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Digital Network Echo Canceller Software (G.168 Software)
Floreat’s Digital Network Echo Canceller Software implements the ITU-T G.168 recommendation. Digital network echo canceller eliminate echo arising from network components, such as 2/4 wire conversion hybrids, as well as from signal processing and transmission delay. The Floreat G.168 software describes the characteristics of an echo canceller and tests to assess the performance of an echo canceller under network usage scenarios. The G.168 standard does not give guidelines for algorithm and hence the implementation is vendor specific.
The Floreat G.168 Digital Network Echo Canceller software is modular, re-locatable and re-entrant to support multi-channel capability and can operate within a multi-tasking environment or as a single task.
It supports user callable functions and can be integrated with Floreat’s other fax, telephony, speech compression, VoIP, FoIP, DSVD, imaging and video software for various applications. Floreat G.168 DNEC software is supported on various DSPs and processors as well as offered in ANSI C.
Features:
Conforms to ITU-T G.168 requirements
Supports tail length up to 64 ms
Supports user callable functions
Utilizes Normalized LMS (NLMS)
Fast convergence
Double talk detector avoids divergence during double talk
Tone detector and hold release logic
Non linear processor
CNG modules can be optionally added for enhanced performance
Supports multiple channels
Easily portable, re-entrant and re-locatable code
C callable APIs
Digital Network Echo Canceller Software (G.168 Software) printable pdf version 
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