Multichannel Vocoder Chip Is Very Flexible

The AMBE-3003 Vocoder Chip offers three separate encoder/decoder operations to enable up to three full-duplex channels. With 62 built-in voice/FEC rates, designers can easily configure the chip to meet most communications systems’ requirements while providing excellent voice quality and robustness to bit errors and background noise. If custom rates are desired, a configuration control packet allows users to set virtually any voice and FEC data rate from 2.0 to 9.6 kbits/s in 50-bit/s increments. For added integration flexibility, the AMBE-3003 offers multiple interfaces and advanced features such as automatic voice/silence detection, adaptive comfort noise insertion, and DTMF call progress tone detection/regeneration. The chip comes in either a 128-pin low-profile quad flatpack or a 179-contact ball grid array package. The chip implements the company’s most advanced AMBE+2 vocoder technology. The AMBE+2 technology outperforms G.729 and G.726 at half the data rate and less, according to the company. DIGITAL VOICE SYSTEMS INC., Westford, MA. (978) 392-0002.