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Component Manufacturers Talk Up HD voice

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December 19, 2012

Component Manufacturers Talk Up HD voice

By Doug Mohney, Contributing Editor

Chip manufacturers and software providers are talking up HD voice on the run-up to International CES (News - Alert) 2013. Conexant and CSR have introduced parts optimized for HD voice while SPIRIT DSP's software will be used by Reliance in its Indian LTE network.

This week Conexant unveiled its new high-performance, HD voice capture IC, the CX20810. The new chip is a higher performance audio analog to digital converter (ADC (News - Alert)) with pre-amp, targeted to voice interactive products, voice conferencing systems, webcams, and surveillance. 

Traditional microphone ADCs with limited dynamic range require adjustment of PGA gain to avoid either saturation of the speech signal or degradation of its signal to noise ratio (SNR) due to a high ADC self-noise floor. The CX20180 has a dynamic of 106dB and maximizes signal quality to avoid saturation. Used with an acoustic echo cancellation system, the CX20810 maintains SNR of a low-level voice signal while avoiding echo saturation. The new chip also supports a microphone array with up to four synchronized ADCs.

CSR has joined with SoundClear to announce r has a highly optimized version of SoundClear's HD voice solution for the CSR8670 chip. The solution provides echo cancellation, noise reduction and speech enhancement, and is available in single or multi-mic configurations. Optimized configurations are available for Bluetooth stereo and mono headsets, the (now almost ubiquitous) Bluetooth speakerboxes, speakerphones, and automotive Bluetooth applications. The SoundClear system monitors and processes voice, echo and noise signal power levels, improving speech quality for more of a natural call experience.

Reliance Group has licensed SPRIT DSP's TeamSpirit Voice&Video Engine Mobile for use in its LTE (News - Alert) network to deliver voice and video calls. The Indian service provider says that by using SPIRIT, it will be able to offer its subscribers high-quality services as an alternative to Skype and commercial over-the-top (OTT) vendors.   SPIRIT DSP (News - Alert) provides a software-based solution for Voice and Video over LTE rather than having to wait for handset manufacturers to deliver a reliable voice over LTE (VoLTE) solution.

TeamSpirit Voice&Video Engines supports both VoLTE and RCS-e. The engines include HD voice and video codecs, echo and noise cancelling, automatic voice and video rate selection, packet delays mitigation, speech enhancement, network adaption, and voice and video synchronization. Video codecs used are VP8 and H.264SVC while SPIRIT provides its own patented IP-MR adaptive and error-resilient HD voice codec.

I expect a lot more HD voice talk coming out of CES as Voice over LTE (VoLTE) is expected to roll out on a lot of networks around the world next year. It will be interesting to see if U.S. carriers talk up HD voice or hold off until later in the year until they are satisfied with their VoLTE deployments.

Want to learn more about the latest in communications and technology? Then be sure to attend ITEXPO Miami 2013, Jan 29- Feb. 1 in Miami, Florida.  Stay in touch with everything happening at ITEXPO (News - Alert). Follow us on Twitter.

Edited by Amanda Ciccatelli

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