WMA Professional and aoTuV tied for second Sebastian Mares: 2007 July multiple ~64 Ogg Vorbis AoTuV 5 Beta-q 0; WMA Professional 10 1-pass CBR, 64 kbit/s; Nero HE-AAC Jul 20 2007-q 0.24; Various 18 21-33
The encoder and decoder support MPEG-4 AAC LC, HE-AAC (AAC LC + SBR), and HE-AACv2 (LC + SBR + PS) Audio Object Types. Sample rates up to 96 kHz, and multichannel audio up to six channels (5.1 surround) are supported. The metadata utility can read and write Nero Digital, iTunes, and Memory Stick format tags to MPEG-4 containers. [3]
Linear pulse-code modulation (LPCM, generally only described as PCM) is the format for uncompressed audio in media files and it is also the standard for CD-DA; note that in computers, LPCM is usually stored in container formats such as WAV, AIFF, or AU, or as raw audio format, although not technically necessary.