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Overview

The ITU has standardized this codec that uses ADPCM compression and is mostly used to record and transmit voice data. Typical applications can be: audio record for camcorder use cases or a voice recorder for portable media players. The codec is also used in DECT cordless phones use this standard and Voice over IP and telephony applications often require support for this standard.

Benefits

Codecs are Fully Compliant: Bit exact thorough testing against standard and test vectors Codecs are Certified: E.g. codecs went through Dolby, Microsoft certification Robustness - no hanging: Codecs are thoroughly tested including floating inverted bits tests Error resilience: Dependent on standard, codecs fill gaps introduced by transmission errors Codecs developed in-house: Issues that may arise are quickly handled by Virage Logic s in-house DSP experts Tested using a large suite of bitstreams: From standard holder, in-house generated, live generated, from customers, etc.

Features

Bit compliant with ITU-T G.726 specifications 16, 24, 32, 40 Kbps bitrates 8 KHz sampling rate Works in little endian mode only Full duplex multi-channel implementation 16-bit PCM samples

Deliverables

Datasheet lists features and characteristics Full C source code for ease of integration and further differentiation Test harness (runs out of box on FPGA or simulator) Run on ARC s XCAM cycle-accurate simulation models Quick and easy performance and I/O measurements Optimize core configuration: cache sizes & configuration, ICCM/DCCM size, busses, etc. Reference Design for multi-codec use cases available Integrated into ARC s Media Software Framework and MQX RTOS Codecs allow multiple instances to be run in parallel Documentation: Datasheet, Release Notes, Getting Started Guide, Reference Document, Code examples All Codecs developed, delivered and supported by Virage Logic staff

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