creates leading-edge innovative DSP algorithms and implementations
for your next generation telecom products, including
voice compression, multimedia, packet networks, baseband
wireless, and RF systems.
Working with our clients and partners, we develop advanced
and innovative technologies for OEM, professional, and
consumer products. Together we build effective programmable
DSP, PC based, or ASIC implementations.
MELPe / MELP Vocoder at 2400, 1200 & 600 bps
MELPe - Enhanced Mixed-Excitation Linear Predictive (MELP)
vocoder, known as military standard MIL-STD-3005 and NATO
STANAG 4591, is a triple-rate low rate coder that operates at
2400, 1200 and 600 bps. Compandent has participated in the research,
development, and implementation of the MELPe.
And now, Compandent's world-class expertise
in speech coding and savvy DSP expertise have taken the MELPe
to the next level, the Compandent
MELPesuite (a.k.a MELPe++ or MELPe-Plus-Plus). Compandent's MELPe produces better
quality than the standard reference! Compandent has also
greatly improved and optimized the code. Compandent has ported
MELPe to various DSPs by Texas Instruments such as TMS320c54xx, TMS320c55xx, TMS320c64xx, C64x+ (such as C674x C672x etc.), and OMAP (c55x based, c64x+ based (L-137, L-138) etc..), Analog Devices BlackFin ADSP-BF561, ARM,
, and GHS PowerPC. Compandent's MELPe is also "Packetized-Netweork-Ready". You may listen to its audio demo in clean, noisy, and various Frame-Erasure-Rate (FER) conditions. Compandent also created multi-channel & multi-thread POSIX compliant MELPe real-time implementation for various operating systems such as Unix, Linux, Windows PC, Apple, etc.. Download
Compandent c54xx, c55xx OMAP MELPe's Fact Sheet and c64xx Fact Sheet See also Compandent MELPe FAQ's, our Customer Reviews, and Note to Defense Contractor Management and Engineering. Compandent offers low-cost Data-Terminal Equipment (DTE) such as FLEXI-232 and FLEXI-PC104 for interfacing MELPe vocoders with external devices such as Rockwell Collins MDM-3001 and other modems.
EchoKiller: Advanced Acoustic Echo Canceler
high quality hand-free phones, and teleconferencing, Compandent
has developed proprietary algorithm for acoustic echo cancellation,
which excels in extremely fast convergence for music and speech
signal. EchoKiller is an excellent solution, and can be added
on as a library to any existing application such as VoIP PC
client software for Call Centers to provide high quality and
pleasant communication between customers and Customer Service
EchoKiller's Fact Sheet
ComPacketer: High Quality 2.8 kbps Vocoder
world-class expertise in speech coding algorithms has led
to a new generation of proprietary low rate compression algorithms,
that lead the state-of-the-art.
ErrorCombater: Patented Method For Improving Compression Quality In Packetized Networks
invented a new technique, The
ErrorCombater, for improving robustness, and hence
quality, of coded signals for degraded transmission channel,
IntellInteractor: Innovative Service/System To Save You Time When Interacting With IVR such as Directory Assistant
has developed a new method and system, The
IntellInteractor, that can reduce the time spent on,
cost involved with, distraction caused by, and need to being
put on hold, and/or the need to manually operate or respond
to the common automated voice/tone-enabled services such as
directory assistance. This novel invention is greatly beneficial
to consumers and businesses. Download
IntellInteractor's Fact Sheet
Standard Vocoders Real-Time Implementations
Compandent provides real-time implementation of speech coding standards, for DSP and PC in the form of library, DLL, etc..
Contribution and Support For Speech Coding Standards
Compandent has participated in the research, development, and implementation of the Enhanced Mixed-Excitation Linear Predictive (MELPe) vocoder, which operates at 2400, 1200 & 600 bps. Compandent provides real-time software and hardware related to the MELPe vocoder on various DSPs such as TI's TMS320c54xx, TMS320c55xx, TMS320c64xx, C64x+ (such as C674x C672x etc.), and OMAP (c55x based, c64x+ based etc..). Compandent's MELPe suite produces better quality than the standard reference!