G.168 Plus Packet, World
Class Echo CancellerAVAILIBILITY
ADT G.168 is available on the TMS320™ DSP Family, C5000™ and C6000™ DSP Platforms
C55x™DSP, C64x, & C64x+™DSP generations
Linux/x86
Adaptive Digital's echo canceller G.168 Plus Packet EC (PEC) is able to handle round-trip delays of 512 milliseconds. Furthermore, our echo canceller is packet-loss aware and is able to mitigate the specific effects that packet loss has on echo cancellation in the VoIP network.
Packet Loss: If an echo canceller is placed on the opposite side of a packet network with respect to the hybrid, a lost packet causes an interruption in the echo path. This can cause an echo canceller to diverge.
Adaptive Digital’s echo canceller is offered in three variants, which are compared by feature set in the following table. Adaptive Digital's Packet EC includes the complete feature set.
| Feature | G.168 LEC | G.168 NEC | PEC (G.168+ Packet EC ) |
| Maximum Tail Length | 16 msec | 128 msec | 512 msec |
| Tandem Free Operation | -- | X | X |
| High Efficiecty Tandem Free Operation | -- | -- | X |
| Packet Loss Concealment | -- | -- | X |
| PCM Slip Correction | -- | X | X |
| Dynamic NLP | X | X | X |
| Comfort Noise Generator | X | X | X |
| Rapid Convergence | X | X | X |
| Automatic Tail Search | -- | X | X |
| Cancels multiple reflectors | X | X | X |
| Convergence Monitor | X | X | X |
| Tone Disabler | X | X | X |
| SS7 Tone Detection | -- | X | X |
| Double-talk Detection | X | X | X |
| Stationary Signal Detector | X | X | X |
| Pre-NLP Signal Available | X | X | X |
| Split Pre- and Post- Processing | X | X | X |
| Handles Residual Acoustic Echo | X | X | X |
| eXpress DSP™ compliant | X | X | X |
| Functions are “C” callable | X | X | X |
| User Configurable Parameters | X | X | X |
C55x
All Memory usage is given in units of byte.
| Tail Length | MIPs (Peak) | Program Memory | Data Memory | Per-Channel Data Memory |
| 256 msec | 8.2 | 13686 | 9738 | 8834 |
| 384 msec | 10.4 | 13686 | 13834 | 12546 |
| 512 msec | 12.4 | 13686 | 17930 | 16258 |
C64x
All Memory usage is given in units of byte.
| Tail Length | MIPs (Peak) | Program Memory | Data Memory | Scratch | Per-Channel Data Memory |
| 256 msec tail | 5.2 | 31264 | 6502 | -- | 8804 |
| 384 msec tail | 5.8 | 31264 | 8934 | -- | 12260 |
| 512 msec tail | 6.2 | 31264 | 11366 | -- | 15716 |
NOTE: Worst case, consult User’s Guide for reduced complexity specs.
C64x+
| Tail Length | MIPs (Peak) | Program Memory | Data Memory | Scratch | Per-Channel Data Memory |
| 256 msec | 5.1 | 29280 | 6502 | -- | 8804 |
| 384 msec | 5.7 | 29280 | 8934 | -- | 12260 |
| *512 msec | 6.1 | 29280 | 11366 | -- | 15716 |
NOTE: Worst case, consult User’s Guide for reduced complexity specs.
CPU Utilization
| Variant | Platform | Average MIPS* | Peak MIPS |
| PEC | 32 bit | 19 | 148 |
| PEC | 64 bit | 8 | 60 |
* PEC average MIPS characterized with smart packet optimization set to maximum on echo-free circuit
With G.168+/Packet EC, Adaptive Digital strives to meet the current and future requirements of service providers, system developers, and end-equipment manufacturers bringing superior voice quality to speech-based applications. By continually evolving their echo cancellation algorithm, Adaptive Digital strives to increase the differentiation between their world class EC and those of their competitors.
For more information on our echo canceller algorithms and solutions,
please contact us at 610-825-0182
SITE LINKS
HOMEECHO CANCELLER
G.168 v10 NEC & LEC G.168 Plus™ Packet G.168 Testing Service G.168 Lite G.168 EC CHIP 'C6424 G.168 SUB. TEST DEMO ECHO EXPLAINED AT&T QUALIFICATION ACOUSTIC EC ACOUSTIC EC G4 EC INDEXVOICE QUALITY
VQE SUITE Noise Reduction Noise Reduction Gen2 Noise SuppressionRELATED LINKS
PRODUCT INDEX .pdf INDEX WHITE PAPERS VOIP PHONE REFERENCE KIT G.PAK FRAMEWORK OPEN G.PAK SOLUTION DSP RESOURCE WIZARDAdaptive Digital's echo canceller is a robust, carrier class, flexible software solution that is available across a wide variety of DSP platforms.
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