Adaptive Digital leverages TI's C6424 DSP

The EC-168 C6424 echo cancellation chip is based on Adaptive Digital's AT&T-certified echo cancellation software running on the new TI TMS320C6424 DSP specifically tailored for telecom applications. With TI's introduction of the C6424 DSP, Adaptive Digital is able to support 128 channels of both full-featured echo cancellation and dual tone multiple frequency DTMF detection on a single chip. The Adaptive Digital EC-168 C6424 chip is capable of canceling echo under all conditions up to industry standard 128 ms echo tail length and beyond, said Adaptive Digital. (Click here for a review of TI's TMS320C6424 DSP.

Since the ability to provide voice quality depends mainly on selecting the right echo cancellation technology, Adaptive Digital's "carrier-class" G.168.v8 patented echo canceller provides rapid convergence, advanced comfort noise, and handles a 128 ms echo tail without a performance penalty, according to the company. Adaptive Digital's tone detector, deployed since 1995, maintains strict compliance with industry specifications such as Bellcore/Telcordia GR506 and ITU Q455.

In addition, Adaptive Digital has announced that its entire G.PAK application, which is a scalable and configurable voice-over-packet digital signal processor (DSP) based solution, ports to TI's TMS320C6424 DSP. G.PAK integrates DSP building blocks, such as G.711, G.729, and G.168, required in voice-over-packet systems into a user-friendly turnkey solution. This enables system designers to leverage a proven solution and focus their efforts on rapid product development, said the company.

The G.PAK solution consists of two components: the VoIP DSP software and a Windows-based configuration utility. The VoIP DSP software includes all the DSP functionality necessary for most VoIP applications from IP gateways to IP phones. A typical G.PAK configuration may include echo cancellation, tone detection and generation, conferencing and a variety of voice codecs, such as G.711, G.723, G.728, and G.729. With the G.PAK configuration utility, only the components, channel types and peripherals required by a specific application are used to generate a customized downloadable DSP software image in minutes. By removing unnecessary functionality, the DSP application fits into the most cost-effective DSP chip, said the company.

By porting G.PAK to TI's TMS320C6424 DSP, developers can take advantage of the C6424 DSP's higher channel density and integrated peripherals specifically tuned for telecom applications. Since the C6424 DSP is code compatible with existing C64x devices, additional investment in software engineering is not required allowing Adaptive Technologies to run the G.PAK software on the C6424 DSP within weeks.

In addition to supporting G. 711, G.723, G.729, G.168 echo canceller, tone detection/generation, VAD/CNG, AGC and tone relay, G.PAK now supports G.726, G.728, noise suppression and T.38.

Adaptive Digital's future plans include porting Open G.PAK to the C6424 DSP evaluation module (EVM). Open G.PAK allows users to build a custom DSP application using Code Composer Studio Integration Development Platform (IDE) in conjunction with the Windows-based Open G.PAK configuration tool for purpose of demonstration and early development in advance of the customer's hardware availability. Open G.PAK bridges the gap between inflexible fixed-function chips and custom programmed solutions, said the company.

A demo can be seen at booth # 613 at the 2007 TI Developers Conference Worldwide (TIDC), March 7 to 9, 2007 in Dallas, Texas.

Availability: Open G.PAK is currently available on either the TI TMS320C6416 DSP Starter Kit (DSK) or a TI TMS320DM642 Evaluation Module (EVM) as a free download demo. The demonstration walks the user through configuring a DSP image, downloading it, and running it with real-time voice input and output. To obtain your free demo, visit http://opengpak.adaptivedigital.com. Click on "Free Download". Then click on "Demonstrations".

Adaptive Digital Technologies, Inc. is a member of the TI DSP Third Party Network.

Adaptive Digital Technologies, Inc., www.adaptivedigital.com