The
delivery of video services is far more complex than
that of pure voice or data. Dilithium engineers and
technical experts have been involved in broad range
of standard and technology development in the
audio/video compression and multimedia communication
areas since the early 1990s. Today’s Dilithium
products and solutions are underpinned by many of
these technologies, either in a unique offering or
as part of the standards.
Different telecommunication networks today utilize
different audio/voice codecs. The variation is due
to the different conditions (bit-rates, delays,
error recovery/concealments, etc…) that govern a
particular network. Within an industry (e.g.
mobile/cellular) different codecs may also be
dominant or mandated, as is the case in GSM/WCDMA
and CDMA/CDMA-2000 networks. Another example of
variation is between broadband VoIP codecs (e.g. the
ITU-T G.72X series) and the mobile-oriented voice
codecs.
The variations of audio/voice codecs used across
networks necessitate transcoding because of
bit-rates restrictions and the complexity involved
in terminals supporting codecs of other networks.
For example WCMDA handsets do not/cannot support
G.72X series of codecs.
Voice Unicoding
Dilithium is the leading vendor of advanced voice
transcoding solutions. The Dilithium patented "Unicoding"
technology represents a breakthrough in signal
processing at the algorithmic level and enables
efficient and on-the-fly transcoding from one CELP
(code excited linear prediction) codec to another.
Most mobile and narrow band voice codecs used in
mobile and VoIP networks are based on CELP.
Dilithium Voice Unicoding offers several significant
benefits compared to the brute force and far less
efficient tandem decoding-recoding methods used in
competing solutions. The Dilithium Voice Unicoding
offers equal or better quality than tandem voice
transcoding, while improving the customer experience
by minimizing to zero the algorithmic delays
yielding an optimal lip-sync. The Dilithium Voice
Unicoding utilizes significantly less resources than
the brute force methods, allowing the Dilithium
solutions to utilize freed resources in enhancing
the customer experience. The Dilithium Voice
Unicoding technology also features built-in
capability for voice transrating as well as for DTMF
detection. |
