Cisco Systems has implemented the Prometheus patented PONS technology (US Patent #5,913,186, 1999) in a SIP-based prototype Voice over IP (VoIP) softphone. The PONS-based wideband codec implementation on the prototype has trivial computational complexity and operates at both 16k and 8k sampling rates with full 16 bit dynamic range. The result is: better than telephone network acoustic bandwidth (full 8 kHz), full CD-quality dynamic range (over 96 dB), with trivial computational complexity (on the order of 10 operations per sample).
