At a glance
The signal processing method presented here considerably improves FM stereo reception and enables full stereo reception in an extended area. It reduces noise and other types of interference to mono quality without deteriorating the left-right channel separation. It maintains the audio signal-to-noise ratio at a high level, down to the FM threshold. For a receiver using this new technology the stereo coverage area of a transmitter is extended to the mono coverage area.
To fully exploit the benefits of the method, functions of the FM receiver such as stereo-blend and hi-blend should be disabled.
Core features
Up to 22 dB less noise while preserving stereo separation
Reduction of all types of interference, including multipath interference and interference from IBOC
Only L and R needed as input signals
Undisturbed audio signals are passed audibly unchanged
Can be connected as a stand-alone device to existing receivers or audio post-processing units
Software-based solution (C-Code available), portable to software-designed radio (SDR)
Example
Noise reduction while preserving stereo separation
The method is fully compatible with the pilot-tone system described in FM Stereo transmission standard ITU-R BS.450 and is applicable worldwide in the following sectors:
- automotive
- smartphones
- Hi-Fi/high-end Stereo
- professional broadcasting
Read more >>> (technology of the noise reduction method)
