CMX608

CML Microcircuits COMMUNICATION SEMICONDUCTORS CMX608/CMX618/ CMX638 RALCWI Vocoders D/608_18_38/11 September 2014 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  Digital Trunking  DMR TDMA  DMR FDMA, dPMR  Digital Voice Scrambling and Encryption  Digital WLL  Voice Storage and Playback Systems  Regenerative Digital Voice Repeaters  Messaging Systems  VoIP Systems  Voice Pagers  Half-Duplex Vocoding (CMX608/CMX618)  Full-Duplex Vocoding (CMX638 only) 1. Brief Description 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 which are selectable by the host: Voice Encoder, FEC Encoder, Voice Decoder and FEC Decoder. The C...