CMX649中文资料Adaptive Delta Modulation (ADM) Voice Codec数据手册CML Micro规格书

描述 Description

As a member of the CML DuraTALK family of digital voice products, 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 (eg. Continuously Variable Slope Delta modulation (CVSD)) 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 are supported. Integrated filters reduce external components and adjust to match the selected codec sample rate. The use of both external and internal codec sample clock sources is supported.
Independent encoder and decoder powersave controls minimise power for half duplex wireless links.
Baseband interfaces to microphone, loudspeaker, host µC and RF transceiver circuits do not require external transcoders or complex voice frame transfer protocols.

特性 Features

· 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 andAnti-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

应用 Application

· 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

简介

CMX649属于集成电路（IC）的编解码器。由制造生产的CMX649编解码器编解码器是用于通过压缩和解压缩来转换数据的半导体器件。数据压缩可提高传输速度并减少存储空间。某些编解码器提供高达 32 位的分辨率，并且分别提供多达 6 个或 8 个模数转换器和数模转换器。除三角积分调制外，还有 I2C、I2S、SPI、串行、HDA、S/DIF、PCM、USB、AC'97 和 SLIMbus 数据接口。