Ok Ken,
what does this mean?
ASIC SIGNAL PROCESSING
DSP isn't the only way to skin the cat, as regards signal processing in the new network. NMS Communications (Framingham, MA - 508-271-1000, www.nmss.com) talked to us, recently, about their e256 echo-cancellation ASIC, technology developed and acquired from Lucent - the product of years of subtle development in unspooling programmatic DSP algorithms and vitrifying them on-chip, achieving factor-of-ten improvements in throughput, as well as serious power savings.
The e256 supports 256 channels of echo cancellation at 64 ms "tail length" (the time-window through which signal is observed and echos removed); 128 channels at 128 ms. Though it's a rule-of-thumb that latency becomes audible beyond about 64 ms, the longer tail length is supported for the sake of (hopefully latency-tolerant) applications running across complex, heterogeneous networks (read: Internet), that require a longer time-window for good voice quality. The e256 ASIC does this in a very small (15 x 15 mm) form factor, and draws less than 0.7 watts (typical). It interfaces directly with Texas Instruments C5000 and C6000 families of DSPs, and uses a standard 16-bit microprocessor interface compatible with Motorola and Intel processors.
Arnie |
