CMX638 - Consumer Microcircuits Limited

CMX638 RALCWI Vocoders

The CMX608/CMX618/CMX638 are flexible, high integration, high performance, RALCWI (Robust Advanced Low Complexity Waveform Interpolation) Vocoders, offering near toll quality voice at very low bit rates. A Forward Error Correction (FEC) engine provides optimum performance in real life applications. The RALCWI Vocoder comprises four independent functions whi.

Features

 Near Toll Quality RALCWI Coding Algorithm
 Multiple Bit Rate Modes:
 2400 or 2750 bps
 3600 bps with FEC Enabled
 4-bit Viterbi Soft Decision Decoding
 Integrated Audio CODEC (CMX618/CMX638 only)
 Integrated Input and Output Channel Filters
 20ms, 40ms, 60ms and 80ms Packet Lengths
 No Licensing or Royalty Payments
 Ancillary Audio Functions:
 Voice Activity Detector
 Comfort Noise Generator
 DTMF and Single Tone Regeneration
 1.8V Low Power Operation, 3.3V Tolerant I/O
 Small 48-pin LQFP and VQFN Packages Provisional Issue Applications
 Digital PMR, LMR, Voice Radio
 Digita.