Patent ID: 9319159
Filing Date: 2016-04-19
CPC Classification: G10L,H04B,H04H

Claim Text:
1. A system configured to generate an improved stereo signal of a received FM radio signal; wherein the received FM radio signal is representable as a mid signal and a side signal; wherein the side signal is indicative of a difference between a left signal and a right signal; the system comprising: a power determination unit configured to determine a plurality of powers for a plurality of subbands of the mid signal, referred to as subband mid powers, and a plurality of powers for a plurality of corresponding subbands of the side signal, referred to as subband side powers; a ratio determination unit configured to determine a plurality of subband mid-to-side ratios as the ratios of the plurality of subband mid powers and the plurality of subband side powers; a quality determination unit configured to determine a quality indicator of the received FM radio signal from the minimum of the plurality of subband mid-to-side ratios across the plurality of subbands; wherein the system is configured to generate the improved stereo signal in dependence of the determined quality indicator.