VLSI Completes Test on QCELP Vocoder

VLSI Technology's CDMA+ 13 QCELP vocoder has been successfully tested using the IS-736 modified methodology minimum performance standard.

QCELP vocoders are specified using a reference floating-point model. After the vocoders are implemented on a fixed-point digital signal processor (DSP), they must be tested by an independent laboratory to validate their performance.

Comsat Laboratories performed the testing on VLSI's products. According to the testing lab, VLSI's vocoder met the performance requirements specified under IS-736.

The 13 QCELP vocoder is part of VLSI's CDMA+ single-chip, dual-core baseband solution. In addition to the vocoder, this solution includes an ARM processor, an Oak+ DSP Core, peripherals, an audio codec, a CDMA/AMPS modem, and an EVRC vocoder.

For more information on the baseband processor, click here.