8 Kbit/s CELP on the TMS320C5x family of DSP chips

• Description: For low bandwidth transmission of voice, compact voice storage for archival purposes, low-cost digital answering machines and efficient storage for voice mail. Features :
  • near toll quality at 8 Kb/s.
  • Variable rate option with 1 Kb/s silence encoding.
  • Implemented on a fixed-point processor for lower system cost.
  • Attractive licensing scheme.
  • Future availability of 4 Kb/s.
  • Custom rates possible.
  Capacity :
  • Two half-duplex or one full duplex channels on the 20 MIPS 'C5x (at 95% and 55% CPU utilization respectively).
  • Two full duplex channels on the 28.6 MIPS 'C5x (at 77% CPU utilization).
  • Requires 9 K-words program memory and 3 K-words data memory.
  • Decoding in real-time on a 486 class CPU.
• Contact:
  CVI Inc.
  443 Vienna Cres. North Vancouver, BC, Canada V7N 3B3
  Tel: (604) 987 1719 Fax: (604) 986 8139
  Email: cvi@extropia.wimsey.com