A method of processing a digital radio broadcast signal includes: (a) determining a plurality of current correlation sample values representative of a time delay between samples in an analog audio sample stream and samples in a digital audio sample stream; (b) determining a current inversion status; (c) updating a delay history and an inversion status history; (d) checking the current correlation sample values for consistency with a first confidence threshold; (e) if consistency is found in step (d), determining if each of a first plurality of values in the delay history is consistent within a predetermined range of the current correlation sample values; (f) if consistency is found in step (e), determining if a value in the inversion status history is consistent with the current inversion status; and (g) if the consistency is found in step (f), allowing blending of an output to the digital audio sample stream.

A method for processing a digital audio broadcast signal in a radio receiver, includes: receiving a hybrid broadcast signal; demodulating the hybrid broadcast signal to produce an analog audio stream and a digital audio stream; and using a normalized cross-correlation of envelopes of the analog audio stream and the digital audio stream to measure a time offset between the analog audio stream and the digital audio stream. The time offset can be used to align the analog audio stream and the digital audio stream for subsequent blending of an output of the radio receiver from the analog audio stream to the digital audio stream or from the digital audio stream to the analog audio stream.

A method for processing a digital audio broadcast signal in a radio receiver, includes: receiving a hybrid broadcast signal; demodulating the hybrid broadcast signal to produce an analog audio stream and a digital audio stream; and using a normalized cross-correlation of envelopes of the analog audio stream and the digital audio stream to measure a time offset between the analog audio stream and the digital audio stream. The time offset can be used to align the analog audio stream and the digital audio stream for subsequent blending of an output of the radio receiver from the analog audio stream to the digital audio stream or from the digital audio stream to the analog audio stream.

Methods and systems are described herein for masking a network disruption. In an aspect, a plurality of advertisements can be stored locally to a user device. In an aspect, the user device can receive content from a network. In an aspect, the network can experience a disruption, wherein the disruption prevents the user device from receiving the content. In an aspect, the user device can select one of the plurality of advertisements. The selected advertisement can be presented.

Methods and systems are described herein for masking a network disruption. In an aspect, a plurality of advertisements can be stored locally to a user device. In an aspect, the user device can receive content from a network. In an aspect, the network can experience a disruption, wherein the disruption prevents the user device from receiving the content. In an aspect, the user device can select one of the plurality of advertisements. The selected advertisement can be presented.

A method of processing a digital radio broadcast signal includes: (a) determining a plurality of current correlation sample values representative of a time delay between samples in an analog audio sample stream and samples in a digital audio sample stream; (b) determining a current inversion status; (c) updating a delay history and an inversion status history; (d) checking the current correlation sample values for consistency with a first confidence threshold; (e) if consistency is found in step (d), determining if each of a first plurality of values in the delay history is consistent within a predetermined range of the current correlation sample values; (f) if consistency is found in step (e), determining if a value in the inversion status history is consistent with the current inversion status; and (g) if the consistency is found in step (f), allowing blending of an output to the digital audio sample stream.

A method of processing a digital radio broadcast signal includes: (a) determining a plurality of current correlation sample values representative of a time delay between samples in an analog audio sample stream and samples in a digital audio sample stream; (b) determining a current inversion status; (c) updating a delay history and an inversion status history; (d) checking the current correlation sample values for consistency with a first confidence threshold; (e) if consistency is found in step (d), determining if each of a first plurality of values in the delay history is consistent within a predetermined range of the current correlation sample values; (f) if consistency is found in step (e), determining if a value in the inversion status history is consistent with the current inversion status; and (g) if the consistency is found in step (f), allowing blending of an output to the digital audio sample stream.

A method and apparatus are provided. The apparatus comprises an input for receiving a plurality of data streams carrying misaligned common content. The apparatus further comprises a plurality of buffers configured to delay one or more of the data streams to align the common content, each buffer for storing data blocks of a respective one of the plurality of data streams. The apparatus comprises an output for selecting a data block from the plurality of buffers to form a next data block in an output packet stream comprising the common content. Each data block is stored in a respective buffer along with quality information corresponding to said data block and selecting a data block from the plurality of buffers is carried out in dependence on the quality information.

A method and apparatus are provided. The apparatus comprises an input for receiving a plurality of data streams carrying misaligned common content. The apparatus further comprises a plurality of buffers configured to delay one or more of the data streams to align the common content, each buffer for storing data blocks of a respective one of the plurality of data streams. The apparatus comprises an output for selecting a data block from the plurality of buffers to form a next data block in an output packet stream comprising the common content. Each data block is stored in a respective buffer along with quality information corresponding to said data block and selecting a data block from the plurality of buffers is carried out in dependence on the quality information.

An audio processing circuit is described. The audio processing circuit includes at least one input configured to receive a primary audio signal and a feature generation signal. A feature model estimation circuit is configured to model and output a feature model signal of the primary audio signal. A feature generation circuit is coupled to the feature model estimation circuit and is to receive the feature model signal and the feature generation signal and, in response to the feature model signal modify the feature generation signal; and output a modified representation of the feature generation signal that is more similar to the primary audio signal.