Patent ID: 8976969
Filing Date: 2015-03-10
Classification: H04H

Abstract:
1. An apparatus comprising: a delay unit implemented in a radio receiver, wherein the delay unit is configured to receive a first data stream and a second data stream corresponding respectively to analog-transmitted and digitally-transmitted portions of a simulcast radio program, wherein the delay unit is further configured to determine an amount of an initial time lag between corresponding points of the first data stream and the second data stream; wherein the delay unit, in response to determining that the second data stream lags the first data stream, is configured to increase an amount of delay applied to the first data stream until the first and second data streams reach a target time alignment, and wherein the delay unit is configured to increase the amount of delay at a rate that avoids audible artifacts in an audio output signal generated from the analog-transmitted portion of the radio program, and wherein the delay unit is further configured to store information indicative of the amount of the initial time lag between the first data stream and the second data stream and further configured to use the recorded initial time lag to re-tune the radio receiver to a source of the simulcast radio program.