Encoder decoder CMX649

voicecodec

The CMX649 Adaptive Delta Modulation (ADM) Voice Codec provides full duplex codec functions optimised for cost effective, portable, wireless applications. Standard and lower cost digital voice applications are supported via selectable operating modes. Robust ADM coding simplifies protocol and host software design by eliminating the forward error correction and framing protocols required by other codec algorithms. Multiple codec sample/data rates and codec sample clock sources are supported. Integrated filters reduce external components and adjust to match the selected codec sample rate. Independent encoder and decoder powersave controls minimise power for half duplex wireless links. CVSD for Digital Voice Communication Adaptive Delta Modulation (ADM) Non Linear PCM: µ-Law and A-Law Modes 13-Bit Linear PCM Codec Programmable Analogue Inputs and Outputs, Time Constants for ADM Codec and Anti-Alias and Anti-Image filters Clock and Data Recovery Wide Data-Rate Range: 16 to 128 kb/s Programmable Voice Activity Detector (VAD) Transcoding, internal/external sample clocking and flexible uC interfaces Digital Cordless Headsets and Telephones Personal Area Network (PAN) Voice Links Wireless Digital PBX Full-Duplex Digital Radio Systems Time-Division Duplex (TDD) Systems Portable Digital Voice Communicators Voice Storage and Voice Delay