Apparatus, system, and method for processing digital audio/video signals are described. In one embodiment, a decoder is configured to process an input signal having an analog television format. The decoder includes a signal detector, and the signal detector is configured to determine whether the input signal incorporates a digital television signal. The decoder also includes a signal extractor connected to the signal detector, and the signal extractor is configured to extract the digital television signal from the input signal based on determining that the input signal incorporates the digital television signal.