Patent ID: 9455793
Filing Date: 2016-09-27
CPC Classification: H04H

Claim Text:
1. A method of switching from receiving a first broadcast service to an alternative broadcast service in a digital radio receiver system, the method comprising the steps of: receiving, demodulating and decoding a first broadcast signal to output a first broadcast service, the first broadcast signal comprising a plurality of frames, each frame comprising a plurality of time-interleaved channels, each channel comprising broadcast data associated with one or more broadcast services; detecting a level of deterioration in the first broadcast service that is greater than a threshold level of deterioration; selecting an alternative broadcast service from an alternative broadcast service list based on spectrum awareness data, the spectrum awareness data defines one or more frequencies at which the first broadcast signal is receivable by a receiver, the one or more frequencies of the spectrum awareness data being a filtered subset of the plurality of frequencies at which the first broadcast signal is receivable, and the alternative broadcast service list comprising data defining one or more broadcast services that are linked by a relationship to the first broadcast service; controlling a tuner and/or demodulator and/or decoder of a digital radio receiver to switch to and receive, demodulate and decode the selected alternative broadcast service; and updating the spectrum awareness data during reception of the first broadcast signal, without an interruption to the received broadcast data, by: wherein tuning the tuner to the different frequency, detecting the first broadcast signal at the different frequency, storing the data corresponding with the detected first broadcast signal at the different frequency, and tuning the tuner back to the initial frequency occurs during reception of a portion of the frame corresponding with broadcast data from unwanted broadcast services, such that there is no interruption to decoded desired broadcast data.