Search by company

Speech codec provides top quality

Edited by the Electronicstalk editorial team Aug 4, 2003

Spirit's latest ICELP speech codec algorithm operates on 10kHz bandwidth, which exceeds standard specifications for wideband applications and provides top speech quality.

Spirit's latest ICELP speech codec algorithm operates on 10kHz bandwidth, which exceeds standard specifications for wideband applications and provides top speech quality required in multimedia applications and speech storage devices.

The multichannel software codes speech signals and decodes bit streams in 16bit PCM format at 20kHz sampling rate.

Speech encoding/decoding is performed independently on a frame-by-frame basis.

Features include high speech quality (MOS about 4.3), 32000bit/s encoded bit stream rate, a frame size of 16ms, algorithmic delay of 20ms, a sampling rate of 20kHz and compliance with TI's eXpressDSP standard.

The algorithm can be used with two types of interfaces: proprietary and XDAIS compliant, each having certain advantages - the proprietary interface provides significant DSP resource economy whereas XDAIS interface simplifies integration, especially for big software projects.

Spirit's ICELP 10kHz speech codec is available on the Texas Instruments TMS320C54xx DSP platform.