Consumer Microcircuits Limited CMX618
The CMX618 includes an integrated voice CODEC, offering a complete analogue voice to low bit rate vocoded data function, with integrated channel filters removing the need for external components, whereas the CMX608 requires an external voice CODEC. The optional FEC encoder performs channel coding of the encoded voice (2400bps or 2750bps, depending on the selected mode) and forms an encoded, interleaved bit-stream of 3600bps (216 bits per 60ms packet or 288 bits per 80ms packet).| Part No. | CMX618 |
|---|---|
| Datasheet | CMX618 Download |
| Manufacturer |  Consumer Microcircuits Limited |
| Description | RALCWI Vocoders |
| Buy | Stock & Price |
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.
