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.
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
integrable with existing receivers or audio post processing units
a pure software-based solution (C-Code available)
Noise reduction while preserving stereo separation