> > Will OGC be able to output arbitrary waveforms, or only video? > > If OGC can generate sine waves, square waves, triangle, etc. > > it would be very useful as a piece of test equipment. It > > could be a tracking generator for the spectrum analyzer? > > I thought it would be interesting to generate RF signals entirely in > the digital domain and use a video DAC to turn it into analog. For > instance, you can have a sine-wave generator, that's completely > digital, and it has parameters that you can use to adjust the > frequency, within a band. BOOM. You have an FM transmitter. Attach > an amplifier, and you can send audio to a nearby radio. > > Say we could do this where we mix a complete TV signal, on channel > 3/4, video with color subcarrier, and the audio channel. Voila. No > more need for a TV chip, and we can get both s-video and encoded. > > If the granularity of our control of the signal is 330Mhz, can we > encode all of the information in the TV signal? Would the steps > between digital levels (1024 of them) be too noisy? Could we fix that > with a low-pass filter?
Are there any roadblocks that would prevent OGC from being an ATSC modulator? E.g. take a mpeg2ts file on disk, and output it as ATSC modulated on channel 3 or 4 on RG6QS and feed that into a digital television or one of the inexpensive ATSC-to-NTSC boxes that are supposed to magically appear before the analog transmissions stop on 2009-02-17. If this works, we wouldn't need to decode the mpeg. We could have the noisy DVR computer in another room and use inexpensive RG6QS to get the signal to the TV. Since this is digital, we wouldn't have the loss of quality that analog modulators give. Anyone have an idea of how much CPU power it would take to do this modulation? Is this something the GPU could do? For Europe (and most of the world), I believe the substitution is /ATSC/DVB-T/ ? _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
