Patent ID: 9742511
Date: 2017-08-22
CPC Classifications: G10L,H04H

Claim:
1. A method for optimizing watermarking parameters in radio transmissions, the method comprising: during broadcasting of a radio transmission, rotating from a) setting a watermarking parameter to a first value for a first time period, to b) setting the watermarking parameter to a second value, different from the first value, for a second time period subsequent the first time period such that the broadcasting of the radio transmission includes multiple first time periods in which the watermarking parameter is set to the first value sequenced with multiple second time periods in which the watermarking parameter is set to the second value; combining a watermarking signal based on the set one of the first or the second value with a programming signal to produce a combined signal; transmitting the combined signal to a remote receiver that transduces the combined signal via a loudspeaker for the output of the loudspeaker to be received by a decoder that extracts the watermarking signal; obtaining ratings of the radio transmission, the ratings indicating a measured audience for the radio transmission and including a first set of ratings corresponding to the first time periods and a second set of ratings corresponding to the second time periods; averaging the first set of ratings to arrive at a first average rating corresponding to the first time periods and averaging the second set of ratings to arrive at a second average rating corresponding to the second time periods; correlating the first average rating to the first value and the second average rating to the second value; and selecting one of the first value or the second value as the ongoing value for the watermarking parameter based on which of the first average rating or the second average rating is higher.