With burst loss, replaying the last packet several times would produce a stuttering or "rrrrrr" effect, or continuous insertion of comfort noise
would produce extended silence, or frames of reference would be lost for interpolation.
Echo cancellation combined with voice activity detection and comfort noise
generation supports guaranteed delivery of toll-quality voice to subscribers.
168-2002 echo cancellation (up to 128 msec), comfort noise
generation (CNG) with level control, wireless codecs with Voice Quality Enhancements (VQE), voice data compression, PCM support, carrier-class diagnostics, fax relay and low system latency.
168-2000 Line Echo Canceller, Voice Activity Detection (VAD), Comfort Noise
Generation (CNG), Jitter Buffer, Packet Loss Concealment (PLC), DTMF Tone Detection and Generation, Call Progressive Tone (CPT), SIP/RTP/RTCP Call Signaling and Control, and multi-channel system-level framework.
The card will transport channel associated signaling (CAS) over ATM and DSL, using silence suppression, comfort noise
injection and echo cancellation technology features.
GIPS AEC delivers the highest possible voice quality with an adaptive filter, non-linear processor (NLP), comfort noise
generator and control system.
generation with silence detection and compression allows for optimal use of channel bandwidth.
In addition to the high quality compression and echo cancellation, the Wireless Network Compression solution features silence suppression with superior Voice Activity Detection (VAD) and Comfort Noise
Generation (CNG), and intelligent packet loss concealment (PLC) with low-delay and non-blocking.
By utilizing TI's voice-optimized DSPs and Telogy Software products, Alcatel's 7300 ASAM will support a broad set of carrier class features including tone detection and generation, voice activity detection, echo cancellation up to 128 msec, comfort noise
generation and fax relay.
726 voice codecs, comfort noise
generation, tone handling, acoustic echo cancellation, playback/record capabilities and 3-way audio conferencing support.