Patent ID: 7724309
Filing Date: 2010-05-25
Classification: H04L,H04N

Abstract:
1. A method for digital generation of a multichannel signal comprising a plurality of carriers each modulated by a video waveform associated therewith, the video waveform having a blanking period and an active video period, the method comprising the steps of: generating digital representations of a plurality of sinusoidal signals each corresponding to each of the plurality of carriers and having nominal frequencies that are incrementally related by a fundamental frequency that is substantially equal to or larger than the bandwidth of a television channel; and generating digital representations of the video waveform associated with each of the carriers; and modulating each of the digital representations of the plurality of sinusoidal signals with the digital representation of the video waveform associated with the corresponding carrier to form digital representations of a plurality of modulated carriers; and summing said digital representations of the plurality of modulated carriers to form a digital representation of a composite signal; and converting the digital representation of the composite signal to form the multichannel signal.