The VoiceAge research team stands among the inventors
of the majority of the international communication
low bit rate compression standards that have
been adopted in the past ten years.
Our engineers invented
the internationally recognized ACELP® technology
platform, the patented core audio codec technology
present in more than 15 telecommunication standards, notably:
GSM EFR (ETSI), PCS 1900, IS-136 (TIA, North
American TDMA), IS-95 (TIA, North American CDMA),
TETRA (ETSI), G.729 (ITU-T), G.723.1 (ITU-T),
AMR (Adaptive Multi-Rate) narrowband (ETSI and
3GPP), AMR-WB (3GPP), G.722.2 (ITU-T), MPEG-4
CELP Audio (ISO), PDC-EFR (ARIB-Japan), VMR-WB
(3GPP2) and most recently AMR-WB+ (3GPP).
Click here for a graphical view of the many international codec standards based on our ACELP® technology platform.
ACELP® technology is deployed in more than
two billion mobile handsets — 93% of digital
cellular phones worldwide. In addition, since
1994 ACELP® has become a de facto standard
for voice applications on the Internet (present
on over 500 million PCs worldwide) and has been
integrated by companies such as Microsoft, RealNetworks,
and Apple into their Windows Media Player, RealPlayer,
and QuickTime Player products, respectively.
The pages in this section introduce some of the leading-edge codecs
based on our ACELP® technology platform.
To find out more about a codec, follow the link
in the menu on the left.