mp3HD

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**MPEG-1 Audio Layer III HD**

Filename extension(s)	`.mp3`
Media type
Developed by	Technicolor
Initial release	2009; 15 years ago
Latest release	1.5 (February 2, 2010; 14 years ago)
Type of format	Lossless audio codec
Container for
Contained by
Extended from	MP3, MPEG-1 Audio Layer III
Extended to
Standard
Open format?
Website	http://www.all4mp3.com/

MPEG-1 Audio Layer III HD, more commonly known and advertised by its abbreviation mp3HD, is a legacy audio codec developed by Technicolor (formerly known as Thomson).^[1] It is a lossless/lossy hybrid extension of the MP3 format, containing an ordinary mp3 stream and then an ID3 block to store correction data for lossless playback in an mp3HD-aware player. ^[2]^[3]^[4]

mp3HD was offered as freeware encoder/decoder, player, Winamp plugin DirectShow filter downloadable from its website^[5], which were abandoned some time around April 2013. At the time, it supported 16-bit PCM at 44.1 kHz (CD audio) and 48 kHz.^[6]

References

↑ mp3HD: New lossless MP3 format explained
↑ FhG/Technicolor mp3HD at ReallyRareWares
↑ New lossless mp3HD format trades convenience for file size | Ars Technica
↑ mp3HD at Wikipedia
↑ All4mp3 | The tools - mp3HD tools (archived on March 22, 2013)
↑ All4mp3 | Learn - mp3HD (archived on February 16, 2013)

[1] 3HD: New lossless MP3 format explained

[2] FhG/Technicolor mp3HD at ReallyRareWares

[3] New lossless mp3HD format trades convenience for file size | Ars Technica

[4] 3HD at Wikipedia

[5] All4mp3 | The tools - mp3HD tools (archived on March 22, 2013)

[6] All4mp3 | Learn - mp3HD (archived on February 16, 2013)

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Audio codecs: type/usage	for end-users to encode	on physical media etc.	legacy formats
Lossless	(Uncompr. LPCM) • ALAC • FLAC • Monkey's Audio • MPEG-4 ALS • OptimFROG • TAK • TTA • WavPack	MLP/Dolby TrueHD	La • LPAC/LTAC • RealAudio Lossless • RK Audio • Shorten • WMA Lossless • (others)
Lossy	(ADPCM formats) • AAC • AC-3 • MP2 • MP3 • Musepack • Opus • Vorbis	AC-3 • DTS • (Bluetooth codecs)	ATRAC • QDesign • Real Audio • RK Audio (lossy modes) • Speex • VQF • WMA
Hybrid lossless&lossy	OptimFROG DualStream • WavPack	DTS-HD MA • MPEG-4 SLS	ATRAC Advanced Lossless • mp3HD