MPEG-FAQ 4.1: FHG Layer 3
FHG Layer 3
ISO-MPEG Audio Layer 3 software only Encoder and Decoder for Unix
copyright Fraunhofer - IIS 1994, 1995
- evaluate highest quality perceptual audio compression technique
- software only encoder and decoder implementations
- implements ISO/MPEG Audio standard ISO/IEC IS 11172-3, Layer 3
- wide range of compression ratios including
6:1 fully transparent quality
11:1 64 kbps per channel, very high quality
16:1 still better than your average 16 bit 44.1 kHz sound card
- music data is input in raw format (16 bit signed integer), in
RIFF/WAVE format as used by Microsoft Windows .WAV files, in
AIFF/AIFC format as used by SGI and Mac or in .snd/.au format used
by NeXT and Sun.
- 44.1kHz sampling frequency (32 kHz and 48 kHz also for registered users)
- packed bit stream conforming to ISO/MPEG Layer III
- output of decoder is in raw format (16 bit signed integer),
in .snd/.au format, in AIFF/AIFC format or in RIFF/WAVE format
- .WAV music files can be played with Windows Media Player
- Under rare circumstances the .WAV output is broken. Please use raw format
in that cases.
- optional decoder output as 24 bit hex ascii data
- written by the very same people at Fraunhofer-IIS who did the
Layer III codecs for the ISO and ITU-R (former CCIR) tests
(best sound quality at low bit rates at all listening tests)
- commercial real time products for encoding and/or decoding of
Layer III are available. Contact one of the companies listed
in the file info.txt
The package consists of the following files
l3enc encoder program V2.00
l3dec decoder program V2.10
manual.txt instructions for encoder and decoder programs
register.txt information on registration. PLEASE READ THIS!
info.txt infos on ISO MPEG Layer III and Layer III products
readme.txt this file
history.txt infos on the history of this shareware product
go32.exe DOS extender
winplay3/ in this directory is a demo version of the realtime
Windows player WinPlay3
contents.txt short discription of the following Layer 3 bitstreams
contents short discription of the following Layer 3 bitstreams
funky.mp3 demo layer 3 bitstream (96 kbit/s, stereo, 44.1 kHz)
spot1.mp3 demo layer 3 bitstream (96 kbit/s, stereo, 44.1 kHz)
spot2.mp3 demo layer 3 bitstream (96 kbit/s, stereo, 44.1 kHz)
spot3.mp3 demo layer 3 bitstream (96 kbit/s, stereo, 44.1 kHz)
classic1.mp3 demo layer 3 bitstream (56 kbit/s, stereo, 22.05 kHz)
classic2.mp3 demo layer 3 bitstream (48 kbit/s, stereo, 22.05 kHz)
The song used for funky.mp3 is named "Funky" and was composed and
arranged by Juergen Herre. "Funky" is copyright Juergen Herre 1994.
You may use "Funky" for all evaluation purposes of this shareware product.
You may not use "Funky" for commercial purposes (e.g. radio broadcasting).
The other bitstreams were provided by OMNI-Mediasound.
This package is distributed as shareware. You may work with the package for
30 days for evaluation purposes. If you want to use this package after the
evaluation period, you are required to register the package (see information
in the file register.txt). You may give copies of this package to other
people as long as no file is changed and no file is omitted.
If you need further information on Layer 3 products or if you have
any questions concerning this shareware product, please send email to
email@example.com or try http://www.iis.fhg.de/. ]
You can also fax or mail your questions to
Layer 3 support
Fraunhofer - IIS
Am Weichselgarten 3
Fax: + 49 9131 / 776 399
Don't forget that there are no warranties associated with this software.
While we believe that our software is reasonably bug free and well behaved,
we are in no way responsible if our software does not work the way you
would expect it to work. No matter if it locks up your computer, garbles
your floppy disks or does any other harmful things to your computer - it
is entirely your problem.
Fraunhofer - IIS is not liable for any infringments or damages of
third parties' rights in consequencs of your use of this shareware
product. Fraunhofer - IIS is in no event liable for, respectively does
not warrant the trustworthiness, quality, industrial exploitability,
serviceability of this shareware product for the supposed purpose
or any other purposes.
All brand names are registered trade marks of their respective owners.