Audio processor apparatus, methods and computer program products using integrated diversity delay error compensation

A method comprising:

• at an audio processor, determining a correlation of first and second data corresponding to an analog FM component and an HD FM component, respectively, of a broadcast RF signal that corresponds to a first input audio signal previously processed by the audio processor;
• operating the audio processor to generate an analog FM audio signal and an HD FM audio signal from a pre-broadcast input audio signal and to vary a relative timing of the generated analog FM audio signal and the HD FM audio signal based on the determined correlation;
• and
• providing the generated analog FM audio signal and the HD FM audio signal to a digital communications network for transmission to a broadcast RF transmitter, wherein the audio processor comprises an FM/HD receiver, a detector, and a signal processor integrated as a set of circuits therein.

An integrated system for diversity delay error compensation in a transmitter, comprising:

• a. an FM/HD receiver, wherein the FM/HD receiver is configured to receive a radio frequency (RF) FM broadcast produced from an analog FM audio signal and an HD audio signal previously produced by the system, and wherein the FM/HD receiver is further configured to produce analog FM data and HD FM data corresponding to respective analog FM and HD FM components of the received RF FM broadcast;
• b. a detector, wherein the detector is configured to directly receive the analog FM data and HD FM data from the FM/HD receiver, and wherein the detector is further configured to correlate the analog FM data and HD FM data and to determine a timing relationship of the analog FM data and the HD FM data responsive to the correlation;
• and
• c. a signal processor, wherein the signal processor is configured to receive a pre-broadcast input audio signal, and wherein the signal processor is further configured to generate an analog FM audio signal and an HD FM audio signal responsive to the received pre-broadcast input audio signal and to control a relative timing of the generated analog FM audio signal and HD FM audio signal based on the determined timing relationship of the analog FM data and the HD FM generated from the received RF FM broadcast;
• and
• wherein the system is configured to provide the generated analog FM audio signal and the HD FM audio signal to a digital communications network for transmission to a broadcast RF transmitter, and wherein the FM/HD receiver, detector, and signal processor comprise a set of circuits all integrated within an audio processor.