Wideband speech codec aims for multimedia

Edited by the Electronicstalk editorial team Jun 6, 2003

A new top-performance ICELP 10kHz wideband speech codec provides high-quality speech compression and decompression.

Spirit has released a new top-performance ICELP 10kHz wideband speech codec for high-quality speech compression/decompression.

Spirit's ICELP speech codec algorithm is functioning on 10kHz bandwidth that 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 a 16bit PCM bitstream at 20kHz sampling rate, providing 32Kbit/s compression rate.

Speech encoding/decoding is performed independently on the frame-by-frame basis, with a frame length of 16ms and algorithmic delay of 20ms.

"Our new speech compression product is distinguished by high speech quality (more than MOS 4.3) as well as impressive compression rate", says Spirit's CEO Andrew Sviridenko.

"With strong attention to speech quality for both business and consumer telephony and striving for the best performance of our communication DSP software, Spirit keeps leading in DSP development/research and comes up with ideal solutions for multiple telecomms applications".

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

Spirit's ICELP 10kHz speech codec runs on the TMS320C54xx platform.